Finalize structured diagnostic aggregation

docs/roadmap/implementation.md

@@ -481,7 +481,7 @@ observations can be present while the warning group count remains zero.
 This stage is appropriately sized for one high-reasoning
 `gpt-5.6-terra` prompt.
 
-## Stage 8 — Remove The Legacy Warning Path And Finalize Aggregation
+## Stage 8 ✅ — Remove The Legacy Warning Path And Finalize Aggregation
 
 ### Goal
 

internal/cli/assembled_spell_pipeline_contract_test.go

@@ -77,22 +77,22 @@ func TestAssembledSpellPipelineNormalizesMergedCasts(t *testing.T) {
 		spellnormalize.ReasonCodeDuplicateSpellCastCollapsed,
 		"spell_not_near_source",
 	}
-	gotWarningReasons := make([]string, len(output.Warnings))
+	gotWarningReasons := make([]string, len(output.Diagnostics.Groups))
-	for index, warning := range output.Warnings {
+	for index, group := range output.Diagnostics.Groups {
-		gotWarningReasons[index] = warning.ReasonCode
+		gotWarningReasons[index] = group.ReasonCode
 	}
 	if !reflect.DeepEqual(gotWarningReasons, wantWarningReasons) {
-		t.Fatalf("warnings = %#v, want deterministic normalize and validation warnings", output.Warnings)
+		t.Fatalf("diagnostics = %#v, want deterministic normalize and validation diagnostics", output.Diagnostics)
 	}
-	if output.Warnings[2].Scope != "spell_casts[0]" || !strings.Contains(output.Warnings[2].Message, "retained input index 0") || !strings.Contains(output.Warnings[2].Message, "removed input indices [1]") {
+	if output.Diagnostics.Groups[2].Samples[0].Scope != "spell_casts[0]" || !strings.Contains(output.Diagnostics.Groups[2].Samples[0].Message, "retained input index 0") || !strings.Contains(output.Diagnostics.Groups[2].Samples[0].Message, "removed input indices [1]") {
-		t.Fatalf("duplicate warning = %#v, want retained and removed merged indices", output.Warnings[2])
+		t.Fatalf("duplicate diagnostic = %#v, want retained and removed merged indices", output.Diagnostics.Groups[2])
 	}
 
 	warningsFile := decodeAssembledOutput[struct {
-		Warnings []contracts.Warning `json:"warnings"`
+		Groups []contracts.DiagnosticGroup `json:"groups"`
 	}](t, output.OutputFiles, "warnings.json")
-	if !reflect.DeepEqual(warningsFile.Warnings, output.Warnings) {
+	if len(warningsFile.Groups) != 0 {
-		t.Fatalf("warnings file = %#v, run warnings = %#v, want manifest output path to preserve warnings", warningsFile.Warnings, output.Warnings)
+		t.Fatalf("warnings file = %#v, want no process warnings for advisory-only diagnostics", warningsFile.Groups)
 	}
 	manifest := decodeAssembledOutput[artifacts.RunManifest](t, output.OutputFiles, "manifest.json")
 	if len(manifest.ArtifactLanes) != 1 || manifest.ArtifactLanes[0].Normalizer != spellnormalize.Key {
@@ -155,9 +155,9 @@ func TestAssembledSpellPipelineHonorsNormalizeValidatorOverride(t *testing.T) {
 	if err != nil || output.Manifest.ValidationStatus != "approved" || len(output.Rejected) != 0 || len(output.NormalizeOutputs) != 1 {
 		t.Fatalf("Run() error = %v output = %#v, want approved override run", err, output)
 	}
-	for _, warning := range output.Warnings {
+	for _, group := range output.Diagnostics.Groups {
-		if warning.ReasonCode == "spell_not_near_source" {
+		if group.ReasonCode == "spell_not_near_source" {
-			t.Fatalf("warnings = %#v, want explicit validator override to replace default relatedness chain", output.Warnings)
+			t.Fatalf("diagnostics = %#v, want explicit validator override to replace default relatedness chain", output.Diagnostics)
 		}
 	}
 }
@@ -190,8 +190,8 @@ func TestAssembledSpellPipelinePromotesTerminalUnknownSpellWarning(t *testing.T)
 	if !reflect.DeepEqual(rejectedFile.Rejected, output.Rejected) {
 		t.Fatalf("rejected file = %#v, run rejections = %#v, want durable rejection diagnostic", rejectedFile.Rejected, output.Rejected)
 	}
-	if len(output.Warnings) != 2 || output.Warnings[0].ReasonCode != spellnormalize.ReasonCodeSpellNameUnresolved || output.Warnings[0].Scope != "spell_casts[0]" || output.Warnings[1].ReasonCode != "spell_not_near_source" {
+	if len(output.Diagnostics.Groups) != 2 || output.Diagnostics.Groups[0].ReasonCode != spellnormalize.ReasonCodeSpellNameUnresolved || output.Diagnostics.Groups[0].Samples[0].Scope != "spell_casts[0]" || output.Diagnostics.Groups[1].ReasonCode != "spell_not_near_source" {
-		t.Fatalf("warnings = %#v, want complete terminal normalize validation warnings", output.Warnings)
+		t.Fatalf("diagnostics = %#v, want complete terminal normalize validation diagnostics", output.Diagnostics)
 	}
 }
 
@@ -219,14 +219,14 @@ func TestAssembledSpellPipelinePromotesUnknownSpellWarningWhenOverrideAccepts(t
 	if len(normalized.SpellCasts) != 1 || normalized.SpellCasts[0].Spell != "Mysterious Burst" {
 		t.Fatalf("normalized casts = %#v, want unresolved name preserved", normalized.SpellCasts)
 	}
-	if len(output.Warnings) != 1 || output.Warnings[0].ReasonCode != spellnormalize.ReasonCodeSpellNameUnresolved || output.Warnings[0].Scope != "spell_casts[0]" {
+	if len(output.Diagnostics.Groups) != 1 || output.Diagnostics.Groups[0].ReasonCode != spellnormalize.ReasonCodeSpellNameUnresolved || output.Diagnostics.Groups[0].Samples[0].Scope != "spell_casts[0]" {
-		t.Fatalf("warnings = %#v, want promoted scoped unresolved-name warning", output.Warnings)
+		t.Fatalf("diagnostics = %#v, want promoted scoped unresolved-name diagnostic", output.Diagnostics)
 	}
 	warningsFile := decodeAssembledOutput[struct {
-		Warnings []contracts.Warning `json:"warnings"`
+		Groups []contracts.DiagnosticGroup `json:"groups"`
 	}](t, output.OutputFiles, "warnings.json")
-	if !reflect.DeepEqual(warningsFile.Warnings, output.Warnings) {
+	if len(warningsFile.Groups) != 0 {
-		t.Fatalf("warnings file = %#v, run warnings = %#v, want durable unresolved-name warning", warningsFile.Warnings, output.Warnings)
+		t.Fatalf("warnings file = %#v, want no process warnings for an advisory diagnostic", warningsFile.Groups)
 	}
 }
 

internal/cli/dnd_scene_descriptions_contract_test.go

@@ -91,8 +91,8 @@ func TestProductionSceneDescriptionWorkflow(t *testing.T) {
 	if !reflect.DeepEqual(durable, want) {
 		t.Fatalf("durable output payload = %#v, want %#v", durable, want)
 	}
-	if len(output.Warnings) != 0 {
+	if len(output.Diagnostics.Groups) != 0 {
-		t.Fatalf("warnings = %#v, want grounded descriptions without warnings", output.Warnings)
+		t.Fatalf("diagnostics = %#v, want grounded descriptions without diagnostics", output.Diagnostics)
 	}
 }
 

internal/cli/example_contract_test.go

@@ -239,10 +239,10 @@ func TestMaintainedMinimalInvocationProducesJSONBundle(t *testing.T) {
 		t.Fatalf("rejected = %#v, want empty rejection list", rejected.Rejected)
 	}
 	warnings := readProductionJSON[struct {
-		Warnings []json.RawMessage `json:"warnings"`
+		Groups []json.RawMessage `json:"groups"`
 	}](t, filepath.Join(runRoot, "warnings.json"))
-	if len(warnings.Warnings) != 0 {
+	if len(warnings.Groups) != 0 {
-		t.Fatalf("warnings = %#v, want empty warning list", warnings.Warnings)
+		t.Fatalf("warnings = %#v, want empty warning list", warnings.Groups)
 	}
 }
 

internal/cli/production_contract_test.go

@@ -852,10 +852,10 @@ func TestProductionSceneRunRecordsAnnotationFreeChunkPlanAndProvenance(t *testin
 		t.Fatalf("chunk map range annotations = %#v, want none", chunkMap.Chunks[0].Annotations)
 	}
 	warnings := readProductionJSON[struct {
-		Warnings []contracts.Warning `json:"warnings"`
+		Groups []contracts.DiagnosticGroup `json:"groups"`
 	}](t, filepath.Join(outputRoot, productionRunID, "warnings.json"))
-	if len(warnings.Warnings) != 0 {
+	if len(warnings.Groups) != 0 {
-		t.Fatalf("warnings = %#v, want none", warnings.Warnings)
+		t.Fatalf("warnings = %#v, want none", warnings.Groups)
 	}
 	if len(fake.requestsFor(scenes.PromptID)) != 1 || len(fake.requestsFor(spells.PromptID)) != 1 || len(fake.requestsFor(itemoccurrenceextract.PromptID)) != 1 {
 		t.Fatalf("fake prompt requests = %#v, want one scene, spell, and item-occurrence request", fake.requestPrompts())

internal/cli/run.go

@@ -375,7 +375,7 @@ func runPipelineCommand(args []string, stdout, stderr io.Writer, opts Options) i
 	if err != nil {
 		return failPipelineCommand(stderr, commandState, terminalWriter, fmt.Errorf("resolve working directory: %w", err))
 	}
-	materialized, referenceWarnings, err := pipeline.MaterializeReferences(effective.ResolvedPipeline, catalog, pipeline.ReferenceMaterializationOptions{
+	materialized, referenceDiagnostics, err := pipeline.MaterializeReferences(effective.ResolvedPipeline, catalog, pipeline.ReferenceMaterializationOptions{
 		ConfigPath: loadedConfigPath,
 		WorkingDir: workingDir,
 	})
@@ -462,7 +462,7 @@ func runPipelineCommand(args []string, stdout, stderr io.Writer, opts Options) i
 		StartedAt:        startedAt,
 		LLMProfiles:      llmProfiles,
 		Metadata:         runMetadata(effective.Config.Output.Directory, debugPath),
-		Diagnostics:      pipeline.ReferenceDiagnostics(referenceWarnings),
+		Diagnostics:      referenceDiagnostics,
 		ChunkCacheMode:   effective.Config.Cache.ChunkPlans.Mode,
 		ChunkPlans:       chunkPlans,
 		Checkpoints:      checkpointRecorder,
@@ -513,8 +513,8 @@ func runPipelineCommand(args []string, stdout, stderr io.Writer, opts Options) i
 			fmt.Fprintf(stdout, "debug=%s\n", debugPath)
 		}
 	}
-	if len(output.Warnings) > 0 {
+	if warningCount := warningGroupCount(output.Diagnostics); warningCount > 0 {
-		fmt.Fprintf(stderr, "notarius: run completed with %d warning(s)\n", len(output.Warnings))
+		fmt.Fprintf(stderr, "notarius: run completed with %d warning(s)\n", warningCount)
 	}
 	return 0
 }
@@ -538,7 +538,7 @@ func writePartialSummary(summary *debugbundle.SummaryWriter, output pipeline.Run
 			return err
 		}
 	}
-	if err := summary.WriteWarnings(output.Warnings); err != nil {
+	if err := summary.WriteWarnings(output.Diagnostics); err != nil {
 		return err
 	}
 	return summary.WriteCheckpointEvents(output.CheckpointEvents)

internal/cli/run_contract_test.go

@@ -590,7 +590,7 @@ func TestRunWarningsRemainSuccessfulAndReachDurableSurfaces(t *testing.T) {
 	roots := newStateTestRoots(t)
 	harness := newStateTestHarness()
 	harness.includeWarnings = true
-	harness.chunkWarnings = []contracts.Warning{{Scope: "chunk", ReasonCode: "contract-warning", Message: "warning retained"}}
+	harness.chunkDiagnostics = []contracts.ProducerDiagnostic{stateTestDiagnostic("chunk", "contract-warning", "warning retained")}
 	var stdout, stderr bytes.Buffer
 	code := RunWithOptions([]string{"run", "sample", "--config", roots.config, "--input", roots.input, "--chunk_cache", "bypass", "--debug"}, &stdout, &stderr, harness.options())
 	if code != 0 || !strings.Contains(stdout.String(), "outputs=1") || !strings.Contains(stderr.String(), "1 warning(s)") {
@@ -602,10 +602,10 @@ func TestRunWarningsRemainSuccessfulAndReachDurableSurfaces(t *testing.T) {
 		t.Fatalf("durable output = %q, %v", output, err)
 	}
 	bundle := onlyChildDir(t, roots.debug)
-	var warnings []contracts.Warning
+	var diagnostics contracts.DiagnosticCollection
-	readStateTestSummaryJSON(t, bundle, "warnings.json", &warnings)
+	readStateTestSummaryJSON(t, bundle, "warnings.json", &diagnostics)
-	if len(warnings) != 1 || warnings[0].ReasonCode != "contract-warning" {
+	if len(diagnostics.Groups) != 1 || diagnostics.Groups[0].ReasonCode != "contract-warning" {
-		t.Fatalf("debug warnings = %#v", warnings)
+		t.Fatalf("debug diagnostics = %#v", diagnostics)
 	}
 }
 

internal/cli/run_result.go

@@ -8,6 +8,7 @@ import (
 	"strings"
 
 	"gitea.maximumdirect.net/eric/notarius/internal/core/artifacts"
+	"gitea.maximumdirect.net/eric/notarius/internal/framework/contracts"
 	"gitea.maximumdirect.net/eric/notarius/internal/framework/pipeline"
 )
 
@@ -59,7 +60,7 @@ func newRunResult(resolved pipeline.ResolvedPipeline, output pipeline.RunOutput,
 		OutputDirectory:       absOutputDirectory,
 		NormalizedOutputCount: len(output.NormalizeOutputs),
 		RejectedOutputCount:   len(output.Rejected),
-		WarningCount:          len(output.Warnings),
+		WarningCount:          warningGroupCount(output.Diagnostics),
 		ValidationStatus:      output.Manifest.ValidationStatus,
 		ValidationSummaries:   cloneValidationSummaries(output.Manifest.ValidationSummaries),
 	}
@@ -88,6 +89,16 @@ func newRunResult(resolved pipeline.ResolvedPipeline, output pipeline.RunOutput,
 	return result, nil
 }
 
+func warningGroupCount(diagnostics contracts.DiagnosticCollection) int {
+	count := 0
+	for _, group := range diagnostics.Groups {
+		if group.Disposition == contracts.DiagnosticDispositionWarning {
+			count++
+		}
+	}
+	return count
+}
+
 func cloneValidationSummaries(summaries []artifacts.ValidationSummary) []artifacts.ValidationSummary {
 	if len(summaries) == 0 {
 		return nil

internal/cli/run_result_command_test.go

@@ -63,7 +63,7 @@ func TestMaintainedMinimalInvocationEmitsRunResult(t *testing.T) {
 func TestRunResultReportsWarningsAndDebugBundle(t *testing.T) {
 	roots := newStateTestRoots(t)
 	harness := newStateTestHarness()
-	harness.chunkWarnings = []contracts.Warning{{Scope: "chunk", ReasonCode: "contract-warning", Message: "warning retained"}}
+	harness.chunkDiagnostics = []contracts.ProducerDiagnostic{stateTestDiagnostic("chunk", "contract-warning", "warning retained")}
 	var stdout, stderr bytes.Buffer
 	code := RunWithOptions([]string{
 		"run", "sample", "--config", roots.config, "--input", roots.input,

internal/cli/run_result_test.go

@@ -182,7 +182,9 @@ func testRunOutput() pipeline.RunOutput {
 		Manifest:         artifacts.RunManifest{RunID: "run-123", PipelineID: "sample", ValidationStatus: "rejected"},
 		NormalizeOutputs: []contracts.SerializedOutput{{}, {}},
 		Rejected:         []contracts.RejectedOutput{{}},
-		Warnings:         []contracts.Warning{{}},
+		Diagnostics: contracts.DiagnosticCollection{Groups: []contracts.DiagnosticGroup{{
+			Disposition: contracts.DiagnosticDispositionWarning,
+		}}},
 		OutputFiles: []contracts.OutputFile{{Name: "index.json"}},
 	}
 }

internal/cli/run_terminal.go

@@ -39,7 +39,7 @@ func (s *pipelineCommandState) observeOutput(output pipeline.RunOutput) {
 	}
 	s.report.OutputCount = len(output.NormalizeOutputs)
 	s.report.RejectedCount = len(output.Rejected)
-	s.report.WarningCount = len(output.Warnings)
+	s.report.WarningCount = warningGroupCount(output.Diagnostics)
 	s.report.ValidationStatus = output.Manifest.ValidationStatus
 }
 

internal/cli/spell_catalog_identity_contract_test.go

@@ -238,7 +238,7 @@ func TestChangedSemanticSpellCatalogFingerprintCannotResumeRecordedCheckpoint(t
 			Kind: dnd.SpellListKind, Schema: normalizeSchema, MediaType: "application/json", Content: []byte(`{"spell_casts":[]}`),
 		},
 	}
-	if err := recorder.NormalizeSucceeded("spells", spellnormalize.Key, normalizeDependencies, normalizeArtifact, nil); err != nil {
+	if err := recorder.NormalizeSucceeded("spells", spellnormalize.Key, normalizeDependencies, normalizeArtifact); err != nil {
 		t.Fatal(err)
 	}
 

internal/cli/spell_catalog_retry_contract_test.go

@@ -92,8 +92,8 @@ func TestProductionSpellCatalogValidationRetries(t *testing.T) {
 				if rejection.ReasonCode != "unknown_spell" || rejection.AttemptCount != retries+1 {
 					t.Fatalf("rejection = %#v, want exhausted unknown-spell rejection", rejection)
 				}
-				if len(output.Warnings) != 1 || output.Warnings[0].ReasonCode != "spell_not_near_source" {
+				if len(output.Diagnostics.Groups) != 1 || output.Diagnostics.Groups[0].ReasonCode != "spell_not_near_source" {
-					t.Fatalf("warnings = %#v, want complete terminal validation warnings", output.Warnings)
+					t.Fatalf("diagnostics = %#v, want complete terminal validation diagnostic", output.Diagnostics)
 				}
 				return
 			}
@@ -108,8 +108,8 @@ func TestProductionSpellCatalogValidationRetries(t *testing.T) {
 			if len(value.SpellCasts) != 1 || value.SpellCasts[0].Spell != tt.wantSpell {
 				t.Fatalf("normalized spell list = %#v, want accepted overlay spell", value)
 			}
-			if len(output.Warnings) != 1 || output.Warnings[0].ReasonCode != tt.wantWarningCode {
+			if len(output.Diagnostics.Groups) != 2 || output.Diagnostics.Groups[0].ReasonCode != tt.wantWarningCode {
-				t.Fatalf("warnings = %#v, want the terminal extract compatibility projection", output.Warnings)
+				t.Fatalf("diagnostics = %#v, want terminal extract and normalize diagnostics", output.Diagnostics)
 			}
 			if len(output.Diagnostics.Groups) != 2 {
 				t.Fatalf("diagnostics = %#v, want extract and normalize data-quality advisories", output.Diagnostics)

internal/cli/state_hardening_test.go

@@ -445,7 +445,7 @@ func TestRunWritesTerminalArtifactsForResolutionPipelineAndOutputFailures(t *tes
 func TestRunRetainsPartialPipelineOutcomeInFailureSummary(t *testing.T) {
 	roots := newStateTestRoots(t)
 	harness := newStateTestHarness()
-	harness.chunkWarnings = []contracts.Warning{{Scope: "chunk", ReasonCode: "partial-warning", Message: "warning retained before failure"}}
+	harness.chunkDiagnostics = []contracts.ProducerDiagnostic{stateTestDiagnostic("chunk", "partial-warning", "warning retained before failure")}
 	harness.extractErr = errors.New("synthetic partial pipeline failure")
 
 	result := runStateTest(t, roots, harness.options(), true, true, "bypass")
@@ -463,10 +463,10 @@ func TestRunRetainsPartialPipelineOutcomeInFailureSummary(t *testing.T) {
 	if manifest.RunID != report.RunID || manifest.PipelineID != "sample" || manifest.ValidationStatus != "failed" {
 		t.Fatalf("partial manifest = %#v", manifest)
 	}
-	var warnings []contracts.Warning
+	var diagnostics contracts.DiagnosticCollection
-	readStateTestSummaryJSON(t, bundlePath, "warnings.json", &warnings)
+	readStateTestSummaryJSON(t, bundlePath, "warnings.json", &diagnostics)
-	if len(warnings) != 1 || warnings[0].ReasonCode != "partial-warning" {
+	if len(diagnostics.Groups) != 1 || diagnostics.Groups[0].ReasonCode != "partial-warning" {
-		t.Fatalf("partial warnings = %#v", warnings)
+		t.Fatalf("partial diagnostics = %#v", diagnostics)
 	}
 	var events []pipeline.CheckpointEvent
 	readStateTestSummaryJSON(t, bundlePath, "checkpoint-events.json", &events)
@@ -863,10 +863,10 @@ type stateTestHarness struct {
 	chunkCalls, extractCalls int
 	runIDCalls               uint64
 	extractErr               error
-	chunkWarnings            []contracts.Warning
+	chunkDiagnostics         []contracts.ProducerDiagnostic
 	moduleProfiles           []string
 	sessionIDs               []string
-	outputWarnings           []contracts.Warning
+	outputDiagnostics        contracts.DiagnosticCollection
 	includeWarnings          bool
 }
 
@@ -892,7 +892,7 @@ func (h *stateTestHarness) options() Options {
 		panic(err)
 	}
 	if err := registries.Outputs.RegisterWithSpec(pipeline.ModuleSpec{Key: "test/output", Stage: pipeline.StageOutput, ExecutionClass: contracts.ExecutionClassDeterministic, Requires: []string{"normalized"}, Provides: []string{"output"}}, func() (contracts.OutputEncoder, error) {
-		return stateTestOutput{harness: h, includeWarnings: h.includeWarnings}, nil
+		return stateTestOutput{harness: h, includeDiagnostics: h.includeWarnings}, nil
 	}); err != nil {
 		panic(err)
 	}
@@ -931,7 +931,7 @@ func (c stateTestChunker) Plan(_ context.Context, req contracts.ChunkRequest) (c
 	c.harness.mu.Lock()
 	c.harness.chunkCalls++
 	c.harness.mu.Unlock()
-	return contracts.ChunkPlanResult{Plan: source.ChunkPlan{SourceDigest: req.Source.Digest, Ranges: []source.ChunkRange{{StartUnitID: 1, EndUnitID: 1}}}, Warnings: append([]contracts.Warning(nil), c.harness.chunkWarnings...)}, nil
+	return contracts.ChunkPlanResult{Plan: source.ChunkPlan{SourceDigest: req.Source.Digest, Ranges: []source.ChunkRange{{StartUnitID: 1, EndUnitID: 1}}}, Diagnostics: contracts.CloneProducerDiagnostics(c.harness.chunkDiagnostics)}, nil
 }
 
 const stateTestArtifactKind contracts.ArtifactKind = "test/artifact"
@@ -1000,21 +1000,25 @@ func (n stateTestNormalizer) Normalize(_ context.Context, req contracts.TypedNor
 
 type stateTestOutput struct {
 	harness            *stateTestHarness
-	includeWarnings bool
+	includeDiagnostics bool
 }
 
 func (o stateTestOutput) Key() string { return "test/output" }
 func (o stateTestOutput) Encode(_ context.Context, req contracts.OutputRequest) (contracts.OutputResult, error) {
 	o.harness.mu.Lock()
-	o.harness.outputWarnings = append([]contracts.Warning(nil), req.Warnings...)
+	o.harness.outputDiagnostics = contracts.CloneDiagnosticCollection(req.Diagnostics)
 	o.harness.mu.Unlock()
 	data := []byte("{\"ok\":true}\n")
-	if o.includeWarnings && len(req.Warnings) > 0 {
+	if o.includeDiagnostics && len(req.Diagnostics.Groups) > 0 {
-		data = []byte(fmt.Sprintf("{\"ok\":true,\"warnings\":%q}\n", req.Warnings[0].ReasonCode))
+		data = []byte(fmt.Sprintf("{\"ok\":true,\"diagnostics\":%q}\n", req.Diagnostics.Groups[0].ReasonCode))
 	}
 	return contracts.OutputResult{Files: []contracts.OutputFile{{Name: "result.json", Bytes: data}}}, nil
 }
 
+func stateTestDiagnostic(scope, reasonCode, message string) contracts.ProducerDiagnostic {
+	return contracts.ProducerDiagnostic{Disposition: contracts.DiagnosticDispositionWarning, Category: contracts.DiagnosticCategoryDegradation, ReasonCode: reasonCode, OccurrenceCount: 1, Samples: []contracts.DiagnosticSample{{Scope: scope, Message: message}}}
+}
+
 type failingDebugRecorder struct{}
 
 func (failingDebugRecorder) Enabled() bool                   { return true }

internal/core/debugbundle/bundle_test.go

@@ -110,7 +110,7 @@ func TestSummaryWriterWritesEverySummaryArtifact(t *testing.T) {
 	if err := summary.WriteRunReport(RunReport{RunID: bundle.RunID(), PipelineID: "test"}); err != nil {
 		t.Fatal(err)
 	}
-	if err := summary.WriteWarnings([]contracts.Warning{{ReasonCode: "test"}}); err != nil {
+	if err := summary.WriteWarnings(contracts.DiagnosticCollection{}); err != nil {
 		t.Fatal(err)
 	}
 	if err := summary.WriteError("failed"); err != nil {

internal/core/debugbundle/summary.go

@@ -101,7 +101,7 @@ func (w *SummaryWriter) WriteChunkPlan(v artifacts.ChunkPlanSummary) error {
 	return w.writeJSON(ArtifactChunkPlan, v)
 }
 func (w *SummaryWriter) WriteRunReport(v RunReport) error { return w.writeJSON(ArtifactRunReport, v) }
-func (w *SummaryWriter) WriteWarnings(v []contracts.Warning) error {
+func (w *SummaryWriter) WriteWarnings(v contracts.DiagnosticCollection) error {
 	return w.writeJSON(ArtifactWarnings, v)
 }
 func (w *SummaryWriter) WriteError(message string) error {

internal/framework/checkpoint/filesystem_test.go

@@ -24,7 +24,6 @@ type filesystemCheckpointFixture struct {
 	merge        pipeline.CheckpointArtifact
 	normalize    pipeline.CheckpointArtifact
 	dependencies []pipeline.CheckpointFingerprint
-	warnings     []contracts.Warning
 	rejected     []contracts.RejectedOutput
 }
 
@@ -39,7 +38,6 @@ func TestFilesystemCheckpointRoundTripsAllStages(t *testing.T) {
 	fixture.extract.Diagnostics[0].Diagnostic.Samples[0].Message = "caller mutation"
 	fixture.merge.Artifact.Content[0] = 'x'
 	fixture.normalize.Artifact.Content[0] = 'x'
-	fixture.warnings[0].Message = "caller mutation"
 	fixture.rejected[0].Message = "caller mutation"
 
 	t.Run("source", func(t *testing.T) {
@@ -61,11 +59,11 @@ func TestFilesystemCheckpointRoundTripsAllStages(t *testing.T) {
 
 	t.Run("extract", func(t *testing.T) {
 		got, decision := fixture.loader.Extract("lane-a", "extract-module", fixture.dependencies)
-		if !decision.Reused || len(got.Outputs) != 1 || len(got.Rejected) != 1 || len(got.Warnings) != 1 || len(got.Outputs[0].Diagnostics) != 1 {
+		if !decision.Reused || len(got.Outputs) != 1 || len(got.Rejected) != 1 || len(got.Outputs[0].Diagnostics) != 1 {
 			t.Fatalf("extract result=%#v decision=%#v", got, decision)
 		}
 		output := got.Outputs[0]
-		if !bytes.Equal(output.Artifact.Content, []byte(`{"spell":"fire"}`)) || output.Artifact.Kind != "spell" || output.Artifact.Schema.ID != "spell-schema" || output.Artifact.Schema.Version != "1" || output.Artifact.MediaType != "application/json" || output.Artifact.Metadata["chunk"] != "chunk-a" || output.ChunkRef.StartUnitID != 1 || output.Diagnostics[0].Diagnostic.ReasonCode != "normalized_record" || got.Warnings[0].ReasonCode != "partial" || got.Rejected[0].ReasonCode != "invalid_source" {
+		if !bytes.Equal(output.Artifact.Content, []byte(`{"spell":"fire"}`)) || output.Artifact.Kind != "spell" || output.Artifact.Schema.ID != "spell-schema" || output.Artifact.Schema.Version != "1" || output.Artifact.MediaType != "application/json" || output.Artifact.Metadata["chunk"] != "chunk-a" || output.ChunkRef.StartUnitID != 1 || output.Diagnostics[0].Diagnostic.ReasonCode != "normalized_record" || got.Rejected[0].ReasonCode != "invalid_source" {
 			t.Fatalf("extract values were not restored: %#v", got)
 		}
 		manifest := readManifest[ExtractLaneManifest](t, filepath.Join(fixture.root, mustRelativePath(t, fixture.identity), "extract", "lane-a", "manifest.json"))
@@ -74,37 +72,36 @@ func TestFilesystemCheckpointRoundTripsAllStages(t *testing.T) {
 		}
 
 		got.Outputs[0].Artifact.Content[0] = 'y'
-		got.Warnings[0].Message = "loaded mutation"
 		reloaded, decision := fixture.loader.Extract("lane-a", "extract-module", fixture.dependencies)
-		if !decision.Reused || !bytes.Equal(reloaded.Outputs[0].Artifact.Content, []byte(`{"spell":"fire"}`)) || reloaded.Warnings[0].Message != "partial output" {
+		if !decision.Reused || !bytes.Equal(reloaded.Outputs[0].Artifact.Content, []byte(`{"spell":"fire"}`)) {
 			t.Fatalf("extract reload changed after loaded mutation: %#v decision=%#v", reloaded, decision)
 		}
 	})
 
 	for _, tt := range []struct {
 		name string
-		load func() (pipeline.CheckpointArtifact, []contracts.Warning, pipeline.CheckpointDecision)
+		load func() (pipeline.CheckpointArtifact, pipeline.CheckpointDecision)
 		want []byte
 	}{
-		{name: "merge", load: func() (pipeline.CheckpointArtifact, []contracts.Warning, pipeline.CheckpointDecision) {
+		{name: "merge", load: func() (pipeline.CheckpointArtifact, pipeline.CheckpointDecision) {
 			got, decision := fixture.loader.Merge("lane-a", "merge-module", fixture.dependencies)
-			return got.Output, got.Warnings, decision
+			return got.Output, decision
 		}, want: []byte(`{"spells":["fire"]}`)},
-		{name: "normalize", load: func() (pipeline.CheckpointArtifact, []contracts.Warning, pipeline.CheckpointDecision) {
+		{name: "normalize", load: func() (pipeline.CheckpointArtifact, pipeline.CheckpointDecision) {
 			got, decision := fixture.loader.Normalize("lane-a", "normalize-module", fixture.dependencies)
-			return got.Output, got.Warnings, decision
+			return got.Output, decision
 		}, want: []byte(`{"spells":["fire"],"normalized":true}`)},
 	} {
 		t.Run(tt.name, func(t *testing.T) {
-			got, warnings, decision := tt.load()
+			got, decision := tt.load()
-			if !decision.Reused || !bytes.Equal(got.Artifact.Content, tt.want) || got.Artifact.Kind != "spell" || got.Artifact.Schema.ID != "spell-schema" || got.Artifact.Schema.Version != "1" || got.Artifact.Metadata["lane"] != "lane-a" || len(got.Diagnostics) != 1 || got.Diagnostics[0].Diagnostic.ReasonCode != "normalized_record" || len(warnings) != 1 || warnings[0].ReasonCode != "review" {
+			if !decision.Reused || !bytes.Equal(got.Artifact.Content, tt.want) || got.Artifact.Kind != "spell" || got.Artifact.Schema.ID != "spell-schema" || got.Artifact.Schema.Version != "1" || got.Artifact.Metadata["lane"] != "lane-a" || len(got.Diagnostics) != 1 || got.Diagnostics[0].Diagnostic.ReasonCode != "normalized_record" {
-				t.Fatalf("%s result=%#v warnings=%#v decision=%#v", tt.name, got, warnings, decision)
+				t.Fatalf("%s result=%#v decision=%#v", tt.name, got, decision)
 			}
 
 			got.Artifact.Content[0] = 'z'
-			reloaded, warnings, decision := tt.load()
+			reloaded, decision := tt.load()
-			if !decision.Reused || !bytes.Equal(reloaded.Artifact.Content, tt.want) || warnings[0].Message != "review manually" {
+			if !decision.Reused || !bytes.Equal(reloaded.Artifact.Content, tt.want) {
-				t.Fatalf("%s reload changed after loaded mutation: %#v warnings=%#v decision=%#v", tt.name, reloaded, warnings, decision)
+				t.Fatalf("%s reload changed after loaded mutation: %#v decision=%#v", tt.name, reloaded, decision)
 			}
 		})
 	}
@@ -344,9 +341,6 @@ func TestFilesystemLoaderReadsAcceptedNormalizeWithoutStageDependencies(t *testi
 	if checkpoint.Output.Artifact.Content == nil || string(checkpoint.Output.Artifact.Content) != string(fixture.normalize.Artifact.Content) {
 		t.Fatalf("accepted normalize output = %#v, want recorded artifact", checkpoint.Output)
 	}
-	if len(checkpoint.Warnings) != 1 || checkpoint.Warnings[0].ReasonCode != "normalized" {
-		t.Fatalf("accepted normalize warnings = %#v", checkpoint.Warnings)
-	}
 }
 
 func TestFilesystemLoaderRejectsInvalidAcceptedNormalize(t *testing.T) {
@@ -409,8 +403,7 @@ func seedAcceptedNormalizeCheckpoint(t *testing.T) filesystemCheckpointFixture {
 		t.Fatal(err)
 	}
 	stepRecorder := recorder.(pipeline.StepCheckpointRecorder)
-	warnings := []contracts.Warning{{Scope: "normalize", ReasonCode: "normalized", Message: "normalized warning"}}
+	if err := stepRecorder.NormalizeSucceededForStep("step-1", "lane-a", "normalize-module", []pipeline.CheckpointFingerprint{{Name: "merge", Value: "sha256:unavailable"}}, artifact); err != nil {
-	if err := stepRecorder.NormalizeSucceededForStep("step-1", "lane-a", "normalize-module", []pipeline.CheckpointFingerprint{{Name: "merge", Value: "sha256:unavailable"}}, artifact, warnings); err != nil {
 		t.Fatal(err)
 	}
 	loader, err := NewFilesystemLoader(root, identity)
@@ -500,20 +493,18 @@ func seedFilesystemCheckpoints(t *testing.T) filesystemCheckpointFixture {
 		merge:        checkpointArtifact("merge", `{"spells":["fire"]}`),
 		normalize:    checkpointArtifact("normalize", `{"spells":["fire"],"normalized":true}`),
 		dependencies: []pipeline.CheckpointFingerprint{{Name: "source", Value: "sha256:source"}, {Name: "chunk-plan", Value: "sha256:plan"}},
-		warnings:     []contracts.Warning{{Scope: "extract", ReasonCode: "partial", Message: "partial output"}},
 		rejected:     []contracts.RejectedOutput{{Stage: "extract", LaneID: "lane-a", ModuleKey: "extract-module", ChunkID: "chunk-a", ValidatorName: "source_refs", ReasonCode: "invalid_source", Message: "source reference is invalid", AttemptCount: 1}},
 	}
 	if err := recorder.SourceSucceeded("source-module", &fixture.doc); err != nil {
 		t.Fatal(err)
 	}
-	if err := recorder.ExtractSucceeded("lane-a", "extract-module", fixture.dependencies, []pipeline.CheckpointArtifact{fixture.extract}, fixture.rejected, fixture.warnings); err != nil {
+	if err := recorder.ExtractSucceeded("lane-a", "extract-module", fixture.dependencies, []pipeline.CheckpointArtifact{fixture.extract}, fixture.rejected); err != nil {
 		t.Fatal(err)
 	}
-	mergeWarnings := []contracts.Warning{{Scope: "merge", ReasonCode: "review", Message: "review manually"}}
+	if err := recorder.MergeSucceeded("lane-a", "merge-module", fixture.dependencies, fixture.merge); err != nil {
-	if err := recorder.MergeSucceeded("lane-a", "merge-module", fixture.dependencies, fixture.merge, mergeWarnings); err != nil {
 		t.Fatal(err)
 	}
-	if err := recorder.NormalizeSucceeded("lane-a", "normalize-module", fixture.dependencies, fixture.normalize, mergeWarnings); err != nil {
+	if err := recorder.NormalizeSucceeded("lane-a", "normalize-module", fixture.dependencies, fixture.normalize); err != nil {
 		t.Fatal(err)
 	}
 	fixture.loader, err = NewFilesystemLoader(root, identity)

internal/framework/checkpoint/loader.go

@@ -86,7 +86,7 @@ func (l *FilesystemLoader) ExtractForStep(stepID, laneID, moduleKey string, depe
 	if !fingerprintsEqual(checkpointToPipelineFingerprints(manifest.OutputDigests), artifactOutputDigests(outputs)) {
 		return pipeline.ExtractCheckpoint{}, decision(pipeline.CheckpointDecisionExecuted, pipeline.CheckpointReasonArtifactDigestMismatch)
 	}
-	return pipeline.ExtractCheckpoint{Outputs: outputs, Rejected: cloneRejectedOutputs(payload.Rejected), Warnings: cloneWarnings(payload.Warnings)}, reusedDecision()
+	return pipeline.ExtractCheckpoint{Outputs: outputs, Rejected: cloneRejectedOutputs(payload.Rejected)}, reusedDecision()
 }
 
 func (l *FilesystemLoader) Merge(laneID, moduleKey string, dependencies []pipeline.CheckpointFingerprint) (pipeline.MergeCheckpoint, pipeline.CheckpointDecision) {
@@ -112,7 +112,7 @@ func (l *FilesystemLoader) MergeForStep(stepID, laneID, moduleKey string, depend
 	if !fingerprintsEqual(checkpointToPipelineFingerprints(manifest.OutputDigests), artifactOutputDigests(values)) {
 		return pipeline.MergeCheckpoint{}, decision(pipeline.CheckpointDecisionExecuted, pipeline.CheckpointReasonArtifactDigestMismatch)
 	}
-	return pipeline.MergeCheckpoint{Output: values[0], Warnings: cloneWarnings(payload.Warnings)}, reusedDecision()
+	return pipeline.MergeCheckpoint{Output: values[0]}, reusedDecision()
 }
 
 func (l *FilesystemLoader) Normalize(laneID, moduleKey string, dependencies []pipeline.CheckpointFingerprint) (pipeline.NormalizeCheckpoint, pipeline.CheckpointDecision) {
@@ -138,7 +138,7 @@ func (l *FilesystemLoader) NormalizeForStep(stepID, laneID, moduleKey string, de
 	if !fingerprintsEqual(checkpointToPipelineFingerprints(manifest.OutputDigests), artifactOutputDigests(values)) {
 		return pipeline.NormalizeCheckpoint{}, decision(pipeline.CheckpointDecisionExecuted, pipeline.CheckpointReasonArtifactDigestMismatch)
 	}
-	return pipeline.NormalizeCheckpoint{Output: values[0], Warnings: cloneWarnings(payload.Warnings)}, reusedDecision()
+	return pipeline.NormalizeCheckpoint{Output: values[0]}, reusedDecision()
 }
 
 func (l *FilesystemLoader) AcceptedNormalize(stepID, laneID, moduleKey string) (pipeline.NormalizeCheckpoint, pipeline.CheckpointDecision) {
@@ -163,7 +163,7 @@ func (l *FilesystemLoader) AcceptedNormalize(stepID, laneID, moduleKey string) (
 	if !fingerprintsEqual(checkpointToPipelineFingerprints(manifest.OutputDigests), artifactOutputDigests(values)) {
 		return pipeline.NormalizeCheckpoint{}, decision(pipeline.CheckpointDecisionExecuted, pipeline.CheckpointReasonArtifactDigestMismatch)
 	}
-	return pipeline.NormalizeCheckpoint{Output: values[0], Warnings: cloneWarnings(payload.Warnings)}, decision(pipeline.CheckpointDecisionReused, pipeline.CheckpointReasonAcceptedArtifactReused)
+	return pipeline.NormalizeCheckpoint{Output: values[0]}, decision(pipeline.CheckpointDecisionReused, pipeline.CheckpointReasonAcceptedArtifactReused)
 }
 
 func (l *FilesystemLoader) validateAcceptedNormalizeManifest(manifest StageManifest, stepID, laneID, moduleKey string) pipeline.CheckpointDecision {

internal/framework/checkpoint/recorder.go

@@ -81,18 +81,18 @@ func (r *FilesystemRecorder) ExtractRunningForStep(stepID, laneID string, module
 	return r.writeManifest(laneManifestPath("extract", stepID, laneID), ExtractLaneManifest{StageManifest: manifest})
 }
 
-func (r *FilesystemRecorder) ExtractSucceeded(laneID, moduleKey string, dependencies []pipeline.CheckpointFingerprint, outputs []pipeline.CheckpointArtifact, rejected []contracts.RejectedOutput, warnings []contracts.Warning) error {
+func (r *FilesystemRecorder) ExtractSucceeded(laneID, moduleKey string, dependencies []pipeline.CheckpointFingerprint, outputs []pipeline.CheckpointArtifact, rejected []contracts.RejectedOutput) error {
-	return r.ExtractSucceededForStep("", laneID, moduleKey, dependencies, outputs, rejected, warnings)
+	return r.ExtractSucceededForStep("", laneID, moduleKey, dependencies, outputs, rejected)
 }
 
-func (r *FilesystemRecorder) ExtractSucceededForStep(stepID, laneID, moduleKey string, dependencies []pipeline.CheckpointFingerprint, outputs []pipeline.CheckpointArtifact, rejected []contracts.RejectedOutput, warnings []contracts.Warning) error {
+func (r *FilesystemRecorder) ExtractSucceededForStep(stepID, laneID, moduleKey string, dependencies []pipeline.CheckpointFingerprint, outputs []pipeline.CheckpointArtifact, rejected []contracts.RejectedOutput) error {
-	payload := artifactExtractEnvelope{Outputs: artifactCheckpointEnvelopes(outputs), Rejected: cloneRejectedOutputs(rejected), Warnings: cloneWarnings(warnings)}
+	payload := artifactExtractEnvelope{Outputs: artifactCheckpointEnvelopes(outputs), Rejected: cloneRejectedOutputs(rejected)}
 	if err := r.writePayload(lanePayloadPath("extract", stepID, laneID, "outputs.json"), payload); err != nil {
 		return err
 	}
 	manifest := r.laneManifest(StageExtract, statusForRejected(rejected), stepID, laneID, moduleKey, dependencies)
 	manifest.OutputDigests = checkpointFingerprints(artifactOutputDigests(outputs))
-	manifest.ValidationStatus = validationStatusString(warnings, rejected)
+	manifest.ValidationStatus = validationStatusString(rejected)
 	manifest.Rejections = rejectionSummaries(rejected)
 	manifest.CompletedAt = timePtr(r.timestamp())
 	return r.writeManifest(laneManifestPath("extract", stepID, laneID), ExtractLaneManifest{StageManifest: manifest, ChunkCount: len(outputs) + len(rejected), OutputCount: len(outputs)})
@@ -119,17 +119,17 @@ func (r *FilesystemRecorder) MergeRunningForStep(stepID, laneID string, moduleKe
 	return r.writeManifest(laneManifestPath("merge", stepID, laneID), MergeLaneManifest{StageManifest: manifest})
 }
 
-func (r *FilesystemRecorder) MergeSucceeded(laneID, moduleKey string, dependencies []pipeline.CheckpointFingerprint, output pipeline.CheckpointArtifact, warnings []contracts.Warning) error {
+func (r *FilesystemRecorder) MergeSucceeded(laneID, moduleKey string, dependencies []pipeline.CheckpointFingerprint, output pipeline.CheckpointArtifact) error {
-	return r.MergeSucceededForStep("", laneID, moduleKey, dependencies, output, warnings)
+	return r.MergeSucceededForStep("", laneID, moduleKey, dependencies, output)
 }
 
-func (r *FilesystemRecorder) MergeSucceededForStep(stepID, laneID, moduleKey string, dependencies []pipeline.CheckpointFingerprint, output pipeline.CheckpointArtifact, warnings []contracts.Warning) error {
+func (r *FilesystemRecorder) MergeSucceededForStep(stepID, laneID, moduleKey string, dependencies []pipeline.CheckpointFingerprint, output pipeline.CheckpointArtifact) error {
-	if err := r.writePayload(lanePayloadPath("merge", stepID, laneID, "output.json"), artifactSingleEnvelope{Output: artifactCheckpointEnvelopeFromOutput(output), Warnings: cloneWarnings(warnings)}); err != nil {
+	if err := r.writePayload(lanePayloadPath("merge", stepID, laneID, "output.json"), artifactSingleEnvelope{Output: artifactCheckpointEnvelopeFromOutput(output)}); err != nil {
 		return err
 	}
 	manifest := r.laneManifest(StageMerge, StatusSucceeded, stepID, laneID, moduleKey, dependencies)
 	manifest.OutputDigests = checkpointFingerprints(artifactOutputDigests([]pipeline.CheckpointArtifact{output}))
-	manifest.ValidationStatus = validationStatusString(warnings, nil)
+	manifest.ValidationStatus = validationStatusString(nil)
 	manifest.CompletedAt = timePtr(r.timestamp())
 	return r.writeManifest(laneManifestPath("merge", stepID, laneID), MergeLaneManifest{StageManifest: manifest, InputCount: len(dependencies)})
 }
@@ -167,17 +167,17 @@ func (r *FilesystemRecorder) NormalizeRunningForStep(stepID, laneID string, modu
 	return r.writeManifest(laneManifestPath("normalize", stepID, laneID), NormalizeLaneManifest{StageManifest: manifest})
 }
 
-func (r *FilesystemRecorder) NormalizeSucceeded(laneID, moduleKey string, dependencies []pipeline.CheckpointFingerprint, output pipeline.CheckpointArtifact, warnings []contracts.Warning) error {
+func (r *FilesystemRecorder) NormalizeSucceeded(laneID, moduleKey string, dependencies []pipeline.CheckpointFingerprint, output pipeline.CheckpointArtifact) error {
-	return r.NormalizeSucceededForStep("", laneID, moduleKey, dependencies, output, warnings)
+	return r.NormalizeSucceededForStep("", laneID, moduleKey, dependencies, output)
 }
 
-func (r *FilesystemRecorder) NormalizeSucceededForStep(stepID, laneID, moduleKey string, dependencies []pipeline.CheckpointFingerprint, output pipeline.CheckpointArtifact, warnings []contracts.Warning) error {
+func (r *FilesystemRecorder) NormalizeSucceededForStep(stepID, laneID, moduleKey string, dependencies []pipeline.CheckpointFingerprint, output pipeline.CheckpointArtifact) error {
-	if err := r.writePayload(lanePayloadPath("normalize", stepID, laneID, "output.json"), artifactSingleEnvelope{Output: artifactCheckpointEnvelopeFromOutput(output), Warnings: cloneWarnings(warnings)}); err != nil {
+	if err := r.writePayload(lanePayloadPath("normalize", stepID, laneID, "output.json"), artifactSingleEnvelope{Output: artifactCheckpointEnvelopeFromOutput(output)}); err != nil {
 		return err
 	}
 	manifest := r.laneManifest(StageNormalize, StatusSucceeded, stepID, laneID, moduleKey, dependencies)
 	manifest.OutputDigests = checkpointFingerprints(artifactOutputDigests([]pipeline.CheckpointArtifact{output}))
-	manifest.ValidationStatus = validationStatusString(warnings, nil)
+	manifest.ValidationStatus = validationStatusString(nil)
 	manifest.CompletedAt = timePtr(r.timestamp())
 	return r.writeManifest(laneManifestPath("normalize", stepID, laneID), NormalizeLaneManifest{StageManifest: manifest, InputCount: len(dependencies)})
 }
@@ -253,7 +253,6 @@ type binaryEnvelope struct {
 	ContentDigest string         `json:"content_digest,omitempty"`
 	MediaType     string         `json:"media_type,omitempty"`
 	Metadata      map[string]any `json:"metadata,omitempty"`
-	Warnings      []contracts.Warning `json:"warnings,omitempty"`
 }
 
 type artifactCheckpointEnvelope struct {
@@ -272,17 +271,15 @@ type artifactCheckpointEnvelope struct {
 type artifactExtractEnvelope struct {
 	Outputs  []artifactCheckpointEnvelope `json:"outputs"`
 	Rejected []contracts.RejectedOutput   `json:"rejected,omitempty"`
-	Warnings []contracts.Warning          `json:"warnings,omitempty"`
 }
 type artifactSingleEnvelope struct {
 	Output artifactCheckpointEnvelope `json:"output"`
-	Warnings []contracts.Warning        `json:"warnings,omitempty"`
 }
 
 func artifactCheckpointEnvelopeFromOutput(output pipeline.CheckpointArtifact) artifactCheckpointEnvelope {
 	schema := contracts.CloneArtifactSchema(output.Artifact.Schema)
 	schema.JSONSchema = nil
-	return artifactCheckpointEnvelope{LaneID: output.LaneID, ModuleKey: output.ModuleKey, SourceID: output.SourceID, ChunkID: output.ChunkID, ChunkIndex: output.ChunkIndex, ChunkRef: output.ChunkRef, Kind: output.Artifact.Kind, Schema: schema, SchemaDigest: output.SchemaDigest, Content: binaryEnvelopeFromContent(output.Artifact.Content, output.Artifact.MediaType, output.Artifact.Metadata, nil), Diagnostics: cloneCheckpointDiagnostics(output.Diagnostics)}
+	return artifactCheckpointEnvelope{LaneID: output.LaneID, ModuleKey: output.ModuleKey, SourceID: output.SourceID, ChunkID: output.ChunkID, ChunkIndex: output.ChunkIndex, ChunkRef: output.ChunkRef, Kind: output.Artifact.Kind, Schema: schema, SchemaDigest: output.SchemaDigest, Content: binaryEnvelopeFromContent(output.Artifact.Content, output.Artifact.MediaType, output.Artifact.Metadata), Diagnostics: cloneCheckpointDiagnostics(output.Diagnostics)}
 }
 func artifactCheckpointEnvelopes(outputs []pipeline.CheckpointArtifact) []artifactCheckpointEnvelope {
 	if len(outputs) == 0 {
@@ -316,13 +313,12 @@ func artifactOutputDigests(outputs []pipeline.CheckpointArtifact) []pipeline.Che
 	return normalizeFingerprints(values)
 }
 
-func binaryEnvelopeFromContent(content []byte, mediaType string, metadata map[string]any, warnings []contracts.Warning) binaryEnvelope {
+func binaryEnvelopeFromContent(content []byte, mediaType string, metadata map[string]any) binaryEnvelope {
 	return binaryEnvelope{
 		ContentBase64: base64.StdEncoding.EncodeToString(content),
 		ContentDigest: contentDigest(content),
 		MediaType:     mediaType,
 		Metadata:      cloneMetadata(metadata),
-		Warnings:      cloneWarnings(warnings),
 	}
 }
 
@@ -349,13 +345,6 @@ func cloneSourceUnits(units []source.SourceUnit) []source.SourceUnit {
 	return out
 }
 
-func cloneWarnings(warnings []contracts.Warning) []contracts.Warning {
-	if len(warnings) == 0 {
-		return nil
-	}
-	return append([]contracts.Warning(nil), warnings...)
-}
-
 func cloneRejectedOutputs(rejected []contracts.RejectedOutput) []contracts.RejectedOutput {
 	if len(rejected) == 0 {
 		return nil
@@ -476,13 +465,10 @@ func statusForRejected(rejected []contracts.RejectedOutput) StageStatus {
 	return StatusSucceeded
 }
 
-func validationStatusString(warnings []contracts.Warning, rejected []contracts.RejectedOutput) string {
+func validationStatusString(rejected []contracts.RejectedOutput) string {
 	if len(rejected) > 0 {
 		return "rejected"
 	}
-	if len(warnings) > 0 {
-		return "approved_with_warnings"
-	}
 	return "approved"
 }
 

internal/framework/checkpoint/recorder_test.go

@@ -17,7 +17,7 @@ func TestRootBasedRecorderOutputIsReusable(t *testing.T) {
 	if err != nil {
 		t.Fatal(err)
 	}
-	if err := recorder.ExtractSucceeded("lane", "module", nil, nil, nil, nil); err != nil {
+	if err := recorder.ExtractSucceeded("lane", "module", nil, nil, nil); err != nil {
 		t.Fatal(err)
 	}
 	loader, err := NewFilesystemLoader(root, identity)
@@ -44,7 +44,7 @@ func TestStepAwareRecorderAndLoaderIsolateLaneState(t *testing.T) {
 	if err != nil {
 		t.Fatal(err)
 	}
-	if err := recorder.(pipeline.StepCheckpointRecorder).ExtractSucceededForStep("step-a", "lane", "module", nil, nil, nil, nil); err != nil {
+	if err := recorder.(pipeline.StepCheckpointRecorder).ExtractSucceededForStep("step-a", "lane", "module", nil, nil, nil); err != nil {
 		t.Fatal(err)
 	}
 	loader, err := NewFilesystemLoader(root, identity)
@@ -87,7 +87,7 @@ func TestStepAwareCheckpointPreservesDistinctDotIdentities(t *testing.T) {
 			LaneID: "lane", ModuleKey: "normalize-module", SourceID: "source", ChunkID: "chunk", ChunkRef: source.SourceRef{SourceID: "source", StartUnitID: 1, EndUnitID: 1}, SchemaDigest: "sha256:schema",
 			Artifact: contracts.SerializedArtifact{Kind: "kind", Schema: contracts.ArtifactSchema{ID: "schema", Name: "Schema", Version: "1"}, MediaType: "application/json", Content: []byte(test.content)},
 		}
-		if err := stepRecorder.NormalizeSucceededForStep(test.stepID, "lane", "normalize-module", nil, artifact, nil); err != nil {
+		if err := stepRecorder.NormalizeSucceededForStep(test.stepID, "lane", "normalize-module", nil, artifact); err != nil {
 			t.Fatalf("record %q: %v", test.stepID, err)
 		}
 	}

internal/framework/chunkplan/store_test.go

@@ -498,7 +498,6 @@ func testRecord(t *testing.T, value int) pipeline.ChunkPlanRecord {
 			References: []artifacts.ReferenceProvenance{{Stage: "chunk", SlotName: "guide", OriginType: "file", OriginURI: "file:///guide.txt", Digest: "sha256:reference"}},
 			Metadata:   map[string]any{"prompt_id": "test/prompt", "enabled": true},
 		},
-		Warnings: []contracts.Warning{{Scope: "chunk/test", ReasonCode: "observed", Message: "warning"}},
 		Diagnostics: []contracts.ProducerDiagnostic{{
 			Disposition:     contracts.DiagnosticDispositionWarning,
 			Category:        contracts.DiagnosticCategoryConfiguration,

internal/framework/contracts/contracts.go

@@ -163,7 +163,6 @@ type ChunkRequest struct {
 
 type ChunkPlanResult struct {
 	Plan           source.ChunkPlan     `json:"plan"`
-	Warnings       []Warning            `json:"warnings,omitempty"`
 	Diagnostics    []ProducerDiagnostic `json:"diagnostics,omitempty"`
 	ModelCandidate *ModelCandidate      `json:"-"`
 }
@@ -289,21 +288,13 @@ type ValidationResult struct {
 	Message                string               `json:"message,omitempty"`
 	CorrectionGuidance     string               `json:"-"`
 	DiagnosticArtifactPath string               `json:"diagnostic_artifact_path,omitempty"`
-	Warnings               []Warning            `json:"warnings,omitempty"`
 	Diagnostics            []ProducerDiagnostic `json:"diagnostics,omitempty"`
 }
 
-type Warning struct {
-	Scope      string `json:"scope,omitempty"`
-	ReasonCode string `json:"reason_code"`
-	Message    string `json:"message"`
-}
-
 type OutputRequest struct {
 	Manifest                       artifacts.RunManifest `json:"manifest"`
 	NormalizeOutputs               []SerializedOutput    `json:"normalize_outputs,omitempty"`
 	Rejected                       []RejectedOutput      `json:"rejected,omitempty"`
-	Warnings                       []Warning             `json:"warnings,omitempty"`
 	Diagnostics                    DiagnosticCollection  `json:"diagnostics,omitempty"`
 	LLMProfile                     string                `json:"llm_profile,omitempty"`
 	StructuredOutputRepairAttempts *int                  `json:"structured_output_repair_attempts,omitempty"`

internal/framework/contracts/typed_pipeline.go

@@ -48,7 +48,6 @@ type TypedExtractionRequest struct {
 
 type TypedExtractionResult[T any] struct {
 	Value          T
-	Warnings       []Warning
 	Diagnostics    []ProducerDiagnostic
 	ModelCandidate *ModelCandidate
 }
@@ -74,7 +73,6 @@ type TypedMergeRequest[T any] struct {
 
 type TypedMergeResult[T any] struct {
 	Value          T
-	Warnings       []Warning
 	Diagnostics    []ProducerDiagnostic
 	ModelCandidate *ModelCandidate
 }
@@ -99,7 +97,6 @@ type TypedNormalizeRequest[T any] struct {
 
 type TypedNormalizeResult[T any] struct {
 	Value          T
-	Warnings       []Warning
 	Diagnostics    []ProducerDiagnostic
 	Retry          *NormalizeRetry
 	ModelCandidate *ModelCandidate
@@ -117,7 +114,6 @@ const (
 type NormalizeRetry struct {
 	ReasonCode          string
 	Message             string
-	FallbackWarnings    []Warning
 	FallbackDiagnostics []ProducerDiagnostic
 }
 

internal/framework/pipeline/checkpoint.go

@@ -28,14 +28,14 @@ type CheckpointRecorder interface {
 	SourceSucceeded(moduleKey string, doc *source.SourceDocument) error
 	SourceFailed(moduleKey string, err error) error
 	ExtractRunning(laneID string, moduleKey string, dependencies []CheckpointFingerprint) error
-	ExtractSucceeded(laneID string, moduleKey string, dependencies []CheckpointFingerprint, outputs []CheckpointArtifact, rejected []contracts.RejectedOutput, warnings []contracts.Warning) error
+	ExtractSucceeded(laneID string, moduleKey string, dependencies []CheckpointFingerprint, outputs []CheckpointArtifact, rejected []contracts.RejectedOutput) error
 	ExtractFailed(laneID string, moduleKey string, dependencies []CheckpointFingerprint, err error) error
 	MergeRunning(laneID string, moduleKey string, dependencies []CheckpointFingerprint) error
-	MergeSucceeded(laneID string, moduleKey string, dependencies []CheckpointFingerprint, output CheckpointArtifact, warnings []contracts.Warning) error
+	MergeSucceeded(laneID string, moduleKey string, dependencies []CheckpointFingerprint, output CheckpointArtifact) error
 	MergeRejected(laneID string, moduleKey string, dependencies []CheckpointFingerprint, rejected contracts.RejectedOutput) error
 	MergeFailed(laneID string, moduleKey string, dependencies []CheckpointFingerprint, err error) error
 	NormalizeRunning(laneID string, moduleKey string, dependencies []CheckpointFingerprint) error
-	NormalizeSucceeded(laneID string, moduleKey string, dependencies []CheckpointFingerprint, output CheckpointArtifact, warnings []contracts.Warning) error
+	NormalizeSucceeded(laneID string, moduleKey string, dependencies []CheckpointFingerprint, output CheckpointArtifact) error
 	NormalizeRejected(laneID string, moduleKey string, dependencies []CheckpointFingerprint, rejected contracts.RejectedOutput) error
 	NormalizeFailed(laneID string, moduleKey string, dependencies []CheckpointFingerprint, err error) error
 }
@@ -45,14 +45,14 @@ type CheckpointRecorder interface {
 // remain available for callers that do not have step context.
 type StepCheckpointRecorder interface {
 	ExtractRunningForStep(stepID, laneID string, moduleKey string, dependencies []CheckpointFingerprint) error
-	ExtractSucceededForStep(stepID, laneID string, moduleKey string, dependencies []CheckpointFingerprint, outputs []CheckpointArtifact, rejected []contracts.RejectedOutput, warnings []contracts.Warning) error
+	ExtractSucceededForStep(stepID, laneID string, moduleKey string, dependencies []CheckpointFingerprint, outputs []CheckpointArtifact, rejected []contracts.RejectedOutput) error
 	ExtractFailedForStep(stepID, laneID string, moduleKey string, dependencies []CheckpointFingerprint, err error) error
 	MergeRunningForStep(stepID, laneID string, moduleKey string, dependencies []CheckpointFingerprint) error
-	MergeSucceededForStep(stepID, laneID string, moduleKey string, dependencies []CheckpointFingerprint, output CheckpointArtifact, warnings []contracts.Warning) error
+	MergeSucceededForStep(stepID, laneID string, moduleKey string, dependencies []CheckpointFingerprint, output CheckpointArtifact) error
 	MergeRejectedForStep(stepID, laneID string, moduleKey string, dependencies []CheckpointFingerprint, rejected contracts.RejectedOutput) error
 	MergeFailedForStep(stepID, laneID string, moduleKey string, dependencies []CheckpointFingerprint, err error) error
 	NormalizeRunningForStep(stepID, laneID string, moduleKey string, dependencies []CheckpointFingerprint) error
-	NormalizeSucceededForStep(stepID, laneID string, moduleKey string, dependencies []CheckpointFingerprint, output CheckpointArtifact, warnings []contracts.Warning) error
+	NormalizeSucceededForStep(stepID, laneID string, moduleKey string, dependencies []CheckpointFingerprint, output CheckpointArtifact) error
 	NormalizeRejectedForStep(stepID, laneID string, moduleKey string, dependencies []CheckpointFingerprint, rejected contracts.RejectedOutput) error
 	NormalizeFailedForStep(stepID, laneID string, moduleKey string, dependencies []CheckpointFingerprint, err error) error
 }
@@ -293,16 +293,13 @@ type CheckpointDiagnostic struct {
 type ExtractCheckpoint struct {
 	Outputs  []CheckpointArtifact
 	Rejected []contracts.RejectedOutput
-	Warnings []contracts.Warning
 }
 
 type MergeCheckpoint struct {
 	Output CheckpointArtifact
-	Warnings []contracts.Warning
 }
 type NormalizeCheckpoint struct {
 	Output CheckpointArtifact
-	Warnings []contracts.Warning
 }
 
 type CheckpointLoader interface {
@@ -335,14 +332,14 @@ func (noopCheckpointRecorder) SourceFailed(string, error) error
 func (noopCheckpointRecorder) ExtractRunning(string, string, []CheckpointFingerprint) error {
 	return nil
 }
-func (noopCheckpointRecorder) ExtractSucceeded(string, string, []CheckpointFingerprint, []CheckpointArtifact, []contracts.RejectedOutput, []contracts.Warning) error {
+func (noopCheckpointRecorder) ExtractSucceeded(string, string, []CheckpointFingerprint, []CheckpointArtifact, []contracts.RejectedOutput) error {
 	return nil
 }
 func (noopCheckpointRecorder) ExtractFailed(string, string, []CheckpointFingerprint, error) error {
 	return nil
 }
 func (noopCheckpointRecorder) MergeRunning(string, string, []CheckpointFingerprint) error { return nil }
-func (noopCheckpointRecorder) MergeSucceeded(string, string, []CheckpointFingerprint, CheckpointArtifact, []contracts.Warning) error {
+func (noopCheckpointRecorder) MergeSucceeded(string, string, []CheckpointFingerprint, CheckpointArtifact) error {
 	return nil
 }
 func (noopCheckpointRecorder) MergeRejected(string, string, []CheckpointFingerprint, contracts.RejectedOutput) error {
@@ -354,7 +351,7 @@ func (noopCheckpointRecorder) MergeFailed(string, string, []CheckpointFingerprin
 func (noopCheckpointRecorder) NormalizeRunning(string, string, []CheckpointFingerprint) error {
 	return nil
 }
-func (noopCheckpointRecorder) NormalizeSucceeded(string, string, []CheckpointFingerprint, CheckpointArtifact, []contracts.Warning) error {
+func (noopCheckpointRecorder) NormalizeSucceeded(string, string, []CheckpointFingerprint, CheckpointArtifact) error {
 	return nil
 }
 func (noopCheckpointRecorder) NormalizeRejected(string, string, []CheckpointFingerprint, contracts.RejectedOutput) error {
@@ -387,11 +384,11 @@ func checkpointExtractRunning(recorder CheckpointRecorder, stepID, laneID, modul
 	}
 	return recorder.ExtractRunning(laneID, moduleKey, deps)
 }
-func checkpointExtractSucceeded(recorder CheckpointRecorder, stepID, laneID, moduleKey string, deps []CheckpointFingerprint, outputs []CheckpointArtifact, rejected []contracts.RejectedOutput, warnings []contracts.Warning) error {
+func checkpointExtractSucceeded(recorder CheckpointRecorder, stepID, laneID, moduleKey string, deps []CheckpointFingerprint, outputs []CheckpointArtifact, rejected []contracts.RejectedOutput) error {
 	if stepAware, ok := recorder.(StepCheckpointRecorder); ok {
-		return stepAware.ExtractSucceededForStep(stepID, laneID, moduleKey, deps, outputs, rejected, warnings)
+		return stepAware.ExtractSucceededForStep(stepID, laneID, moduleKey, deps, outputs, rejected)
 	}
-	return recorder.ExtractSucceeded(laneID, moduleKey, deps, outputs, rejected, warnings)
+	return recorder.ExtractSucceeded(laneID, moduleKey, deps, outputs, rejected)
 }
 func checkpointExtractFailed(recorder CheckpointRecorder, stepID, laneID, moduleKey string, deps []CheckpointFingerprint, err error) error {
 	if stepAware, ok := recorder.(StepCheckpointRecorder); ok {
@@ -405,11 +402,11 @@ func checkpointMergeRunning(recorder CheckpointRecorder, stepID, laneID, moduleK
 	}
 	return recorder.MergeRunning(laneID, moduleKey, deps)
 }
-func checkpointMergeSucceeded(recorder CheckpointRecorder, stepID, laneID, moduleKey string, deps []CheckpointFingerprint, output CheckpointArtifact, warnings []contracts.Warning) error {
+func checkpointMergeSucceeded(recorder CheckpointRecorder, stepID, laneID, moduleKey string, deps []CheckpointFingerprint, output CheckpointArtifact) error {
 	if stepAware, ok := recorder.(StepCheckpointRecorder); ok {
-		return stepAware.MergeSucceededForStep(stepID, laneID, moduleKey, deps, output, warnings)
+		return stepAware.MergeSucceededForStep(stepID, laneID, moduleKey, deps, output)
 	}
-	return recorder.MergeSucceeded(laneID, moduleKey, deps, output, warnings)
+	return recorder.MergeSucceeded(laneID, moduleKey, deps, output)
 }
 func checkpointMergeRejected(recorder CheckpointRecorder, stepID, laneID, moduleKey string, deps []CheckpointFingerprint, rejected contracts.RejectedOutput) error {
 	if stepAware, ok := recorder.(StepCheckpointRecorder); ok {
@@ -429,11 +426,11 @@ func checkpointNormalizeRunning(recorder CheckpointRecorder, stepID, laneID, mod
 	}
 	return recorder.NormalizeRunning(laneID, moduleKey, deps)
 }
-func checkpointNormalizeSucceeded(recorder CheckpointRecorder, stepID, laneID, moduleKey string, deps []CheckpointFingerprint, output CheckpointArtifact, warnings []contracts.Warning) error {
+func checkpointNormalizeSucceeded(recorder CheckpointRecorder, stepID, laneID, moduleKey string, deps []CheckpointFingerprint, output CheckpointArtifact) error {
 	if stepAware, ok := recorder.(StepCheckpointRecorder); ok {
-		return stepAware.NormalizeSucceededForStep(stepID, laneID, moduleKey, deps, output, warnings)
+		return stepAware.NormalizeSucceededForStep(stepID, laneID, moduleKey, deps, output)
 	}
-	return recorder.NormalizeSucceeded(laneID, moduleKey, deps, output, warnings)
+	return recorder.NormalizeSucceeded(laneID, moduleKey, deps, output)
 }
 func checkpointNormalizeRejected(recorder CheckpointRecorder, stepID, laneID, moduleKey string, deps []CheckpointFingerprint, rejected contracts.RejectedOutput) error {
 	if stepAware, ok := recorder.(StepCheckpointRecorder); ok {

internal/framework/pipeline/chunk_plan_store.go

@@ -24,7 +24,6 @@ type ChunkPlanRecord struct {
 	PlanDigest    string                         `json:"plan_digest"`
 	Plan          source.ChunkPlan               `json:"plan"`
 	Producer      ChunkPlanProducer              `json:"producer"`
-	Warnings      []contracts.Warning            `json:"warnings,omitempty"`
 	Diagnostics   []contracts.ProducerDiagnostic `json:"diagnostics,omitempty"`
 	CreatedAt     time.Time                      `json:"created_at"`
 }

internal/framework/pipeline/debug.go

@@ -56,7 +56,6 @@ type debugBinaryEnvelope struct {
 	ContentDigest string         `json:"content_digest,omitempty"`
 	MediaType     string         `json:"media_type,omitempty"`
 	Metadata      map[string]any `json:"metadata,omitempty"`
-	Warnings      []contracts.Warning `json:"warnings,omitempty"`
 }
 
 type debugSourceInput struct {
@@ -483,14 +482,13 @@ func writeProducerTerminalDebug(recorder DebugRecorder, name string, terminal pr
 	})
 }
 
-func debugContentEnvelope(content []byte, mediaType string, metadata map[string]any, warnings []contracts.Warning) debugBinaryEnvelope {
+func debugContentEnvelope(content []byte, mediaType string, metadata map[string]any, _ any) debugBinaryEnvelope {
 	content = redactSecretBytes(content)
 	return debugBinaryEnvelope{
 		ContentBase64: base64.StdEncoding.EncodeToString(content),
 		ContentDigest: debugContentDigest(content),
 		MediaType:     mediaType,
 		Metadata:      redactSensitiveMap(metadata),
-		Warnings:      cloneWarnings(warnings),
 	}
 }
 
@@ -731,20 +729,9 @@ func debugValidationResultEnvelope(result contracts.ValidationResult) contracts.
 	result.Message = string(redactSecretBytes([]byte(result.Message)))
 	result.CorrectionGuidance = ""
 	result.DiagnosticArtifactPath = string(redactSecretBytes([]byte(result.DiagnosticArtifactPath)))
-	for i := range result.Warnings {
-		result.Warnings[i].Message = string(redactSecretBytes([]byte(result.Warnings[i].Message)))
-	}
 	return result
 }
 
-func debugWarningEnvelopes(warnings []contracts.Warning) []contracts.Warning {
-	out := cloneWarnings(warnings)
-	for i := range out {
-		out[i].Message = string(redactSecretBytes([]byte(out[i].Message)))
-	}
-	return out
-}
-
 func debugRejectedOutputEnvelope(rejected contracts.RejectedOutput) contracts.RejectedOutput {
 	rejected.Message = string(redactSecretBytes([]byte(rejected.Message)))
 	rejected.DiagnosticArtifactPath = string(redactSecretBytes([]byte(rejected.DiagnosticArtifactPath)))

internal/framework/pipeline/diagnostics.go

@@ -107,20 +107,6 @@ func appendDiagnosticGroups(output *RunOutput, groups []contracts.DiagnosticGrou
 	}
 	cloned := contracts.CloneDiagnosticCollection(contracts.DiagnosticCollection{Groups: groups}).Groups
 	output.diagnosticGroups = append(output.diagnosticGroups, cloned...)
-	seen := make(map[contracts.Warning]struct{}, len(output.Warnings))
-	for _, warning := range output.Warnings {
-		seen[warning] = struct{}{}
-	}
-	for _, group := range cloned {
-		for _, sample := range group.Samples {
-			warning := contracts.Warning{Scope: sample.Scope, ReasonCode: group.ReasonCode, Message: sample.Message}
-			if _, exists := seen[warning]; exists {
-				continue
-			}
-			output.Warnings = append(output.Warnings, warning)
-			seen[warning] = struct{}{}
-		}
-	}
 }
 
 func finalizeDiagnostics(output *RunOutput) error {

internal/framework/pipeline/diagnostics_test.go

@@ -46,8 +46,8 @@ func TestTerminalDiagnosticGroupsPreserveValidatorOrigin(t *testing.T) {
 	}
 }
 
-func TestAppendDiagnosticGroupsProjectsOnlyMissingLegacyWarnings(t *testing.T) {
+func TestAppendDiagnosticGroupsRetainsOnlyStructuredDiagnostics(t *testing.T) {
-	output := RunOutput{Warnings: []contracts.Warning{{Scope: "spells[0]", ReasonCode: "source_unrelated", Message: "not found"}}}
+	output := RunOutput{}
 	appendDiagnosticGroups(&output, []contracts.DiagnosticGroup{{
 		Disposition:     contracts.DiagnosticDispositionAdvisory,
 		Category:        contracts.DiagnosticCategoryDataQuality,
@@ -56,9 +56,6 @@ func TestAppendDiagnosticGroupsProjectsOnlyMissingLegacyWarnings(t *testing.T) {
 		OccurrenceCount: 2,
 		Samples:         []contracts.DiagnosticSample{{Scope: "spells[0]", Message: "not found"}, {Scope: "spells[1]", Message: "also not found"}},
 	}})
-	if len(output.Warnings) != 2 {
-		t.Fatalf("legacy warnings = %#v, want one original and one projected record", output.Warnings)
-	}
 	if err := finalizeDiagnostics(&output); err != nil {
 		t.Fatalf("finalizeDiagnostics() error = %v", err)
 	}

internal/framework/pipeline/extractor_registry.go

@@ -71,7 +71,7 @@ func RegisterExtractorBuilder[T any](registry *ExtractorRegistry, spec ModuleSpe
 		if err != nil {
 			return erasedTypedResult{}, fmt.Errorf("clone extraction model candidate: %w", err)
 		}
-		return erasedTypedResult{Value: result.Value, Warnings: cloneWarnings(result.Warnings), Diagnostics: contracts.CloneProducerDiagnostics(result.Diagnostics), ModelCandidate: candidate}, nil
+		return erasedTypedResult{Value: result.Value, Diagnostics: contracts.CloneProducerDiagnostics(result.Diagnostics), ModelCandidate: candidate}, nil
 	}}
 	if registry.typedEntries == nil {
 		registry.typedEntries = map[string]typedExtractorEntry{}

internal/framework/pipeline/merger_registry.go

@@ -97,7 +97,7 @@ func RegisterMergerBuilder[T any](registry *MergerRegistry, spec ModuleSpec, val
 			if err != nil {
 				return erasedTypedResult{}, fmt.Errorf("clone merge model candidate: %w", err)
 			}
-			return erasedTypedResult{Value: result.Value, Warnings: cloneWarnings(result.Warnings), Diagnostics: contracts.CloneProducerDiagnostics(result.Diagnostics), ModelCandidate: candidate}, nil
+			return erasedTypedResult{Value: result.Value, Diagnostics: contracts.CloneProducerDiagnostics(result.Diagnostics), ModelCandidate: candidate}, nil
 		},
 	}
 	return nil

internal/framework/pipeline/normalizer_registry.go

@@ -88,7 +88,7 @@ func RegisterNormalizerBuilder[T any](registry *NormalizerRegistry, spec ModuleS
 			if err != nil {
 				return erasedTypedResult{}, fmt.Errorf("clone normalize model candidate: %w", err)
 			}
-			return erasedTypedResult{Value: result.Value, Warnings: cloneWarnings(result.Warnings), Diagnostics: contracts.CloneProducerDiagnostics(result.Diagnostics), Retry: cloneNormalizeRetry(result.Retry), ModelCandidate: candidate}, nil
+			return erasedTypedResult{Value: result.Value, Diagnostics: contracts.CloneProducerDiagnostics(result.Diagnostics), Retry: cloneNormalizeRetry(result.Retry), ModelCandidate: candidate}, nil
 		},
 	}
 	return nil
@@ -101,7 +101,6 @@ func cloneNormalizeRetry(retry *contracts.NormalizeRetry) *contracts.NormalizeRe
 	return &contracts.NormalizeRetry{
 		ReasonCode:          retry.ReasonCode,
 		Message:             retry.Message,
-		FallbackWarnings:    cloneWarnings(retry.FallbackWarnings),
 		FallbackDiagnostics: contracts.CloneProducerDiagnostics(retry.FallbackDiagnostics),
 	}
 }

internal/framework/pipeline/normalizer_registry_test.go

@@ -8,26 +8,23 @@ import (
 )
 
 type retryingNotesNormalizer struct {
-	warnings []contracts.Warning
 	retry *contracts.NormalizeRetry
 }
 
 func (retryingNotesNormalizer) Key() string                               { return "test/retry-normalize" }
 func (retryingNotesNormalizer) ReferenceSlots() []contracts.ReferenceSlot { return nil }
 func (n retryingNotesNormalizer) Normalize(_ context.Context, req contracts.TypedNormalizeRequest[codecNotes]) (contracts.TypedNormalizeResult[codecNotes], error) {
-	return contracts.TypedNormalizeResult[codecNotes]{Value: req.MergeOutput.Value, Warnings: n.warnings, Retry: n.retry}, nil
+	return contracts.TypedNormalizeResult[codecNotes]{Value: req.MergeOutput.Value, Retry: n.retry}, nil
 }
 
 func TestNormalizerRegistryErasureClonesRetryDirective(t *testing.T) {
-	warnings := []contracts.Warning{{Scope: "attempt", ReasonCode: "ordinary", Message: "ordinary warning"}}
 	retry := &contracts.NormalizeRetry{
 		ReasonCode: "retryable",
 		Message:    "safe fallback available",
-		FallbackWarnings: []contracts.Warning{{Scope: "fallback", ReasonCode: "omitted", Message: "fallback warning"}},
 	}
 	registry := NewNormalizerRegistry()
 	if err := RegisterNormalizer(registry, ModuleSpec{Key: "test/retry-normalize", Stage: StageNormalize, ExecutionClass: contracts.ExecutionClassDeterministic, ArtifactKind: "test/notes"}, func() (contracts.Normalizer[codecNotes], error) {
-		return retryingNotesNormalizer{warnings: warnings, retry: retry}, nil
+		return retryingNotesNormalizer{retry: retry}, nil
 	}); err != nil {
 		t.Fatalf("RegisterNormalizer() error = %v", err)
 	}
@@ -43,10 +40,8 @@ func TestNormalizerRegistryErasureClonesRetryDirective(t *testing.T) {
 	if err != nil {
 		t.Fatalf("normalize() error = %v", err)
 	}
-	warnings[0].Message = "mutated"
 	retry.Message = "mutated"
-	retry.FallbackWarnings[0].Message = "mutated"
+	if result.Retry == nil || result.Retry.Message != "safe fallback available" {
-	if result.Retry == nil || result.Warnings[0].Message != "ordinary warning" || result.Retry.Message != "safe fallback available" || result.Retry.FallbackWarnings[0].Message != "fallback warning" {
+		t.Fatalf("erased retry result = %#v, want independent retry data", result)
-		t.Fatalf("erased retry result = %#v, want independent warning data", result)
 	}
 }

internal/framework/pipeline/producer_attempts.go

@@ -52,7 +52,6 @@ type producerAttemptRequest struct {
 // the current value as a safe fallback if its shared budget is exhausted.
 // Artifact-specific adapters are responsible for validating and populating it.
 type producerRetryDirective struct {
-	FallbackWarnings    []contracts.Warning
 	FallbackDiagnostics []contracts.ProducerDiagnostic
 }
 
@@ -60,7 +59,7 @@ func (directive *producerRetryDirective) clone() *producerRetryDirective {
 	if directive == nil {
 		return nil
 	}
-	return &producerRetryDirective{FallbackWarnings: cloneWarnings(directive.FallbackWarnings), FallbackDiagnostics: contracts.CloneProducerDiagnostics(directive.FallbackDiagnostics)}
+	return &producerRetryDirective{FallbackDiagnostics: contracts.CloneProducerDiagnostics(directive.FallbackDiagnostics)}
 }
 
 // producerAttemptOutput is intentionally artifact-neutral. Value remains
@@ -69,7 +68,6 @@ func (directive *producerRetryDirective) clone() *producerRetryDirective {
 type producerAttemptOutput struct {
 	Value       any
 	Candidate   *contracts.ModelCandidate
-	Warnings    []contracts.Warning
 	Diagnostics []contracts.ProducerDiagnostic
 	Retry       *producerRetryDirective
 }
@@ -82,7 +80,6 @@ func (output producerAttemptOutput) clone() (producerAttemptOutput, error) {
 	return producerAttemptOutput{
 		Value:       output.Value,
 		Candidate:   candidate,
-		Warnings:    cloneWarnings(output.Warnings),
 		Diagnostics: contracts.CloneProducerDiagnostics(output.Diagnostics),
 		Retry:       output.Retry.clone(),
 	}, nil
@@ -116,7 +113,6 @@ func (provenance producerAttemptProvenance) clone() producerAttemptProvenance {
 type producerAttemptTerminal struct {
 	Action               producerTerminalAction
 	Value                any
-	Warnings             []contracts.Warning
 	Diagnostics          []contracts.ProducerDiagnostic
 	Rejection            *contracts.RejectedOutput
 	Validation           validationReport
@@ -125,7 +121,6 @@ type producerAttemptTerminal struct {
 }
 
 func (terminal producerAttemptTerminal) clone() producerAttemptTerminal {
-	terminal.Warnings = cloneWarnings(terminal.Warnings)
 	terminal.Diagnostics = contracts.CloneProducerDiagnostics(terminal.Diagnostics)
 	if terminal.Rejection != nil {
 		rejection := *terminal.Rejection
@@ -210,7 +205,6 @@ func runProducerAttempts(ctx context.Context, config producerAttemptConfig, prod
 			continue
 		}
 		if output.Retry != nil {
-			output.Warnings = append(output.Warnings, cloneWarnings(output.Retry.FallbackWarnings)...)
 			output.Diagnostics = append(output.Diagnostics, contracts.CloneProducerDiagnostics(output.Retry.FallbackDiagnostics)...)
 		}
 		correctionCandidate, err := contracts.CloneModelCandidate(output.Candidate)
@@ -259,14 +253,13 @@ func runProducerAttempts(ctx context.Context, config producerAttemptConfig, prod
 		if incomplete := firstIncompleteValidation(report); incomplete != nil {
 			provenance = append(provenance, producerAttemptProvenance{Number: number, Kind: kind, Outcome: producerAttemptIncompleteAccepted, Validation: report})
 			if config.Policy.ValidatorFailure == ValidatorFailureWarnContinue {
-				warnings := terminalWarnings(output, report)
+				return producerAttemptTerminal{Action: producerTerminalIncompleteAccepted, Value: output.Value, Diagnostics: cloneProducerDiagnostics(output.Diagnostics), Validation: report, ValidationIncomplete: true, Provenance: cloneProducerAttemptProvenance(provenance)}, nil
-				return producerAttemptTerminal{Action: producerTerminalIncompleteAccepted, Value: output.Value, Warnings: warnings, Diagnostics: cloneProducerDiagnostics(output.Diagnostics), Validation: report, ValidationIncomplete: true, Provenance: cloneProducerAttemptProvenance(provenance)}, nil
 			}
 			return failedProducerAttempt(provenance), validatorFailureError(*incomplete)
 		}
 
 		provenance = append(provenance, producerAttemptProvenance{Number: number, Kind: kind, Outcome: producerAttemptAccepted, Validation: report})
-		return producerAttemptTerminal{Action: producerTerminalAccepted, Value: output.Value, Warnings: terminalWarnings(output, report), Diagnostics: cloneProducerDiagnostics(output.Diagnostics), Validation: report, Provenance: cloneProducerAttemptProvenance(provenance)}, nil
+		return producerAttemptTerminal{Action: producerTerminalAccepted, Value: output.Value, Diagnostics: cloneProducerDiagnostics(output.Diagnostics), Validation: report, Provenance: cloneProducerAttemptProvenance(provenance)}, nil
 	}
 
 	return failedProducerAttempt(provenance), errors.New("producer attempt budget was not exhausted deterministically")
@@ -295,7 +288,7 @@ func applySemanticTerminalPolicy(policy ValidationPolicy, provenance []producerA
 	rejected := contracts.RejectedOutput{ValidatorName: rejection.validatorName, ReasonCode: rejection.reasonCode, Message: rejection.message, AttemptCount: number, DiagnosticArtifactPath: rejection.diagnosticPath}
 	switch policy.SemanticRejection {
 	case SemanticRejectionRejectOutput:
-		return producerAttemptTerminal{Action: producerTerminalRejected, Warnings: terminalWarnings(output, report), Diagnostics: cloneProducerDiagnostics(output.Diagnostics), Rejection: &rejected, Validation: report, ValidationIncomplete: firstIncompleteValidation(report) != nil, Provenance: cloneProducerAttemptProvenance(provenance)}, nil
+		return producerAttemptTerminal{Action: producerTerminalRejected, Diagnostics: cloneProducerDiagnostics(output.Diagnostics), Rejection: &rejected, Validation: report, ValidationIncomplete: firstIncompleteValidation(report) != nil, Provenance: cloneProducerAttemptProvenance(provenance)}, nil
 	case SemanticRejectionFailRun:
 		return failedProducerAttempt(provenance), fmt.Errorf("producer candidate rejected after %d attempt(s): %s", number, rejection.message)
 	default:
@@ -313,12 +306,6 @@ func firstIncompleteValidation(report validationReport) *validationRecord {
 	return nil
 }
 
-func terminalWarnings(output producerAttemptOutput, report validationReport) []contracts.Warning {
-	warnings := cloneWarnings(output.Warnings)
-	warnings = append(warnings, report.Warnings()...)
-	return warnings
-}
-
 func cloneProducerDiagnostics(diagnostics []contracts.ProducerDiagnostic) []contracts.ProducerDiagnostic {
 	return contracts.CloneProducerDiagnostics(diagnostics)
 }

internal/framework/pipeline/producer_attempts_test.go

@@ -234,27 +234,27 @@ func TestRunProducerAttemptsUsesModuleRetryBudgetAndFallback(t *testing.T) {
 	})
 
 	t.Run("fallback", func(t *testing.T) {
-		fallbackWarning := contracts.Warning{ReasonCode: "fallback", Message: "fallback warning"}
+		fallbackDiagnostic := contracts.ProducerDiagnostic{Disposition: contracts.DiagnosticDispositionWarning, Category: contracts.DiagnosticCategoryFallback, ReasonCode: "fallback", OccurrenceCount: 1, Samples: []contracts.DiagnosticSample{{Scope: "fallback", Message: "fallback warning"}}}
 		terminal, err := runProducerAttempts(context.Background(), producerAttemptConfig{Policy: DefaultValidationPolicy()}, func(context.Context, producerAttemptRequest) (producerAttemptOutput, error) {
-			return producerAttemptOutput{Value: "fallback", Retry: &producerRetryDirective{FallbackWarnings: []contracts.Warning{fallbackWarning}}}, nil
+			return producerAttemptOutput{Value: "fallback", Retry: &producerRetryDirective{FallbackDiagnostics: []contracts.ProducerDiagnostic{fallbackDiagnostic}}}, nil
 		}, approveAttempt)
 		if err != nil {
 			t.Fatalf("runProducerAttempts() error = %v", err)
 		}
-		if terminal.Action != producerTerminalAccepted || terminal.Value != "fallback" || !reflect.DeepEqual(terminal.Warnings, []contracts.Warning{fallbackWarning}) {
+		if terminal.Action != producerTerminalAccepted || terminal.Value != "fallback" || !reflect.DeepEqual(terminal.Diagnostics, []contracts.ProducerDiagnostic{fallbackDiagnostic}) {
 			t.Fatalf("terminal = %#v", terminal)
 		}
 	})
 }
 
 func TestRunProducerAttemptsRejectionWinsOverValidatorFailure(t *testing.T) {
-	firstWarnings := []contracts.Warning{{ReasonCode: "discarded", Message: "discarded warning"}}
+	firstDiagnostics := []contracts.ProducerDiagnostic{producerDiagnostic("discarded", "discarded warning")}
-	secondWarnings := []contracts.Warning{{ReasonCode: "accepted", Message: "accepted warning"}}
+	secondDiagnostics := []contracts.ProducerDiagnostic{producerDiagnostic("accepted", "accepted warning")}
 	terminal, err := runProducerAttempts(context.Background(), producerAttemptConfig{Retries: 1, Policy: DefaultValidationPolicy()}, func(_ context.Context, request producerAttemptRequest) (producerAttemptOutput, error) {
 		if request.Number == 1 {
-			return producerAttemptOutput{Value: "first", Candidate: attemptCandidate(t, "defective"), Warnings: firstWarnings}, nil
+			return producerAttemptOutput{Value: "first", Candidate: attemptCandidate(t, "defective"), Diagnostics: firstDiagnostics}, nil
 		}
-		return producerAttemptOutput{Value: "second", Candidate: attemptCandidate(t, "corrected"), Warnings: secondWarnings}, nil
+		return producerAttemptOutput{Value: "second", Candidate: attemptCandidate(t, "corrected"), Diagnostics: secondDiagnostics}, nil
 	}, func(_ context.Context, output producerAttemptOutput) (validationReport, error) {
 		if output.Value == "first" {
 			report := rejectedAttemptReport("defect")
@@ -272,8 +272,8 @@ func TestRunProducerAttemptsRejectionWinsOverValidatorFailure(t *testing.T) {
 	if got := attemptKinds(terminal.Provenance); !reflect.DeepEqual(got, []producerAttemptKind{producerAttemptInitial, producerAttemptSemanticRetry}) {
 		t.Fatalf("attempt kinds = %v", got)
 	}
-	if got := terminal.Warnings; !reflect.DeepEqual(got, secondWarnings) {
+	if got := terminal.Diagnostics; !reflect.DeepEqual(got, secondDiagnostics) {
-		t.Fatalf("terminal warnings = %#v, want %#v", got, secondWarnings)
+		t.Fatalf("terminal diagnostics = %#v, want %#v", got, secondDiagnostics)
 	}
 	if len(terminal.Provenance[0].Validation.records) != 2 {
 		t.Fatalf("first validation records = %#v, want rejection and failure", terminal.Provenance[0].Validation.records)
@@ -302,9 +302,6 @@ func TestValidationSummaryIsBoundedAndCorrectedSuccessIsQuiet(t *testing.T) {
 	if len(summary.ReasonCodes) != 0 || len(summary.RejectingValidators) != 0 || len(summary.IncompleteValidators) != 0 {
 		t.Fatalf("corrected success summary retained prior findings: %#v", summary)
 	}
-	if len(terminal.Warnings) != 0 {
-		t.Fatalf("corrected success warnings = %#v, want none", terminal.Warnings)
-	}
 }
 
 func TestWarnContinueRecordsOneWarningForEachExhaustedValidator(t *testing.T) {
@@ -324,9 +321,6 @@ func TestWarnContinueRecordsOneWarningForEachExhaustedValidator(t *testing.T) {
 	if terminal.Action != producerTerminalIncompleteAccepted {
 		t.Fatalf("terminal action = %q", terminal.Action)
 	}
-	if len(terminal.Warnings) != 0 {
-		t.Fatalf("warnings = %#v, want structured diagnostics only", terminal.Warnings)
-	}
 	groups, groupErr := terminalDiagnosticGroups(terminal, contracts.DiagnosticOrigin{Stage: contracts.DiagnosticOriginStageNormalize, StepID: "step", LaneID: "lane", ModuleKey: "module"}, nil)
 	if groupErr != nil {
 		t.Fatalf("terminalDiagnosticGroups() error = %v", groupErr)

internal/framework/pipeline/references.go

@@ -30,45 +30,45 @@ type ReferenceMaterializationOptions struct {
 	WorkingDir string
 }
 
-func MaterializeReferences(resolved ResolvedPipeline, catalog ModuleCatalog, options ReferenceMaterializationOptions) (ResolvedPipeline, []contracts.Warning, error) {
+func MaterializeReferences(resolved ResolvedPipeline, catalog ModuleCatalog, options ReferenceMaterializationOptions) (ResolvedPipeline, []contracts.ProducerDiagnostic, error) {
 	out := resolved
 	out.ChunkReferences = CloneReferenceTarget(resolved.ChunkReferences)
-	chunkReferenceSet, chunkWarnings, err := materializeReferenceTarget(resolved.ID, resolved.ChunkReferences, "", catalog, options)
+	chunkReferenceSet, chunkDiagnostics, err := materializeReferenceTarget(resolved.ID, resolved.ChunkReferences, "", catalog, options)
 	if err != nil {
 		return ResolvedPipeline{}, nil, err
 	}
 	out.ChunkReferences.ReferenceSet = chunkReferenceSet
-	warnings := append([]contracts.Warning(nil), chunkWarnings...)
+	diagnostics := contracts.CloneProducerDiagnostics(chunkDiagnostics)
 	if len(resolved.Steps) == 0 {
-		return out, warnings, nil
+		return out, diagnostics, nil
 	}
-	materializeLane := func(lane ResolvedArtifactLane) (ResolvedArtifactLane, []contracts.Warning, error) {
+	materializeLane := func(lane ResolvedArtifactLane) (ResolvedArtifactLane, []contracts.ProducerDiagnostic, error) {
 		materializedLane := lane
-		var allWarnings []contracts.Warning
+		var allDiagnostics []contracts.ProducerDiagnostic
 		materializedLane.ExtractReferences = CloneReferenceTarget(lane.ExtractReferences)
 		materializedLane.MergeReferences = CloneReferenceTarget(lane.MergeReferences)
 		materializedLane.NormalizeReferences = CloneReferenceTarget(lane.NormalizeReferences)
-		extractReferenceSet, laneWarnings, err := materializeReferenceTarget(resolved.ID, lane.ExtractReferences, lane.ArtifactKind, catalog, options)
+		extractReferenceSet, laneDiagnostics, err := materializeReferenceTarget(resolved.ID, lane.ExtractReferences, lane.ArtifactKind, catalog, options)
 		if err != nil {
 			return ResolvedArtifactLane{}, nil, err
 		}
 		materializedLane.ExtractReferences.ReferenceSet = extractReferenceSet
-		allWarnings = append(allWarnings, laneWarnings...)
+		allDiagnostics = append(allDiagnostics, laneDiagnostics...)
 
-		mergeReferenceSet, laneWarnings, err := materializeReferenceTarget(resolved.ID, lane.MergeReferences, lane.ArtifactKind, catalog, options)
+		mergeReferenceSet, laneDiagnostics, err := materializeReferenceTarget(resolved.ID, lane.MergeReferences, lane.ArtifactKind, catalog, options)
 		if err != nil {
 			return ResolvedArtifactLane{}, nil, err
 		}
 		materializedLane.MergeReferences.ReferenceSet = mergeReferenceSet
-		allWarnings = append(allWarnings, laneWarnings...)
+		allDiagnostics = append(allDiagnostics, laneDiagnostics...)
 
-		normalizeReferenceSet, laneWarnings, err := materializeReferenceTarget(resolved.ID, lane.NormalizeReferences, lane.ArtifactKind, catalog, options)
+		normalizeReferenceSet, laneDiagnostics, err := materializeReferenceTarget(resolved.ID, lane.NormalizeReferences, lane.ArtifactKind, catalog, options)
 		if err != nil {
 			return ResolvedArtifactLane{}, nil, err
 		}
 		materializedLane.NormalizeReferences.ReferenceSet = normalizeReferenceSet
-		allWarnings = append(allWarnings, laneWarnings...)
+		allDiagnostics = append(allDiagnostics, laneDiagnostics...)
-		return materializedLane, allWarnings, nil
+		return materializedLane, allDiagnostics, nil
 	}
 	if len(resolved.Steps) > 0 {
 		out.Steps = make([]ResolvedPipelineStep, len(resolved.Steps))
@@ -76,36 +76,16 @@ func MaterializeReferences(resolved ResolvedPipeline, catalog ModuleCatalog, opt
 			out.Steps[i].ID = step.ID
 			out.Steps[i].ArtifactLanes = make([]ResolvedArtifactLane, len(step.ArtifactLanes))
 			for j, lane := range step.ArtifactLanes {
-				materializedLane, laneWarnings, err := materializeLane(lane)
+				materializedLane, laneDiagnostics, err := materializeLane(lane)
 				if err != nil {
 					return ResolvedPipeline{}, nil, err
 				}
 				out.Steps[i].ArtifactLanes[j] = materializedLane
-				warnings = append(warnings, laneWarnings...)
+				diagnostics = append(diagnostics, laneDiagnostics...)
 			}
 		}
 	}
-	return out, warnings, nil
+	return out, diagnostics, nil
-}
-
-// ReferenceDiagnostics converts framework-owned empty-reference findings into
-// structured process diagnostics. Legacy callers may continue to use the
-// materializer's warning return while the framework migration is in progress.
-func ReferenceDiagnostics(warnings []contracts.Warning) []contracts.ProducerDiagnostic {
-	diagnostics := make([]contracts.ProducerDiagnostic, 0, len(warnings))
-	for _, warning := range warnings {
-		if warning.ReasonCode != "empty_reference" {
-			continue
-		}
-		diagnostics = append(diagnostics, contracts.ProducerDiagnostic{
-			Disposition:     contracts.DiagnosticDispositionWarning,
-			Category:        contracts.DiagnosticCategoryConfiguration,
-			ReasonCode:      "empty_reference",
-			OccurrenceCount: 1,
-			Samples:         []contracts.DiagnosticSample{{Scope: warning.Scope, Message: warning.Message}},
-		})
-	}
-	return contracts.CloneProducerDiagnostics(diagnostics)
 }
 
 func materializeReferenceTarget(
@@ -114,7 +94,7 @@ func materializeReferenceTarget(
 	artifactKind contracts.ArtifactKind,
 	catalog ModuleCatalog,
 	options ReferenceMaterializationOptions,
-) (contracts.ReferenceSet, []contracts.Warning, error) {
+) (contracts.ReferenceSet, []contracts.ProducerDiagnostic, error) {
 	if len(target.Bindings) == 0 {
 		return contracts.ReferenceSet{}, nil, nil
 	}
@@ -129,7 +109,7 @@ func materializeReferenceTarget(
 	}
 
 	set := contracts.ReferenceSet{Slots: make(map[string]contracts.ResolvedReferenceSlot, len(target.Bindings))}
-	var warnings []contracts.Warning
+	var diagnostics []contracts.ProducerDiagnostic
 	for _, binding := range target.Bindings {
 		slotName := strings.TrimSpace(binding.SlotName)
 		slot, ok := slotByName[slotName]
@@ -179,11 +159,7 @@ func materializeReferenceTarget(
 			return contracts.ReferenceSet{}, nil, fmt.Errorf("%s reference slot %q path %q media type %q is not accepted", referenceTargetContext(pipelineID, target), slotName, path, mediaType)
 		}
 		if len(content) == 0 {
-			warnings = append(warnings, contracts.Warning{
+			diagnostics = append(diagnostics, contracts.ProducerDiagnostic{Disposition: contracts.DiagnosticDispositionWarning, Category: contracts.DiagnosticCategoryConfiguration, ReasonCode: "empty_reference", OccurrenceCount: 1, Samples: []contracts.DiagnosticSample{{Scope: referenceWarningScope(pipelineID, target, slotName), Message: fmt.Sprintf("reference slot %q for %s is bound to an empty file", slotName, referenceTargetLabel(target))}}})
-				Scope:      referenceWarningScope(pipelineID, target, slotName),
-				ReasonCode: "empty_reference",
-				Message:    fmt.Sprintf("reference slot %q for %s is bound to an empty file", slotName, referenceTargetLabel(target)),
-			})
 		}
 
 		item := contracts.ReferenceItem{
@@ -200,7 +176,7 @@ func materializeReferenceTarget(
 			Items: []contracts.ReferenceItem{item},
 		}
 	}
-	return set, warnings, nil
+	return set, diagnostics, nil
 }
 
 type referenceSizeLimitError struct {

internal/framework/pipeline/references_test.go

@@ -445,17 +445,13 @@ func TestMaterializeReferencesWarnsForEmptyFiles(t *testing.T) {
 	writeReferenceFile(t, path, nil)
 
 	resolved := resolvedPipelineWithReference(t, "roster", "empty.txt", contracts.ReferenceBindingSourceConfig, contracts.ReferenceSlot{Name: "roster"})
-	materialized, warnings, err := MaterializeReferences(resolved, referenceCatalog(t, []contracts.ReferenceSlot{{Name: "roster"}}), ReferenceMaterializationOptions{
+	materialized, diagnostics, err := MaterializeReferences(resolved, referenceCatalog(t, []contracts.ReferenceSlot{{Name: "roster"}}), ReferenceMaterializationOptions{
 		ConfigPath: filepath.Join(configDir, "config.yml"),
 	})
 	if err != nil {
 		t.Fatalf("MaterializeReferences() error = %v, want nil", err)
 	}
-	if len(warnings) != 1 || warnings[0].ReasonCode != "empty_reference" {
+	if len(diagnostics) != 1 || diagnostics[0].Disposition != contracts.DiagnosticDispositionWarning || diagnostics[0].Category != contracts.DiagnosticCategoryConfiguration || diagnostics[0].ReasonCode != "empty_reference" || diagnostics[0].OccurrenceCount != 1 || len(diagnostics[0].Samples) != 1 {
-		t.Fatalf("warnings = %#v, want empty reference warning", warnings)
-	}
-	diagnostics := ReferenceDiagnostics(warnings)
-	if len(diagnostics) != 1 || diagnostics[0].Disposition != contracts.DiagnosticDispositionWarning || diagnostics[0].Category != contracts.DiagnosticCategoryConfiguration || diagnostics[0].ReasonCode != "empty_reference" || diagnostics[0].OccurrenceCount != 1 || !reflect.DeepEqual(diagnostics[0].Samples, []contracts.DiagnosticSample{{Scope: warnings[0].Scope, Message: warnings[0].Message}}) {
 		t.Fatalf("diagnostics = %#v, want structured empty-reference signal", diagnostics)
 	}
 	item := materialized.Steps[0].ArtifactLanes[0].ExtractReferences.ReferenceSet.Slots["roster"].Items[0]
@@ -487,13 +483,13 @@ func TestMaterializeReferencesWarningScopesIncludeTargetContext(t *testing.T) {
 		t.Fatalf("ResolvePipeline() error = %v, want nil", err)
 	}
 
-	_, warnings, err := MaterializeReferences(resolved, catalog, ReferenceMaterializationOptions{
+	_, diagnostics, err := MaterializeReferences(resolved, catalog, ReferenceMaterializationOptions{
 		ConfigPath: filepath.Join(configDir, "config.yml"),
 	})
 	if err != nil {
 		t.Fatalf("MaterializeReferences() error = %v, want nil", err)
 	}
-	got := warningScopes(warnings)
+	got := diagnosticScopes(diagnostics)
 	want := []string{
 		"pipeline.baseline.chunk.reference.scene_guide",
 		"pipeline.baseline.lane.events.extract.reference.roster",
@@ -625,10 +621,10 @@ func referenceCatalogForTargets(t *testing.T, chunkSlots, extractSlots, mergeSlo
 	)
 }
 
-func warningScopes(warnings []contracts.Warning) []string {
+func diagnosticScopes(diagnostics []contracts.ProducerDiagnostic) []string {
-	scopes := make([]string, 0, len(warnings))
+	scopes := make([]string, 0, len(diagnostics))
-	for _, warning := range warnings {
+	for _, diagnostic := range diagnostics {
-		scopes = append(scopes, warning.Scope)
+		scopes = append(scopes, diagnostic.Samples[0].Scope)
 	}
 	sort.Strings(scopes)
 	return scopes

internal/framework/pipeline/runner.go

@@ -50,7 +50,6 @@ type RunInput struct {
 	StartedAt        time.Time
 	LLMProfiles      []artifacts.LLMProfileManifest
 	Metadata         map[string]any
-	Warnings         []contracts.Warning
 	Diagnostics      []contracts.ProducerDiagnostic
 	ChunkCacheMode   ChunkCacheMode
 	ChunkPlans       ChunkPlanStore
@@ -74,7 +73,6 @@ type RunOutput struct {
 	ChunkPlan           *artifacts.ChunkPlanSummary    `json:"chunk_plan,omitempty"`
 	NormalizeOutputs    []contracts.SerializedOutput   `json:"normalize_outputs,omitempty"`
 	Rejected            []contracts.RejectedOutput     `json:"rejected,omitempty"`
-	Warnings            []contracts.Warning            `json:"warnings,omitempty"`
 	Diagnostics         contracts.DiagnosticCollection `json:"diagnostics,omitempty"`
 	OutputFiles         []contracts.OutputFile         `json:"-"`
 	CheckpointEvents    []CheckpointEvent              `json:"checkpoint_events,omitempty"`
@@ -132,7 +130,6 @@ func (r *Runner) Run(ctx context.Context, input RunInput) (output RunOutput, err
 	defer func() {
 		output.Manifest.LLMProfiles = mergeLLMProfileManifests(input.LLMProfiles, llmProfileManifests(input.llmClient))
 	}()
-	output.Warnings = append(output.Warnings, cloneWarnings(input.Warnings)...)
 	inputDiagnostics, diagnosticErr := promoteProducerDiagnostics(input.Diagnostics, contracts.DiagnosticOrigin{Stage: contracts.DiagnosticOriginStageReferences}, nil)
 	if diagnosticErr != nil {
 		return failOutput(output), fmt.Errorf("promote input diagnostics: %w", diagnosticErr)
@@ -256,14 +253,12 @@ func (r *Runner) Run(ctx context.Context, input RunInput) (output RunOutput, err
 	if chunkResult.validation != nil {
 		output.ValidationSummaries = append(output.ValidationSummaries, artifacts.CloneValidationSummary(*chunkResult.validation))
 	}
-	output.Warnings = append(output.Warnings, chunkResult.warnings...)
 	appendDiagnosticGroups(&output, chunkResult.diagnostics)
 	chunkDebugPayload := map[string]any{
 		"cache_mode":          chunkMode,
 		"lookup":              chunkResult.lookup,
 		"accepted":            chunkResult.accepted,
 		"materialized_chunks": debugSourceChunkEnvelopes(chunkResult.chunks),
-		"warnings":            chunkResult.warnings,
 	}
 	if chunkResult.plan != nil {
 		chunkDebugPayload["plan"] = debugChunkPlanEnvelope(*chunkResult.plan)
@@ -356,7 +351,6 @@ func (r *Runner) Run(ctx context.Context, input RunInput) (output RunOutput, err
 		"manifest":          output.Manifest,
 		"normalize_outputs": debugSerializedOutputEnvelopes(output.NormalizeOutputs),
 		"rejected":          debugRejectedOutputEnvelopes(output.Rejected),
-		"warnings":          output.Warnings,
 		"options":           redactSensitiveMap(input.pipeline.Output.Options),
 		"metadata":          redactSensitiveMap(input.Metadata),
 	}
@@ -385,7 +379,6 @@ func (r *Runner) Run(ctx context.Context, input RunInput) (output RunOutput, err
 		Manifest:                       output.Manifest,
 		NormalizeOutputs:               cloneSerializedOutputs(output.NormalizeOutputs),
 		Rejected:                       cloneRejectedOutputs(output.Rejected),
-		Warnings:                       output.Warnings,
 		Diagnostics:                    contracts.CloneDiagnosticCollection(output.Diagnostics),
 		LLMProfile:                     input.pipeline.Output.LLMProfile,
 		StructuredOutputRepairAttempts: cloneStructuredOutputRepairAttempts(input.pipeline.Output.StructuredOutputRepairAttempts),
@@ -455,7 +448,6 @@ func (r *Runner) runPreparedSteps(ctx context.Context, input RunInput, checkpoin
 type retryAttemptResult struct {
 	accepted  bool
 	rejection *contracts.RejectedOutput
-	warnings  []contracts.Warning
 }
 
 func runSimpleRetry(ctx context.Context, retries int, run func(attempt int) (retryAttemptResult, error)) (retryAttemptResult, error) {
@@ -485,7 +477,7 @@ func runSimpleRetry(ctx context.Context, retries int, run func(attempt int) (ret
 		if result.rejection != nil {
 			rejection := *result.rejection
 			rejection.AttemptCount = attempt
-			last = retryAttemptResult{rejection: &rejection, warnings: cloneWarnings(result.warnings)}
+			last = retryAttemptResult{rejection: &rejection}
 		}
 		if ctxErr := ctx.Err(); ctxErr != nil {
 			return retryAttemptResult{}, ctxErr
@@ -708,6 +700,10 @@ func validatorChainManifests(chains []ResolvedValidatorChain) []artifacts.Valida
 }
 
 func failOutput(output RunOutput) RunOutput {
+	// Preserve any diagnostics already accepted by the pipeline when a later
+	// operation fails. Producers and validators validate each diagnostic before
+	// it is appended, so finalization here cannot introduce a new failure path.
+	_ = finalizeDiagnostics(&output)
 	if output.Manifest.PipelineID != "" {
 		populateOutputManifest(&output)
 		output.Manifest.ValidationStatus = "failed"
@@ -982,13 +978,6 @@ func manifestMetadataWithSessionID(metadata map[string]any, sessionID string) (m
 	return out, nil
 }
 
-func cloneWarnings(warnings []contracts.Warning) []contracts.Warning {
-	if len(warnings) == 0 {
-		return nil
-	}
-	return append([]contracts.Warning(nil), warnings...)
-}
-
 func cloneSourceChunkPtr(chunk *source.Chunk) (*source.Chunk, error) {
 	if chunk == nil {
 		return nil, nil

internal/framework/pipeline/runner_accepted_checkpoint_test.go

@@ -84,7 +84,8 @@ func TestRunnerHydratesRequiredNormalizedArtifact(t *testing.T) {
 	loader := newAcceptedCheckpointLoader()
 	producerKey := CheckpointLaneKey(producer.resolved.StepID, producer.resolved.ID)
 	consumerKey := CheckpointLaneKey(consumer.resolved.StepID, consumer.resolved.ID)
-	loader.accepted[producerKey] = NormalizeCheckpoint{Output: stored, Warnings: []contracts.Warning{{Scope: "normalize", ReasonCode: "stored-warning", Message: "stored normalize warning"}}}
+	stored.Diagnostics = []CheckpointDiagnostic{{Diagnostic: contracts.ProducerDiagnostic{Disposition: contracts.DiagnosticDispositionWarning, Category: contracts.DiagnosticCategoryFallback, ReasonCode: "stored-warning", OccurrenceCount: 1, Samples: []contracts.DiagnosticSample{{Scope: "normalize", Message: "stored normalize warning"}}}}}
+	loader.accepted[producerKey] = NormalizeCheckpoint{Output: stored}
 	loader.acceptedDecision[producerKey] = NewCheckpointDecision(CheckpointDecisionReused, CheckpointReasonAcceptedArtifactReused)
 	policy := CheckpointExecutionPolicy{
 		RequireReusableLanes: map[string]struct{}{producerKey: {}},
@@ -101,8 +102,8 @@ func TestRunnerHydratesRequiredNormalizedArtifact(t *testing.T) {
 	if string(item.Content) != string(stored.Artifact.Content) || item.Producer.StepID != producer.resolved.StepID || item.Producer.LaneID != producer.resolved.ID {
 		t.Fatalf("consumer generated reference = %#v, want exact hydrated producer bytes and identity", item)
 	}
-	if len(output.Warnings) != 1 || output.Warnings[0].ReasonCode != "stored-warning" {
+	if len(output.Diagnostics.Groups) != 1 || output.Diagnostics.Groups[0].ReasonCode != "stored-warning" {
-		t.Fatalf("hydrated warnings = %#v, want normalize checkpoint warnings only", output.Warnings)
+		t.Fatalf("hydrated diagnostics = %#v, want normalize checkpoint diagnostics only", output.Diagnostics)
 	}
 	assertAcceptedNormalizeEvent(t, output.CheckpointEvents, producer.resolved.StepID, producer.resolved.ID, CheckpointDecisionReused, CheckpointReasonAcceptedArtifactReused)
 	for _, event := range output.CheckpointEvents {
@@ -225,7 +226,8 @@ func TestRunnerRetainsEarlierHydratedProducerWhenLaterRequiredProducerFails(t *t
 	loader := newAcceptedCheckpointLoader()
 	firstKey := CheckpointLaneKey(first.resolved.StepID, first.resolved.ID)
 	secondKey := CheckpointLaneKey(second.resolved.StepID, second.resolved.ID)
-	loader.accepted[firstKey] = NormalizeCheckpoint{Output: stored, Warnings: []contracts.Warning{{Scope: "normalize", ReasonCode: "retained-warning", Message: "retained warning"}}}
+	stored.Diagnostics = []CheckpointDiagnostic{{Diagnostic: contracts.ProducerDiagnostic{Disposition: contracts.DiagnosticDispositionWarning, Category: contracts.DiagnosticCategoryFallback, ReasonCode: "retained-warning", OccurrenceCount: 1, Samples: []contracts.DiagnosticSample{{Scope: "normalize", Message: "retained warning"}}}}}
+	loader.accepted[firstKey] = NormalizeCheckpoint{Output: stored}
 	loader.acceptedDecision[firstKey] = NewCheckpointDecision(CheckpointDecisionReused, CheckpointReasonAcceptedArtifactReused)
 	loader.acceptedDecision[secondKey] = NewCheckpointDecision(CheckpointDecisionExecuted, CheckpointReasonMissing)
 	policy := CheckpointExecutionPolicy{RequireReusableLanes: map[string]struct{}{firstKey: {}, secondKey: {}}}
@@ -240,8 +242,8 @@ func TestRunnerRetainsEarlierHydratedProducerWhenLaterRequiredProducerFails(t *t
 	if len(output.NormalizeOutputs) != 1 || output.NormalizeOutputs[0].LaneID != first.resolved.ID || string(output.NormalizeOutputs[0].Artifact.Content) != string(stored.Artifact.Content) {
 		t.Fatalf("retained normalize outputs = %#v, want first producer", output.NormalizeOutputs)
 	}
-	if len(output.Warnings) != 1 || output.Warnings[0].ReasonCode != "retained-warning" {
+	if len(output.Diagnostics.Groups) != 1 || output.Diagnostics.Groups[0].ReasonCode != "retained-warning" {
-		t.Fatalf("retained warnings = %#v", output.Warnings)
+		t.Fatalf("retained diagnostics = %#v", output.Diagnostics)
 	}
 	type decisionExpectation struct {
 		step, lane string

internal/framework/pipeline/runner_attempt_debug_test.go

@@ -162,13 +162,13 @@ func TestRunnerWritesAttemptScopedMergeAndNormalizeDebug(t *testing.T) {
 		if err := callAttemptDebugLLM(ctx, client, "merge"); err != nil {
 			return erasedTypedResult{}, err
 		}
-		return erasedTypedResult{Value: codecNotes{Items: []string{"merged"}}, Warnings: []contracts.Warning{{Scope: "merge", ReasonCode: "observed", Message: "merge warning"}}}, nil
+		return erasedTypedResult{Value: codecNotes{Items: []string{"merged"}}, Diagnostics: []contracts.ProducerDiagnostic{producerDiagnostic("merge", "merge diagnostic")}}, nil
 	}
 	prepared.Steps[0].lanes[0].typed.normalize = func(ctx context.Context, _ any, _ contracts.TypedNormalizeRequest[any]) (erasedTypedResult, error) {
 		if err := callAttemptDebugLLM(ctx, client, "normalize"); err != nil {
 			return erasedTypedResult{}, err
 		}
-		return erasedTypedResult{Value: codecNotes{Items: []string{"normalized"}}, Warnings: []contracts.Warning{{Scope: "normalize", ReasonCode: "observed", Message: "normalize warning"}}}, nil
+		return erasedTypedResult{Value: codecNotes{Items: []string{"normalized"}}, Diagnostics: []contracts.ProducerDiagnostic{producerDiagnostic("normalize", "normalize diagnostic")}}, nil
 	}
 
 	output, err := New().Run(context.Background(), RunInput{Prepared: prepared, RawInput: []byte("input"), Debug: debug})
@@ -213,7 +213,7 @@ func TestRunnerWritesAttemptScopedMergeAndNormalizeDebug(t *testing.T) {
 	}
 }
 
-func TestRunnerRecordsDistinctRetryAttemptsAndPromotesAcceptedWarningsOnly(t *testing.T) {
+func TestRunnerRecordsDistinctRetryAttemptsAndPromotesAcceptedDiagnosticsOnly(t *testing.T) {
 	for _, stage := range []ModuleStage{StageMerge, StageNormalize} {
 		t.Run(string(stage), func(t *testing.T) {
 			prepared := preparedAttemptDebugPipeline(t)
@@ -230,7 +230,7 @@ func TestRunnerRecordsDistinctRetryAttemptsAndPromotesAcceptedWarningsOnly(t *te
 				if attempts == 1 {
 					scope = "discarded"
 				}
-				return erasedTypedResult{Value: codecNotes{Items: []string{scope}}, Warnings: []contracts.Warning{{Scope: scope, ReasonCode: "observed", Message: scope}}, ModelCandidate: attemptCandidate(t, fmt.Sprintf(`{"items":["%s"]}`, scope))}, nil
+				return erasedTypedResult{Value: codecNotes{Items: []string{scope}}, Diagnostics: []contracts.ProducerDiagnostic{producerDiagnostic(scope, scope)}, ModelCandidate: attemptCandidate(t, fmt.Sprintf(`{"items":["%s"]}`, scope))}, nil
 			}
 			validatorCalls := 0
 			validator := preparedValidator{
@@ -268,11 +268,11 @@ func TestRunnerRecordsDistinctRetryAttemptsAndPromotesAcceptedWarningsOnly(t *te
 			if len(first.LLMCalls) != 1 || len(second.LLMCalls) != 1 || first.LLMCalls[0].CallID == second.LLMCalls[0].CallID {
 				t.Fatalf("retry LLM calls = first %#v, second %#v; want distinct calls", first.LLMCalls, second.LLMCalls)
 			}
-			if !strings.Contains(string(debug.json[firstPath]), "discarded") || !strings.Contains(string(debug.json[firstPath]), "rejection") {
+			if !strings.Contains(string(debug.json[firstPath]), "rejection") {
-				t.Fatalf("first attempt envelope = %s, want discarded warning and rejection", debug.json[firstPath])
+				t.Fatalf("first attempt envelope = %s, want rejection", debug.json[firstPath])
 			}
-			if len(output.Warnings) != 1 || output.Warnings[0].Scope != "accepted" {
+			if len(output.Diagnostics.Groups) != 1 || output.Diagnostics.Groups[0].Samples[0].Scope != "accepted" {
-				t.Fatalf("promoted warnings = %#v, want accepted attempt only", output.Warnings)
+				t.Fatalf("promoted diagnostics = %#v, want accepted attempt only", output.Diagnostics)
 			}
 		})
 	}

internal/framework/pipeline/runner_candidate_encoding_test.go

@@ -101,13 +101,13 @@ type candidateCheckpointRecorder struct {
 	normalizeOutput    CheckpointArtifact
 }
 
-func (r *candidateCheckpointRecorder) MergeSucceeded(_ string, _ string, _ []CheckpointFingerprint, output CheckpointArtifact, _ []contracts.Warning) error {
+func (r *candidateCheckpointRecorder) MergeSucceeded(_ string, _ string, _ []CheckpointFingerprint, output CheckpointArtifact) error {
 	r.mergeSucceeded++
 	r.mergeOutput = cloneCheckpointArtifact(output)
 	return nil
 }
 
-func (r *candidateCheckpointRecorder) NormalizeSucceeded(_ string, _ string, _ []CheckpointFingerprint, output CheckpointArtifact, _ []contracts.Warning) error {
+func (r *candidateCheckpointRecorder) NormalizeSucceeded(_ string, _ string, _ []CheckpointFingerprint, output CheckpointArtifact) error {
 	r.normalizeSucceeded++
 	r.normalizeOutput = cloneCheckpointArtifact(output)
 	return nil

internal/framework/pipeline/runner_chunk_plan.go

@@ -15,7 +15,6 @@ type chunkPlanExecution struct {
 	accepted    bool
 	chunks      []source.Chunk
 	plan        *source.ChunkPlan
-	warnings    []contracts.Warning
 	diagnostics []contracts.DiagnosticGroup
 	rejection   *contracts.RejectedOutput
 	lookup      ChunkPlanDecision
@@ -29,7 +28,6 @@ type generatedChunkPlanCandidate struct {
 	plan                source.ChunkPlan
 	chunks              []source.Chunk
 	record              ChunkPlanRecord
-	producerWarnings    []contracts.Warning
 	producerDiagnostics []contracts.ProducerDiagnostic
 	terminal            *attemptTerminalRecorder
 }
@@ -71,7 +69,7 @@ func (r *Runner) runChunkPlan(ctx context.Context, input RunInput, doc *source.S
 			if validationErr == nil {
 				report, err := r.validateChunkReport(ctx, doc, chunker.Key(), chunks, sourceInput, sessionID, input.pipeline.ChunkReferences.ReferenceSet, input.Metadata, input.Prepared.chunkValidators, 1, input.Debug)
 				if err != nil {
-					result.setValidation(report.Warnings(), nil, err)
+					result.setValidation(nil, err)
 					return result, err
 				}
 				rejection := report.FirstRejection()
@@ -82,9 +80,8 @@ func (r *Runner) runChunkPlan(ctx context.Context, input RunInput, doc *source.S
 					}
 					result.plan = &plan
 					result.chunks = chunks
-					result.warnings = append(cloneWarnings(record.Warnings), report.Warnings()...)
 					result.accepted = true
-					result.setValidation(report.Warnings(), nil, nil)
+					result.setValidation(nil, nil)
 					cachedTerminal := producerAttemptTerminal{Action: producerTerminalAccepted, Diagnostics: contracts.CloneProducerDiagnostics(record.Diagnostics), Validation: report}
 					diagnostics, diagnosticErr := terminalDiagnosticGroups(cachedTerminal, contracts.DiagnosticOrigin{Stage: contracts.DiagnosticOriginStageChunk, ModuleKey: chunker.Key()}, nil)
 					if diagnosticErr != nil {
@@ -97,7 +94,7 @@ func (r *Runner) runChunkPlan(ctx context.Context, input RunInput, doc *source.S
 				}
 				if incomplete != nil && input.pipeline.ChunkValidationPolicy.ValidatorFailure == ValidatorFailureFailRun {
 					failure := validatorFailureError(*incomplete)
-					result.setValidation(report.Warnings(), nil, failure)
+					result.setValidation(nil, failure)
 					failedTerminal := producerAttemptTerminal{Action: producerTerminalFailed, Validation: report, ValidationIncomplete: true}
 					summary := validationSummary(failedTerminal, StageChunk, "", "", chunker.Key(), "", 0)
 					result.validation = &summary
@@ -145,7 +142,7 @@ func (r *Runner) runChunkPlan(ctx context.Context, input RunInput, doc *source.S
 		plan, chunks, validationErr := validateAndMaterializeChunkPlan(doc, chunkResult.Plan)
 		if validationErr != nil {
 			attemptErr := fmt.Errorf("validate chunk plan from chunker %q: %w", chunker.Key(), validationErr)
-			payload := map[string]any{"plan": debugChunkPlanEnvelope(chunkResult.Plan), "warnings": debugWarningEnvelopes(chunkResult.Warnings)}
+			payload := map[string]any{"plan": debugChunkPlanEnvelope(chunkResult.Plan)}
 			return producerAttemptOutput{}, attemptTerminal.record(payload, fmt.Errorf("%w: %v", contracts.ErrInvalidStructuredOutput, attemptErr))
 		}
 		planDigest, digestErr := source.DigestChunkPlan(plan)
@@ -168,19 +165,18 @@ func (r *Runner) runChunkPlan(ctx context.Context, input RunInput, doc *source.S
 				References: append([]artifacts.ReferenceProvenance(nil), referenceTargetProvenance(input.pipeline.ChunkReferences)...),
 				Metadata:   producerMetadata,
 			},
-			Warnings: cloneWarnings(chunkResult.Warnings), CreatedAt: time.Now().UTC(),
+			CreatedAt: time.Now().UTC(),
 		}
-		return producerAttemptOutput{Value: generatedChunkPlanCandidate{plan: plan, chunks: chunks, record: candidate, producerWarnings: cloneWarnings(chunkResult.Warnings), producerDiagnostics: contracts.CloneProducerDiagnostics(chunkResult.Diagnostics), terminal: &attemptTerminal}, Candidate: chunkResult.ModelCandidate, Warnings: cloneWarnings(chunkResult.Warnings), Diagnostics: contracts.CloneProducerDiagnostics(chunkResult.Diagnostics)}, nil
+		return producerAttemptOutput{Value: generatedChunkPlanCandidate{plan: plan, chunks: chunks, record: candidate, producerDiagnostics: contracts.CloneProducerDiagnostics(chunkResult.Diagnostics), terminal: &attemptTerminal}, Candidate: chunkResult.ModelCandidate, Diagnostics: contracts.CloneProducerDiagnostics(chunkResult.Diagnostics)}, nil
 	}, func(validationCtx context.Context, output producerAttemptOutput) (validationReport, error) {
 		candidate, ok := output.Value.(generatedChunkPlanCandidate)
 		if !ok {
 			return validationReport{}, fmt.Errorf("chunk attempt candidate has incompatible type")
 		}
 		report, validationErr := r.validateChunkReport(validationCtx, doc, chunker.Key(), candidate.chunks, sourceInput, sessionID, input.pipeline.ChunkReferences.ReferenceSet, input.Metadata, input.Prepared.chunkValidators, candidate.terminal.envelope.Attempt, input.Debug)
-		attemptWarnings := append(cloneWarnings(output.Warnings), report.Warnings()...)
 		payload := map[string]any{
 			"plan": debugChunkPlanEnvelope(candidate.plan), "materialized_chunks": debugSourceChunkEnvelopes(candidate.chunks),
-			"warnings": debugWarningEnvelopes(attemptWarnings), "rejection": debugRejectedOutputPtr(chunkRejection(report, candidate.terminal.envelope.Attempt, chunker.Key())),
+			"rejection": debugRejectedOutputPtr(chunkRejection(report, candidate.terminal.envelope.Attempt, chunker.Key())),
 		}
 		if validationErr != nil {
 			return report, candidate.terminal.record(payload, validationErr)
@@ -208,12 +204,11 @@ func (r *Runner) runChunkPlan(ctx context.Context, input RunInput, doc *source.S
 			result.rejection.Stage = string(StageChunk)
 			result.rejection.ModuleKey = chunker.Key()
 		}
-		result.warnings = cloneWarnings(terminal.Warnings)
 		result.validation = &terminalSummary
 		if result.rejection != nil {
 			result.rejection.Validation = cloneValidationSummaryPtr(result.validation)
 		}
-		result.setValidation(terminal.Validation.Warnings(), result.rejection, nil)
+		result.setValidation(result.rejection, nil)
 		return result, nil
 	}
 	candidate, ok := terminal.Value.(generatedChunkPlanCandidate)
@@ -234,9 +229,8 @@ func (r *Runner) runChunkPlan(ctx context.Context, input RunInput, doc *source.S
 	result.accepted = true
 	result.plan = &candidate.plan
 	result.chunks = candidate.chunks
-	result.warnings = cloneWarnings(terminal.Warnings)
 	result.validation = &terminalSummary
-	result.setValidation(terminal.Validation.Warnings(), nil, nil)
+	result.setValidation(nil, nil)
 	if terminal.ValidationIncomplete {
 		result.summary.ValidationStatus = "incomplete"
 	}
@@ -246,7 +240,6 @@ func (r *Runner) runChunkPlan(ctx context.Context, input RunInput, doc *source.S
 		if cloneErr != nil {
 			return result, fmt.Errorf("clone chunk plan record for publication: %w", cloneErr)
 		}
-		record.Warnings = cloneWarnings(candidate.producerWarnings)
 		record.Diagnostics = contracts.CloneProducerDiagnostics(candidate.producerDiagnostics)
 		if err := input.ChunkPlans.Save(record); err != nil {
 			return result, fmt.Errorf("save chunk plan: %w", err)
@@ -303,14 +296,12 @@ func (result *chunkPlanExecution) setCandidate(record ChunkPlanRecord, action st
 	return nil
 }
 
-func (result *chunkPlanExecution) setValidation(warnings []contracts.Warning, rejection *contracts.RejectedOutput, err error) {
+func (result *chunkPlanExecution) setValidation(rejection *contracts.RejectedOutput, err error) {
 	switch {
 	case err != nil:
 		result.summary.ValidationStatus = "error"
 	case rejection != nil:
 		result.summary.ValidationStatus = "rejected"
-	case len(warnings) > 0:
-		result.summary.ValidationStatus = "approved_with_warnings"
 	default:
 		result.summary.ValidationStatus = "approved"
 	}
@@ -324,7 +315,6 @@ func cloneChunkPlanRecord(record ChunkPlanRecord) (ChunkPlanRecord, error) {
 		return ChunkPlanRecord{}, fmt.Errorf("clone chunk plan producer metadata: %w", err)
 	}
 	record.Producer.Metadata = metadata
-	record.Warnings = cloneWarnings(record.Warnings)
 	record.Diagnostics = contracts.CloneProducerDiagnostics(record.Diagnostics)
 	return record, nil
 }

internal/framework/pipeline/runner_chunk_plan_test.go

@@ -118,9 +118,9 @@ func (*retryingChunker) ReferenceSlots() []contracts.ReferenceSlot { return nil
 func (c *retryingChunker) Plan(context.Context, contracts.ChunkRequest) (contracts.ChunkPlanResult, error) {
 	c.calls++
 	if c.calls == 1 {
-		return contracts.ChunkPlanResult{Warnings: []contracts.Warning{{Scope: "discarded", ReasonCode: "retry", Message: "discarded warning"}}}, errors.New("retry generation")
+		return contracts.ChunkPlanResult{Diagnostics: []contracts.ProducerDiagnostic{producerDiagnostic("discarded", "discarded diagnostic")}}, errors.New("retry generation")
 	}
-	return contracts.ChunkPlanResult{Plan: source.CloneChunkPlan(c.plan), Warnings: []contracts.Warning{{Scope: "accepted", ReasonCode: "observed", Message: "accepted warning"}}}, nil
+	return contracts.ChunkPlanResult{Plan: source.CloneChunkPlan(c.plan), Diagnostics: []contracts.ProducerDiagnostic{producerDiagnostic("accepted", "accepted diagnostic")}}, nil
 }
 
 type dependencyLoader struct {
@@ -399,7 +399,7 @@ func TestRunnerRegeneratesValidationIncompleteChunkPlanHit(t *testing.T) {
 		}},
 	}}
 	record := chunkPlanRecord(t, prepared, plan)
-	record.Warnings = []contracts.Warning{{Scope: "stored", ReasonCode: "old", Message: "discarded stored warning"}}
+	record.Diagnostics = []contracts.ProducerDiagnostic{producerDiagnostic("stored", "discarded stored diagnostic")}
 	store := &recordingChunkPlanStore{record: record, decision: ChunkPlanDecision{Status: ChunkPlanHit}}
 	debug := newCapturedDebugRecorder()
 
@@ -413,8 +413,8 @@ func TestRunnerRegeneratesValidationIncompleteChunkPlanHit(t *testing.T) {
 	if output.ChunkPlan == nil || output.ChunkPlan.Action != "generated" || output.ChunkPlan.LookupStatus != "invalid" || output.ChunkPlan.ValidationStatus != "approved" {
 		t.Fatalf("chunk plan summary = %#v", output.ChunkPlan)
 	}
-	if len(output.Warnings) != 0 {
+	if len(output.Diagnostics.Groups) != 0 {
-		t.Fatalf("warnings = %#v, want discarded cache warnings omitted", output.Warnings)
+		t.Fatalf("diagnostics = %#v, want discarded cache diagnostics omitted", output.Diagnostics)
 	}
 	assertAttemptEnvelopeSequence(t, debug, "chunk", 1)
 }
@@ -427,7 +427,7 @@ func TestRunnerKeepsStoredPlanWhenCacheAndGeneratedValidationAreIncomplete(t *te
 	validator := &countingChunkValidator{err: errors.New("validator unavailable")}
 	prepared.chunkValidators.validators = []preparedValidator{{resolved: ResolvedValidator{Binding: Binding(validator.Name()), Target: ValidatorTargetChunk}, chunk: validator}}
 	record := chunkPlanRecord(t, prepared, plan)
-	record.Warnings = []contracts.Warning{{Scope: "stored", ReasonCode: "old", Message: "discarded stored warning"}}
+	record.Diagnostics = []contracts.ProducerDiagnostic{producerDiagnostic("stored", "discarded stored diagnostic")}
 	store := &recordingChunkPlanStore{record: record, decision: ChunkPlanDecision{Status: ChunkPlanHit}}
 
 	output, err := New().Run(context.Background(), RunInput{Prepared: prepared, RawInput: []byte("input"), ChunkCacheMode: ChunkCacheAuto, ChunkPlans: store})
@@ -440,8 +440,8 @@ func TestRunnerKeepsStoredPlanWhenCacheAndGeneratedValidationAreIncomplete(t *te
 	if output.ChunkPlan == nil || output.ChunkPlan.Action != "generated" || output.ChunkPlan.LookupStatus != "invalid" || output.ChunkPlan.ValidationStatus != "incomplete" {
 		t.Fatalf("chunk plan summary = %#v", output.ChunkPlan)
 	}
-	if len(output.Warnings) != 1 || output.Warnings[0].ReasonCode != "validator_execution_incomplete" {
+	if len(output.Diagnostics.Groups) != 1 || output.Diagnostics.Groups[0].ReasonCode != "validator_execution_incomplete" {
-		t.Fatalf("warnings = %#v, want only generated incomplete warning", output.Warnings)
+		t.Fatalf("diagnostics = %#v, want only generated incomplete diagnostic", output.Diagnostics)
 	}
 	if !reflect.DeepEqual(store.record, record) {
 		t.Fatal("discarded incomplete candidates mutated the stored record")
@@ -611,8 +611,8 @@ func TestRunnerRetriesBeforePublishingAcceptedPlan(t *testing.T) {
 	if chunker.calls != 2 || store.saves != 1 {
 		t.Fatalf("module calls = %d saves = %d, want 2 and 1", chunker.calls, store.saves)
 	}
-	if len(output.Warnings) != 1 || output.Warnings[0].Scope != "accepted" || len(store.saved.Warnings) != 1 || store.saved.Warnings[0].Scope != "accepted" {
+	if len(output.Diagnostics.Groups) != 1 || output.Diagnostics.Groups[0].Samples[0].Scope != "accepted" || len(store.saved.Diagnostics) != 1 || store.saved.Diagnostics[0].Samples[0].Scope != "accepted" {
-		t.Fatalf("output warnings = %#v stored warnings = %#v", output.Warnings, store.saved.Warnings)
+		t.Fatalf("output diagnostics = %#v stored diagnostics = %#v", output.Diagnostics, store.saved.Diagnostics)
 	}
 }
 
@@ -624,7 +624,7 @@ func TestRunnerAutoHitValidatesOnceWithoutRegenerationOrMutation(t *testing.T) {
 		wantError    string
 		wantReject   bool
 	}{
-		{name: "warning", result: contracts.ValidationResult{Approved: true, Warnings: []contracts.Warning{{Scope: "current", ReasonCode: "observed", Message: "current warning"}}}},
+		{name: "diagnostic", result: contracts.ValidationResult{Approved: true, Diagnostics: []contracts.ProducerDiagnostic{producerDiagnostic("current", "current diagnostic")}}},
 		{name: "rejection", result: contracts.ValidationResult{Approved: false, ReasonCode: "rejected", Message: "rejected hit", CorrectionGuidance: "return an acceptable chunk plan"}, wantReject: true},
 		{name: "error", validatorErr: errors.New("validator failed"), wantError: "validator failed"},
 	}
@@ -637,7 +637,7 @@ func TestRunnerAutoHitValidatesOnceWithoutRegenerationOrMutation(t *testing.T) {
 			validator := &countingChunkValidator{result: tc.result, err: tc.validatorErr}
 			prepared.chunkValidators.validators = []preparedValidator{{resolved: ResolvedValidator{Binding: Binding(validator.Name()), Target: ValidatorTargetChunk}, chunk: validator}}
 			record := chunkPlanRecord(t, prepared, plan)
-			record.Warnings = []contracts.Warning{{Scope: "stored", ReasonCode: "observed", Message: "stored warning"}}
+			record.Diagnostics = []contracts.ProducerDiagnostic{producerDiagnostic("stored", "stored diagnostic")}
 			store := &recordingChunkPlanStore{record: record, decision: ChunkPlanDecision{Status: ChunkPlanHit}}
 			debug := newCapturedDebugRecorder()
 			output, err := New().Run(context.Background(), RunInput{Prepared: prepared, RawInput: []byte("input"), ChunkCacheMode: ChunkCacheAuto, ChunkPlans: store, Debug: debug})
@@ -673,8 +673,8 @@ func TestRunnerAutoHitValidatesOnceWithoutRegenerationOrMutation(t *testing.T) {
 			if tc.wantReject && (len(output.Rejected) != 1 || output.Rejected[0].ReasonCode != "rejected") {
 				t.Fatalf("rejected = %#v", output.Rejected)
 			}
-			if tc.wantError == "" && !tc.wantReject && len(output.Warnings) != 1+len(tc.result.Warnings) {
+			if tc.wantError == "" && !tc.wantReject && len(output.Diagnostics.Groups) != 1+len(tc.result.Diagnostics) {
-				t.Fatalf("warnings = %#v, want stored warning once plus current warnings", output.Warnings)
+				t.Fatalf("diagnostics = %#v, want stored diagnostic once plus current diagnostics", output.Diagnostics)
 			}
 		})
 	}
@@ -724,7 +724,7 @@ func TestRunnerPublishesOnlyAcceptedGeneratedPlans(t *testing.T) {
 	}
 }
 
-func TestRunnerStoresProducerProvenanceAndProducerWarnings(t *testing.T) {
+func TestRunnerStoresProducerProvenanceAndDiagnostics(t *testing.T) {
 	prepared, plan := preparedTerminalDebugPipeline(t)
 	prepared.resolved.Chunk.LLMProfile = "chunk-profile"
 	prepared.resolved.ChunkExecutionClass = contracts.ExecutionClassLLMBacked
@@ -734,8 +734,8 @@ func TestRunnerStoresProducerProvenanceAndProducerWarnings(t *testing.T) {
 			"guide": {Items: []contracts.ReferenceItem{{SlotName: "guide", Digest: "sha256:guide", Origin: contracts.ReferenceOrigin{Type: "file", URI: "file:///guide.txt"}, Content: []byte("sensitive")}}},
 		}},
 	}
-	prepared.chunker = manifestChunker{terminalChunker: terminalChunker{key: prepared.resolved.Chunk.Module, plan: plan, warnings: []contracts.Warning{{Scope: "producer", ReasonCode: "observed", Message: "producer warning"}}}, metadata: map[string]any{"prompt_id": "chunk/prompt"}}
+	prepared.chunker = manifestChunker{terminalChunker: terminalChunker{key: prepared.resolved.Chunk.Module, plan: plan, diagnostics: []contracts.ProducerDiagnostic{producerDiagnostic("producer", "producer diagnostic")}}, metadata: map[string]any{"prompt_id": "chunk/prompt"}}
-	validator := &countingChunkValidator{result: contracts.ValidationResult{Approved: true, Warnings: []contracts.Warning{{Scope: "validator", ReasonCode: "observed", Message: "validator warning"}}}}
+	validator := &countingChunkValidator{result: contracts.ValidationResult{Approved: true, Diagnostics: []contracts.ProducerDiagnostic{producerDiagnostic("validator", "validator diagnostic")}}}
 	prepared.chunkValidators.validators = []preparedValidator{{resolved: ResolvedValidator{Binding: Binding(validator.Name()), Target: ValidatorTargetChunk}, chunk: validator}}
 	store := &recordingChunkPlanStore{}
 	if _, err := New().Run(context.Background(), RunInput{Prepared: prepared, RawInput: []byte("input"), ChunkCacheMode: ChunkCacheRefresh, ChunkPlans: store}); err != nil {
@@ -748,8 +748,8 @@ func TestRunnerStoresProducerProvenanceAndProducerWarnings(t *testing.T) {
 	if len(producer.References) != 1 || producer.References[0].Digest != "sha256:guide" {
 		t.Fatalf("producer references = %#v", producer.References)
 	}
-	if len(store.saved.Warnings) != 1 || store.saved.Warnings[0].Scope != "producer" {
+	if len(store.saved.Diagnostics) != 1 || store.saved.Diagnostics[0].Samples[0].Scope != "producer" {
-		t.Fatalf("stored warnings = %#v, want only producer warning", store.saved.Warnings)
+		t.Fatalf("stored diagnostics = %#v, want only producer diagnostic", store.saved.Diagnostics)
 	}
 }
 

internal/framework/pipeline/runner_concurrency_test.go

@@ -201,9 +201,9 @@ func TestRunnerDiscardsOutputReturnedAfterCancellation(t *testing.T) {
 	if len(output.OutputFiles) != 0 {
 		t.Fatalf("output files = %#v, want none", output.OutputFiles)
 	}
-	for _, warning := range output.Warnings {
+	for _, group := range output.Diagnostics.Groups {
-		if warning.ReasonCode == "returned-after-cancel" {
+		if group.ReasonCode == "returned-after-cancel" {
-			t.Fatalf("output warnings include encoder warning after cancellation")
+			t.Fatalf("output diagnostics include encoder diagnostic after cancellation")
 		}
 	}
 }
@@ -367,7 +367,7 @@ func TestRunnerBoundsExtractJobsAndStabilizesReverseCompletion(t *testing.T) {
 				return erasedTypedResult{}, ctx.Err()
 			}
 			scope := fmt.Sprintf("lane-%d/chunk-%d", lane, request.Chunk.Index)
-			return erasedTypedResult{Value: typedValueForLane(lane, request.Chunk.Index), Warnings: []contracts.Warning{{Scope: scope, ReasonCode: "observed", Message: "ordered"}}, Diagnostics: []contracts.ProducerDiagnostic{{Disposition: contracts.DiagnosticDispositionObservation, Category: contracts.DiagnosticCategoryNormalization, ReasonCode: "observed", OccurrenceCount: 1, Samples: []contracts.DiagnosticSample{{Scope: scope, Message: "ordered"}}}}}, nil
+			return erasedTypedResult{Value: typedValueForLane(lane, request.Chunk.Index), Diagnostics: []contracts.ProducerDiagnostic{{Disposition: contracts.DiagnosticDispositionObservation, Category: contracts.DiagnosticCategoryNormalization, ReasonCode: "observed", OccurrenceCount: 1, Samples: []contracts.DiagnosticSample{{Scope: scope, Message: "ordered"}}}}}, nil
 		})
 	}
 
@@ -396,14 +396,6 @@ func TestRunnerBoundsExtractJobsAndStabilizesReverseCompletion(t *testing.T) {
 	if got := maximum.Load(); got != 2 {
 		t.Fatalf("maximum concurrent extract jobs = %d, want 2", got)
 	}
-	wantScopes := []string{"lane-0/chunk-0", "lane-0/chunk-1", "lane-0/chunk-2", "lane-1/chunk-0", "lane-1/chunk-1", "lane-1/chunk-2"}
-	gotScopes := make([]string, len(result.output.Warnings))
-	for i := range result.output.Warnings {
-		gotScopes[i] = result.output.Warnings[i].Scope
-	}
-	if !reflect.DeepEqual(gotScopes, wantScopes) {
-		t.Fatalf("warning order = %#v, want %#v", gotScopes, wantScopes)
-	}
 	if len(result.output.Diagnostics.Groups) != 2 {
 		t.Fatalf("diagnostic groups = %#v, want one deterministic group per lane", result.output.Diagnostics.Groups)
 	}

internal/framework/pipeline/runner_concurrent.go

@@ -24,7 +24,6 @@ type laneExtractState struct {
 	reuseEligible       bool
 	values              []erasedExtractArtifact
 	serialized          []CheckpointArtifact
-	warnings            []contracts.Warning
 	diagnostics         []contracts.DiagnosticGroup
 	rejected            []contracts.RejectedOutput
 	incomplete          []int
@@ -39,7 +38,6 @@ type laneExtractState struct {
 type finalizedExtractResults struct {
 	accepted            []erasedExtractArtifact
 	serialized          []CheckpointArtifact
-	warnings            []contracts.Warning
 	diagnostics         []contracts.DiagnosticGroup
 	rejected            []contracts.RejectedOutput
 	incomplete          []int
@@ -55,8 +53,8 @@ func loadExtract(loader CheckpointLoader, stepID, laneID, moduleKey string, deps
 	return loader.Extract(laneID, moduleKey, deps)
 }
 
-func recordExtract(recorder CheckpointRecorder, stepID, laneID, moduleKey string, deps []CheckpointFingerprint, outputs []CheckpointArtifact, rejected []contracts.RejectedOutput, warnings []contracts.Warning) error {
+func recordExtract(recorder CheckpointRecorder, stepID, laneID, moduleKey string, deps []CheckpointFingerprint, outputs []CheckpointArtifact, rejected []contracts.RejectedOutput) error {
-	return checkpointExtractSucceeded(recorder, stepID, laneID, moduleKey, deps, outputs, rejected, warnings)
+	return checkpointExtractSucceeded(recorder, stepID, laneID, moduleKey, deps, outputs, rejected)
 }
 
 type extractJob struct {
@@ -69,7 +67,6 @@ type extractJobResult struct {
 	chunkIndex           int
 	value                erasedExtractArtifact
 	serialized           CheckpointArtifact
-	warnings             []contracts.Warning
 	diagnostics          []contracts.DiagnosticGroup
 	rejected             *contracts.RejectedOutput
 	validationIncomplete bool
@@ -356,7 +353,6 @@ func hydrateRequiredLane(input RunInput, loader CheckpointLoader, doc *source.So
 		return state, err
 	}
 	hydrated := resolution.artifacts[0]
-	local.Warnings = append(local.Warnings, cloneWarnings(checkpoint.Warnings)...)
 	diagnostics, diagnosticErr := promoteCheckpointDiagnostics(hydrated.Diagnostics, contracts.DiagnosticOrigin{Stage: contracts.DiagnosticOriginStageNormalize, StepID: input.stepID, LaneID: lane.ID, ModuleKey: lane.Normalize.Module}, nil)
 	if diagnosticErr != nil {
 		return state, fmt.Errorf("promote reused accepted diagnostics: %w", diagnosticErr)
@@ -433,7 +429,7 @@ func prepareLaneExtract(input RunInput, loader CheckpointLoader, doc *source.Sou
 			}
 			state.diagnostics = append(state.diagnostics, diagnostics...)
 		}
-		state.warnings, state.rejected = cloneWarnings(cp.Warnings), cloneRejectedOutputs(cp.Rejected)
+		state.rejected = cloneRejectedOutputs(cp.Rejected)
 	}
 	return state, nil
 }
@@ -464,15 +460,14 @@ func (r *Runner) runExtractJob(ctx context.Context, input RunInput, doc *source.
 			return producerAttemptOutput{}, terminal.record(nil, attemptErr)
 		}
 		artifact := erasedExtractArtifact{LaneID: lane.ID, ExtractorKey: lane.Extract.Module, SourceID: doc.ID, ChunkID: chunk.ID, ChunkIndex: chunk.Index, ChunkRef: chunk.Ref, Value: extracted.Value}
-		attemptWarnings := cloneWarnings(extracted.Warnings)
 		serializedCandidate, encodeErr := serializeCandidateArtifact(typed.codec, artifact.LaneID, artifact.ExtractorKey, artifact.SourceID, artifact.Value)
 		if encodeErr != nil {
 			attemptErr := fmt.Errorf("serialize extract candidate for lane %q chunk %q: %w", lane.ID, chunk.ID, encodeErr)
-			payload := map[string]any{"warnings": debugWarningEnvelopes(attemptWarnings)}
+			payload := map[string]any{}
 			return producerAttemptOutput{}, terminal.record(payload, attemptErr)
 		}
 		serializedCandidate.ChunkID, serializedCandidate.ChunkIndex, serializedCandidate.ChunkRef = artifact.ChunkID, artifact.ChunkIndex, artifact.ChunkRef
-		return producerAttemptOutput{Value: extractAttemptValue{artifact: artifact, serialized: serializedCandidate, terminal: &terminal}, Candidate: extracted.ModelCandidate, Warnings: attemptWarnings, Diagnostics: contracts.CloneProducerDiagnostics(extracted.Diagnostics)}, nil
+		return producerAttemptOutput{Value: extractAttemptValue{artifact: artifact, serialized: serializedCandidate, terminal: &terminal}, Candidate: extracted.ModelCandidate, Diagnostics: contracts.CloneProducerDiagnostics(extracted.Diagnostics)}, nil
 	}, func(validationCtx context.Context, output producerAttemptOutput) (validationReport, error) {
 		candidate, ok := output.Value.(extractAttemptValue)
 		if !ok {
@@ -481,7 +476,6 @@ func (r *Runner) runExtractJob(ctx context.Context, input RunInput, doc *source.
 		report, validationErr := r.validateTypedReport(validationCtx, typed.codec, typedValidationTarget{stage: StageExtract, stepID: input.stepID, laneID: lane.ID, moduleKey: lane.Extract.Module, source: doc, sourceID: doc.ID, sourceInput: chunkInputMaterial(sourceInput, chunk), sessionID: sessionID, references: operationReferenceSet(input, lane.ExtractReferences), metadata: input.Metadata, chunk: &chunk, ref: chunk.Ref, value: candidate.artifact.Value, candidate: &candidate.serialized}, state.prepared.extractValidators, candidate.terminal.envelope.Attempt, input.Debug)
 		payload := map[string]any{
 			"output":    debugCheckpointArtifact(candidate.serialized),
-			"warnings":  debugWarningEnvelopes(append(cloneWarnings(output.Warnings), report.Warnings()...)),
 			"rejection": debugRejectedOutputPtr(typedRejection(report, typedValidationTarget{stage: StageExtract, stepID: input.stepID, laneID: lane.ID, moduleKey: lane.Extract.Module, chunk: &chunk}, candidate.terminal.envelope.Attempt)),
 		}
 		if validationErr != nil {
@@ -510,7 +504,6 @@ func (r *Runner) runExtractJob(ctx context.Context, input RunInput, doc *source.
 			result.validationSummary = &summary
 			result.rejected.Validation = cloneValidationSummaryPtr(result.validationSummary)
 		}
-		result.warnings = cloneWarnings(terminalResult.Warnings)
 		return result
 	}
 	if err == nil {
@@ -520,7 +513,7 @@ func (r *Runner) runExtractJob(ctx context.Context, input RunInput, doc *source.
 			return result
 		}
 		stored, encodeErr := checkpointArtifact(typed.codec, candidate.artifact.LaneID, candidate.artifact.ExtractorKey, candidate.artifact.SourceID, candidate.artifact.Value)
-		payload := map[string]any{"output": debugCheckpointArtifact(candidate.serialized), "warnings": debugWarningEnvelopes(terminalResult.Warnings), "rejection": debugRejectedOutputPtr(nil)}
+		payload := map[string]any{"output": debugCheckpointArtifact(candidate.serialized), "rejection": debugRejectedOutputPtr(nil)}
 		if encodeErr != nil {
 			attemptErr := fmt.Errorf("serialize accepted extract output for lane %q chunk %q: %w", lane.ID, chunk.ID, encodeErr)
 			result.err = candidate.terminal.record(payload, attemptErr)
@@ -533,7 +526,6 @@ func (r *Runner) runExtractJob(ctx context.Context, input RunInput, doc *source.
 			return result
 		}
 		result.value, result.serialized = candidate.artifact, stored
-		result.warnings = cloneWarnings(terminalResult.Warnings)
 		result.validationIncomplete = terminalResult.ValidationIncomplete
 		result.validationSummary = &summary
 	}
@@ -554,13 +546,11 @@ func finalizeLaneExtract(checkpoints CheckpointRecorder, stepID string, state *l
 		}
 		if result.rejected != nil {
 			state.rejected = append(state.rejected, *result.rejected)
-			state.warnings = append(state.warnings, result.warnings...)
 			state.diagnostics = append(state.diagnostics, result.diagnostics...)
 			continue
 		}
 		state.values = append(state.values, result.value)
 		state.serialized = append(state.serialized, result.serialized)
-		state.warnings = append(state.warnings, result.warnings...)
 		state.diagnostics = append(state.diagnostics, result.diagnostics...)
 		if result.validationIncomplete {
 			state.incomplete = append(state.incomplete, result.chunkIndex)
@@ -574,7 +564,7 @@ func finalizeLaneExtract(checkpoints CheckpointRecorder, stepID string, state *l
 		state.reuseEligible = false
 	}
 	if !state.decision.Reused && state.reuseEligible {
-		if err := recordExtract(checkpoints, stepID, lane.ID, lane.Extract.Module, state.deps, state.serialized, state.rejected, state.warnings); err != nil {
+		if err := recordExtract(checkpoints, stepID, lane.ID, lane.Extract.Module, state.deps, state.serialized, state.rejected); err != nil {
 			return fmt.Errorf("write extract checkpoint for lane %q: %w", lane.ID, err)
 		}
 	}
@@ -587,7 +577,6 @@ func (r *Runner) continueLane(ctx context.Context, input RunInput, checkpoints C
 	results := finalizedExtractResults{
 		accepted:            state.values,
 		serialized:          state.serialized,
-		warnings:            state.warnings,
 		diagnostics:         state.diagnostics,
 		rejected:            state.rejected,
 		incomplete:          state.incomplete,
@@ -595,14 +584,13 @@ func (r *Runner) continueLane(ctx context.Context, input RunInput, checkpoints C
 		decision:            state.decision,
 		reuseEligible:       state.reuseEligible,
 	}
-	local.Warnings = append(local.Warnings, cloneWarnings(results.warnings)...)
 	local.diagnosticGroups = append(local.diagnosticGroups, contracts.CloneDiagnosticCollection(contracts.DiagnosticCollection{Groups: results.diagnostics}).Groups...)
 	local.Rejected = append(local.Rejected, cloneRejectedOutputs(results.rejected)...)
 	local.ValidationSummaries = append(local.ValidationSummaries, cloneValidationSummaries(results.validationSummaries)...)
 	if err := writeDebugTimed(input.Debug, path.Join("extract", fileio.EncodePathComponent(lane.ID), "input.json"), debugTimedEnvelope{Stage: string(StageExtract), StepID: input.stepID, LaneID: lane.ID, ModuleKey: lane.Extract.Module, StartedAt: time.Now().UTC(), Payload: map[string]any{"reused": results.decision.Reused, "decision": results.decision, "source": debugSourceDocumentEnvelope(doc), "chunks": debugSourceChunkEnvelopes(chunks), "options": redactSensitiveMap(lane.Extract.Options), "metadata": redactSensitiveMap(input.Metadata)}}); err != nil {
 		return local, &laneRunError{stage: StageExtract, err: err}
 	}
-	if err := writeDebugTimed(input.Debug, path.Join("extract", fileio.EncodePathComponent(lane.ID), "output.json"), debugTimedEnvelope{Stage: string(StageExtract), StepID: input.stepID, LaneID: lane.ID, ModuleKey: lane.Extract.Module, StartedAt: time.Now().UTC(), Payload: map[string]any{"reused": results.decision.Reused, "outputs": debugCheckpointArtifacts(results.serialized), "rejected": debugRejectedOutputEnvelopes(results.rejected), "warnings": debugWarningEnvelopes(results.warnings), "validation_incomplete_chunks": append([]int(nil), results.incomplete...)}}); err != nil {
+	if err := writeDebugTimed(input.Debug, path.Join("extract", fileio.EncodePathComponent(lane.ID), "output.json"), debugTimedEnvelope{Stage: string(StageExtract), StepID: input.stepID, LaneID: lane.ID, ModuleKey: lane.Extract.Module, StartedAt: time.Now().UTC(), Payload: map[string]any{"reused": results.decision.Reused, "outputs": debugCheckpointArtifacts(results.serialized), "rejected": debugRejectedOutputEnvelopes(results.rejected), "validation_incomplete_chunks": append([]int(nil), results.incomplete...)}}); err != nil {
 		return local, &laneRunError{stage: StageExtract, err: err}
 	}
 	if len(results.accepted) == 0 {
@@ -667,7 +655,6 @@ func mergeLaneOutput(dst *RunOutput, src RunOutput) error {
 	}
 	dst.NormalizeOutputs = append(dst.NormalizeOutputs, cloneSerializedOutputs(src.NormalizeOutputs)...)
 	dst.Rejected = append(dst.Rejected, cloneRejectedOutputs(src.Rejected)...)
-	dst.Warnings = append(dst.Warnings, cloneWarnings(src.Warnings)...)
 	appendDiagnosticGroups(dst, src.diagnosticGroups)
 	dst.CheckpointEvents = append(dst.CheckpointEvents, src.CheckpointEvents...)
 	dst.ValidationSummaries = append(dst.ValidationSummaries, cloneValidationSummaries(src.ValidationSummaries)...)

internal/framework/pipeline/runner_extract_correction_test.go

@@ -4,7 +4,6 @@ import (
 	"context"
 	"encoding/json"
 	"fmt"
-	"reflect"
 	"strings"
 	"sync"
 	"testing"
@@ -85,15 +84,6 @@ func TestRunnerCorrectsExtractCandidatesIndependentlyPerChunk(t *testing.T) {
 	}
 }
 
-func containsWarnings(have, want []contracts.Warning) bool {
-	for index := 0; index+len(want) <= len(have); index++ {
-		if reflect.DeepEqual(have[index:index+len(want)], want) {
-			return true
-		}
-	}
-	return false
-}
-
 func containsValidationSummary(summaries []artifacts.ValidationSummary, status string) bool {
 	for _, summary := range summaries {
 		if summary.Status == status {
@@ -126,8 +116,8 @@ func TestRunnerContinuesValidationIncompleteExtractWithoutCheckpoint(t *testing.
 	if output.Manifest.ValidationStatus != "incomplete" || !containsValidationSummary(output.Manifest.ValidationSummaries, "incomplete") {
 		t.Fatalf("manifest validation = %#v, want incomplete extract provenance", output.Manifest)
 	}
-	if got, want := output.Warnings, []contracts.Warning{{Scope: "typed/check", ReasonCode: "validator_execution_incomplete", Message: "Validator execution did not complete within its configured budget."}}; !containsWarnings(got, want) {
+	if len(output.Diagnostics.Groups) != 1 || output.Diagnostics.Groups[0].ReasonCode != "validator_execution_incomplete" {
-		t.Fatalf("warnings = %#v, want %#v", got, want)
+		t.Fatalf("diagnostics = %#v, want validation-incomplete group", output.Diagnostics)
 	}
 	if len(recorder.checkpoint.Outputs) != 0 || len(recorder.checkpoint.Rejected) != 0 {
 		t.Fatalf("extract checkpoint = %#v, want no persisted incomplete output", recorder.checkpoint)

internal/framework/pipeline/runner_extract_handoff_test.go

@@ -35,11 +35,10 @@ func (v *mutatingMetadataValidator) Validate(_ context.Context, request contract
 	return contracts.ValidationResult{Approved: true}, nil
 }
 
-func (r *extractCaptureRecorder) ExtractSucceeded(_ string, _ string, _ []CheckpointFingerprint, outputs []CheckpointArtifact, rejected []contracts.RejectedOutput, warnings []contracts.Warning) error {
+func (r *extractCaptureRecorder) ExtractSucceeded(_ string, _ string, _ []CheckpointFingerprint, outputs []CheckpointArtifact, rejected []contracts.RejectedOutput) error {
 	r.checkpoint = ExtractCheckpoint{
 		Outputs:  cloneCheckpointArtifacts(outputs),
 		Rejected: cloneRejectedOutputs(rejected),
-		Warnings: cloneWarnings(warnings),
 	}
 	return nil
 }
@@ -56,7 +55,6 @@ func (l *extractResultLoader) Extract(string, string, []CheckpointFingerprint) (
 	return ExtractCheckpoint{
 		Outputs:  cloneCheckpointArtifacts(l.checkpoint.Outputs),
 		Rejected: cloneRejectedOutputs(l.checkpoint.Rejected),
-		Warnings: cloneWarnings(l.checkpoint.Warnings),
 	}, l.decision
 }
 
@@ -157,7 +155,6 @@ func TestRunnerContinuesFromFreshAndReusedExtractResults(t *testing.T) {
 		extractCalls++
 		return erasedTypedResult{
 			Value: typedValueForLane(0, request.Chunk.Index),
-			Warnings: []contracts.Warning{{Scope: "extract", ReasonCode: "observed", Message: "accepted extract"}},
 			Diagnostics: []contracts.ProducerDiagnostic{{
 				Disposition:     contracts.DiagnosticDispositionObservation,
 				Category:        contracts.DiagnosticCategoryNormalization,
@@ -213,15 +210,12 @@ func TestRunnerContinuesFromFreshAndReusedExtractResults(t *testing.T) {
 	if !reflect.DeepEqual(reused.NormalizeOutputs, fresh.NormalizeOutputs) {
 		t.Fatalf("reused normalize outputs = %#v, want fresh outputs %#v", reused.NormalizeOutputs, fresh.NormalizeOutputs)
 	}
-	if !reflect.DeepEqual(reused.Warnings, fresh.Warnings) {
-		t.Fatalf("reused warnings = %#v, want fresh warnings %#v", reused.Warnings, fresh.Warnings)
-	}
 	if !reflect.DeepEqual(reused.Diagnostics, fresh.Diagnostics) {
 		t.Fatalf("reused diagnostics = %#v, want fresh diagnostics %#v", reused.Diagnostics, fresh.Diagnostics)
 	}
 }
 
-func TestRunnerPromotesOnlyAcceptedExtractRetryWarnings(t *testing.T) {
+func TestRunnerPromotesOnlyAcceptedExtractRetryDiagnostics(t *testing.T) {
 	prepared := preparedAttemptDebugPipeline(t)
 	prepared.Steps[0].lanes[0].resolved.Extract.Retries = 1
 	attempts := 0
@@ -233,7 +227,7 @@ func TestRunnerPromotesOnlyAcceptedExtractRetryWarnings(t *testing.T) {
 		}
 		return erasedTypedResult{
 			Value:          typedValueForLane(0, request.Chunk.Index),
-			Warnings:       []contracts.Warning{{Scope: scope, ReasonCode: "observed", Message: scope}},
+			Diagnostics:    []contracts.ProducerDiagnostic{producerDiagnostic(scope, scope)},
 			ModelCandidate: attemptCandidate(t, fmt.Sprintf(`{"items":["%s"]}`, scope)),
 		}, nil
 	})
@@ -250,8 +244,8 @@ func TestRunnerPromotesOnlyAcceptedExtractRetryWarnings(t *testing.T) {
 	if attempts != 2 {
 		t.Fatalf("extract attempts = %d, want 2", attempts)
 	}
-	if len(output.Warnings) != 1 || output.Warnings[0].Scope != "accepted" {
+	if len(output.Diagnostics.Groups) != 1 || output.Diagnostics.Groups[0].Samples[0].Scope != "accepted" {
-		t.Fatalf("promoted warnings = %#v, want accepted attempt only", output.Warnings)
+		t.Fatalf("promoted diagnostics = %#v, want accepted attempt only", output.Diagnostics)
 	}
 	assertAttemptEnvelopeSequence(t, debug, "extract/notes/chunk-000001", 1, 2)
 	first := debug.envelope(t, "extract/notes/chunk-000001/attempt-01.json")

internal/framework/pipeline/runner_normalize_retry_test.go

@@ -17,7 +17,7 @@ func TestRunnerHandlesRetryableNormalizeFallbacks(t *testing.T) {
 		validator      *preparedValidator
 		wantCalls      int
 		wantItem       string
-		wantWarnings   []string
+		wantMessages   []string
 		wantRejected   int
 		wantDebug      []string
 		wantCheckpoint int
@@ -30,7 +30,7 @@ func TestRunnerHandlesRetryableNormalizeFallbacks(t *testing.T) {
 			},
 			wantCalls:      1,
 			wantItem:       "fallback",
-			wantWarnings:   []string{"ordinary", "fallback-warning"},
+			wantMessages:   []string{"ordinary", "fallback-warning"},
 			wantDebug:      []string{`"another_attempt":false`, `"fallback_accepted":true`},
 			wantCheckpoint: 1,
 		},
@@ -41,11 +41,11 @@ func TestRunnerHandlesRetryableNormalizeFallbacks(t *testing.T) {
 				if attempt == 1 {
 					return retryableNormalizeResult("discarded", "discarded-ordinary", "discarded-fallback")
 				}
-				return erasedTypedResult{Value: codecNotes{Items: []string{"accepted"}}, Warnings: []contracts.Warning{{Scope: "accepted", ReasonCode: "ordinary", Message: "accepted-warning"}}}
+				return erasedTypedResult{Value: codecNotes{Items: []string{"accepted"}}, Diagnostics: []contracts.ProducerDiagnostic{producerDiagnostic("accepted", "accepted-warning")}}
 			},
 			wantCalls:      2,
 			wantItem:       "accepted",
-			wantWarnings:   []string{"accepted-warning"},
+			wantMessages:   []string{"accepted-warning"},
 			wantDebug:      []string{`"another_attempt":true`, `"fallback_accepted":false`},
 			wantCheckpoint: 1,
 		},
@@ -57,7 +57,7 @@ func TestRunnerHandlesRetryableNormalizeFallbacks(t *testing.T) {
 			},
 			wantCalls:      2,
 			wantItem:       "fallback-2",
-			wantWarnings:   []string{"ordinary-2", "fallback-warning-2"},
+			wantMessages:   []string{"ordinary-2", "fallback-warning-2"},
 			wantDebug:      []string{`"another_attempt":false`, `"fallback_accepted":true`},
 			wantCheckpoint: 1,
 		},
@@ -140,12 +140,14 @@ func TestRunnerHandlesRetryableNormalizeFallbacks(t *testing.T) {
 			if got := firstNote(normalized); got != tc.wantItem {
 				t.Fatalf("normalized item = %q, want %q", got, tc.wantItem)
 			}
-			gotWarnings := make([]string, len(output.Warnings))
+			var gotMessages []string
-			for index, warning := range output.Warnings {
+			for _, group := range output.Diagnostics.Groups {
-				gotWarnings[index] = warning.Message
+				for _, sample := range group.Samples {
+					gotMessages = append(gotMessages, sample.Message)
 				}
-			if strings.Join(gotWarnings, "|") != strings.Join(tc.wantWarnings, "|") {
+			}
-				t.Fatalf("durable warnings = %#v, want %#v", gotWarnings, tc.wantWarnings)
+			if strings.Join(gotMessages, "|") != strings.Join(tc.wantMessages, "|") {
+				t.Fatalf("durable diagnostics = %#v, want %#v", gotMessages, tc.wantMessages)
 			}
 		})
 	}
@@ -263,11 +265,11 @@ func TestRunnerValidatesNormalizeRetryDiagnostics(t *testing.T) {
 func retryableNormalizeResult(item, ordinary, fallback string) erasedTypedResult {
 	return erasedTypedResult{
 		Value:       codecNotes{Items: []string{item}},
-		Warnings: []contracts.Warning{{Scope: "attempt", ReasonCode: "ordinary", Message: ordinary}},
+		Diagnostics: []contracts.ProducerDiagnostic{producerDiagnostic("attempt", ordinary)},
 		Retry: &contracts.NormalizeRetry{
 			ReasonCode:          "retryable_normalization",
 			Message:             "safe fallback is available",
-			FallbackWarnings: []contracts.Warning{{Scope: "fallback", ReasonCode: "fallback", Message: fallback}},
+			FallbackDiagnostics: []contracts.ProducerDiagnostic{producerDiagnostic("fallback", fallback)},
 		},
 	}
 }

internal/framework/pipeline/runner_rejection_warnings_test.go

@@ -11,19 +11,19 @@ import (
 	"gitea.maximumdirect.net/eric/notarius/internal/framework/contracts"
 )
 
-type warningChunker struct {
+type diagnosticChunker struct {
 	key   string
 	plan  source.ChunkPlan
 	calls int
 }
 
-func (c *warningChunker) Key() string                             { return c.key }
+func (c *diagnosticChunker) Key() string                             { return c.key }
-func (*warningChunker) ReferenceSlots() []contracts.ReferenceSlot { return nil }
+func (*diagnosticChunker) ReferenceSlots() []contracts.ReferenceSlot { return nil }
-func (c *warningChunker) Plan(context.Context, contracts.ChunkRequest) (contracts.ChunkPlanResult, error) {
+func (c *diagnosticChunker) Plan(context.Context, contracts.ChunkRequest) (contracts.ChunkPlanResult, error) {
 	c.calls++
 	return contracts.ChunkPlanResult{
 		Plan:        source.CloneChunkPlan(c.plan),
-		Warnings: []contracts.Warning{{Scope: fmt.Sprintf("operation-%d", c.calls), ReasonCode: "operation", Message: "operation warning"}},
+		Diagnostics: []contracts.ProducerDiagnostic{producerDiagnostic(fmt.Sprintf("operation-%d", c.calls), "operation diagnostic")},
 	}, nil
 }
 
@@ -40,14 +40,14 @@ func (v chunkValidationFunc) Validate(ctx context.Context, request contracts.Chu
 	return v.validate(ctx, request)
 }
 
-func TestRunnerPromotesOnlyTerminalRejectionWarnings(t *testing.T) {
+func TestRunnerPromotesOnlyTerminalRejectionDiagnostics(t *testing.T) {
 	for _, target := range []ModuleStage{StageChunk, StageExtract, StageMerge, StageNormalize} {
 		t.Run(string(target), func(t *testing.T) {
 			prepared := preparedAttemptDebugPipeline(t)
 			lane := &prepared.Steps[0].lanes[0]
 			attempts := 0
 			first := func() contracts.ValidationResult {
-				return contracts.ValidationResult{Approved: true, Warnings: []contracts.Warning{{Scope: fmt.Sprintf("validator-%d", attempts), ReasonCode: "validator", Message: "validator warning"}}}
+				return contracts.ValidationResult{Approved: true, Diagnostics: []contracts.ProducerDiagnostic{producerDiagnostic(fmt.Sprintf("validator-%d", attempts), "validator diagnostic")}}
 			}
 			reject := func() contracts.ValidationResult {
 				return contracts.ValidationResult{Approved: false, ReasonCode: "rejected", Message: "rejected", CorrectionGuidance: "return an acceptable candidate"}
@@ -59,7 +59,7 @@ func TestRunnerPromotesOnlyTerminalRejectionWarnings(t *testing.T) {
 			case StageChunk:
 				prepared.resolved.ChunkValidationPolicy.SemanticRejection = SemanticRejectionRejectOutput
 				chunker := prepared.chunker.(*typedTestChunker)
-				prepared.chunker = &warningChunker{key: prepared.resolved.Chunk.Module, plan: source.CloneChunkPlan(chunker.plan)}
+				prepared.chunker = &diagnosticChunker{key: prepared.resolved.Chunk.Module, plan: source.CloneChunkPlan(chunker.plan)}
 				prepared.resolved.Chunk.Retries = 1
 				prepared.chunkValidators.validators = []preparedValidator{
 					{resolved: ResolvedValidator{Binding: Binding("warning-approval"), Target: ValidatorTargetChunk}, chunk: chunkValidationFunc{name: "warning-approval", validate: func(context.Context, contracts.ChunkValidationRequest) (contracts.ValidationResult, error) {
@@ -69,34 +69,34 @@ func TestRunnerPromotesOnlyTerminalRejectionWarnings(t *testing.T) {
 						return reject(), nil
 					}}},
 				}
-				chunkerWithWarnings := prepared.chunker.(*warningChunker)
+				chunkerWithDiagnostics := prepared.chunker.(*diagnosticChunker)
 				first = func() contracts.ValidationResult {
-					return contracts.ValidationResult{Approved: true, Warnings: []contracts.Warning{{Scope: fmt.Sprintf("validator-%d", chunkerWithWarnings.calls), ReasonCode: "validator", Message: "validator warning"}}}
+					return contracts.ValidationResult{Approved: true, Diagnostics: []contracts.ProducerDiagnostic{producerDiagnostic(fmt.Sprintf("validator-%d", chunkerWithDiagnostics.calls), "validator diagnostic")}}
 				}
 			case StageExtract:
 				lane.resolved.Extract.Retries = 1
 				lane.resolved.ExtractValidationPolicy.SemanticRejection = SemanticRejectionRejectOutput
 				installExtractOperation(prepared, 0, func(context.Context, contracts.TypedExtractionRequest) (erasedTypedResult, error) {
 					attempts++
-					return erasedTypedResult{Value: codecNotes{Items: []string{"extract"}}, Warnings: []contracts.Warning{{Scope: fmt.Sprintf("operation-%d", attempts), ReasonCode: "operation", Message: "operation warning"}}, ModelCandidate: attemptCandidate(t, fmt.Sprintf(`{"items":["%d"]}`, attempts))}, nil
+					return erasedTypedResult{Value: codecNotes{Items: []string{"extract"}}, Diagnostics: []contracts.ProducerDiagnostic{producerDiagnostic(fmt.Sprintf("operation-%d", attempts), "operation diagnostic")}, ModelCandidate: attemptCandidate(t, fmt.Sprintf(`{"items":["%d"]}`, attempts))}, nil
 				})
-				lane.extractValidators.validators = rejectionWarningTypedValidators(first, reject)
+				lane.extractValidators.validators = rejectionDiagnosticTypedValidators(first, reject)
 			case StageMerge:
 				lane.resolved.Merge.Retries = 1
 				lane.resolved.MergeValidationPolicy.SemanticRejection = SemanticRejectionRejectOutput
 				lane.typed.merge = func(context.Context, any, contracts.TypedMergeRequest[any]) (erasedTypedResult, error) {
 					attempts++
-					return erasedTypedResult{Value: codecNotes{Items: []string{"merge"}}, Warnings: []contracts.Warning{{Scope: fmt.Sprintf("operation-%d", attempts), ReasonCode: "operation", Message: "operation warning"}}, ModelCandidate: attemptCandidate(t, fmt.Sprintf(`{"items":["%d"]}`, attempts))}, nil
+					return erasedTypedResult{Value: codecNotes{Items: []string{"merge"}}, Diagnostics: []contracts.ProducerDiagnostic{producerDiagnostic(fmt.Sprintf("operation-%d", attempts), "operation diagnostic")}, ModelCandidate: attemptCandidate(t, fmt.Sprintf(`{"items":["%d"]}`, attempts))}, nil
 				}
-				lane.mergeValidators.validators = rejectionWarningTypedValidators(first, reject)
+				lane.mergeValidators.validators = rejectionDiagnosticTypedValidators(first, reject)
 			case StageNormalize:
 				lane.resolved.Normalize.Retries = 1
 				lane.resolved.NormalizeValidationPolicy.SemanticRejection = SemanticRejectionRejectOutput
 				lane.typed.normalize = func(context.Context, any, contracts.TypedNormalizeRequest[any]) (erasedTypedResult, error) {
 					attempts++
-					return erasedTypedResult{Value: codecNotes{Items: []string{"normalize"}}, Warnings: []contracts.Warning{{Scope: fmt.Sprintf("operation-%d", attempts), ReasonCode: "operation", Message: "operation warning"}}, ModelCandidate: attemptCandidate(t, fmt.Sprintf(`{"items":["%d"]}`, attempts))}, nil
+					return erasedTypedResult{Value: codecNotes{Items: []string{"normalize"}}, Diagnostics: []contracts.ProducerDiagnostic{producerDiagnostic(fmt.Sprintf("operation-%d", attempts), "operation diagnostic")}, ModelCandidate: attemptCandidate(t, fmt.Sprintf(`{"items":["%d"]}`, attempts))}, nil
 				}
-				lane.normalizeValidators.validators = rejectionWarningTypedValidators(first, reject)
+				lane.normalizeValidators.validators = rejectionDiagnosticTypedValidators(first, reject)
 			}
 
 			output, err := New().Run(context.Background(), RunInput{Prepared: prepared, RawInput: []byte("input"), Checkpoints: recorder, Debug: debug})
@@ -109,29 +109,26 @@ func TestRunnerPromotesOnlyTerminalRejectionWarnings(t *testing.T) {
 				wantScopes = []string{"operation-1", "validator-1"}
 				wantAttempts = 1
 			}
-			if got := rejectionWarningScopes(output.Warnings); !reflect.DeepEqual(got, wantScopes) {
+			if got := rejectionDiagnosticScopes(output.Diagnostics.Groups); !reflect.DeepEqual(got, wantScopes) {
-				t.Fatalf("published warning scopes = %#v, want %#v", got, wantScopes)
+				t.Fatalf("published diagnostic scopes = %#v, want %#v", got, wantScopes)
 			}
 			if len(output.Rejected) != 1 || output.Rejected[0].AttemptCount != wantAttempts {
 				t.Fatalf("rejections = %#v, want terminal rejection after %d attempt(s)", output.Rejected, wantAttempts)
 			}
-			if target == StageExtract && !reflect.DeepEqual(rejectionWarningScopes(recorder.checkpoint.Warnings), wantScopes) {
-				t.Fatalf("extract checkpoint warnings = %#v, want %#v", recorder.checkpoint.Warnings, wantScopes)
-			}
 			attemptPath := fmt.Sprintf("%s/notes/attempt-01.json", target)
 			if target == StageChunk {
 				attemptPath = "chunk/attempt-01.json"
 			} else if target == StageExtract {
 				attemptPath = "extract/notes/chunk-000001/attempt-01.json"
 			}
-			if !strings.Contains(string(debug.json[attemptPath]), "operation-1") || !strings.Contains(string(debug.json[attemptPath]), "validator-1") {
+			if !strings.Contains(string(debug.json[attemptPath]), "rejection") {
-				t.Fatalf("first attempt debug = %s, want discarded warnings", debug.json[attemptPath])
+				t.Fatalf("first attempt debug = %s, want rejection", debug.json[attemptPath])
 			}
 		})
 	}
 }
 
-func rejectionWarningTypedValidators(first func() contracts.ValidationResult, reject func() contracts.ValidationResult) []preparedValidator {
+func rejectionDiagnosticTypedValidators(first func() contracts.ValidationResult, reject func() contracts.ValidationResult) []preparedValidator {
 	return []preparedValidator{
 		{resolved: ResolvedValidator{Binding: Binding("warning-approval"), Target: ValidatorTargetTyped, ArtifactKind: "test/notes"}, typedValidate: func(context.Context, any, typedValidationTarget) (contracts.ValidationResult, error) {
 			return first(), nil
@@ -142,10 +139,10 @@ func rejectionWarningTypedValidators(first func() contracts.ValidationResult, re
 	}
 }
 
-func rejectionWarningScopes(warnings []contracts.Warning) []string {
+func rejectionDiagnosticScopes(groups []contracts.DiagnosticGroup) []string {
-	scopes := make([]string, len(warnings))
+	scopes := make([]string, len(groups))
-	for index := range warnings {
+	for index := range groups {
-		scopes[index] = warnings[index].Scope
+		scopes[index] = groups[index].Samples[0].Scope
 	}
 	return scopes
 }

internal/framework/pipeline/runner_reuse_lineage_test.go

@@ -61,7 +61,7 @@ func (s *reuseLineageCheckpointSpy) ExtractRunning(laneID, _ string, _ []Checkpo
 	return nil
 }
 
-func (s *reuseLineageCheckpointSpy) ExtractSucceeded(laneID, _ string, _ []CheckpointFingerprint, _ []CheckpointArtifact, _ []contracts.RejectedOutput, _ []contracts.Warning) error {
+func (s *reuseLineageCheckpointSpy) ExtractSucceeded(laneID, _ string, _ []CheckpointFingerprint, _ []CheckpointArtifact, _ []contracts.RejectedOutput) error {
 	s.write("extract", "succeeded", laneID)
 	return nil
 }
@@ -76,7 +76,7 @@ func (s *reuseLineageCheckpointSpy) MergeRunning(laneID, _ string, _ []Checkpoin
 	return nil
 }
 
-func (s *reuseLineageCheckpointSpy) MergeSucceeded(laneID, _ string, _ []CheckpointFingerprint, _ CheckpointArtifact, _ []contracts.Warning) error {
+func (s *reuseLineageCheckpointSpy) MergeSucceeded(laneID, _ string, _ []CheckpointFingerprint, _ CheckpointArtifact) error {
 	s.write("merge", "succeeded", laneID)
 	return nil
 }
@@ -96,7 +96,7 @@ func (s *reuseLineageCheckpointSpy) NormalizeRunning(laneID, _ string, _ []Check
 	return nil
 }
 
-func (s *reuseLineageCheckpointSpy) NormalizeSucceeded(laneID, _ string, _ []CheckpointFingerprint, _ CheckpointArtifact, _ []contracts.Warning) error {
+func (s *reuseLineageCheckpointSpy) NormalizeSucceeded(laneID, _ string, _ []CheckpointFingerprint, _ CheckpointArtifact) error {
 	s.write("normalize", "succeeded", laneID)
 	return nil
 }

internal/framework/pipeline/runner_semantic_correction_test.go

@@ -120,7 +120,7 @@ func TestRunnerContinuesNormalizeAfterValidatorFailure(t *testing.T) {
 	if output.Manifest.ValidationStatus != "incomplete" || !containsValidationSummary(output.Manifest.ValidationSummaries, "incomplete") {
 		t.Fatalf("manifest validation = %#v, want incomplete normalization provenance", output.Manifest)
 	}
-	if got, want := output.Warnings, []contracts.Warning{{Scope: "unavailable", ReasonCode: "validator_execution_incomplete", Message: "Validator execution did not complete within its configured budget."}}; !containsWarnings(got, want) {
+	if len(output.Diagnostics.Groups) != 1 || output.Diagnostics.Groups[0].ReasonCode != "validator_execution_incomplete" {
-		t.Fatalf("warnings = %#v, want %#v", got, want)
+		t.Fatalf("diagnostics = %#v, want validation-incomplete group", output.Diagnostics)
 	}
 }

internal/framework/pipeline/runner_terminal_debug_test.go

@@ -16,7 +16,6 @@ import (
 type terminalChunker struct {
 	key         string
 	plan        source.ChunkPlan
-	warnings    []contracts.Warning
 	diagnostics []contracts.ProducerDiagnostic
 	err         error
 	calls       *int
@@ -30,7 +29,7 @@ func (c terminalChunker) Plan(context.Context, contracts.ChunkRequest) (contract
 	if c.calls != nil {
 		(*c.calls)++
 	}
-	return contracts.ChunkPlanResult{Plan: source.CloneChunkPlan(c.plan), Warnings: cloneWarnings(c.warnings), Diagnostics: contracts.CloneProducerDiagnostics(c.diagnostics)}, c.err
+	return contracts.ChunkPlanResult{Plan: source.CloneChunkPlan(c.plan), Diagnostics: contracts.CloneProducerDiagnostics(c.diagnostics)}, c.err
 }
 
 type terminalChunkValidator struct {
@@ -168,7 +167,7 @@ func TestRunnerRecordsChunkTerminalOutcomes(t *testing.T) {
 	for _, tc := range tests {
 		t.Run(tc.name, func(t *testing.T) {
 			prepared, plan := preparedTerminalDebugPipeline(t)
-			prepared.chunker = terminalChunker{key: prepared.resolved.Chunk.Module, plan: plan, warnings: []contracts.Warning{{Scope: "chunk", ReasonCode: "observed", Message: "chunk warning"}}, err: tc.moduleError}
+			prepared.chunker = terminalChunker{key: prepared.resolved.Chunk.Module, plan: plan, diagnostics: []contracts.ProducerDiagnostic{producerDiagnostic("chunk", "chunk diagnostic")}, err: tc.moduleError}
 			prepared.chunkValidators.validators = []preparedValidator{{resolved: ResolvedValidator{Binding: Binding("terminal/chunk-validator"), Target: ValidatorTargetChunk}, chunk: tc.validator}}
 			debug := newCapturedDebugRecorder()
 
@@ -337,7 +336,7 @@ func TestRunnerRecordsExtractTerminalOutcomes(t *testing.T) {
 				if tc.moduleError != nil {
 					return erasedTypedResult{}, tc.moduleError
 				}
-				return erasedTypedResult{Value: codecNotes{Items: []string{value}}, Warnings: []contracts.Warning{{Scope: "extract", ReasonCode: "observed", Message: "extract warning"}}}, nil
+				return erasedTypedResult{Value: codecNotes{Items: []string{value}}, Diagnostics: []contracts.ProducerDiagnostic{producerDiagnostic("extract", "extract diagnostic")}}, nil
 			})
 			prepared.Steps[0].lanes[0].extractValidators.validators = []preparedValidator{{
 				resolved: ResolvedValidator{Binding: Binding("terminal/extract-validator"), Target: ValidatorTargetTyped, ArtifactKind: "test/notes"},
@@ -369,9 +368,6 @@ func TestRunnerRecordsExtractTerminalOutcomes(t *testing.T) {
 					t.Fatalf("extract rejection = envelope %#v, outputs %#v", envelope, output.Rejected)
 				}
 			}
-			if tc.moduleError == nil && !strings.Contains(string(debug.json[attemptPath]), "extract warning") {
-				t.Fatalf("attempt envelope = %s, want attempt warning", debug.json[attemptPath])
-			}
 		})
 	}
 }

internal/framework/pipeline/runner_typed.go

@@ -29,11 +29,11 @@ func loadNormalize(loader CheckpointLoader, stepID, laneID, moduleKey string, de
 	}
 	return loader.Normalize(laneID, moduleKey, deps)
 }
-func recordMerge(recorder CheckpointRecorder, stepID, laneID, moduleKey string, deps []CheckpointFingerprint, output CheckpointArtifact, warnings []contracts.Warning) error {
+func recordMerge(recorder CheckpointRecorder, stepID, laneID, moduleKey string, deps []CheckpointFingerprint, output CheckpointArtifact) error {
-	return checkpointMergeSucceeded(recorder, stepID, laneID, moduleKey, deps, output, warnings)
+	return checkpointMergeSucceeded(recorder, stepID, laneID, moduleKey, deps, output)
 }
-func recordNormalize(recorder CheckpointRecorder, stepID, laneID, moduleKey string, deps []CheckpointFingerprint, output CheckpointArtifact, warnings []contracts.Warning) error {
+func recordNormalize(recorder CheckpointRecorder, stepID, laneID, moduleKey string, deps []CheckpointFingerprint, output CheckpointArtifact) error {
-	return checkpointNormalizeSucceeded(recorder, stepID, laneID, moduleKey, deps, output, warnings)
+	return checkpointNormalizeSucceeded(recorder, stepID, laneID, moduleKey, deps, output)
 }
 func cloneCheckpointArtifact(output CheckpointArtifact) CheckpointArtifact {
 	output.Artifact = contracts.CloneSerializedArtifact(output.Artifact)
@@ -265,12 +265,9 @@ func (r *Runner) runMergeStage(ctx context.Context, input RunInput, checkpoints
 	}
 	var merged erasedMergeArtifact
 	var serializedMerge CheckpointArtifact
-	var mergeWarnings []contracts.Warning
 	if mergeDecision.Reused {
 		merged = erasedMergeArtifact{LaneID: lane.ID, MergerKey: lane.Merge.Module, SourceID: doc.ID, Value: mergeResolution.values[0]}
 		serializedMerge = mergeResolution.artifacts[0]
-		mergeWarnings = cloneWarnings(mergeCP.Warnings)
-		output.Warnings = append(output.Warnings, mergeWarnings...)
 		diagnostics, diagnosticErr := promoteCheckpointDiagnostics(serializedMerge.Diagnostics, contracts.DiagnosticOrigin{Stage: contracts.DiagnosticOriginStageMerge, StepID: input.stepID, LaneID: lane.ID, ModuleKey: lane.Merge.Module}, nil)
 		if diagnosticErr != nil {
 			return stageResult, fmt.Errorf("promote reused merge diagnostics: %w", diagnosticErr)
@@ -296,12 +293,11 @@ func (r *Runner) runMergeStage(ctx context.Context, input RunInput, checkpoints
 				return producerAttemptOutput{}, terminal.record(nil, fmt.Errorf("merge lane %q with merger %q: %w", lane.ID, lane.Merge.Module, callErr))
 			}
 			candidate := erasedMergeArtifact{LaneID: lane.ID, MergerKey: lane.Merge.Module, SourceID: doc.ID, Value: result.Value}
-			warnings := cloneWarnings(result.Warnings)
 			serializedCandidate, encodeErr := serializeCandidateArtifact(typed.codec, candidate.LaneID, candidate.MergerKey, candidate.SourceID, candidate.Value)
 			if encodeErr != nil {
-				return producerAttemptOutput{}, terminal.record(map[string]any{"warnings": debugWarningEnvelopes(warnings)}, fmt.Errorf("serialize merge candidate for lane %q: %w", lane.ID, encodeErr))
+				return producerAttemptOutput{}, terminal.record(nil, fmt.Errorf("serialize merge candidate for lane %q: %w", lane.ID, encodeErr))
 			}
-			return producerAttemptOutput{Value: mergeAttemptValue{artifact: candidate, candidate: serializedCandidate, terminal: &terminal}, Candidate: result.ModelCandidate, Warnings: warnings, Diagnostics: contracts.CloneProducerDiagnostics(result.Diagnostics)}, nil
+			return producerAttemptOutput{Value: mergeAttemptValue{artifact: candidate, candidate: serializedCandidate, terminal: &terminal}, Candidate: result.ModelCandidate, Diagnostics: contracts.CloneProducerDiagnostics(result.Diagnostics)}, nil
 		}, func(validationCtx context.Context, output producerAttemptOutput) (validationReport, error) {
 			candidate, ok := output.Value.(mergeAttemptValue)
 			if !ok {
@@ -309,7 +305,7 @@ func (r *Runner) runMergeStage(ctx context.Context, input RunInput, checkpoints
 			}
 			target := typedValidationTarget{stage: StageMerge, stepID: input.stepID, laneID: lane.ID, moduleKey: lane.Merge.Module, source: doc, sourceID: doc.ID, sourceInput: sourceInput.Clone(), sessionID: sessionID, references: mergeReferences, metadata: input.Metadata, value: candidate.artifact.Value, candidate: &candidate.candidate}
 			report, validationErr := r.validateTypedReport(validationCtx, typed.codec, target, prepared.mergeValidators, candidate.terminal.envelope.Attempt, input.Debug)
-			payload := map[string]any{"output": debugCheckpointArtifact(candidate.candidate), "warnings": debugWarningEnvelopes(append(cloneWarnings(output.Warnings), report.Warnings()...)), "rejection": debugRejectedOutputPtr(typedRejection(report, target, candidate.terminal.envelope.Attempt))}
+			payload := map[string]any{"output": debugCheckpointArtifact(candidate.candidate), "rejection": debugRejectedOutputPtr(typedRejection(report, target, candidate.terminal.envelope.Attempt))}
 			if validationErr != nil {
 				return report, candidate.terminal.record(payload, validationErr)
 			}
@@ -340,7 +336,6 @@ func (r *Runner) runMergeStage(ctx context.Context, input RunInput, checkpoints
 			rejected.Stage, rejected.StepID, rejected.LaneID, rejected.ModuleKey = string(StageMerge), input.stepID, lane.ID, lane.Merge.Module
 			rejected.Validation = &terminalSummary
 			output.ValidationSummaries = append(output.ValidationSummaries, artifacts.CloneValidationSummary(terminalSummary))
-			output.Warnings = append(output.Warnings, terminalResult.Warnings...)
 			appendDiagnosticGroups(output, terminalDiagnostics)
 			output.Rejected = append(output.Rejected, *rejected)
 			if stageResult.reuseEligible {
@@ -356,7 +351,7 @@ func (r *Runner) runMergeStage(ctx context.Context, input RunInput, checkpoints
 			return stageResult, fmt.Errorf("merge attempt terminal has incompatible value")
 		}
 		stored, encodeErr := checkpointArtifact(typed.codec, candidate.artifact.LaneID, candidate.artifact.MergerKey, candidate.artifact.SourceID, candidate.artifact.Value)
-		payload := map[string]any{"output": debugCheckpointArtifact(candidate.candidate), "warnings": debugWarningEnvelopes(terminalResult.Warnings), "rejection": debugRejectedOutputPtr(nil)}
+		payload := map[string]any{"output": debugCheckpointArtifact(candidate.candidate), "rejection": debugRejectedOutputPtr(nil)}
 		if encodeErr != nil {
 			attemptErr := fmt.Errorf("serialize accepted merge output for lane %q: %w", lane.ID, encodeErr)
 			if stageResult.reuseEligible {
@@ -372,21 +367,19 @@ func (r *Runner) runMergeStage(ctx context.Context, input RunInput, checkpoints
 			return stageResult, debugErr
 		}
 		merged, serializedMerge = candidate.artifact, stored
-		mergeWarnings = cloneWarnings(terminalResult.Warnings)
 		output.ValidationSummaries = append(output.ValidationSummaries, terminalSummary)
 		stageResult.validationIncomplete = terminalResult.ValidationIncomplete
 		if stageResult.validationIncomplete {
 			stageResult.reuseEligible = false
 		}
-		output.Warnings = append(output.Warnings, mergeWarnings...)
 		appendDiagnosticGroups(output, terminalDiagnostics)
 		if stageResult.reuseEligible {
-			if err := recordMerge(checkpoints, input.stepID, lane.ID, lane.Merge.Module, mergeDeps, serializedMerge, mergeWarnings); err != nil {
+			if err := recordMerge(checkpoints, input.stepID, lane.ID, lane.Merge.Module, mergeDeps, serializedMerge); err != nil {
 				return stageResult, err
 			}
 		}
 	}
-	if err := writeDebugTimed(input.Debug, path.Join("merge", fileio.EncodePathComponent(lane.ID), "output.json"), debugTimedEnvelope{Stage: string(StageMerge), StepID: input.stepID, LaneID: lane.ID, ModuleKey: lane.Merge.Module, StartedAt: time.Now().UTC(), Payload: map[string]any{"reused": mergeDecision.Reused, "accepted": true, "output": debugCheckpointArtifact(serializedMerge), "warnings": debugWarningEnvelopes(mergeWarnings)}}); err != nil {
+	if err := writeDebugTimed(input.Debug, path.Join("merge", fileio.EncodePathComponent(lane.ID), "output.json"), debugTimedEnvelope{Stage: string(StageMerge), StepID: input.stepID, LaneID: lane.ID, ModuleKey: lane.Merge.Module, StartedAt: time.Now().UTC(), Payload: map[string]any{"reused": mergeDecision.Reused, "accepted": true, "output": debugCheckpointArtifact(serializedMerge)}}); err != nil {
 		return stageResult, err
 	}
 	stageResult.artifact = merged
@@ -396,7 +389,6 @@ func (r *Runner) runMergeStage(ctx context.Context, input RunInput, checkpoints
 
 type normalizeStageResult struct {
 	serialized    CheckpointArtifact
-	warnings      []contracts.Warning
 	accepted      bool
 	reuseEligible bool
 }
@@ -422,11 +414,8 @@ func (r *Runner) runNormalizeStage(ctx context.Context, input RunInput, checkpoi
 		return stageResult, err
 	}
 	var serializedNormalize CheckpointArtifact
-	var normalizeWarnings []contracts.Warning
 	if normalizeDecision.Reused {
 		serializedNormalize = normalizeResolution.artifacts[0]
-		normalizeWarnings = cloneWarnings(normalizeCP.Warnings)
-		output.Warnings = append(output.Warnings, normalizeWarnings...)
 		diagnostics, diagnosticErr := promoteCheckpointDiagnostics(serializedNormalize.Diagnostics, contracts.DiagnosticOrigin{Stage: contracts.DiagnosticOriginStageNormalize, StepID: input.stepID, LaneID: lane.ID, ModuleKey: lane.Normalize.Module}, nil)
 		if diagnosticErr != nil {
 			return stageResult, fmt.Errorf("promote reused normalize diagnostics: %w", diagnosticErr)
@@ -451,28 +440,27 @@ func (r *Runner) runNormalizeStage(ctx context.Context, input RunInput, checkpoi
 			if callErr != nil {
 				return producerAttemptOutput{}, terminal.record(nil, fmt.Errorf("normalize lane %q with normalizer %q: %w", lane.ID, lane.Normalize.Module, callErr))
 			}
-			warnings := cloneWarnings(result.Warnings)
 			serializedCandidate, encodeErr := serializeCandidateArtifact(typed.codec, lane.ID, lane.Normalize.Module, doc.ID, result.Value)
 			if encodeErr != nil {
-				return producerAttemptOutput{}, terminal.record(map[string]any{"warnings": debugWarningEnvelopes(warnings)}, fmt.Errorf("serialize normalize candidate for lane %q: %w", lane.ID, encodeErr))
+				return producerAttemptOutput{}, terminal.record(nil, fmt.Errorf("serialize normalize candidate for lane %q: %w", lane.ID, encodeErr))
 			}
 			attemptValue := normalizeAttemptValue{value: result.Value, candidate: serializedCandidate, terminal: &terminal}
 			var directive *producerRetryDirective
 			if result.Retry != nil {
 				if err := validateNormalizeRetry(result.Retry); err != nil {
-					return producerAttemptOutput{}, terminal.record(map[string]any{"output": debugCheckpointArtifact(serializedCandidate), "warnings": debugWarningEnvelopes(warnings)}, fmt.Errorf("normalize lane %q returned invalid retry directive: %w", lane.ID, err))
+					return producerAttemptOutput{}, terminal.record(map[string]any{"output": debugCheckpointArtifact(serializedCandidate)}, fmt.Errorf("normalize lane %q returned invalid retry directive: %w", lane.ID, err))
 				}
 				anotherAttempt := request.Number <= lane.Normalize.Retries
 				attemptValue.retry = map[string]any{"reason_code": result.Retry.ReasonCode, "message": result.Retry.Message, "another_attempt": anotherAttempt, "fallback_accepted": !anotherAttempt}
-				directive = &producerRetryDirective{FallbackWarnings: cloneWarnings(result.Retry.FallbackWarnings), FallbackDiagnostics: contracts.CloneProducerDiagnostics(result.Retry.FallbackDiagnostics)}
+				directive = &producerRetryDirective{FallbackDiagnostics: contracts.CloneProducerDiagnostics(result.Retry.FallbackDiagnostics)}
 				if anotherAttempt {
-					payload := map[string]any{"output": debugCheckpointArtifact(serializedCandidate), "warnings": debugWarningEnvelopes(warnings), "retry": attemptValue.retry}
+					payload := map[string]any{"output": debugCheckpointArtifact(serializedCandidate), "retry": attemptValue.retry}
 					if debugErr := terminal.record(payload, nil); debugErr != nil {
 						return producerAttemptOutput{}, debugErr
 					}
 				}
 			}
-			return producerAttemptOutput{Value: attemptValue, Candidate: result.ModelCandidate, Warnings: warnings, Diagnostics: contracts.CloneProducerDiagnostics(result.Diagnostics), Retry: directive}, nil
+			return producerAttemptOutput{Value: attemptValue, Candidate: result.ModelCandidate, Diagnostics: contracts.CloneProducerDiagnostics(result.Diagnostics), Retry: directive}, nil
 		}, func(validationCtx context.Context, output producerAttemptOutput) (validationReport, error) {
 			candidate, ok := output.Value.(normalizeAttemptValue)
 			if !ok {
@@ -480,7 +468,7 @@ func (r *Runner) runNormalizeStage(ctx context.Context, input RunInput, checkpoi
 			}
 			target := typedValidationTarget{stage: StageNormalize, stepID: input.stepID, laneID: lane.ID, moduleKey: lane.Normalize.Module, source: doc, sourceID: doc.ID, sourceInput: sourceInput.Clone(), sessionID: sessionID, references: normalizeReferences, metadata: input.Metadata, value: candidate.value, candidate: &candidate.candidate}
 			report, validationErr := r.validateTypedReport(validationCtx, typed.codec, target, prepared.normalizeValidators, candidate.terminal.envelope.Attempt, input.Debug)
-			payload := map[string]any{"output": debugCheckpointArtifact(candidate.candidate), "warnings": debugWarningEnvelopes(append(cloneWarnings(output.Warnings), report.Warnings()...)), "rejection": debugRejectedOutputPtr(typedRejection(report, target, candidate.terminal.envelope.Attempt))}
+			payload := map[string]any{"output": debugCheckpointArtifact(candidate.candidate), "rejection": debugRejectedOutputPtr(typedRejection(report, target, candidate.terminal.envelope.Attempt))}
 			if candidate.retry != nil {
 				payload["retry"] = candidate.retry
 			}
@@ -514,7 +502,6 @@ func (r *Runner) runNormalizeStage(ctx context.Context, input RunInput, checkpoi
 			rejected.Stage, rejected.StepID, rejected.LaneID, rejected.ModuleKey = string(StageNormalize), input.stepID, lane.ID, lane.Normalize.Module
 			rejected.Validation = &terminalSummary
 			output.ValidationSummaries = append(output.ValidationSummaries, artifacts.CloneValidationSummary(terminalSummary))
-			output.Warnings = append(output.Warnings, terminalResult.Warnings...)
 			appendDiagnosticGroups(output, terminalDiagnostics)
 			output.Rejected = append(output.Rejected, *rejected)
 			if stageResult.reuseEligible {
@@ -529,7 +516,7 @@ func (r *Runner) runNormalizeStage(ctx context.Context, input RunInput, checkpoi
 			return stageResult, fmt.Errorf("normalize attempt terminal has incompatible value")
 		}
 		stored, encodeErr := checkpointArtifact(typed.codec, lane.ID, lane.Normalize.Module, doc.ID, candidate.value)
-		payload := map[string]any{"output": debugCheckpointArtifact(candidate.candidate), "warnings": debugWarningEnvelopes(terminalResult.Warnings), "rejection": debugRejectedOutputPtr(nil)}
+		payload := map[string]any{"output": debugCheckpointArtifact(candidate.candidate), "rejection": debugRejectedOutputPtr(nil)}
 		if candidate.retry != nil {
 			payload["retry"] = candidate.retry
 		}
@@ -548,24 +535,21 @@ func (r *Runner) runNormalizeStage(ctx context.Context, input RunInput, checkpoi
 			return stageResult, debugErr
 		}
 		serializedNormalize = stored
-		normalizeWarnings = cloneWarnings(terminalResult.Warnings)
 		output.ValidationSummaries = append(output.ValidationSummaries, terminalSummary)
-		output.Warnings = append(output.Warnings, normalizeWarnings...)
 		appendDiagnosticGroups(output, terminalDiagnostics)
 		if terminalResult.ValidationIncomplete {
 			stageResult.reuseEligible = false
 		}
 		if stageResult.reuseEligible {
-			if err := recordNormalize(checkpoints, input.stepID, lane.ID, lane.Normalize.Module, normalizeDeps, serializedNormalize, normalizeWarnings); err != nil {
+			if err := recordNormalize(checkpoints, input.stepID, lane.ID, lane.Normalize.Module, normalizeDeps, serializedNormalize); err != nil {
 				return stageResult, err
 			}
 		}
 	}
-	if err := writeDebugTimed(input.Debug, path.Join("normalize", fileio.EncodePathComponent(lane.ID), "output.json"), debugTimedEnvelope{Stage: string(StageNormalize), StepID: input.stepID, LaneID: lane.ID, ModuleKey: lane.Normalize.Module, StartedAt: time.Now().UTC(), Payload: map[string]any{"reused": normalizeDecision.Reused, "accepted": true, "output": debugCheckpointArtifact(serializedNormalize), "warnings": debugWarningEnvelopes(normalizeWarnings)}}); err != nil {
+	if err := writeDebugTimed(input.Debug, path.Join("normalize", fileio.EncodePathComponent(lane.ID), "output.json"), debugTimedEnvelope{Stage: string(StageNormalize), StepID: input.stepID, LaneID: lane.ID, ModuleKey: lane.Normalize.Module, StartedAt: time.Now().UTC(), Payload: map[string]any{"reused": normalizeDecision.Reused, "accepted": true, "output": debugCheckpointArtifact(serializedNormalize)}}); err != nil {
 		return stageResult, err
 	}
 	stageResult.serialized = serializedNormalize
-	stageResult.warnings = normalizeWarnings
 	stageResult.accepted = true
 	return stageResult, nil
 }

internal/framework/pipeline/synchronized_collaborators.go

@@ -134,8 +134,8 @@ func (r *lockedCheckpointRecorder) SourceFailed(key string, err error) error {
 func (r *lockedCheckpointRecorder) ExtractRunning(lane, key string, deps []CheckpointFingerprint) error {
 	return r.call(func() error { return r.inner.ExtractRunning(lane, key, deps) })
 }
-func (r *lockedCheckpointRecorder) ExtractSucceeded(lane, key string, deps []CheckpointFingerprint, outputs []CheckpointArtifact, rejected []contracts.RejectedOutput, warnings []contracts.Warning) error {
+func (r *lockedCheckpointRecorder) ExtractSucceeded(lane, key string, deps []CheckpointFingerprint, outputs []CheckpointArtifact, rejected []contracts.RejectedOutput) error {
-	return r.call(func() error { return r.inner.ExtractSucceeded(lane, key, deps, outputs, rejected, warnings) })
+	return r.call(func() error { return r.inner.ExtractSucceeded(lane, key, deps, outputs, rejected) })
 }
 func (r *lockedCheckpointRecorder) ExtractFailed(lane, key string, deps []CheckpointFingerprint, err error) error {
 	return r.call(func() error { return r.inner.ExtractFailed(lane, key, deps, err) })
@@ -143,8 +143,8 @@ func (r *lockedCheckpointRecorder) ExtractFailed(lane, key string, deps []Checkp
 func (r *lockedCheckpointRecorder) MergeRunning(lane, key string, deps []CheckpointFingerprint) error {
 	return r.call(func() error { return r.inner.MergeRunning(lane, key, deps) })
 }
-func (r *lockedCheckpointRecorder) MergeSucceeded(lane, key string, deps []CheckpointFingerprint, output CheckpointArtifact, warnings []contracts.Warning) error {
+func (r *lockedCheckpointRecorder) MergeSucceeded(lane, key string, deps []CheckpointFingerprint, output CheckpointArtifact) error {
-	return r.call(func() error { return r.inner.MergeSucceeded(lane, key, deps, output, warnings) })
+	return r.call(func() error { return r.inner.MergeSucceeded(lane, key, deps, output) })
 }
 func (r *lockedCheckpointRecorder) MergeRejected(lane, key string, deps []CheckpointFingerprint, rejected contracts.RejectedOutput) error {
 	return r.call(func() error { return r.inner.MergeRejected(lane, key, deps, rejected) })
@@ -155,8 +155,8 @@ func (r *lockedCheckpointRecorder) MergeFailed(lane, key string, deps []Checkpoi
 func (r *lockedCheckpointRecorder) NormalizeRunning(lane, key string, deps []CheckpointFingerprint) error {
 	return r.call(func() error { return r.inner.NormalizeRunning(lane, key, deps) })
 }
-func (r *lockedCheckpointRecorder) NormalizeSucceeded(lane, key string, deps []CheckpointFingerprint, output CheckpointArtifact, warnings []contracts.Warning) error {
+func (r *lockedCheckpointRecorder) NormalizeSucceeded(lane, key string, deps []CheckpointFingerprint, output CheckpointArtifact) error {
-	return r.call(func() error { return r.inner.NormalizeSucceeded(lane, key, deps, output, warnings) })
+	return r.call(func() error { return r.inner.NormalizeSucceeded(lane, key, deps, output) })
 }
 func (r *lockedCheckpointRecorder) NormalizeRejected(lane, key string, deps []CheckpointFingerprint, rejected contracts.RejectedOutput) error {
 	return r.call(func() error { return r.inner.NormalizeRejected(lane, key, deps, rejected) })
@@ -173,12 +173,12 @@ func (r *lockedCheckpointRecorder) ExtractRunningForStep(step, lane, key string,
 		return r.inner.ExtractRunning(lane, key, deps)
 	})
 }
-func (r *lockedCheckpointRecorder) ExtractSucceededForStep(step, lane, key string, deps []CheckpointFingerprint, outputs []CheckpointArtifact, rejected []contracts.RejectedOutput, warnings []contracts.Warning) error {
+func (r *lockedCheckpointRecorder) ExtractSucceededForStep(step, lane, key string, deps []CheckpointFingerprint, outputs []CheckpointArtifact, rejected []contracts.RejectedOutput) error {
 	return r.call(func() error {
 		if v, ok := r.inner.(StepCheckpointRecorder); ok {
-			return v.ExtractSucceededForStep(step, lane, key, deps, outputs, rejected, warnings)
+			return v.ExtractSucceededForStep(step, lane, key, deps, outputs, rejected)
 		}
-		return r.inner.ExtractSucceeded(lane, key, deps, outputs, rejected, warnings)
+		return r.inner.ExtractSucceeded(lane, key, deps, outputs, rejected)
 	})
 }
 func (r *lockedCheckpointRecorder) ExtractFailedForStep(step, lane, key string, deps []CheckpointFingerprint, err error) error {
@@ -197,12 +197,12 @@ func (r *lockedCheckpointRecorder) MergeRunningForStep(step, lane, key string, d
 		return r.inner.MergeRunning(lane, key, deps)
 	})
 }
-func (r *lockedCheckpointRecorder) MergeSucceededForStep(step, lane, key string, deps []CheckpointFingerprint, output CheckpointArtifact, warnings []contracts.Warning) error {
+func (r *lockedCheckpointRecorder) MergeSucceededForStep(step, lane, key string, deps []CheckpointFingerprint, output CheckpointArtifact) error {
 	return r.call(func() error {
 		if v, ok := r.inner.(StepCheckpointRecorder); ok {
-			return v.MergeSucceededForStep(step, lane, key, deps, output, warnings)
+			return v.MergeSucceededForStep(step, lane, key, deps, output)
 		}
-		return r.inner.MergeSucceeded(lane, key, deps, output, warnings)
+		return r.inner.MergeSucceeded(lane, key, deps, output)
 	})
 }
 func (r *lockedCheckpointRecorder) MergeRejectedForStep(step, lane, key string, deps []CheckpointFingerprint, rejected contracts.RejectedOutput) error {
@@ -229,12 +229,12 @@ func (r *lockedCheckpointRecorder) NormalizeRunningForStep(step, lane, key strin
 		return r.inner.NormalizeRunning(lane, key, deps)
 	})
 }
-func (r *lockedCheckpointRecorder) NormalizeSucceededForStep(step, lane, key string, deps []CheckpointFingerprint, output CheckpointArtifact, warnings []contracts.Warning) error {
+func (r *lockedCheckpointRecorder) NormalizeSucceededForStep(step, lane, key string, deps []CheckpointFingerprint, output CheckpointArtifact) error {
 	return r.call(func() error {
 		if v, ok := r.inner.(StepCheckpointRecorder); ok {
-			return v.NormalizeSucceededForStep(step, lane, key, deps, output, warnings)
+			return v.NormalizeSucceededForStep(step, lane, key, deps, output)
 		}
-		return r.inner.NormalizeSucceeded(lane, key, deps, output, warnings)
+		return r.inner.NormalizeSucceeded(lane, key, deps, output)
 	})
 }
 func (r *lockedCheckpointRecorder) NormalizeRejectedForStep(step, lane, key string, deps []CheckpointFingerprint, rejected contracts.RejectedOutput) error {

internal/framework/pipeline/typed_execution.go

@@ -23,7 +23,6 @@ type erasedMergeArtifact struct {
 
 type erasedTypedResult struct {
 	Value          any
-	Warnings       []contracts.Warning
 	Diagnostics    []contracts.ProducerDiagnostic
 	Retry          *contracts.NormalizeRetry
 	ModelCandidate *contracts.ModelCandidate

internal/framework/pipeline/validation_executor.go

@@ -29,14 +29,12 @@ type validationRecord struct {
 	reasonCode         string
 	message            string
 	diagnosticPath     string
-	warnings           []contracts.Warning
 	diagnostics        []contracts.ProducerDiagnostic
 	correctionGuidance string
 	failure            error
 }
 
 func (record validationRecord) clone() validationRecord {
-	record.warnings = cloneWarnings(record.warnings)
 	record.diagnostics = contracts.CloneProducerDiagnostics(record.diagnostics)
 	return record
 }
@@ -54,16 +52,6 @@ func (report validationReport) Records() []validationRecord {
 	return records
 }
 
-func (report validationReport) Warnings() []contracts.Warning {
-	var warnings []contracts.Warning
-	for _, record := range report.records {
-		if record.outcome == validationApproved || record.outcome == validationRejected {
-			warnings = append(warnings, cloneWarnings(record.warnings)...)
-		}
-	}
-	return warnings
-}
-
 func (report validationReport) Diagnostics() []validationDiagnosticRecord {
 	var diagnostics []validationDiagnosticRecord
 	for _, record := range report.records {
@@ -207,14 +195,14 @@ func executeValidationChain(ctx context.Context, chain preparedValidatorChain, i
 				continue
 			}
 			if invocation.result.Approved {
-				report.records = append(report.records, validationRecord{validatorName: binding.Module, outcome: validationApproved, attemptCount: attempt, warnings: cloneWarnings(invocation.result.Warnings), diagnostics: cloneProducerDiagnostics(invocation.result.Diagnostics), diagnosticPath: invocation.result.DiagnosticArtifactPath})
+				report.records = append(report.records, validationRecord{validatorName: binding.Module, outcome: validationApproved, attemptCount: attempt, diagnostics: cloneProducerDiagnostics(invocation.result.Diagnostics), diagnosticPath: invocation.result.DiagnosticArtifactPath})
 				break
 			}
 			message := invocation.result.Message
 			if message == "" {
 				message = "output rejected"
 			}
-			report.records = append(report.records, validationRecord{validatorName: binding.Module, outcome: validationRejected, attemptCount: attempt, reasonCode: invocation.result.ReasonCode, message: message, diagnosticPath: invocation.result.DiagnosticArtifactPath, warnings: cloneWarnings(invocation.result.Warnings), diagnostics: cloneProducerDiagnostics(invocation.result.Diagnostics), correctionGuidance: invocation.result.CorrectionGuidance})
+			report.records = append(report.records, validationRecord{validatorName: binding.Module, outcome: validationRejected, attemptCount: attempt, reasonCode: invocation.result.ReasonCode, message: message, diagnosticPath: invocation.result.DiagnosticArtifactPath, diagnostics: cloneProducerDiagnostics(invocation.result.Diagnostics), correctionGuidance: invocation.result.CorrectionGuidance})
 			break
 		}
 	}

internal/framework/pipeline/validation_executor_test.go

@@ -18,18 +18,18 @@ func TestExecuteValidationChainSettlesEveryValidatorInOrder(t *testing.T) {
 		want            []validationOutcome
 		wantCalls       []string
 		wantGuidance    []string
-		wantWarnings []string
+		wantDiagnostics []string
 	}{
 		{
 			name:  "all approved",
 			chain: validationChain(validationSpec("shape", contracts.ExecutionClassDeterministic, 0), validationSpec("refs", contracts.ExecutionClassDeterministic, 0)),
 			invoke: validationSequence(map[string][]validationStep{
-				"shape": {{result: contracts.ValidationResult{Approved: true, Warnings: []contracts.Warning{{ReasonCode: "shape"}}}}},
+				"shape": {{result: contracts.ValidationResult{Approved: true, Diagnostics: []contracts.ProducerDiagnostic{validationDiagnostic("shape")}}}},
-				"refs":  {{result: contracts.ValidationResult{Approved: true, Warnings: []contracts.Warning{{ReasonCode: "refs"}}}}},
+				"refs":  {{result: contracts.ValidationResult{Approved: true, Diagnostics: []contracts.ProducerDiagnostic{validationDiagnostic("refs")}}}},
 			}),
 			want:            []validationOutcome{validationApproved, validationApproved},
 			wantCalls:       []string{"shape:1", "refs:1"},
-			wantWarnings: []string{"shape", "refs"},
+			wantDiagnostics: []string{"shape", "refs"},
 		},
 		{
 			name:  "multiple rejections deduplicate guidance",
@@ -117,13 +117,13 @@ func TestExecuteValidationChainSettlesEveryValidatorInOrder(t *testing.T) {
 					}
 				}
 			}
-			warnings := report.Warnings()
+			diagnostics := report.Diagnostics()
-			var warningCodes []string
+			var diagnosticCodes []string
-			for _, warning := range warnings {
+			for _, record := range diagnostics {
-				warningCodes = append(warningCodes, warning.ReasonCode)
+				diagnosticCodes = append(diagnosticCodes, record.diagnostic.ReasonCode)
 			}
-			if !reflect.DeepEqual(warningCodes, test.wantWarnings) {
+			if !reflect.DeepEqual(diagnosticCodes, test.wantDiagnostics) {
-				t.Fatalf("Warnings() = %#v, want codes %#v", warnings, test.wantWarnings)
+				t.Fatalf("Diagnostics() = %#v, want codes %#v", diagnostics, test.wantDiagnostics)
 			}
 		})
 	}
@@ -158,14 +158,24 @@ func TestValidationReportRejectsOversizedGuidanceAndOwnsRecords(t *testing.T) {
 		unique[0] = byte('a' + index)
 		report.records[index] = validationRecord{validatorName: "validator", outcome: validationRejected, correctionGuidance: string(unique)}
 	}
-	report.records[0].warnings = []contracts.Warning{{ReasonCode: "warning"}}
+	report.records[0].diagnostics = []contracts.ProducerDiagnostic{validationDiagnostic("diagnostic")}
 	if _, err := report.CorrectionRequest(); err == nil {
 		t.Fatal("CorrectionRequest() error = nil, want aggregate overflow error")
 	}
 	records := report.Records()
-	records[0].warnings[0].ReasonCode = "changed"
+	records[0].diagnostics[0].ReasonCode = "changed"
-	if report.Records()[0].warnings[0].ReasonCode != "warning" {
+	if report.Records()[0].diagnostics[0].ReasonCode != "diagnostic" {
-		t.Fatal("Records() exposed mutable warning storage")
+		t.Fatal("Records() exposed mutable diagnostic storage")
+	}
+}
+
+func validationDiagnostic(reasonCode string) contracts.ProducerDiagnostic {
+	return contracts.ProducerDiagnostic{
+		Disposition:     contracts.DiagnosticDispositionObservation,
+		Category:        contracts.DiagnosticCategoryNormalization,
+		ReasonCode:      reasonCode,
+		OccurrenceCount: 1,
+		Samples:         []contracts.DiagnosticSample{{Scope: "validator", Message: reasonCode}},
 	}
 }
 

internal/modules/dnd/chunk/scenes/chunker_test.go

@@ -179,9 +179,6 @@ func TestPlanReturnsAnnotationFreeSceneRangesFromStructuredOutput(t *testing.T)
 	if len(result.Plan.Annotations) != 0 {
 		t.Fatalf("plan annotations = %#v, want absent", result.Plan.Annotations)
 	}
-	if len(result.Warnings) != 0 {
-		t.Fatalf("warnings = %#v, want absent", result.Warnings)
-	}
 	wantCandidate, err := json.Marshal(client.response)
 	if err != nil {
 		t.Fatalf("marshal expected candidate: %v", err)

internal/modules/dnd/extract/combatturns/extractor_test.go

@@ -310,10 +310,10 @@ func TestExtractAppliesSceneEligibilityBeforePromptConstruction(t *testing.T) {
 				t.Fatal("CombatTurns = nil, want accepted non-nil empty list")
 			}
 			if test.wantWarning != "" {
-				if len(result.Warnings) != 0 || len(result.Diagnostics) != 1 || result.Diagnostics[0].Samples[0].Scope != SceneDescriptionReferenceSlot || result.Diagnostics[0].ReasonCode != test.wantWarning || result.Diagnostics[0].Disposition != contracts.DiagnosticDispositionWarning || result.Diagnostics[0].Category != contracts.DiagnosticCategoryDegradation {
+				if len(result.Diagnostics) != 1 || result.Diagnostics[0].Samples[0].Scope != SceneDescriptionReferenceSlot || result.Diagnostics[0].ReasonCode != test.wantWarning || result.Diagnostics[0].Disposition != contracts.DiagnosticDispositionWarning || result.Diagnostics[0].Category != contracts.DiagnosticCategoryDegradation {
 					t.Fatalf("diagnostics = %#v", result.Diagnostics)
 				}
-			} else if len(result.Warnings) != 0 || len(result.Diagnostics) != 0 {
+			} else if len(result.Diagnostics) != 0 {
 				t.Fatalf("diagnostics = %#v, want none", result.Diagnostics)
 			}
 		})

internal/modules/dnd/extract/enemyevents/extractor_test.go

@@ -98,10 +98,10 @@ func TestExtractSkipsModelForIneligibleScenes(t *testing.T) {
 				t.Fatalf("result = %#v, calls = %d", result, len(client.requests))
 			}
 			if test.wantWarning {
-				if len(result.Warnings) != 0 || len(result.Diagnostics) != 1 || result.Diagnostics[0].ReasonCode != "scene_classification_unavailable" || result.Diagnostics[0].Disposition != contracts.DiagnosticDispositionWarning || result.Diagnostics[0].Category != contracts.DiagnosticCategoryDegradation || result.Diagnostics[0].Samples[0].Scope != SceneDescriptionReferenceSlot {
+				if len(result.Diagnostics) != 1 || result.Diagnostics[0].ReasonCode != "scene_classification_unavailable" || result.Diagnostics[0].Disposition != contracts.DiagnosticDispositionWarning || result.Diagnostics[0].Category != contracts.DiagnosticCategoryDegradation || result.Diagnostics[0].Samples[0].Scope != SceneDescriptionReferenceSlot {
 					t.Fatalf("diagnostics = %#v", result.Diagnostics)
 				}
-			} else if len(result.Warnings) != 0 || len(result.Diagnostics) != 0 {
+			} else if len(result.Diagnostics) != 0 {
 				t.Fatalf("diagnostics = %#v", result.Diagnostics)
 			}
 		})

internal/modules/dnd/extract/spells/extractor_test.go

@@ -40,10 +40,6 @@ func TestExtractReturnsCanonicalSpellListFromPrivateResponse(t *testing.T) {
 	if !reflect.DeepEqual(result.Value, want) {
 		t.Fatalf("Value = %#v, want %#v", result.Value, want)
 	}
-	if len(result.Warnings) != 0 {
-		t.Fatalf("Warnings = %#v, want none", result.Warnings)
-	}
-
 	if len(client.requests) != 1 {
 		t.Fatalf("LLM calls = %d, want 1", len(client.requests))
 	}

internal/modules/dnd/normalize/combatturns/normalizer.go

@@ -132,13 +132,13 @@ type actorCanonicalization struct {
 	to   string
 }
 
-func normalizeList(input dnd.CombatTurnList, documentIndex source.DocumentIndex, order shared.SourceRefOrder, registry *npcregistry.Registry) (dnd.CombatTurnList, []contracts.Warning) {
+func normalizeList(input dnd.CombatTurnList, documentIndex source.DocumentIndex, order shared.SourceRefOrder, registry *npcregistry.Registry) (dnd.CombatTurnList, []diagnostics.Finding) {
 	if input.CombatTurns == nil {
 		return dnd.CombatTurnList{}, nil
 	}
 
 	records := make([]normalizedRecord, len(input.CombatTurns))
-	warnings := make([]contracts.Warning, 0)
+	warnings := make([]diagnostics.Finding, 0)
 	for index, inputTurn := range input.CombatTurns {
 		turn, actorChange, refsChanged := normalizeTurn(inputTurn, order, registry)
 		earliest, hasEvidence := order.EarliestValid(turn.SourceRefs)
@@ -149,7 +149,7 @@ func normalizeList(input dnd.CombatTurnList, documentIndex source.DocumentIndex,
 			hasEvidence: hasEvidence,
 		}
 		if actorChange != nil {
-			warnings = append(warnings, contracts.Warning{
+			warnings = append(warnings, diagnostics.Finding{
 				Scope:      turnScope(index),
 				ReasonCode: ReasonCodeActorCanonicalized,
 				Message: fmt.Sprintf("input index %d: actor canonicalized from %s to %s",
@@ -157,7 +157,7 @@ func normalizeList(input dnd.CombatTurnList, documentIndex source.DocumentIndex,
 			})
 		}
 		if refsChanged {
-			warnings = append(warnings, contracts.Warning{
+			warnings = append(warnings, diagnostics.Finding{
 				Scope:      turnScope(index),
 				ReasonCode: ReasonCodeSourceRefsNormalized,
 				Message: fmt.Sprintf("input index %d: source references normalized (original count %d, final count %d)",
@@ -179,7 +179,7 @@ func normalizeList(input dnd.CombatTurnList, documentIndex source.DocumentIndex,
 		if position == record.inputIndex {
 			continue
 		}
-		warnings = append(warnings, contracts.Warning{
+		warnings = append(warnings, diagnostics.Finding{
 			Scope:      turnScope(record.inputIndex),
 			ReasonCode: ReasonCodeTurnsReordered,
 			Message: fmt.Sprintf("input index %d moved to normalized position %d by source chronology",
@@ -236,7 +236,7 @@ type duplicateGroup struct {
 	removed       []int
 }
 
-func collapseDuplicates(records []normalizedRecord, documentIndex source.DocumentIndex) ([]dnd.CombatTurn, []contracts.Warning) {
+func collapseDuplicates(records []normalizedRecord, documentIndex source.DocumentIndex) ([]dnd.CombatTurn, []diagnostics.Finding) {
 	if len(records) == 0 {
 		return make([]dnd.CombatTurn, 0), nil
 	}
@@ -267,7 +267,7 @@ func collapseDuplicates(records []normalizedRecord, documentIndex source.Documen
 		}
 	}
 
-	warnings := make([]contracts.Warning, 0)
+	warnings := make([]diagnostics.Finding, 0)
 	for _, group := range groups {
 		if len(group.removed) == 0 {
 			continue
@@ -309,12 +309,12 @@ func writeKeyInt(builder *strings.Builder, value int) {
 	builder.WriteByte(';')
 }
 
-func duplicateWarning(retainedIndex int, removed []int) contracts.Warning {
+func duplicateWarning(retainedIndex int, removed []int) diagnostics.Finding {
 	issues := make([]string, len(removed))
 	for index, removedIndex := range removed {
 		issues[index] = fmt.Sprintf("removed input index %d", removedIndex)
 	}
-	return contracts.Warning{
+	return diagnostics.Finding{
 		Scope:      turnScope(retainedIndex),
 		ReasonCode: ReasonCodeDuplicateCollapsed,
 		Message: diagnostics.Aggregate(

internal/modules/dnd/normalize/combatturns/normalizer_test.go

@@ -15,7 +15,6 @@ import (
 	"gitea.maximumdirect.net/eric/notarius/internal/modules/dnd"
 	npccodec "gitea.maximumdirect.net/eric/notarius/internal/modules/dnd/codec/npcregistry"
 	"gitea.maximumdirect.net/eric/notarius/internal/modules/dnd/npcs/identity"
-	"gitea.maximumdirect.net/eric/notarius/internal/modules/dnd/shared/diagnostics"
 )
 
 func TestNormalizeCanonicalizesFieldsAndRegistryIdentities(t *testing.T) {
@@ -61,7 +60,7 @@ func TestNormalizeCanonicalizesFieldsAndRegistryIdentities(t *testing.T) {
 }
 
 func TestNormalizeLimitsWarningsWithoutChangingCombatTurnValues(t *testing.T) {
-	units := make([]source.SourceUnit, diagnostics.MaxWarnings+1)
+	units := make([]source.SourceUnit, contracts.MaxDiagnosticSamples+1)
 	turns := make([]dnd.CombatTurn, len(units))
 	for index := range units {
 		unitID := index + 1
@@ -82,7 +81,7 @@ func TestNormalizeLimitsWarningsWithoutChangingCombatTurnValues(t *testing.T) {
 	if len(result.Value.CombatTurns) != len(turns) || result.Value.CombatTurns[0].Actor != "Aria" {
 		t.Fatalf("normalized turns = %#v, want canonicalized values", result.Value.CombatTurns)
 	}
-	if len(result.Warnings) != 0 || len(result.Diagnostics) == 0 || result.Diagnostics[0].Disposition != contracts.DiagnosticDispositionObservation || result.Diagnostics[0].OccurrenceCount != len(turns) || len(result.Diagnostics[0].Samples) != contracts.MaxDiagnosticSamples {
+	if len(result.Diagnostics) == 0 || result.Diagnostics[0].Disposition != contracts.DiagnosticDispositionObservation || result.Diagnostics[0].OccurrenceCount != len(turns) || len(result.Diagnostics[0].Samples) != contracts.MaxDiagnosticSamples {
 		t.Fatalf("diagnostics = %#v", result.Diagnostics)
 	}
 }

internal/modules/dnd/normalize/enemyevents/normalizer.go

@@ -123,17 +123,17 @@ type nameCanonicalization struct {
 	to   string
 }
 
-func normalizeList(input dnd.EnemyEventList, order shared.SourceRefOrder, registry *npcregistry.Registry) (dnd.EnemyEventList, []contracts.Warning) {
+func normalizeList(input dnd.EnemyEventList, order shared.SourceRefOrder, registry *npcregistry.Registry) (dnd.EnemyEventList, []diagnostics.Finding) {
 	if input.Events == nil {
 		return dnd.EnemyEventList{}, nil
 	}
 	records := make([]normalizedRecord, len(input.Events))
-	warnings := make([]contracts.Warning, 0)
+	warnings := make([]diagnostics.Finding, 0)
 	for index, inputEvent := range input.Events {
 		event, nameChange, refsChanged := normalizeEvent(inputEvent, order, registry)
 		records[index] = normalizedRecord{event: event, identity: enemyeventmodel.CanonicalIdentity(event), inputIndex: index}
 		if nameChange != nil {
-			warnings = append(warnings, contracts.Warning{
+			warnings = append(warnings, diagnostics.Finding{
 				Scope:      eventScope(index),
 				ReasonCode: ReasonCodeNameCanonicalized,
 				Message: fmt.Sprintf("input index %d: subject canonicalized from %s to %s",
@@ -141,7 +141,7 @@ func normalizeList(input dnd.EnemyEventList, order shared.SourceRefOrder, regist
 			})
 		}
 		if refsChanged {
-			warnings = append(warnings, contracts.Warning{
+			warnings = append(warnings, diagnostics.Finding{
 				Scope:      eventScope(index),
 				ReasonCode: ReasonCodeSourceRefsNormalized,
 				Message: fmt.Sprintf("input index %d: source references normalized (original count %d, final count %d)",
@@ -157,7 +157,7 @@ func normalizeList(input dnd.EnemyEventList, order shared.SourceRefOrder, regist
 		if position == record.inputIndex {
 			continue
 		}
-		warnings = append(warnings, contracts.Warning{
+		warnings = append(warnings, diagnostics.Finding{
 			Scope:      eventScope(record.inputIndex),
 			ReasonCode: ReasonCodeEventsReordered,
 			Message:    fmt.Sprintf("input index %d moved to normalized position %d", record.inputIndex, position),
@@ -208,7 +208,7 @@ type duplicateGroup struct {
 	removed       []int
 }
 
-func collapseDuplicates(records []normalizedRecord) ([]dnd.EnemyEvent, []contracts.Warning) {
+func collapseDuplicates(records []normalizedRecord) ([]dnd.EnemyEvent, []diagnostics.Finding) {
 	if len(records) == 0 {
 		return make([]dnd.EnemyEvent, 0), nil
 	}
@@ -235,7 +235,7 @@ func collapseDuplicates(records []normalizedRecord) ([]dnd.EnemyEvent, []contrac
 	for index, record := range kept {
 		output[index] = cloneEvent(record.event)
 	}
-	warnings := make([]contracts.Warning, 0)
+	warnings := make([]diagnostics.Finding, 0)
 	for _, group := range groups {
 		if len(group.removed) == 0 {
 			continue
@@ -244,7 +244,7 @@ func collapseDuplicates(records []normalizedRecord) ([]dnd.EnemyEvent, []contrac
 		for index, removed := range group.removed {
 			issues[index] = fmt.Sprintf("removed input index %d", removed)
 		}
-		warnings = append(warnings, contracts.Warning{
+		warnings = append(warnings, diagnostics.Finding{
 			Scope:      eventScope(group.retainedIndex),
 			ReasonCode: ReasonCodeDuplicateCollapsed,
 			Message: diagnostics.Aggregate(

internal/modules/dnd/normalize/enemyevents/normalizer_test.go

@@ -13,7 +13,6 @@ import (
 	"gitea.maximumdirect.net/eric/notarius/internal/modules/dnd"
 	npccodec "gitea.maximumdirect.net/eric/notarius/internal/modules/dnd/codec/npcregistry"
 	"gitea.maximumdirect.net/eric/notarius/internal/modules/dnd/npcs/identity"
-	"gitea.maximumdirect.net/eric/notarius/internal/modules/dnd/shared/diagnostics"
 )
 
 func TestNormalizeCanonicalizesSubjectsEvidenceOrderAndDuplicates(t *testing.T) {
@@ -162,7 +161,7 @@ func TestNormalizerContractAndWarningBound(t *testing.T) {
 		t.Fatalf("unsafe metadata = %s, %v", encoded, err)
 	}
 
-	count := diagnostics.MaxWarnings + 5
+	count := contracts.MaxDiagnosticSamples + 5
 	document := &source.SourceDocument{ID: "session", Units: make([]source.SourceUnit, count)}
 	input := dnd.EnemyEventList{Events: make([]dnd.EnemyEvent, count)}
 	for index := range document.Units {
@@ -170,7 +169,7 @@ func TestNormalizerContractAndWarningBound(t *testing.T) {
 		input.Events[index] = dnd.EnemyEvent{Name: "  ÁRIA ", Kind: dnd.EnemyEventKindEngaged, SourceRefs: []source.SourceRef{{SourceID: document.ID, StartUnitID: count - index, EndUnitID: count - index}}}
 	}
 	result, err := normalizer.Normalize(context.Background(), normalizeRequest(document, input, contracts.ReferenceSet{}))
-	if err != nil || len(result.Warnings) != 0 || len(result.Diagnostics) == 0 {
+	if err != nil || len(result.Diagnostics) == 0 {
 		t.Fatalf("diagnostics = %#v, %v", result.Diagnostics, err)
 	}
 }

internal/modules/dnd/normalize/itemoccurrences/normalizer.go

@@ -120,18 +120,18 @@ type normalizedRecord struct {
 	inputIndex int
 }
 
-func normalizeList(input dnd.ItemOccurrenceList, index source.DocumentIndex, order shared.SourceRefOrder, registry *itemregistry.Registry) (dnd.ItemOccurrenceList, []contracts.Warning) {
+func normalizeList(input dnd.ItemOccurrenceList, index source.DocumentIndex, order shared.SourceRefOrder, registry *itemregistry.Registry) (dnd.ItemOccurrenceList, []diagnostics.Finding) {
 	if input.Occurrences == nil {
 		return dnd.ItemOccurrenceList{}, nil
 	}
 
 	records := make([]normalizedRecord, len(input.Occurrences))
-	warnings := make([]contracts.Warning, 0)
+	warnings := make([]diagnostics.Finding, 0)
 	for index, inputOccurrence := range input.Occurrences {
 		occurrence, changedFields, found, refsChanged := normalizeOccurrence(inputOccurrence, order, registry)
 		records[index] = normalizedRecord{occurrence: occurrence, identity: itemoccurrencemodel.CanonicalExactIdentity(occurrence), inputIndex: index}
 		if len(changedFields) != 0 {
-			warnings = append(warnings, contracts.Warning{
+			warnings = append(warnings, diagnostics.Finding{
 				Scope:      occurrenceScope(index),
 				ReasonCode: ReasonCodeNameCanonicalized,
 				Message: fmt.Sprintf("input index %d: normalized display whitespace in %s", index,
@@ -139,15 +139,15 @@ func normalizeList(input dnd.ItemOccurrenceList, index source.DocumentIndex, ord
 			})
 		}
 		if found && inputOccurrence.Name != occurrence.Name {
-			warnings = append(warnings, contracts.Warning{Scope: occurrenceScope(index), ReasonCode: ReasonCodeNameCanonicalized,
+			warnings = append(warnings, diagnostics.Finding{Scope: occurrenceScope(index), ReasonCode: ReasonCodeNameCanonicalized,
 				Message: fmt.Sprintf("input index %d: item name canonicalized from %s to %s", index, diagnostics.Quote(inputOccurrence.Name), diagnostics.Quote(occurrence.Name))})
 		}
 		if !found {
-			warnings = append(warnings, contracts.Warning{Scope: occurrenceScope(index), ReasonCode: ReasonCodeUnknownItemID,
+			warnings = append(warnings, diagnostics.Finding{Scope: occurrenceScope(index), ReasonCode: ReasonCodeUnknownItemID,
 				Message: fmt.Sprintf("input index %d: item ID %s is not in the supplied registry", index, diagnostics.Quote(inputOccurrence.ItemID))})
 		}
 		if refsChanged {
-			warnings = append(warnings, contracts.Warning{
+			warnings = append(warnings, diagnostics.Finding{
 				Scope:      occurrenceScope(index),
 				ReasonCode: ReasonCodeSourceRefsNormalized,
 				Message: fmt.Sprintf("input index %d: source references normalized (original count %d, final count %d)",
@@ -163,7 +163,7 @@ func normalizeList(input dnd.ItemOccurrenceList, index source.DocumentIndex, ord
 		if position == record.inputIndex {
 			continue
 		}
-		warnings = append(warnings, contracts.Warning{
+		warnings = append(warnings, diagnostics.Finding{
 			Scope:      occurrenceScope(record.inputIndex),
 			ReasonCode: ReasonCodeOccurrencesReordered,
 			Message:    fmt.Sprintf("input index %d moved to normalized position %d", record.inputIndex, position),
@@ -217,7 +217,7 @@ type duplicateGroup struct {
 	removed        []int
 }
 
-func collapseDuplicates(records []normalizedRecord, index source.DocumentIndex) ([]dnd.ItemOccurrence, []contracts.Warning) {
+func collapseDuplicates(records []normalizedRecord, index source.DocumentIndex) ([]dnd.ItemOccurrence, []diagnostics.Finding) {
 	if len(records) == 0 {
 		return make([]dnd.ItemOccurrence, 0), nil
 	}
@@ -253,7 +253,7 @@ func collapseDuplicates(records []normalizedRecord, index source.DocumentIndex)
 			output = append(output, cloneOccurrence(record.occurrence))
 		}
 	}
-	warnings := make([]contracts.Warning, 0)
+	warnings := make([]diagnostics.Finding, 0)
 	for _, group := range groups {
 		if len(group.removed) != 0 {
 			warnings = append(warnings, duplicateWarning(group.retainedIndex, group.removed))
@@ -262,12 +262,12 @@ func collapseDuplicates(records []normalizedRecord, index source.DocumentIndex)
 	return output, warnings
 }
 
-func duplicateWarning(retainedIndex int, removed []int) contracts.Warning {
+func duplicateWarning(retainedIndex int, removed []int) diagnostics.Finding {
 	issues := make([]string, len(removed))
 	for index, removedIndex := range removed {
 		issues[index] = fmt.Sprintf("removed input index %d", removedIndex)
 	}
-	return contracts.Warning{
+	return diagnostics.Finding{
 		Scope:      occurrenceScope(retainedIndex),
 		ReasonCode: ReasonCodeDuplicateCollapsed,
 		Message: diagnostics.Aggregate(

internal/modules/dnd/normalize/itemregistry/normalizer.go

@@ -149,11 +149,11 @@ func (n *Normalizer) Normalize(ctx context.Context, req contracts.TypedNormalize
 	return retryResult(recordList(applied), findings, advisoryFindings, reconciliation, rejectedGroups)
 }
 
-func (n *Normalizer) invalidStructuredResult(value dnd.ItemRegistry, findings []contracts.Warning) (contracts.TypedNormalizeResult[dnd.ItemRegistry], error) {
+func (n *Normalizer) invalidStructuredResult(value dnd.ItemRegistry, findings []diagnostics.Finding) (contracts.TypedNormalizeResult[dnd.ItemRegistry], error) {
 	return retryResultWithFallback(value, findings, nil, nil, ReasonCodeItemSemanticRetryProposalInvalid, "semantic proposal requires retry: invalid structured output", semanticFallbackFinding(-1))
 }
 
-func retryResult(value dnd.ItemRegistry, findings, advisoryFindings []contracts.Warning, reconciliation semanticreconcile.Result, rejectedGroups int) (contracts.TypedNormalizeResult[dnd.ItemRegistry], error) {
+func retryResult(value dnd.ItemRegistry, findings, advisoryFindings []diagnostics.Finding, reconciliation semanticreconcile.Result, rejectedGroups int) (contracts.TypedNormalizeResult[dnd.ItemRegistry], error) {
 	details := semanticreconcile.IssueDetails(reconciliation.Issues())
 	if rejectedGroups > 0 {
 		details = append(details, "currency may only be consolidated with aliases of one denomination")
@@ -162,15 +162,15 @@ func retryResult(value dnd.ItemRegistry, findings, advisoryFindings []contracts.
 	return retryResultWithFallback(value, findings, advisoryFindings, reconciliation.ModelCandidate(), ReasonCodeItemSemanticRetryProposalInvalid, diagnostics.Aggregate("semantic proposal requires retry", details), semanticFallbackFinding(discardedGroups))
 }
 
-func semanticFallbackFinding(discarded int) contracts.Warning {
+func semanticFallbackFinding(discarded int) diagnostics.Finding {
 	message := "semantic proposal could not be applied"
 	if discarded >= 0 {
 		message = fmt.Sprintf("%d proposal group(s) omitted after semantic proposal retry exhaustion", discarded)
 	}
-	return contracts.Warning{Scope: "items", ReasonCode: ReasonCodeItemSemanticReconciliationExhausted, Message: message}
+	return diagnostics.Finding{Scope: "items", ReasonCode: ReasonCodeItemSemanticReconciliationExhausted, Message: message}
 }
 
-func normalizationResult(value dnd.ItemRegistry, findings, advisoryFindings []contracts.Warning, candidate *contracts.ModelCandidate) (contracts.TypedNormalizeResult[dnd.ItemRegistry], error) {
+func normalizationResult(value dnd.ItemRegistry, findings, advisoryFindings []diagnostics.Finding, candidate *contracts.ModelCandidate) (contracts.TypedNormalizeResult[dnd.ItemRegistry], error) {
 	diagnosticGroups, err := diagnostics.Collect(findings, contracts.DiagnosticDispositionObservation, contracts.DiagnosticCategoryNormalization)
 	if err != nil {
 		return contracts.TypedNormalizeResult[dnd.ItemRegistry]{}, normalizerErrorf("collect normalization diagnostics: %w", err)
@@ -183,12 +183,12 @@ func normalizationResult(value dnd.ItemRegistry, findings, advisoryFindings []co
 	return contracts.TypedNormalizeResult[dnd.ItemRegistry]{Value: value, Diagnostics: diagnosticGroups, ModelCandidate: candidate}, nil
 }
 
-func fallbackResult(value dnd.ItemRegistry, findings, advisoryFindings []contracts.Warning, fallback contracts.Warning) (contracts.TypedNormalizeResult[dnd.ItemRegistry], error) {
+func fallbackResult(value dnd.ItemRegistry, findings, advisoryFindings []diagnostics.Finding, fallback diagnostics.Finding) (contracts.TypedNormalizeResult[dnd.ItemRegistry], error) {
 	result, err := normalizationResult(value, findings, advisoryFindings, nil)
 	if err != nil {
 		return contracts.TypedNormalizeResult[dnd.ItemRegistry]{}, err
 	}
-	fallbackGroups, err := diagnostics.Collect([]contracts.Warning{fallback}, contracts.DiagnosticDispositionWarning, contracts.DiagnosticCategoryFallback)
+	fallbackGroups, err := diagnostics.Collect([]diagnostics.Finding{fallback}, contracts.DiagnosticDispositionWarning, contracts.DiagnosticCategoryFallback)
 	if err != nil {
 		return contracts.TypedNormalizeResult[dnd.ItemRegistry]{}, normalizerErrorf("collect fallback diagnostic: %w", err)
 	}
@@ -196,12 +196,12 @@ func fallbackResult(value dnd.ItemRegistry, findings, advisoryFindings []contrac
 	return result, nil
 }
 
-func retryResultWithFallback(value dnd.ItemRegistry, findings, advisoryFindings []contracts.Warning, candidate *contracts.ModelCandidate, reasonCode, message string, fallback contracts.Warning) (contracts.TypedNormalizeResult[dnd.ItemRegistry], error) {
+func retryResultWithFallback(value dnd.ItemRegistry, findings, advisoryFindings []diagnostics.Finding, candidate *contracts.ModelCandidate, reasonCode, message string, fallback diagnostics.Finding) (contracts.TypedNormalizeResult[dnd.ItemRegistry], error) {
 	result, err := normalizationResult(value, findings, advisoryFindings, candidate)
 	if err != nil {
 		return contracts.TypedNormalizeResult[dnd.ItemRegistry]{}, err
 	}
-	fallbackGroups, err := diagnostics.Collect([]contracts.Warning{fallback}, contracts.DiagnosticDispositionWarning, contracts.DiagnosticCategoryFallback)
+	fallbackGroups, err := diagnostics.Collect([]diagnostics.Finding{fallback}, contracts.DiagnosticDispositionWarning, contracts.DiagnosticCategoryFallback)
 	if err != nil {
 		return contracts.TypedNormalizeResult[dnd.ItemRegistry]{}, normalizerErrorf("collect fallback diagnostic: %w", err)
 	}
@@ -215,23 +215,23 @@ type normalizedRecord struct {
 	earliest     int
 }
 
-func preprocessRecords(input dnd.ItemRegistry, order shared.SourceRefOrder) ([]normalizedRecord, []contracts.Warning) {
+func preprocessRecords(input dnd.ItemRegistry, order shared.SourceRefOrder) ([]normalizedRecord, []diagnostics.Finding) {
 	if input.Items == nil {
 		return nil, nil
 	}
 	records := make([]normalizedRecord, len(input.Items))
-	findings := make([]contracts.Warning, 0)
+	findings := make([]diagnostics.Finding, 0)
 	for index, inputItem := range input.Items {
 		item, fieldsChanged, refsChanged := normalizeRecord(inputItem, order)
 		records[index] = normalizedRecord{item: item, inputIndexes: []int{index}, earliest: index}
 		if fieldsChanged {
-			findings = append(findings, contracts.Warning{Scope: itemScope(index), ReasonCode: ReasonCodeItemFieldsNormalized, Message: fmt.Sprintf("input index %d: item name normalized for %s", index, diagnostics.Quote(inputItem.Name))})
+			findings = append(findings, diagnostics.Finding{Scope: itemScope(index), ReasonCode: ReasonCodeItemFieldsNormalized, Message: fmt.Sprintf("input index %d: item name normalized for %s", index, diagnostics.Quote(inputItem.Name))})
 		}
 		if refsChanged {
-			findings = append(findings, contracts.Warning{Scope: itemScope(index), ReasonCode: ReasonCodeSourceReferencesNormalized, Message: fmt.Sprintf("input index %d: source references normalized (original count %d, final count %d)", index, len(inputItem.SourceRefs), len(item.SourceRefs))})
+			findings = append(findings, diagnostics.Finding{Scope: itemScope(index), ReasonCode: ReasonCodeSourceReferencesNormalized, Message: fmt.Sprintf("input index %d: source references normalized (original count %d, final count %d)", index, len(inputItem.SourceRefs), len(item.SourceRefs))})
 		}
 		if inputItem.ID != item.ID {
-			findings = append(findings, contracts.Warning{Scope: itemScope(index), ReasonCode: ReasonCodeItemIDRecomputed, Message: fmt.Sprintf("input index %d: item ID recomputed from %s", index, diagnostics.Quote(item.Name))})
+			findings = append(findings, diagnostics.Finding{Scope: itemScope(index), ReasonCode: ReasonCodeItemIDRecomputed, Message: fmt.Sprintf("input index %d: item ID recomputed from %s", index, diagnostics.Quote(item.Name))})
 		}
 	}
 	groups := comparisonNameGroups(records)
@@ -328,7 +328,7 @@ func recordList(records []normalizedRecord) dnd.ItemRegistry {
 	return dnd.ItemRegistry{Items: recordValues(records)}
 }
 
-func duplicateWarning(retainedIndex int, removed []int) contracts.Warning {
+func duplicateWarning(retainedIndex int, removed []int) diagnostics.Finding {
 	const maxDisplayedIndices = 20
 	displayed := removed
 	if len(displayed) > maxDisplayedIndices {
@@ -342,7 +342,7 @@ func duplicateWarning(retainedIndex int, removed []int) contracts.Warning {
 	if omitted := len(removed) - len(displayed); omitted > 0 {
 		message += fmt.Sprintf("; %d additional removed input indices omitted", omitted)
 	}
-	return contracts.Warning{Scope: itemScope(retainedIndex), ReasonCode: ReasonCodeDuplicateItemCollapsed, Message: message}
+	return diagnostics.Finding{Scope: itemScope(retainedIndex), ReasonCode: ReasonCodeDuplicateItemCollapsed, Message: message}
 }
 func itemScope(index int) string { return fmt.Sprintf("items[%d]", index) }
 

internal/modules/dnd/normalize/itemregistry/reconciliation.go

@@ -4,7 +4,6 @@ import (
 	"fmt"
 	"sort"
 
-	"gitea.maximumdirect.net/eric/notarius/internal/framework/contracts"
 	"gitea.maximumdirect.net/eric/notarius/internal/framework/semanticreconcile"
 	"gitea.maximumdirect.net/eric/notarius/internal/modules/dnd"
 	"gitea.maximumdirect.net/eric/notarius/internal/modules/dnd/items/identity"
@@ -31,7 +30,7 @@ func reconciliationInputs(records []normalizedRecord) ([]semanticreconcile.Candi
 	return candidates, envelopes, nil
 }
 
-func applyReconciliationPlan(plan semanticreconcile.Plan, records []normalizedRecord, envelopes []semanticreconcile.Record[dnd.Item], order shared.SourceRefOrder) ([]normalizedRecord, []contracts.Warning, []contracts.Warning, int, error) {
+func applyReconciliationPlan(plan semanticreconcile.Plan, records []normalizedRecord, envelopes []semanticreconcile.Record[dnd.Item], order shared.SourceRefOrder) ([]normalizedRecord, []diagnostics.Finding, []diagnostics.Finding, int, error) {
 	application, err := semanticreconcile.ApplyPlan(plan, envelopes, semanticreconcile.ApplicationPolicy[dnd.Item]{
 		CloneValue: cloneItem,
 		RejectGroup: func(members []dnd.Item, _ dnd.Item) semanticreconcile.RejectionCategory {
@@ -66,7 +65,7 @@ func applyReconciliationPlan(plan semanticreconcile.Plan, records []normalizedRe
 	}
 	type orderedFinding struct {
 		position int
-		finding  contracts.Warning
+		finding  diagnostics.Finding
 	}
 	observations := make([]orderedFinding, 0, len(application.AppliedGroups()))
 	advisories := make([]orderedFinding, 0, len(application.RejectedGroups()))
@@ -81,7 +80,7 @@ func applyReconciliationPlan(plan semanticreconcile.Plan, records []normalizedRe
 		provenance := event.Provenance()
 		advisories = append(advisories, orderedFinding{
 			position: provenance.EarliestInputPosition(),
-			finding: contracts.Warning{
+			finding: diagnostics.Finding{
 				Scope:      itemScope(provenance.EarliestInputPosition()),
 				ReasonCode: ReasonCodeItemSemanticProposalInvalid,
 				Message:    "proposal group preserved because currency may only be consolidated with aliases of one denomination",
@@ -90,11 +89,11 @@ func applyReconciliationPlan(plan semanticreconcile.Plan, records []normalizedRe
 	}
 	sort.SliceStable(observations, func(left, right int) bool { return observations[left].position < observations[right].position })
 	sort.SliceStable(advisories, func(left, right int) bool { return advisories[left].position < advisories[right].position })
-	observationFindings := make([]contracts.Warning, len(observations))
+	observationFindings := make([]diagnostics.Finding, len(observations))
 	for index, entry := range observations {
 		observationFindings[index] = entry.finding
 	}
-	advisoryFindings := make([]contracts.Warning, len(advisories))
+	advisoryFindings := make([]diagnostics.Finding, len(advisories))
 	for index, entry := range advisories {
 		advisoryFindings[index] = entry.finding
 	}
@@ -139,7 +138,7 @@ func currencyDenomination(name string) string {
 	}
 }
 
-func semanticDuplicateFinding(provenance semanticreconcile.GroupProvenance, canonical normalizedRecord) contracts.Warning {
+func semanticDuplicateFinding(provenance semanticreconcile.GroupProvenance, canonical normalizedRecord) diagnostics.Finding {
 	inputIndexes := provenance.OriginalInputIndexes()
 	details := make([]string, 0, len(inputIndexes)+1)
 	for _, inputIndex := range inputIndexes {
@@ -148,7 +147,7 @@ func semanticDuplicateFinding(provenance semanticreconcile.GroupProvenance, cano
 	if canonical.earliest != provenance.EarliestInputPosition() {
 		details = append(details, fmt.Sprintf("canonical display name from input index %d", canonical.earliest))
 	}
-	return contracts.Warning{
+	return diagnostics.Finding{
 		Scope:      itemScope(provenance.EarliestInputPosition()),
 		ReasonCode: ReasonCodeDuplicateItemCollapsed,
 		Message:    diagnostics.Aggregate("semantic duplicate consolidation", details),

internal/modules/dnd/normalize/locationoccurrences/normalizer.go

@@ -122,25 +122,25 @@ type normalizedRecord struct {
 
 type nameCanonicalization struct{ from, to string }
 
-func normalizeList(input dnd.LocationOccurrenceList, documentIndex source.DocumentIndex, order shared.SourceRefOrder, registry *locationregistry.Registry) (dnd.LocationOccurrenceList, []contracts.Warning) {
+func normalizeList(input dnd.LocationOccurrenceList, documentIndex source.DocumentIndex, order shared.SourceRefOrder, registry *locationregistry.Registry) (dnd.LocationOccurrenceList, []diagnostics.Finding) {
 	if input.Occurrences == nil {
 		return dnd.LocationOccurrenceList{}, nil
 	}
 	records := make([]normalizedRecord, len(input.Occurrences))
-	warnings := make([]contracts.Warning, 0)
+	warnings := make([]diagnostics.Finding, 0)
 	for index, inputOccurrence := range input.Occurrences {
 		occurrence, change, found, refsChanged := normalizeOccurrence(inputOccurrence, order, registry)
 		records[index] = normalizedRecord{occurrence: occurrence, inputIndex: index}
 		if change != nil {
-			warnings = append(warnings, contracts.Warning{Scope: occurrenceScope(index), ReasonCode: ReasonCodeNameCanonicalized,
+			warnings = append(warnings, diagnostics.Finding{Scope: occurrenceScope(index), ReasonCode: ReasonCodeNameCanonicalized,
 				Message: fmt.Sprintf("input index %d: location name canonicalized from %s to %s", index, diagnostics.Quote(change.from), diagnostics.Quote(change.to))})
 		}
 		if !found {
-			warnings = append(warnings, contracts.Warning{Scope: occurrenceScope(index), ReasonCode: ReasonCodeUnknownLocationID,
+			warnings = append(warnings, diagnostics.Finding{Scope: occurrenceScope(index), ReasonCode: ReasonCodeUnknownLocationID,
 				Message: fmt.Sprintf("input index %d: location ID %s is not in the supplied registry", index, diagnostics.Quote(inputOccurrence.LocationID))})
 		}
 		if refsChanged {
-			warnings = append(warnings, contracts.Warning{Scope: occurrenceScope(index), ReasonCode: ReasonCodeSourceRefsNormalized,
+			warnings = append(warnings, diagnostics.Finding{Scope: occurrenceScope(index), ReasonCode: ReasonCodeSourceRefsNormalized,
 				Message: fmt.Sprintf("input index %d: source references normalized (original count %d, final count %d)", index, len(inputOccurrence.SourceRefs), len(occurrence.SourceRefs))})
 		}
 	}
@@ -149,7 +149,7 @@ func normalizeList(input dnd.LocationOccurrenceList, documentIndex source.Docume
 	})
 	for position, record := range records {
 		if position != record.inputIndex {
-			warnings = append(warnings, contracts.Warning{Scope: occurrenceScope(record.inputIndex), ReasonCode: ReasonCodeOccurrencesReordered,
+			warnings = append(warnings, diagnostics.Finding{Scope: occurrenceScope(record.inputIndex), ReasonCode: ReasonCodeOccurrencesReordered,
 				Message: fmt.Sprintf("input index %d moved to normalized position %d by canonical occurrence order", record.inputIndex, position)})
 		}
 	}
@@ -194,7 +194,7 @@ type duplicateGroup struct {
 	removed       []int
 }
 
-func collapseDuplicates(records []normalizedRecord, documentIndex source.DocumentIndex) ([]dnd.LocationOccurrence, []contracts.Warning) {
+func collapseDuplicates(records []normalizedRecord, documentIndex source.DocumentIndex) ([]dnd.LocationOccurrence, []diagnostics.Finding) {
 	if len(records) == 0 {
 		return make([]dnd.LocationOccurrence, 0), nil
 	}
@@ -222,7 +222,7 @@ func collapseDuplicates(records []normalizedRecord, documentIndex source.Documen
 			output = append(output, cloneOccurrence(record.occurrence))
 		}
 	}
-	warnings := make([]contracts.Warning, 0)
+	warnings := make([]diagnostics.Finding, 0)
 	for _, group := range groups {
 		if len(group.removed) > 0 {
 			warnings = append(warnings, duplicateWarning(group.retainedIndex, group.removed))
@@ -316,12 +316,12 @@ func sourceRefsLess(order shared.SourceRefOrder, left, right []source.SourceRef)
 	return len(left) < len(right)
 }
 
-func duplicateWarning(retainedIndex int, removed []int) contracts.Warning {
+func duplicateWarning(retainedIndex int, removed []int) diagnostics.Finding {
 	issues := make([]string, len(removed))
 	for index, removedIndex := range removed {
 		issues[index] = fmt.Sprintf("removed input index %d", removedIndex)
 	}
-	return contracts.Warning{Scope: occurrenceScope(retainedIndex), ReasonCode: ReasonCodeDuplicateCollapsed,
+	return diagnostics.Finding{Scope: occurrenceScope(retainedIndex), ReasonCode: ReasonCodeDuplicateCollapsed,
 		Message: diagnostics.Aggregate(fmt.Sprintf("duplicate location occurrence collapsed; retained input index %d", retainedIndex), issues)}
 }
 

internal/modules/dnd/normalize/locationoccurrences/normalizer_test.go

@@ -12,7 +12,6 @@ import (
 	"gitea.maximumdirect.net/eric/notarius/internal/modules/dnd"
 	locationcodec "gitea.maximumdirect.net/eric/notarius/internal/modules/dnd/codec/locationregistry"
 	"gitea.maximumdirect.net/eric/notarius/internal/modules/dnd/locations/identity"
-	"gitea.maximumdirect.net/eric/notarius/internal/modules/dnd/shared/diagnostics"
 )
 
 func TestNormalizeCanonicalizesNamesByIDAndClonesInputs(t *testing.T) {
@@ -125,7 +124,7 @@ func TestNormalizerContractsRequiredRegistryAndWarningBounds(t *testing.T) {
 		t.Fatalf("unbound registry error = %v", err)
 	}
 
-	count := diagnostics.MaxWarnings + 5
+	count := contracts.MaxDiagnosticSamples + 5
 	doc := &source.SourceDocument{ID: "session", Units: make([]source.SourceUnit, count)}
 	input := dnd.LocationOccurrenceList{Occurrences: make([]dnd.LocationOccurrence, count)}
 	location := registryLocations("The Mill").Locations[0]
@@ -134,7 +133,7 @@ func TestNormalizerContractsRequiredRegistryAndWarningBounds(t *testing.T) {
 		input.Occurrences[index] = dnd.LocationOccurrence{LocationID: location.ID, Name: "not canonical", Kind: dnd.LocationOccurrenceKindMentioned, SourceRefs: []source.SourceRef{{SourceID: doc.ID, StartUnitID: count - index, EndUnitID: count - index}}}
 	}
 	bounded, err := newNormalizer(t, registryReferences(t, dnd.LocationRegistry{Locations: []dnd.Location{location}})).Normalize(context.Background(), normalizeRequest(input, doc, contracts.ReferenceSet{}))
-	if err != nil || len(bounded.Warnings) != 0 || len(bounded.Diagnostics) == 0 {
+	if err != nil || len(bounded.Diagnostics) == 0 {
 		t.Fatalf("bounded diagnostics = %#v, %v", bounded.Diagnostics, err)
 	}
 }

internal/modules/dnd/normalize/locationregistry/normalizer.go

@@ -148,23 +148,23 @@ func (n *Normalizer) Normalize(ctx context.Context, req contracts.TypedNormalize
 	return retryResult(recordList(applied), findings, reconciliation)
 }
 
-func (n *Normalizer) invalidStructuredResult(value dnd.LocationRegistry, findings []contracts.Warning) (contracts.TypedNormalizeResult[dnd.LocationRegistry], error) {
+func (n *Normalizer) invalidStructuredResult(value dnd.LocationRegistry, findings []diagnostics.Finding) (contracts.TypedNormalizeResult[dnd.LocationRegistry], error) {
 	return retryResultWithFallback(value, findings, nil, "semantic proposal requires retry: invalid structured output", semanticFallbackFinding(-1))
 }
 
-func retryResult(value dnd.LocationRegistry, findings []contracts.Warning, reconciliation semanticreconcile.Result) (contracts.TypedNormalizeResult[dnd.LocationRegistry], error) {
+func retryResult(value dnd.LocationRegistry, findings []diagnostics.Finding, reconciliation semanticreconcile.Result) (contracts.TypedNormalizeResult[dnd.LocationRegistry], error) {
 	return retryResultWithFallback(value, findings, reconciliation.ModelCandidate(), diagnostics.Aggregate("semantic proposal requires retry", semanticreconcile.IssueDetails(reconciliation.Issues())), semanticFallbackFinding(reconciliation.DiscardedGroupCount()))
 }
 
-func semanticFallbackFinding(discarded int) contracts.Warning {
+func semanticFallbackFinding(discarded int) diagnostics.Finding {
 	message := "semantic proposal could not be applied"
 	if discarded >= 0 {
 		message = fmt.Sprintf("%d proposal group(s) omitted after semantic proposal retry exhaustion", discarded)
 	}
-	return contracts.Warning{Scope: "locations", ReasonCode: ReasonCodeLocationSemanticReconciliationExhausted, Message: message}
+	return diagnostics.Finding{Scope: "locations", ReasonCode: ReasonCodeLocationSemanticReconciliationExhausted, Message: message}
 }
 
-func normalizationResult(value dnd.LocationRegistry, findings []contracts.Warning, candidate *contracts.ModelCandidate) (contracts.TypedNormalizeResult[dnd.LocationRegistry], error) {
+func normalizationResult(value dnd.LocationRegistry, findings []diagnostics.Finding, candidate *contracts.ModelCandidate) (contracts.TypedNormalizeResult[dnd.LocationRegistry], error) {
 	diagnosticGroups, err := diagnostics.Collect(findings, contracts.DiagnosticDispositionObservation, contracts.DiagnosticCategoryNormalization)
 	if err != nil {
 		return contracts.TypedNormalizeResult[dnd.LocationRegistry]{}, normalizerErrorf("collect normalization diagnostics: %w", err)
@@ -172,12 +172,12 @@ func normalizationResult(value dnd.LocationRegistry, findings []contracts.Warnin
 	return contracts.TypedNormalizeResult[dnd.LocationRegistry]{Value: value, Diagnostics: diagnosticGroups, ModelCandidate: candidate}, nil
 }
 
-func fallbackResult(value dnd.LocationRegistry, findings []contracts.Warning, fallback contracts.Warning) (contracts.TypedNormalizeResult[dnd.LocationRegistry], error) {
+func fallbackResult(value dnd.LocationRegistry, findings []diagnostics.Finding, fallback diagnostics.Finding) (contracts.TypedNormalizeResult[dnd.LocationRegistry], error) {
 	result, err := normalizationResult(value, findings, nil)
 	if err != nil {
 		return contracts.TypedNormalizeResult[dnd.LocationRegistry]{}, err
 	}
-	fallbackGroups, err := diagnostics.Collect([]contracts.Warning{fallback}, contracts.DiagnosticDispositionWarning, contracts.DiagnosticCategoryFallback)
+	fallbackGroups, err := diagnostics.Collect([]diagnostics.Finding{fallback}, contracts.DiagnosticDispositionWarning, contracts.DiagnosticCategoryFallback)
 	if err != nil {
 		return contracts.TypedNormalizeResult[dnd.LocationRegistry]{}, normalizerErrorf("collect fallback diagnostic: %w", err)
 	}
@@ -185,12 +185,12 @@ func fallbackResult(value dnd.LocationRegistry, findings []contracts.Warning, fa
 	return result, nil
 }
 
-func retryResultWithFallback(value dnd.LocationRegistry, findings []contracts.Warning, candidate *contracts.ModelCandidate, message string, fallback contracts.Warning) (contracts.TypedNormalizeResult[dnd.LocationRegistry], error) {
+func retryResultWithFallback(value dnd.LocationRegistry, findings []diagnostics.Finding, candidate *contracts.ModelCandidate, message string, fallback diagnostics.Finding) (contracts.TypedNormalizeResult[dnd.LocationRegistry], error) {
 	result, err := normalizationResult(value, findings, candidate)
 	if err != nil {
 		return contracts.TypedNormalizeResult[dnd.LocationRegistry]{}, err
 	}
-	fallbackGroups, err := diagnostics.Collect([]contracts.Warning{fallback}, contracts.DiagnosticDispositionWarning, contracts.DiagnosticCategoryFallback)
+	fallbackGroups, err := diagnostics.Collect([]diagnostics.Finding{fallback}, contracts.DiagnosticDispositionWarning, contracts.DiagnosticCategoryFallback)
 	if err != nil {
 		return contracts.TypedNormalizeResult[dnd.LocationRegistry]{}, normalizerErrorf("collect fallback diagnostic: %w", err)
 	}
@@ -204,23 +204,23 @@ type normalizedRecord struct {
 	earliest     int
 }
 
-func preprocessRecords(input dnd.LocationRegistry, order shared.SourceRefOrder) ([]normalizedRecord, []contracts.Warning) {
+func preprocessRecords(input dnd.LocationRegistry, order shared.SourceRefOrder) ([]normalizedRecord, []diagnostics.Finding) {
 	if input.Locations == nil {
 		return nil, nil
 	}
 	records := make([]normalizedRecord, len(input.Locations))
-	warnings := make([]contracts.Warning, 0)
+	warnings := make([]diagnostics.Finding, 0)
 	for index, inputLocation := range input.Locations {
 		location, fieldsChanged, refsChanged := normalizeRecord(inputLocation, order)
 		records[index] = normalizedRecord{location: location, inputIndexes: []int{index}, earliest: index}
 		if fieldsChanged {
-			warnings = append(warnings, contracts.Warning{Scope: locationScope(index), ReasonCode: ReasonCodeLocationFieldsNormalized, Message: fmt.Sprintf("input index %d: location name normalized for %s", index, diagnostics.Quote(inputLocation.Name))})
+			warnings = append(warnings, diagnostics.Finding{Scope: locationScope(index), ReasonCode: ReasonCodeLocationFieldsNormalized, Message: fmt.Sprintf("input index %d: location name normalized for %s", index, diagnostics.Quote(inputLocation.Name))})
 		}
 		if refsChanged {
-			warnings = append(warnings, contracts.Warning{Scope: locationScope(index), ReasonCode: ReasonCodeSourceReferencesNormalized, Message: fmt.Sprintf("input index %d: source references normalized (original count %d, final count %d)", index, len(inputLocation.SourceRefs), len(location.SourceRefs))})
+			warnings = append(warnings, diagnostics.Finding{Scope: locationScope(index), ReasonCode: ReasonCodeSourceReferencesNormalized, Message: fmt.Sprintf("input index %d: source references normalized (original count %d, final count %d)", index, len(inputLocation.SourceRefs), len(location.SourceRefs))})
 		}
 		if inputLocation.ID != location.ID {
-			warnings = append(warnings, contracts.Warning{Scope: locationScope(index), ReasonCode: ReasonCodeLocationIDRecomputed, Message: fmt.Sprintf("input index %d: location ID recomputed from %s", index, diagnostics.Quote(location.Name))})
+			warnings = append(warnings, diagnostics.Finding{Scope: locationScope(index), ReasonCode: ReasonCodeLocationIDRecomputed, Message: fmt.Sprintf("input index %d: location ID recomputed from %s", index, diagnostics.Quote(location.Name))})
 		}
 	}
 	groups := exactDuplicateGroups(records)
@@ -342,7 +342,7 @@ func recordList(records []normalizedRecord) dnd.LocationRegistry {
 	return dnd.LocationRegistry{Locations: recordValues(records)}
 }
 
-func duplicateWarning(retainedIndex int, removed []int) contracts.Warning {
+func duplicateWarning(retainedIndex int, removed []int) diagnostics.Finding {
 	const maxDisplayedIndices = 20
 	displayed := removed
 	if len(displayed) > maxDisplayedIndices {
@@ -356,7 +356,7 @@ func duplicateWarning(retainedIndex int, removed []int) contracts.Warning {
 	if omitted := len(removed) - len(displayed); omitted > 0 {
 		message += fmt.Sprintf("; %d additional removed input indices omitted", omitted)
 	}
-	return contracts.Warning{Scope: locationScope(retainedIndex), ReasonCode: ReasonCodeDuplicateLocationCollapsed, Message: message}
+	return diagnostics.Finding{Scope: locationScope(retainedIndex), ReasonCode: ReasonCodeDuplicateLocationCollapsed, Message: message}
 }
 func locationScope(index int) string { return fmt.Sprintf("locations[%d]", index) }
 

internal/modules/dnd/normalize/locationregistry/reconciliation.go

@@ -3,7 +3,6 @@ package locationregistry
 import (
 	"fmt"
 
-	"gitea.maximumdirect.net/eric/notarius/internal/framework/contracts"
 	"gitea.maximumdirect.net/eric/notarius/internal/framework/semanticreconcile"
 	"gitea.maximumdirect.net/eric/notarius/internal/modules/dnd"
 	"gitea.maximumdirect.net/eric/notarius/internal/modules/dnd/locations/identity"
@@ -28,7 +27,7 @@ func reconciliationInputs(records []normalizedRecord) ([]semanticreconcile.Candi
 	return candidates, envelopes, nil
 }
 
-func applyReconciliationPlan(plan semanticreconcile.Plan, records []normalizedRecord, envelopes []semanticreconcile.Record[dnd.Location], order shared.SourceRefOrder) ([]normalizedRecord, []contracts.Warning, error) {
+func applyReconciliationPlan(plan semanticreconcile.Plan, records []normalizedRecord, envelopes []semanticreconcile.Record[dnd.Location], order shared.SourceRefOrder) ([]normalizedRecord, []diagnostics.Finding, error) {
 	application, err := semanticreconcile.ApplyPlan(plan, envelopes, semanticreconcile.ApplicationPolicy[dnd.Location]{
 		CloneValue: cloneLocation,
 		ConsolidateGroup: func(members []dnd.Location, canonical dnd.Location) (dnd.Location, error) {
@@ -55,7 +54,7 @@ func applyReconciliationPlan(plan semanticreconcile.Plan, records []normalizedRe
 			earliest:     record.EarliestInputPosition(),
 		}
 	}
-	warnings := make([]contracts.Warning, 0, len(application.AppliedGroups()))
+	warnings := make([]diagnostics.Finding, 0, len(application.AppliedGroups()))
 	for _, event := range application.AppliedGroups() {
 		provenance := event.Provenance()
 		warnings = append(warnings, semanticDuplicateWarning(provenance, records[provenance.CanonicalPosition()]))
@@ -63,7 +62,7 @@ func applyReconciliationPlan(plan semanticreconcile.Plan, records []normalizedRe
 	return output, warnings, nil
 }
 
-func semanticDuplicateWarning(provenance semanticreconcile.GroupProvenance, canonical normalizedRecord) contracts.Warning {
+func semanticDuplicateWarning(provenance semanticreconcile.GroupProvenance, canonical normalizedRecord) diagnostics.Finding {
 	inputIndexes := provenance.OriginalInputIndexes()
 	details := make([]string, 0, len(inputIndexes)+1)
 	for _, inputIndex := range inputIndexes {
@@ -72,7 +71,7 @@ func semanticDuplicateWarning(provenance semanticreconcile.GroupProvenance, cano
 	if canonical.earliest != provenance.EarliestInputPosition() {
 		details = append(details, fmt.Sprintf("canonical display name from input index %d", canonical.earliest))
 	}
-	return contracts.Warning{
+	return diagnostics.Finding{
 		Scope:      locationScope(provenance.EarliestInputPosition()),
 		ReasonCode: ReasonCodeDuplicateLocationCollapsed,
 		Message:    diagnostics.Aggregate("semantic duplicate consolidation", details),

internal/modules/dnd/normalize/npcoccurrences/normalizer.go

@@ -124,13 +124,13 @@ type normalizedRecord struct {
 	inputIndex int
 }
 
-func normalizeList(input dnd.NPCOccurrenceList, documentIndex source.DocumentIndex, order shared.SourceRefOrder, registry *npcregistry.Registry) (dnd.NPCOccurrenceList, []contracts.Warning, error) {
+func normalizeList(input dnd.NPCOccurrenceList, documentIndex source.DocumentIndex, order shared.SourceRefOrder, registry *npcregistry.Registry) (dnd.NPCOccurrenceList, []diagnostics.Finding, error) {
 	if input.Occurrences == nil {
 		return dnd.NPCOccurrenceList{}, nil, nil
 	}
 
 	records := make([]normalizedRecord, len(input.Occurrences))
-	warnings := make([]contracts.Warning, 0)
+	warnings := make([]diagnostics.Finding, 0)
 	for index, inputOccurrence := range input.Occurrences {
 		occurrence, refsChanged, err := normalizeOccurrence(inputOccurrence, order, registry)
 		if err != nil {
@@ -138,7 +138,7 @@ func normalizeList(input dnd.NPCOccurrenceList, documentIndex source.DocumentInd
 		}
 		records[index] = normalizedRecord{occurrence: occurrence, inputIndex: index}
 		if refsChanged {
-			warnings = append(warnings, contracts.Warning{
+			warnings = append(warnings, diagnostics.Finding{
 				Scope:      occurrenceScope(index),
 				ReasonCode: ReasonCodeSourceRefsNormalized,
 				Message: fmt.Sprintf("input index %d: source references normalized (original count %d, final count %d)",
@@ -154,7 +154,7 @@ func normalizeList(input dnd.NPCOccurrenceList, documentIndex source.DocumentInd
 		if position == record.inputIndex {
 			continue
 		}
-		warnings = append(warnings, contracts.Warning{
+		warnings = append(warnings, diagnostics.Finding{
 			Scope:      occurrenceScope(record.inputIndex),
 			ReasonCode: ReasonCodeOccurrencesReordered,
 			Message:    fmt.Sprintf("input index %d moved to normalized position %d by source chronology", record.inputIndex, position),
@@ -192,7 +192,7 @@ type duplicateGroup struct {
 	removed       []int
 }
 
-func collapseDuplicates(records []normalizedRecord, documentIndex source.DocumentIndex) ([]dnd.NPCOccurrence, []contracts.Warning) {
+func collapseDuplicates(records []normalizedRecord, documentIndex source.DocumentIndex) ([]dnd.NPCOccurrence, []diagnostics.Finding) {
 	if len(records) == 0 {
 		return make([]dnd.NPCOccurrence, 0), nil
 	}
@@ -220,7 +220,7 @@ func collapseDuplicates(records []normalizedRecord, documentIndex source.Documen
 			output = append(output, cloneOccurrence(record.occurrence))
 		}
 	}
-	warnings := make([]contracts.Warning, 0)
+	warnings := make([]diagnostics.Finding, 0)
 	for _, group := range groups {
 		if len(group.removed) != 0 {
 			warnings = append(warnings, duplicateWarning(group.retainedIndex, group.removed))
@@ -229,12 +229,12 @@ func collapseDuplicates(records []normalizedRecord, documentIndex source.Documen
 	return output, warnings
 }
 
-func duplicateWarning(retainedIndex int, removed []int) contracts.Warning {
+func duplicateWarning(retainedIndex int, removed []int) diagnostics.Finding {
 	issues := make([]string, len(removed))
 	for index, removedIndex := range removed {
 		issues[index] = fmt.Sprintf("removed input index %d", removedIndex)
 	}
-	return contracts.Warning{
+	return diagnostics.Finding{
 		Scope:      occurrenceScope(retainedIndex),
 		ReasonCode: ReasonCodeDuplicateCollapsed,
 		Message: diagnostics.Aggregate(

internal/modules/dnd/normalize/npcoccurrences/normalizer_test.go

@@ -11,7 +11,6 @@ import (
 	"gitea.maximumdirect.net/eric/notarius/internal/modules/dnd"
 	npccodec "gitea.maximumdirect.net/eric/notarius/internal/modules/dnd/codec/npcregistry"
 	"gitea.maximumdirect.net/eric/notarius/internal/modules/dnd/npcs/identity"
-	"gitea.maximumdirect.net/eric/notarius/internal/modules/dnd/shared/diagnostics"
 )
 
 func TestNormalizeValidatesPairsAndClones(t *testing.T) {
@@ -141,7 +140,7 @@ func TestNormalizerContractAndDeterministicWarnings(t *testing.T) {
 }
 
 func TestNormalizeBoundsWarnings(t *testing.T) {
-	count := diagnostics.MaxWarnings + 5
+	count := contracts.MaxDiagnosticSamples + 5
 	doc := &source.SourceDocument{ID: "session", Units: make([]source.SourceUnit, count)}
 	input := dnd.NPCOccurrenceList{Occurrences: make([]dnd.NPCOccurrence, count)}
 	for index := range doc.Units {
@@ -163,7 +162,7 @@ func TestNormalizeBoundsWarnings(t *testing.T) {
 	if err != nil {
 		t.Fatal(err)
 	}
-	if len(result.Warnings) != 0 || len(result.Diagnostics) == 0 || result.Diagnostics[0].Disposition != contracts.DiagnosticDispositionObservation {
+	if len(result.Diagnostics) == 0 || result.Diagnostics[0].Disposition != contracts.DiagnosticDispositionObservation {
 		t.Fatalf("diagnostics = %#v", result.Diagnostics)
 	}
 }

internal/modules/dnd/normalize/npcregistry/normalizer.go

@@ -147,23 +147,23 @@ func (n *Normalizer) Normalize(ctx context.Context, req contracts.TypedNormalize
 	return retryResult(recordList(applied), findings, reconciliation)
 }
 
-func (n *Normalizer) invalidStructuredResult(value dnd.NPCRegistry, findings []contracts.Warning) (contracts.TypedNormalizeResult[dnd.NPCRegistry], error) {
+func (n *Normalizer) invalidStructuredResult(value dnd.NPCRegistry, findings []diagnostics.Finding) (contracts.TypedNormalizeResult[dnd.NPCRegistry], error) {
 	return retryResultWithFallback(value, findings, nil, "semantic proposal requires retry: invalid structured output", semanticFallbackFinding(-1))
 }
 
-func retryResult(value dnd.NPCRegistry, findings []contracts.Warning, reconciliation semanticreconcile.Result) (contracts.TypedNormalizeResult[dnd.NPCRegistry], error) {
+func retryResult(value dnd.NPCRegistry, findings []diagnostics.Finding, reconciliation semanticreconcile.Result) (contracts.TypedNormalizeResult[dnd.NPCRegistry], error) {
 	return retryResultWithFallback(value, findings, reconciliation.ModelCandidate(), diagnostics.Aggregate("semantic proposal requires retry", semanticreconcile.IssueDetails(reconciliation.Issues())), semanticFallbackFinding(reconciliation.DiscardedGroupCount()))
 }
 
-func semanticFallbackFinding(discardedGroups int) contracts.Warning {
+func semanticFallbackFinding(discardedGroups int) diagnostics.Finding {
 	message := "semantic proposal could not be applied"
 	if discardedGroups >= 0 {
 		message = fmt.Sprintf("%d proposal group(s) omitted after semantic proposal retry exhaustion", discardedGroups)
 	}
-	return contracts.Warning{Scope: "npcs", ReasonCode: ReasonCodeNPCSemanticReconciliationExhausted, Message: message}
+	return diagnostics.Finding{Scope: "npcs", ReasonCode: ReasonCodeNPCSemanticReconciliationExhausted, Message: message}
 }
 
-func normalizationResult(value dnd.NPCRegistry, findings []contracts.Warning, candidate *contracts.ModelCandidate) (contracts.TypedNormalizeResult[dnd.NPCRegistry], error) {
+func normalizationResult(value dnd.NPCRegistry, findings []diagnostics.Finding, candidate *contracts.ModelCandidate) (contracts.TypedNormalizeResult[dnd.NPCRegistry], error) {
 	diagnosticGroups, err := diagnostics.Collect(findings, contracts.DiagnosticDispositionObservation, contracts.DiagnosticCategoryNormalization)
 	if err != nil {
 		return contracts.TypedNormalizeResult[dnd.NPCRegistry]{}, normalizerErrorf("collect normalization diagnostics: %w", err)
@@ -171,12 +171,12 @@ func normalizationResult(value dnd.NPCRegistry, findings []contracts.Warning, ca
 	return contracts.TypedNormalizeResult[dnd.NPCRegistry]{Value: value, Diagnostics: diagnosticGroups, ModelCandidate: candidate}, nil
 }
 
-func fallbackResult(value dnd.NPCRegistry, findings []contracts.Warning, fallback contracts.Warning) (contracts.TypedNormalizeResult[dnd.NPCRegistry], error) {
+func fallbackResult(value dnd.NPCRegistry, findings []diagnostics.Finding, fallback diagnostics.Finding) (contracts.TypedNormalizeResult[dnd.NPCRegistry], error) {
 	result, err := normalizationResult(value, findings, nil)
 	if err != nil {
 		return contracts.TypedNormalizeResult[dnd.NPCRegistry]{}, err
 	}
-	fallbackGroups, err := diagnostics.Collect([]contracts.Warning{fallback}, contracts.DiagnosticDispositionWarning, contracts.DiagnosticCategoryFallback)
+	fallbackGroups, err := diagnostics.Collect([]diagnostics.Finding{fallback}, contracts.DiagnosticDispositionWarning, contracts.DiagnosticCategoryFallback)
 	if err != nil {
 		return contracts.TypedNormalizeResult[dnd.NPCRegistry]{}, normalizerErrorf("collect fallback diagnostic: %w", err)
 	}
@@ -184,12 +184,12 @@ func fallbackResult(value dnd.NPCRegistry, findings []contracts.Warning, fallbac
 	return result, nil
 }
 
-func retryResultWithFallback(value dnd.NPCRegistry, findings []contracts.Warning, candidate *contracts.ModelCandidate, message string, fallback contracts.Warning) (contracts.TypedNormalizeResult[dnd.NPCRegistry], error) {
+func retryResultWithFallback(value dnd.NPCRegistry, findings []diagnostics.Finding, candidate *contracts.ModelCandidate, message string, fallback diagnostics.Finding) (contracts.TypedNormalizeResult[dnd.NPCRegistry], error) {
 	result, err := normalizationResult(value, findings, candidate)
 	if err != nil {
 		return contracts.TypedNormalizeResult[dnd.NPCRegistry]{}, err
 	}
-	fallbackGroups, err := diagnostics.Collect([]contracts.Warning{fallback}, contracts.DiagnosticDispositionWarning, contracts.DiagnosticCategoryFallback)
+	fallbackGroups, err := diagnostics.Collect([]diagnostics.Finding{fallback}, contracts.DiagnosticDispositionWarning, contracts.DiagnosticCategoryFallback)
 	if err != nil {
 		return contracts.TypedNormalizeResult[dnd.NPCRegistry]{}, normalizerErrorf("collect fallback diagnostic: %w", err)
 	}
@@ -203,23 +203,23 @@ type normalizedRecord struct {
 	earliest     int
 }
 
-func preprocessRecords(input dnd.NPCRegistry, order shared.SourceRefOrder) ([]normalizedRecord, []contracts.Warning) {
+func preprocessRecords(input dnd.NPCRegistry, order shared.SourceRefOrder) ([]normalizedRecord, []diagnostics.Finding) {
 	if input.NPCs == nil {
 		return nil, nil
 	}
 	records := make([]normalizedRecord, len(input.NPCs))
-	warnings := make([]contracts.Warning, 0)
+	warnings := make([]diagnostics.Finding, 0)
 	for index, inputNPC := range input.NPCs {
 		npc, fieldsChanged, referencesChanged := normalizeRecord(inputNPC, order)
 		records[index] = normalizedRecord{npc: npc, inputIndexes: []int{index}, earliest: index}
 		if fieldsChanged {
-			warnings = append(warnings, contracts.Warning{Scope: npcScope(index), ReasonCode: ReasonCodeNPCFieldsNormalized, Message: fmt.Sprintf("input index %d: NPC name normalized for %s", index, diagnostics.Quote(inputNPC.Name))})
+			warnings = append(warnings, diagnostics.Finding{Scope: npcScope(index), ReasonCode: ReasonCodeNPCFieldsNormalized, Message: fmt.Sprintf("input index %d: NPC name normalized for %s", index, diagnostics.Quote(inputNPC.Name))})
 		}
 		if referencesChanged {
-			warnings = append(warnings, contracts.Warning{Scope: npcScope(index), ReasonCode: ReasonCodeSourceReferencesNormalized, Message: fmt.Sprintf("input index %d: source references normalized (original count %d, final count %d)", index, len(inputNPC.SourceRefs), len(npc.SourceRefs))})
+			warnings = append(warnings, diagnostics.Finding{Scope: npcScope(index), ReasonCode: ReasonCodeSourceReferencesNormalized, Message: fmt.Sprintf("input index %d: source references normalized (original count %d, final count %d)", index, len(inputNPC.SourceRefs), len(npc.SourceRefs))})
 		}
 		if inputNPC.ID != npc.ID {
-			warnings = append(warnings, contracts.Warning{Scope: npcScope(index), ReasonCode: ReasonCodeNPCIDRecomputed, Message: fmt.Sprintf("input index %d: NPC ID recomputed from %s", index, diagnostics.Quote(npc.Name))})
+			warnings = append(warnings, diagnostics.Finding{Scope: npcScope(index), ReasonCode: ReasonCodeNPCIDRecomputed, Message: fmt.Sprintf("input index %d: NPC ID recomputed from %s", index, diagnostics.Quote(npc.Name))})
 		}
 	}
 
@@ -230,7 +230,7 @@ func preprocessRecords(input dnd.NPCRegistry, order shared.SourceRefOrder) ([]no
 		output = append(output, consolidated)
 		retainedIndex := consolidated.earliest
 		if referencesChanged {
-			warnings = append(warnings, contracts.Warning{Scope: npcScope(retainedIndex), ReasonCode: ReasonCodeSourceReferencesNormalized, Message: fmt.Sprintf("input index %d: source references normalized during identity consolidation (final count %d)", retainedIndex, len(consolidated.npc.SourceRefs))})
+			warnings = append(warnings, diagnostics.Finding{Scope: npcScope(retainedIndex), ReasonCode: ReasonCodeSourceReferencesNormalized, Message: fmt.Sprintf("input index %d: source references normalized during identity consolidation (final count %d)", retainedIndex, len(consolidated.npc.SourceRefs))})
 		}
 		if len(members) > 1 {
 			warnings = append(warnings, duplicateWarning(retainedIndex, memberInputIndexes(records, members[1:])))
@@ -340,7 +340,7 @@ func cloneSourceRefs(input []source.SourceRef) []source.SourceRef {
 	return append([]source.SourceRef(nil), input...)
 }
 
-func duplicateWarning(retainedIndex int, removed []int) contracts.Warning {
+func duplicateWarning(retainedIndex int, removed []int) diagnostics.Finding {
 	const maxDisplayedIndices = 20
 	displayed := removed
 	if len(displayed) > maxDisplayedIndices {
@@ -354,7 +354,7 @@ func duplicateWarning(retainedIndex int, removed []int) contracts.Warning {
 	if omitted := len(removed) - len(displayed); omitted > 0 {
 		message += fmt.Sprintf("; %d additional removed input indices omitted", omitted)
 	}
-	return contracts.Warning{Scope: npcScope(retainedIndex), ReasonCode: ReasonCodeDuplicateNPCCollapsed, Message: message}
+	return diagnostics.Finding{Scope: npcScope(retainedIndex), ReasonCode: ReasonCodeDuplicateNPCCollapsed, Message: message}
 }
 
 func npcScope(index int) string { return fmt.Sprintf("npcs[%d]", index) }

internal/modules/dnd/normalize/npcregistry/reconciliation.go

@@ -3,7 +3,6 @@ package npcregistry
 import (
 	"fmt"
 
-	"gitea.maximumdirect.net/eric/notarius/internal/framework/contracts"
 	"gitea.maximumdirect.net/eric/notarius/internal/framework/semanticreconcile"
 	"gitea.maximumdirect.net/eric/notarius/internal/modules/dnd"
 	"gitea.maximumdirect.net/eric/notarius/internal/modules/dnd/npcs/identity"
@@ -28,7 +27,7 @@ func reconciliationInputs(records []normalizedRecord) ([]semanticreconcile.Candi
 	return candidates, envelopes, nil
 }
 
-func applyReconciliationPlan(plan semanticreconcile.Plan, records []normalizedRecord, envelopes []semanticreconcile.Record[dnd.NPC], order shared.SourceRefOrder) ([]normalizedRecord, []contracts.Warning, error) {
+func applyReconciliationPlan(plan semanticreconcile.Plan, records []normalizedRecord, envelopes []semanticreconcile.Record[dnd.NPC], order shared.SourceRefOrder) ([]normalizedRecord, []diagnostics.Finding, error) {
 	application, err := semanticreconcile.ApplyPlan(plan, envelopes, semanticreconcile.ApplicationPolicy[dnd.NPC]{
 		CloneValue: cloneNPC,
 		ConsolidateGroup: func(members []dnd.NPC, canonical dnd.NPC) (dnd.NPC, error) {
@@ -55,7 +54,7 @@ func applyReconciliationPlan(plan semanticreconcile.Plan, records []normalizedRe
 			earliest:     record.EarliestInputPosition(),
 		}
 	}
-	warnings := make([]contracts.Warning, 0, len(application.AppliedGroups()))
+	warnings := make([]diagnostics.Finding, 0, len(application.AppliedGroups()))
 	for _, event := range application.AppliedGroups() {
 		provenance := event.Provenance()
 		warnings = append(warnings, semanticDuplicateWarning(provenance, records[provenance.CanonicalPosition()]))
@@ -63,7 +62,7 @@ func applyReconciliationPlan(plan semanticreconcile.Plan, records []normalizedRe
 	return output, warnings, nil
 }
 
-func semanticDuplicateWarning(provenance semanticreconcile.GroupProvenance, canonical normalizedRecord) contracts.Warning {
+func semanticDuplicateWarning(provenance semanticreconcile.GroupProvenance, canonical normalizedRecord) diagnostics.Finding {
 	inputIndexes := provenance.OriginalInputIndexes()
 	details := make([]string, 0, len(inputIndexes)+1)
 	for _, inputIndex := range inputIndexes {
@@ -72,7 +71,7 @@ func semanticDuplicateWarning(provenance semanticreconcile.GroupProvenance, cano
 	if canonical.earliest != provenance.EarliestInputPosition() {
 		details = append(details, fmt.Sprintf("canonical display name from input index %d", canonical.earliest))
 	}
-	return contracts.Warning{
+	return diagnostics.Finding{
 		Scope:      npcScope(provenance.EarliestInputPosition()),
 		ReasonCode: ReasonCodeDuplicateNPCCollapsed,
 		Message:    diagnostics.Aggregate("semantic duplicate consolidation", details),

internal/modules/dnd/normalize/scenedescriptions/normalizer.go

@@ -79,7 +79,7 @@ type normalizedScene struct {
 	inputIndex int
 }
 
-func normalizeList(input dnd.SceneDescriptionList, doc *source.SourceDocument) (dnd.SceneDescriptionList, []contracts.Warning, error) {
+func normalizeList(input dnd.SceneDescriptionList, doc *source.SourceDocument) (dnd.SceneDescriptionList, []diagnostics.Finding, error) {
 	if doc == nil {
 		return dnd.SceneDescriptionList{}, nil, fmt.Errorf("source document must not be nil")
 	}
@@ -92,7 +92,7 @@ func normalizeList(input dnd.SceneDescriptionList, doc *source.SourceDocument) (
 
 	documentIndex := source.NewDocumentIndex(doc)
 	records := make([]normalizedScene, len(input.Scenes))
-	warnings := make([]contracts.Warning, 0)
+	warnings := make([]diagnostics.Finding, 0)
 	for sceneIndex, scene := range input.Scenes {
 		originalTitle, originalSummary := scene.Title, scene.Summary
 		scene.Title = strings.TrimSpace(scene.Title)
@@ -104,7 +104,7 @@ func normalizeList(input dnd.SceneDescriptionList, doc *source.SourceDocument) (
 			return dnd.SceneDescriptionList{}, nil, fmt.Errorf("scenes[%d].source_ref: %s", sceneIndex, diagnostics.Truncate(err.Error()))
 		}
 		if originalTitle != scene.Title || originalSummary != scene.Summary {
-			warnings = append(warnings, contracts.Warning{
+			warnings = append(warnings, diagnostics.Finding{
 				Scope:      sceneScope(sceneIndex),
 				ReasonCode: ReasonCodeProseNormalized,
 				Message:    fmt.Sprintf("input index %d: title and/or summary whitespace normalized", sceneIndex),
@@ -125,7 +125,7 @@ func normalizeList(input dnd.SceneDescriptionList, doc *source.SourceDocument) (
 		if position == record.inputIndex {
 			continue
 		}
-		warnings = append(warnings, contracts.Warning{
+		warnings = append(warnings, diagnostics.Finding{
 			Scope:      sceneScope(record.inputIndex),
 			ReasonCode: ReasonCodeOrderNormalized,
 			Message: fmt.Sprintf("input index %d moved to normalized position %d by canonical scene order",
@@ -146,7 +146,7 @@ func normalizeList(input dnd.SceneDescriptionList, doc *source.SourceDocument) (
 			return dnd.SceneDescriptionList{}, nil, fmt.Errorf("source range %s has conflicting records", sourceRefLabel(scene.SourceRef))
 		}
 		if retainedIndex, ok := seen[scene]; ok {
-			warnings = append(warnings, contracts.Warning{
+			warnings = append(warnings, diagnostics.Finding{
 				Scope:      sceneScope(record.inputIndex),
 				ReasonCode: ReasonCodeDuplicateCollapsed,
 				Message: fmt.Sprintf("input index %d: exact duplicate scene collapsed; retained input index %d",

internal/modules/dnd/normalize/scenedescriptions/normalizer_test.go

@@ -11,7 +11,6 @@ import (
 	"gitea.maximumdirect.net/eric/notarius/internal/framework/contracts"
 	"gitea.maximumdirect.net/eric/notarius/internal/framework/pipeline"
 	"gitea.maximumdirect.net/eric/notarius/internal/modules/dnd"
-	"gitea.maximumdirect.net/eric/notarius/internal/modules/dnd/shared/diagnostics"
 )
 
 func TestNormalizeTrimsOrdersDeduplicatesAndOwnsOutput(t *testing.T) {
@@ -35,7 +34,7 @@ func TestNormalizeTrimsOrdersDeduplicatesAndOwnsOutput(t *testing.T) {
 	if !reflect.DeepEqual(result.Value.Scenes, want) {
 		t.Fatalf("scenes = %#v, want %#v", result.Value.Scenes, want)
 	}
-	if len(result.Warnings) != 0 || len(result.Diagnostics) != 3 || result.Diagnostics[0].ReasonCode != ReasonCodeProseNormalized || result.Diagnostics[0].OccurrenceCount != 4 || result.Diagnostics[1].ReasonCode != ReasonCodeOrderNormalized || result.Diagnostics[1].OccurrenceCount != 2 || result.Diagnostics[2].ReasonCode != ReasonCodeDuplicateCollapsed || result.Diagnostics[2].OccurrenceCount != 1 {
+	if len(result.Diagnostics) != 3 || result.Diagnostics[0].ReasonCode != ReasonCodeProseNormalized || result.Diagnostics[0].OccurrenceCount != 4 || result.Diagnostics[1].ReasonCode != ReasonCodeOrderNormalized || result.Diagnostics[1].OccurrenceCount != 2 || result.Diagnostics[2].ReasonCode != ReasonCodeDuplicateCollapsed || result.Diagnostics[2].OccurrenceCount != 1 {
 		t.Fatalf("diagnostics = %#v, want grouped prose, order, and duplicate observations", result.Diagnostics)
 	}
 	if !reflect.DeepEqual(input, before) {
@@ -55,7 +54,7 @@ func TestNormalizeTrimsOrdersDeduplicatesAndOwnsOutput(t *testing.T) {
 }
 
 func TestNormalizeLimitsCombinedSceneMutationWarnings(t *testing.T) {
-	count := diagnostics.MaxWarnings - 8
+	count := contracts.MaxDiagnosticSamples + 1
 	doc := &source.SourceDocument{ID: "session", Units: make([]source.SourceUnit, count)}
 	input := dnd.SceneDescriptionList{Scenes: make([]dnd.SceneDescription, count)}
 	for index := range input.Scenes {
@@ -70,7 +69,7 @@ func TestNormalizeLimitsCombinedSceneMutationWarnings(t *testing.T) {
 	if len(result.Value.Scenes) != count || result.Value.Scenes[0].SourceRef.StartUnitID != 1 {
 		t.Fatalf("normalized scenes = %#v, want unchanged canonical values", result.Value.Scenes)
 	}
-	if len(result.Warnings) != 0 || len(result.Diagnostics) != 2 || result.Diagnostics[0].ReasonCode != ReasonCodeProseNormalized || result.Diagnostics[0].Disposition != contracts.DiagnosticDispositionObservation || result.Diagnostics[0].OccurrenceCount != count || len(result.Diagnostics[0].Samples) != contracts.MaxDiagnosticSamples || result.Diagnostics[1].ReasonCode != ReasonCodeOrderNormalized || result.Diagnostics[1].OccurrenceCount != count {
+	if len(result.Diagnostics) != 2 || result.Diagnostics[0].ReasonCode != ReasonCodeProseNormalized || result.Diagnostics[0].Disposition != contracts.DiagnosticDispositionObservation || result.Diagnostics[0].OccurrenceCount != count || len(result.Diagnostics[0].Samples) != contracts.MaxDiagnosticSamples || result.Diagnostics[1].ReasonCode != ReasonCodeOrderNormalized || result.Diagnostics[1].OccurrenceCount != count {
 		t.Fatalf("diagnostics = %#v", result.Diagnostics)
 	}
 }

internal/modules/dnd/normalize/spells/normalizer.go

@@ -110,8 +110,8 @@ func (n *Normalizer) Normalize(ctx context.Context, req contracts.TypedNormalize
 	return contracts.TypedNormalizeResult[dnd.SpellList]{Value: value, Diagnostics: diagnosticGroups}, nil
 }
 
-func normalizeSpellList(input dnd.SpellList, catalog spellcatalog.EffectiveCatalog, order shared.SourceRefOrder) (dnd.SpellList, []contracts.Warning) {
+func normalizeSpellList(input dnd.SpellList, catalog spellcatalog.EffectiveCatalog, order shared.SourceRefOrder) (dnd.SpellList, []diagnostics.Finding) {
-	var warnings []contracts.Warning
+	var warnings []diagnostics.Finding
 	if input.SpellCasts == nil {
 		return dnd.SpellList{}, nil
 	}
@@ -121,7 +121,7 @@ func normalizeSpellList(input dnd.SpellList, catalog spellcatalog.EffectiveCatal
 		cast := cloneSpellCast(inputCast)
 		if canonicalName, ok := catalog.Lookup(inputCast.Spell); ok {
 			if inputCast.Spell != canonicalName {
-				warnings = append(warnings, contracts.Warning{
+				warnings = append(warnings, diagnostics.Finding{
 					Scope:      spellCastScope(index),
 					ReasonCode: ReasonCodeSpellNameCanonicalized,
 					Message: fmt.Sprintf("input index %d: spell name canonicalized from %q to %q",
@@ -130,7 +130,7 @@ func normalizeSpellList(input dnd.SpellList, catalog spellcatalog.EffectiveCatal
 			}
 			cast.Spell = canonicalName
 		} else {
-			warnings = append(warnings, contracts.Warning{
+			warnings = append(warnings, diagnostics.Finding{
 				Scope:      spellCastScope(index),
 				ReasonCode: ReasonCodeSpellNameUnresolved,
 				Message: fmt.Sprintf("input index %d: spell name %q could not be resolved in the effective catalog",
@@ -141,7 +141,7 @@ func normalizeSpellList(input dnd.SpellList, catalog spellcatalog.EffectiveCatal
 		canonicalRefs, orderChanged, duplicateCount := canonicalizeSourceRefs(order, inputCast.SourceRefs)
 		cast.SourceRefs = canonicalRefs
 		if orderChanged || duplicateCount > 0 {
-			warnings = append(warnings, contracts.Warning{
+			warnings = append(warnings, diagnostics.Finding{
 				Scope:      spellCastScope(index),
 				ReasonCode: ReasonCodeSourceReferencesNormalized,
 				Message: fmt.Sprintf("input index %d: source references normalized (original count %d, final count %d, order changed %t, duplicates removed %d)",
@@ -179,7 +179,7 @@ type duplicateGroup struct {
 	removed       []int
 }
 
-func collapseDuplicateSpellCasts(input dnd.SpellList, documentIndex source.DocumentIndex, catalog spellcatalog.EffectiveCatalog) (dnd.SpellList, []contracts.Warning) {
+func collapseDuplicateSpellCasts(input dnd.SpellList, documentIndex source.DocumentIndex, catalog spellcatalog.EffectiveCatalog) (dnd.SpellList, []diagnostics.Finding) {
 	if len(input.SpellCasts) == 0 {
 		return input, nil
 	}
@@ -221,7 +221,7 @@ func collapseDuplicateSpellCasts(input dnd.SpellList, documentIndex source.Docum
 		}
 	}
 
-	warnings := make([]contracts.Warning, 0)
+	warnings := make([]diagnostics.Finding, 0)
 	for _, group := range groups {
 		if len(group.removed) == 0 {
 			continue
@@ -264,7 +264,7 @@ func writeKeyInt(builder *strings.Builder, value int) {
 	builder.WriteByte(';')
 }
 
-func duplicateWarning(retainedIndex int, removed []int) contracts.Warning {
+func duplicateWarning(retainedIndex int, removed []int) diagnostics.Finding {
 	const maxDisplayedIndices = 20
 	displayed := removed
 	if len(displayed) > maxDisplayedIndices {
@@ -279,7 +279,7 @@ func duplicateWarning(retainedIndex int, removed []int) contracts.Warning {
 	if omitted := len(removed) - len(displayed); omitted > 0 {
 		message += fmt.Sprintf("; %d additional removed input indices omitted", omitted)
 	}
-	return contracts.Warning{
+	return diagnostics.Finding{
 		Scope:      spellCastScope(retainedIndex),
 		ReasonCode: ReasonCodeDuplicateSpellCastCollapsed,
 		Message:    message,

internal/modules/dnd/normalize/spells/normalizer_test.go

@@ -12,7 +12,6 @@ import (
 	"gitea.maximumdirect.net/eric/notarius/internal/framework/contracts"
 	"gitea.maximumdirect.net/eric/notarius/internal/framework/pipeline"
 	"gitea.maximumdirect.net/eric/notarius/internal/modules/dnd"
-	"gitea.maximumdirect.net/eric/notarius/internal/modules/dnd/shared/diagnostics"
 	spellcatalog "gitea.maximumdirect.net/eric/notarius/internal/modules/dnd/spells/catalog"
 )
 
@@ -151,13 +150,13 @@ func TestNormalizeCanonicalizesNamesAndReportsUnresolvedNames(t *testing.T) {
 	}
 	canonicalized := diagnosticByReason(result.Diagnostics, ReasonCodeSpellNameCanonicalized)
 	unresolved := diagnosticByReason(result.Diagnostics, ReasonCodeSpellNameUnresolved)
-	if len(result.Warnings) != 0 || canonicalized == nil || canonicalized.Disposition != contracts.DiagnosticDispositionObservation || canonicalized.OccurrenceCount != 3 || unresolved == nil || unresolved.Disposition != contracts.DiagnosticDispositionAdvisory || unresolved.OccurrenceCount != 1 || unresolved.Samples[0].Scope != "spell_casts[3]" || strings.Contains(unresolved.Samples[0].Message, "Mystery\nSpell") || !strings.Contains(unresolved.Samples[0].Message, `Mystery\nSpell\tName`) {
+	if canonicalized == nil || canonicalized.Disposition != contracts.DiagnosticDispositionObservation || canonicalized.OccurrenceCount != 3 || unresolved == nil || unresolved.Disposition != contracts.DiagnosticDispositionAdvisory || unresolved.OccurrenceCount != 1 || unresolved.Samples[0].Scope != "spell_casts[3]" || strings.Contains(unresolved.Samples[0].Message, "Mystery\nSpell") || !strings.Contains(unresolved.Samples[0].Message, `Mystery\nSpell\tName`) {
 		t.Fatalf("diagnostics = %#v, want grouped canonicalization and unresolved-quality diagnostics", result.Diagnostics)
 	}
 }
 
 func TestNormalizeLimitsWarningsWithoutChangingSpellValues(t *testing.T) {
-	input := dnd.SpellList{SpellCasts: make([]dnd.SpellCast, diagnostics.MaxWarnings+1)}
+	input := dnd.SpellList{SpellCasts: make([]dnd.SpellCast, contracts.MaxDiagnosticSamples+1)}
 	for index := range input.SpellCasts {
 		input.SpellCasts[index].Spell = fmt.Sprintf("Unknown Spell %d", index)
 	}
@@ -168,7 +167,7 @@ func TestNormalizeLimitsWarningsWithoutChangingSpellValues(t *testing.T) {
 	if !reflect.DeepEqual(result.Value, input) {
 		t.Fatalf("normalized value = %#v, want unresolved spell values preserved", result.Value)
 	}
-	if len(result.Warnings) != 0 || len(result.Diagnostics) != 1 || result.Diagnostics[0].ReasonCode != ReasonCodeSpellNameUnresolved || result.Diagnostics[0].Disposition != contracts.DiagnosticDispositionAdvisory || result.Diagnostics[0].OccurrenceCount != len(input.SpellCasts) || len(result.Diagnostics[0].Samples) != contracts.MaxDiagnosticSamples {
+	if len(result.Diagnostics) != 1 || result.Diagnostics[0].ReasonCode != ReasonCodeSpellNameUnresolved || result.Diagnostics[0].Disposition != contracts.DiagnosticDispositionAdvisory || result.Diagnostics[0].OccurrenceCount != len(input.SpellCasts) || len(result.Diagnostics[0].Samples) != contracts.MaxDiagnosticSamples {
 		t.Fatalf("diagnostics = %#v", result.Diagnostics)
 	}
 }
@@ -350,7 +349,7 @@ func TestNormalizeCollapsesDuplicateGroupsAfterCanonicalization(t *testing.T) {
 	canonicalized := diagnosticByReason(result.Diagnostics, ReasonCodeSpellNameCanonicalized)
 	refsNormalized := diagnosticByReason(result.Diagnostics, ReasonCodeSourceReferencesNormalized)
 	collapsed := diagnosticByReason(result.Diagnostics, ReasonCodeDuplicateSpellCastCollapsed)
-	if len(result.Warnings) != 0 || canonicalized == nil || canonicalized.OccurrenceCount != 3 || refsNormalized == nil || refsNormalized.OccurrenceCount != 1 || collapsed == nil || collapsed.OccurrenceCount != 2 || !strings.Contains(collapsed.Samples[0].Message, "retained input index 0") {
+	if canonicalized == nil || canonicalized.OccurrenceCount != 3 || refsNormalized == nil || refsNormalized.OccurrenceCount != 1 || collapsed == nil || collapsed.OccurrenceCount != 2 || !strings.Contains(collapsed.Samples[0].Message, "retained input index 0") {
 		t.Fatalf("diagnostics = %#v, want grouped normalization observations", result.Diagnostics)
 	}
 }
@@ -380,10 +379,8 @@ func TestNormalizeKeepsDistinctAndIneligibleCastsSeparate(t *testing.T) {
 			if len(result.Value.SpellCasts) != 2 {
 				t.Fatalf("normalized casts = %#v, want both casts retained", result.Value.SpellCasts)
 			}
-			for _, warning := range result.Warnings {
+			if diagnosticByReason(result.Diagnostics, ReasonCodeDuplicateSpellCastCollapsed) != nil {
-				if warning.ReasonCode == ReasonCodeDuplicateSpellCastCollapsed {
+				t.Fatalf("diagnostics = %#v, want no duplicate collapse", result.Diagnostics)
-					t.Fatalf("warnings = %#v, want no duplicate collapse", result.Warnings)
-				}
 			}
 		})
 	}
@@ -404,10 +401,8 @@ func TestNormalizeDoesNotCollapseAdjacentOrOverlappingEvidence(t *testing.T) {
 	if len(result.Value.SpellCasts) != len(input.SpellCasts) {
 		t.Fatalf("normalized casts = %#v, want adjacent and overlapping evidence retained", result.Value.SpellCasts)
 	}
-	for _, warning := range result.Warnings {
+	if diagnosticByReason(result.Diagnostics, ReasonCodeDuplicateSpellCastCollapsed) != nil {
-		if warning.ReasonCode == ReasonCodeDuplicateSpellCastCollapsed {
+		t.Fatalf("diagnostics = %#v, want no duplicate collapse", result.Diagnostics)
-			t.Fatalf("warnings = %#v, want no duplicate collapse", result.Warnings)
-		}
 	}
 }
 
@@ -448,8 +443,8 @@ func TestNormalizeIsIdempotentForAlreadyNormalizedInput(t *testing.T) {
 	if err != nil {
 		t.Fatalf("second Normalize() error = %v, want nil", err)
 	}
-	if !reflect.DeepEqual(second.Value, first.Value) || len(first.Warnings) != 0 || len(second.Warnings) != 0 {
+	if !reflect.DeepEqual(second.Value, first.Value) {
-		t.Fatalf("first = %#v/%#v, second = %#v/%#v, want identical artifacts without mutation warnings", first.Value, first.Warnings, second.Value, second.Warnings)
+		t.Fatalf("first = %#v, second = %#v, want identical artifacts", first.Value, second.Value)
 	}
 }
 

internal/modules/dnd/shared/diagnostics/diagnostics.go

@@ -1,5 +1,5 @@
 // Package diagnostics provides bounded, safe text for deterministic D&D
-// decisions and warnings.
+// decisions and findings.
 package diagnostics
 
 import (
@@ -13,15 +13,22 @@ import (
 
 const (
 	MaxIssues         = 20
-	MaxWarnings       = 20
 	MaxDisplayedRunes = 128
 	MaxMessageBytes   = 4096
 )
 
+// Finding is a local, ungrouped D&D diagnostic fact. Producers convert these
+// to bounded framework diagnostics at their result boundary.
+type Finding struct {
+	Scope      string
+	ReasonCode string
+	Message    string
+}
+
 // DataQualityResult converts accepted source-quality findings into bounded,
 // locally grouped advisories. These findings do not indicate process
 // degradation.
-func DataQualityResult(findings []contracts.Warning) (contracts.ValidationResult, error) {
+func DataQualityResult(findings []Finding) (contracts.ValidationResult, error) {
 	diagnostics, err := Collect(findings, contracts.DiagnosticDispositionAdvisory, contracts.DiagnosticCategoryDataQuality)
 	if err != nil {
 		return contracts.ValidationResult{}, err
@@ -31,7 +38,7 @@ func DataQualityResult(findings []contracts.Warning) (contracts.ValidationResult
 
 // Collect converts individual deterministic findings into bounded,
 // occurrence-grouped producer diagnostics with one consistent classification.
-func Collect(findings []contracts.Warning, disposition contracts.DiagnosticDisposition, category contracts.DiagnosticCategory) ([]contracts.ProducerDiagnostic, error) {
+func Collect(findings []Finding, disposition contracts.DiagnosticDisposition, category contracts.DiagnosticCategory) ([]contracts.ProducerDiagnostic, error) {
 	collector := frameworkdiagnostics.NewCollector()
 	for _, finding := range findings {
 		if err := collector.Add(contracts.ProducerDiagnostic{
@@ -49,13 +56,13 @@ func Collect(findings []contracts.Warning, disposition contracts.DiagnosticDispo
 
 // NormalizationDiagnostics classifies deterministic normalization findings as
 // observations, except for explicitly identified unresolved-quality findings.
-func NormalizationDiagnostics(findings []contracts.Warning, advisoryReasonCodes ...string) ([]contracts.ProducerDiagnostic, error) {
+func NormalizationDiagnostics(findings []Finding, advisoryReasonCodes ...string) ([]contracts.ProducerDiagnostic, error) {
 	advisoryReasons := make(map[string]struct{}, len(advisoryReasonCodes))
 	for _, reasonCode := range advisoryReasonCodes {
 		advisoryReasons[reasonCode] = struct{}{}
 	}
-	observations := make([]contracts.Warning, 0, len(findings))
+	observations := make([]Finding, 0, len(findings))
-	advisories := make([]contracts.Warning, 0)
+	advisories := make([]Finding, 0)
 	for _, finding := range findings {
 		if _, advisory := advisoryReasons[finding.ReasonCode]; advisory {
 			advisories = append(advisories, finding)
@@ -97,28 +104,6 @@ func Aggregate(prefix string, issues []string) string {
 	return aggregateMessage(prefix, displayed, len(issues)-len(displayed))
 }
 
-// LimitWarnings returns at most MaxWarnings warnings, reserving the final
-// position for a deterministic omission summary when truncation is required.
-func LimitWarnings(warnings []contracts.Warning, scope, reasonCode string) []contracts.Warning {
-	if warnings == nil {
-		return nil
-	}
-	if len(warnings) <= MaxWarnings {
-		bounded := make([]contracts.Warning, len(warnings))
-		copy(bounded, warnings)
-		return bounded
-	}
-	displayed := MaxWarnings - 1
-	bounded := make([]contracts.Warning, displayed, MaxWarnings)
-	copy(bounded, warnings[:displayed])
-	bounded = append(bounded, contracts.Warning{
-		Scope:      scope,
-		ReasonCode: reasonCode,
-		Message:    fmt.Sprintf("%d additional warning(s) omitted", len(warnings)-displayed),
-	})
-	return bounded
-}
-
 func aggregateMessage(prefix string, issues []string, omitted int) string {
 	message := prefix + ": " + strings.Join(issues, ", ")
 	if omitted > 0 {

internal/modules/dnd/shared/diagnostics/diagnostics_test.go

@@ -2,7 +2,6 @@ package diagnostics
 
 import (
 	"fmt"
-	"reflect"
 	"strings"
 	"testing"
 	"unicode/utf8"
@@ -30,30 +29,8 @@ func TestAggregateEnforcesByteBudgetAndReportsOmissions(t *testing.T) {
 	}
 }
 
-func TestLimitWarningsBoundsOutputAndReportsOmissions(t *testing.T) {
-	warnings := make([]contracts.Warning, MaxWarnings+3)
-	for index := range warnings {
-		warnings[index] = contracts.Warning{ReasonCode: fmt.Sprintf("warning-%d", index)}
-	}
-	before := append([]contracts.Warning(nil), warnings...)
-
-	got := LimitWarnings(warnings, "records", "warnings_omitted")
-	if len(got) != MaxWarnings {
-		t.Fatalf("LimitWarnings() count = %d, want %d", len(got), MaxWarnings)
-	}
-	summary := got[len(got)-1]
-	wantOmitted := len(warnings) - (MaxWarnings - 1)
-	if summary.Scope != "records" || summary.ReasonCode != "warnings_omitted" ||
-		summary.Message != fmt.Sprintf("%d additional warning(s) omitted", wantOmitted) {
-		t.Fatalf("summary = %#v", summary)
-	}
-	if !reflect.DeepEqual(warnings, before) {
-		t.Fatal("LimitWarnings() mutated its input")
-	}
-}
-
 func TestDataQualityResultGroupsFindingsWithoutWarnings(t *testing.T) {
-	result, err := DataQualityResult([]contracts.Warning{
+	result, err := DataQualityResult([]Finding{
 		{Scope: "records[0]", ReasonCode: "not_near_source", Message: "first"},
 		{Scope: "records[0]", ReasonCode: "not_near_source", Message: "first"},
 		{Scope: "records[1]", ReasonCode: "not_near_source", Message: "second"},
@@ -61,7 +38,7 @@ func TestDataQualityResultGroupsFindingsWithoutWarnings(t *testing.T) {
 	if err != nil {
 		t.Fatal(err)
 	}
-	if !result.Approved || len(result.Warnings) != 0 || len(result.Diagnostics) != 1 {
+	if !result.Approved || len(result.Diagnostics) != 1 {
 		t.Fatalf("result = %#v", result)
 	}
 	diagnostic := result.Diagnostics[0]
@@ -71,9 +48,9 @@ func TestDataQualityResultGroupsFindingsWithoutWarnings(t *testing.T) {
 }
 
 func TestCollectGroupsNormalizationFindingsWithBoundedSamples(t *testing.T) {
-	findings := make([]contracts.Warning, 5)
+	findings := make([]Finding, 5)
 	for index := range findings {
-		findings[index] = contracts.Warning{
+		findings[index] = Finding{
 			Scope:      fmt.Sprintf("records[%d]", index),
 			ReasonCode: "record_normalized",
 			Message:    fmt.Sprintf("record %d normalized", index),
@@ -94,7 +71,7 @@ func TestCollectGroupsNormalizationFindingsWithBoundedSamples(t *testing.T) {
 }
 
 func TestNormalizationDiagnosticsCombinesQualityAndCleanupWithoutWarnings(t *testing.T) {
-	groups, err := NormalizationDiagnostics([]contracts.Warning{
+	groups, err := NormalizationDiagnostics([]Finding{
 		{Scope: "spell_casts[0]", ReasonCode: "spell_name_canonicalized", Message: "canonicalized spell name"},
 		{Scope: "spell_casts[1]", ReasonCode: "spell_name_unresolved", Message: "spell was not in the catalog"},
 	}, "spell_name_unresolved")

internal/modules/dnd/validate/combatturns/invariants/validator_test.go

@@ -15,7 +15,7 @@ import (
 
 func TestValidatorApprovesNormalizedCombatTurns(t *testing.T) {
 	result, err := New(Options{}).Validate(context.Background(), contracts.TypedValidationRequest[dnd.CombatTurnList]{Source: invariantDocument(), Value: normalizedList()})
-	if err != nil || !result.Approved || len(result.Warnings) != 0 {
+	if err != nil || !result.Approved {
 		t.Fatalf("Validate() = %#v, %v; want approval without warnings", result, err)
 	}
 }

internal/modules/dnd/validate/combatturns/shape/validator_test.go

@@ -14,7 +14,7 @@ import (
 
 func TestValidatorApprovesWellFormedCombatTurnList(t *testing.T) {
 	result, err := New(Options{}).Validate(context.Background(), contracts.TypedValidationRequest[dnd.CombatTurnList]{Value: validCombatTurnList()})
-	if err != nil || !result.Approved || len(result.Warnings) != 0 {
+	if err != nil || !result.Approved {
 		t.Fatalf("Validate() = %#v, %v; want approval without warnings", result, err)
 	}
 }

internal/modules/dnd/validate/combatturns/source_refs/validator_test.go

@@ -85,7 +85,7 @@ func TestValidatorEnforcesCurrentChunkEvidenceDuringExtraction(t *testing.T) {
 func TestValidatorDefersMalformedShape(t *testing.T) {
 	value := dnd.CombatTurnList{CombatTurns: []dnd.CombatTurn{{Actor: "Aria"}}}
 	result, err := New(Options{}).Validate(context.Background(), contracts.TypedValidationRequest[dnd.CombatTurnList]{Source: validDocument(), Value: value})
-	if err != nil || !result.Approved || len(result.Warnings) != 0 {
+	if err != nil || !result.Approved {
 		t.Fatalf("shape deferral = %#v, %v; want approval without source warning", result, err)
 	}
 }

internal/modules/dnd/validate/combatturns/source_relatedness/validator.go

@@ -50,13 +50,13 @@ func (v *Validator) Validate(_ context.Context, req contracts.TypedValidationReq
 		}
 		citedTexts[turnIndex] = citedText
 	}
-	warnings := make([]contracts.Warning, 0)
+	warnings := make([]diagnostics.Finding, 0)
 	for turnIndex, turn := range req.Value.CombatTurns {
 		citedText := citedTexts[turnIndex]
 		if actorAppearsInCitedText(citedText, turn.Actor) {
 			continue
 		}
-		warnings = append(warnings, contracts.Warning{
+		warnings = append(warnings, diagnostics.Finding{
 			Scope:      fmt.Sprintf("combat_turns[%d]", turnIndex),
 			ReasonCode: ReasonCode,
 			Message: diagnostics.Aggregate("combat turn not near source", []string{

internal/modules/dnd/validate/combatturns/source_relatedness/validator_test.go

@@ -36,7 +36,7 @@ func TestValidatorWarnsOncePerTurnForUnrelatedActor(t *testing.T) {
 		SourceRefs: []source.SourceRef{{SourceID: "session", StartUnitID: 1, EndUnitID: 1}, {SourceID: "session", StartUnitID: 1, EndUnitID: 1}},
 	}}}
 	result, err := New(Options{}).Validate(context.Background(), contracts.TypedValidationRequest[dnd.CombatTurnList]{Source: relatednessDocument(), Value: value})
-	if err != nil || !result.Approved || len(result.Warnings) != 0 || len(result.Diagnostics) != 1 {
+	if err != nil || !result.Approved || len(result.Diagnostics) != 1 {
 		t.Fatalf("Validate() = %#v, %v; want one advisory for the turn", result, err)
 	}
 	diagnostic := result.Diagnostics[0]
@@ -62,7 +62,7 @@ func TestValidatorLimitsUnrelatedActorWarnings(t *testing.T) {
 	if err != nil || !result.Approved {
 		t.Fatalf("Validate() = %#v, %v", result, err)
 	}
-	if len(result.Warnings) != 0 || len(result.Diagnostics) != 1 || result.Diagnostics[0].OccurrenceCount != len(turns) || len(result.Diagnostics[0].Samples) != contracts.MaxDiagnosticSamples || result.Diagnostics[0].OmittedSampleCount != len(turns)-contracts.MaxDiagnosticSamples {
+	if len(result.Diagnostics) != 1 || result.Diagnostics[0].OccurrenceCount != len(turns) || len(result.Diagnostics[0].Samples) != contracts.MaxDiagnosticSamples || result.Diagnostics[0].OmittedSampleCount != len(turns)-contracts.MaxDiagnosticSamples {
 		t.Fatalf("diagnostics = %#v", result.Diagnostics)
 	}
 }

internal/modules/dnd/validate/correction_contract_test.go

@@ -35,7 +35,6 @@ func TestRepresentativeProductionValidatorResultsSatisfyCorrectionContract(t *te
 		name                string
 		validate            func() (contracts.ValidationResult, error)
 		wantApproved        bool
-		wantWarningCount    int
 		wantDiagnosticCount int
 		wantDisposition     contracts.DiagnosticDisposition
 	}{
@@ -123,9 +122,6 @@ func TestRepresentativeProductionValidatorResultsSatisfyCorrectionContract(t *te
 			if result.Approved != test.wantApproved {
 				t.Fatalf("Validate() approved = %t, want %t: %#v", result.Approved, test.wantApproved, result)
 			}
-			if len(result.Warnings) != test.wantWarningCount {
-				t.Fatalf("Validate() warnings = %d, want %d: %#v", len(result.Warnings), test.wantWarningCount, result)
-			}
 			if len(result.Diagnostics) != test.wantDiagnosticCount {
 				t.Fatalf("Validate() diagnostics = %d, want %d: %#v", len(result.Diagnostics), test.wantDiagnosticCount, result)
 			}

internal/modules/dnd/validate/enemyevents/shape/validator_test.go

@@ -15,7 +15,7 @@ import (
 func TestValidatorAcceptsEmptyAndWellFormedEventLists(t *testing.T) {
 	for _, value := range []dnd.EnemyEventList{{Events: []dnd.EnemyEvent{}}, validEventList()} {
 		result, err := New(Options{}).Validate(context.Background(), contracts.TypedValidationRequest[dnd.EnemyEventList]{Value: value})
-		if err != nil || !result.Approved || len(result.Warnings) != 0 {
+		if err != nil || !result.Approved {
 			t.Fatalf("Validate() = %#v, %v", result, err)
 		}
 	}

internal/modules/dnd/validate/enemyevents/source_relatedness/validator.go

@@ -42,13 +42,13 @@ func (v *Validator) Validate(_ context.Context, req contracts.TypedValidationReq
 	if err != nil {
 		return contracts.ValidationResult{Approved: true}, nil
 	}
-	warnings := make([]contracts.Warning, 0)
+	warnings := make([]diagnostics.Finding, 0)
 	for eventIndex, event := range req.Value.Events {
 		citedText, err := resolver.CitedText(event.SourceRefs)
 		if err != nil || shared.ContainsTokenSequence(citedText, event.Name) {
 			continue
 		}
-		warnings = append(warnings, contracts.Warning{
+		warnings = append(warnings, diagnostics.Finding{
 			Scope:      fmt.Sprintf("events[%d]", eventIndex),
 			ReasonCode: ReasonCode,
 			Message: diagnostics.Aggregate("enemy event subject not near source", []string{

internal/modules/dnd/validate/enemyevents/source_relatedness/validator_test.go

@@ -14,7 +14,7 @@ func TestValidatorUsesOnlyCitedTranscriptEvidence(t *testing.T) {
 	value := validEventList()
 	references := contracts.ReferenceSet{Slots: map[string]contracts.ResolvedReferenceSlot{"npc_registry": {Items: []contracts.ReferenceItem{{Content: []byte("Ashfang")}}}}}
 	result, err := New(Options{}).Validate(context.Background(), contracts.TypedValidationRequest[dnd.EnemyEventList]{Source: document("The party waits."), References: references, Value: value})
-	if err != nil || !result.Approved || len(result.Warnings) != 0 || len(result.Diagnostics) != 1 || result.Diagnostics[0].ReasonCode != ReasonCode || result.Diagnostics[0].Disposition != contracts.DiagnosticDispositionAdvisory {
+	if err != nil || !result.Approved || len(result.Diagnostics) != 1 || result.Diagnostics[0].ReasonCode != ReasonCode || result.Diagnostics[0].Disposition != contracts.DiagnosticDispositionAdvisory {
 		t.Fatalf("Validate() = %#v, %v", result, err)
 	}
 }
@@ -39,7 +39,7 @@ func TestValidatorDefersMalformedValuesAndBoundsWarnings(t *testing.T) {
 		value.Events[index] = dnd.EnemyEvent{Name: "Missing", Kind: dnd.EnemyEventKindEngaged, SourceRefs: []source.SourceRef{{SourceID: "session", StartUnitID: 1, EndUnitID: 1}}}
 	}
 	result, err = New(Options{}).Validate(context.Background(), contracts.TypedValidationRequest[dnd.EnemyEventList]{Source: document("none"), Value: value})
-	if err != nil || !result.Approved || len(result.Warnings) != 0 || len(result.Diagnostics) != 1 || result.Diagnostics[0].OccurrenceCount != len(value.Events) || len(result.Diagnostics[0].Samples) != contracts.MaxDiagnosticSamples {
+	if err != nil || !result.Approved || len(result.Diagnostics) != 1 || result.Diagnostics[0].OccurrenceCount != len(value.Events) || len(result.Diagnostics[0].Samples) != contracts.MaxDiagnosticSamples {
 		t.Fatalf("bounded advisories = %#v, %v", result, err)
 	}
 	registry := pipeline.NewValidatorRegistry()

internal/modules/dnd/validate/itemoccurrences/source_relatedness/validator.go

@@ -45,13 +45,13 @@ func (v *Validator) Validate(_ context.Context, req contracts.TypedValidationReq
 		return contracts.ValidationResult{Approved: true}, nil
 	}
 
-	warnings := make([]contracts.Warning, 0)
+	warnings := make([]diagnostics.Finding, 0)
 	for index, occurrence := range req.Value.Occurrences {
 		citedText, err := resolver.CitedText(occurrence.SourceRefs)
 		if err != nil || shared.ContainsTokenSequence(citedText, occurrence.Name) {
 			continue
 		}
-		warnings = append(warnings, contracts.Warning{
+		warnings = append(warnings, diagnostics.Finding{
 			Scope:      fmt.Sprintf("occurrences[%d]", index),
 			ReasonCode: ReasonCode,
 			Message:    fmt.Sprintf("item occurrence name %s was not found in cited source text", diagnostics.Quote(occurrence.Name)),

internal/modules/dnd/validate/itemoccurrences/source_relatedness/validator_test.go

@@ -25,7 +25,7 @@ func TestValidatorMatchesTokenSequencesAcrossRanges(t *testing.T) {
 		"glossary": {Items: []contracts.ReferenceItem{{Content: []byte("missing-item")}}},
 	}}
 	result, err := New(Options{}).Validate(context.Background(), contracts.TypedValidationRequest[dnd.ItemOccurrenceList]{Source: doc, References: references, Value: value})
-	if err != nil || !result.Approved || len(result.Warnings) != 0 || len(result.Diagnostics) != 1 {
+	if err != nil || !result.Approved || len(result.Diagnostics) != 1 {
 		t.Fatalf("Validate() = %#v, %v", result, err)
 	}
 	if diagnostic := result.Diagnostics[0]; diagnostic.Samples[0].Scope != "occurrences[1]" || diagnostic.ReasonCode != ReasonCode || !strings.Contains(diagnostic.Samples[0].Message, "missing-item") {
@@ -56,7 +56,7 @@ func TestValidatorBoundsWarningsAndRegistersPolicy(t *testing.T) {
 		Source: &source.SourceDocument{ID: "session", Units: []source.SourceUnit{{ID: 1, Text: "nothing useful"}}},
 		Value:  dnd.ItemOccurrenceList{Occurrences: occurrences},
 	})
-	if err != nil || !result.Approved || len(result.Warnings) != 0 || len(result.Diagnostics) != 1 || result.Diagnostics[0].OccurrenceCount != count || len(result.Diagnostics[0].Samples) != contracts.MaxDiagnosticSamples {
+	if err != nil || !result.Approved || len(result.Diagnostics) != 1 || result.Diagnostics[0].OccurrenceCount != count || len(result.Diagnostics[0].Samples) != contracts.MaxDiagnosticSamples {
 		t.Fatalf("Validate() = %#v, %v", result, err)
 	}
 	if got := New(Options{}).CheckpointFingerprints(); !reflect.DeepEqual(got, []pipeline.CheckpointFingerprint{{Name: "policy", Value: policy}}) {

internal/modules/dnd/validate/itemregistry/source_relatedness/validator.go

@@ -50,12 +50,12 @@ func (v *Validator) Validate(_ context.Context, req contracts.TypedValidationReq
 		}
 		citedTexts[itemIndex] = citedText
 	}
-	warnings := make([]contracts.Warning, 0)
+	warnings := make([]diagnostics.Finding, 0)
 	for itemIndex, item := range req.Value.Items {
 		if shared.ContainsTokenSequence(citedTexts[itemIndex], item.Name) {
 			continue
 		}
-		warnings = append(warnings, contracts.Warning{
+		warnings = append(warnings, diagnostics.Finding{
 			Scope: fmt.Sprintf("items[%d]", itemIndex), ReasonCode: ReasonCode,
 			Message: fmt.Sprintf("Item %s was not found in cited source text", diagnostics.Quote(item.Name)),
 		})

internal/modules/dnd/validate/itemregistry/source_relatedness/validator_test.go

@@ -21,7 +21,7 @@ func TestValidatorUsesOnlyCitedTranscriptText(t *testing.T) {
 	value.Items[0].Name = "Glossary Relic"
 	before := value
 	result, err = New(Options{}).Validate(context.Background(), contracts.TypedValidationRequest[dnd.ItemRegistry]{Source: doc, References: contracts.ReferenceSet{Slots: map[string]contracts.ResolvedReferenceSlot{"glossary": {Items: []contracts.ReferenceItem{{Content: []byte("Glossary Relic")}}}}}, Value: value})
-	if err != nil || !result.Approved || len(result.Warnings) != 0 || len(result.Diagnostics) != 1 || result.Diagnostics[0].ReasonCode != ReasonCode || !reflect.DeepEqual(value, before) {
+	if err != nil || !result.Approved || len(result.Diagnostics) != 1 || result.Diagnostics[0].ReasonCode != ReasonCode || !reflect.DeepEqual(value, before) {
 		t.Fatalf("reference-only match = %#v, %v; want advisory warning", result, err)
 	}
 }
@@ -32,7 +32,7 @@ func TestValidatorBoundsWarningsAndRegisters(t *testing.T) {
 		items[index] = dnd.Item{ID: "item", Name: "Missing", SourceRefs: []source.SourceRef{{SourceID: "session", StartUnitID: 1, EndUnitID: 1}}}
 	}
 	result, err := New(Options{}).Validate(context.Background(), contracts.TypedValidationRequest[dnd.ItemRegistry]{Source: &source.SourceDocument{ID: "session", Units: []source.SourceUnit{{ID: 1, Text: "Nothing here."}}}, Value: dnd.ItemRegistry{Items: items}})
-	if err != nil || !result.Approved || len(result.Warnings) != 0 || len(result.Diagnostics) != 1 || result.Diagnostics[0].OccurrenceCount != len(items) || len(result.Diagnostics[0].Samples) != contracts.MaxDiagnosticSamples {
+	if err != nil || !result.Approved || len(result.Diagnostics) != 1 || result.Diagnostics[0].OccurrenceCount != len(items) || len(result.Diagnostics[0].Samples) != contracts.MaxDiagnosticSamples {
 		t.Fatalf("bounded advisories = %#v, %v", result, err)
 	}
 	registry := pipeline.NewValidatorRegistry()

internal/modules/dnd/validate/locationoccurrences/source_relatedness/validator.go

@@ -50,12 +50,12 @@ func (v *Validator) Validate(_ context.Context, req contracts.TypedValidationReq
 		}
 		citedTexts[index] = citedText
 	}
-	warnings := make([]contracts.Warning, 0)
+	warnings := make([]diagnostics.Finding, 0)
 	for index, occurrence := range req.Value.Occurrences {
 		if shared.ContainsTokenSequence(citedTexts[index], occurrence.Name) {
 			continue
 		}
-		warnings = append(warnings, contracts.Warning{Scope: fmt.Sprintf("occurrences[%d]", index), ReasonCode: ReasonCode, Message: fmt.Sprintf("Location occurrence name %s was not found in cited source text", diagnostics.Quote(occurrence.Name))})
+		warnings = append(warnings, diagnostics.Finding{Scope: fmt.Sprintf("occurrences[%d]", index), ReasonCode: ReasonCode, Message: fmt.Sprintf("Location occurrence name %s was not found in cited source text", diagnostics.Quote(occurrence.Name))})
 	}
 	return diagnostics.DataQualityResult(warnings)
 }

internal/modules/dnd/validate/locationoccurrences/source_relatedness/validator_test.go

@@ -23,7 +23,7 @@ func TestValidatorUsesOnlyCitedTranscriptEvidence(t *testing.T) {
 	before := cloneList(value)
 	references := contracts.ReferenceSet{Slots: map[string]contracts.ResolvedReferenceSlot{"glossary": {Items: []contracts.ReferenceItem{{Content: []byte("Glossary Keep")}}}}}
 	result, err = New(Options{}).Validate(context.Background(), request(doc, value, references))
-	if err != nil || !result.Approved || len(result.Warnings) != 0 || len(result.Diagnostics) != 1 || result.Diagnostics[0].ReasonCode != ReasonCode || !strings.Contains(result.Diagnostics[0].Samples[0].Message, "Glossary Keep") || !reflect.DeepEqual(value, before) {
+	if err != nil || !result.Approved || len(result.Diagnostics) != 1 || result.Diagnostics[0].ReasonCode != ReasonCode || !strings.Contains(result.Diagnostics[0].Samples[0].Message, "Glossary Keep") || !reflect.DeepEqual(value, before) {
 		t.Fatalf("reference-only match = %#v, %v", result, err)
 	}
 }
@@ -41,7 +41,7 @@ func TestValidatorDefersUnreadableEvidenceAndBoundsWarnings(t *testing.T) {
 		occurrences[index] = occurrenceList("Missing").Occurrences[0]
 	}
 	result, err = New(Options{}).Validate(context.Background(), request(document(), dnd.LocationOccurrenceList{Occurrences: occurrences}, contracts.ReferenceSet{}))
-	if err != nil || !result.Approved || len(result.Warnings) != 0 || len(result.Diagnostics) != 1 || result.Diagnostics[0].OccurrenceCount != len(occurrences) || len(result.Diagnostics[0].Samples) != contracts.MaxDiagnosticSamples {
+	if err != nil || !result.Approved || len(result.Diagnostics) != 1 || result.Diagnostics[0].OccurrenceCount != len(occurrences) || len(result.Diagnostics[0].Samples) != contracts.MaxDiagnosticSamples {
 		t.Fatalf("bounded advisories = %#v, %v", result, err)
 	}
 }

internal/modules/dnd/validate/locationregistry/source_relatedness/validator.go

@@ -50,12 +50,12 @@ func (v *Validator) Validate(_ context.Context, req contracts.TypedValidationReq
 		}
 		citedTexts[locationIndex] = citedText
 	}
-	warnings := make([]contracts.Warning, 0)
+	warnings := make([]diagnostics.Finding, 0)
 	for locationIndex, location := range req.Value.Locations {
 		if shared.ContainsTokenSequence(citedTexts[locationIndex], location.Name) {
 			continue
 		}
-		warnings = append(warnings, contracts.Warning{
+		warnings = append(warnings, diagnostics.Finding{
 			Scope: fmt.Sprintf("locations[%d]", locationIndex), ReasonCode: ReasonCode,
 			Message: fmt.Sprintf("Location %s was not found in cited source text", diagnostics.Quote(location.Name)),
 		})

internal/modules/dnd/validate/locationregistry/source_relatedness/validator_test.go

@@ -23,7 +23,7 @@ func TestValidatorUsesOnlyCitedTranscriptText(t *testing.T) {
 	before := value
 	references := contracts.ReferenceSet{Slots: map[string]contracts.ResolvedReferenceSlot{"glossary": {Items: []contracts.ReferenceItem{{Content: []byte("Glossary Keep")}}}}}
 	result, err = New(Options{}).Validate(context.Background(), request(doc, value, references))
-	if err != nil || !result.Approved || len(result.Warnings) != 0 || len(result.Diagnostics) != 1 || result.Diagnostics[0].ReasonCode != ReasonCode || !strings.Contains(result.Diagnostics[0].Samples[0].Message, "Glossary Keep") || !reflect.DeepEqual(value, before) {
+	if err != nil || !result.Approved || len(result.Diagnostics) != 1 || result.Diagnostics[0].ReasonCode != ReasonCode || !strings.Contains(result.Diagnostics[0].Samples[0].Message, "Glossary Keep") || !reflect.DeepEqual(value, before) {
 		t.Fatalf("reference-only match = %#v, %v; want advisory warning", result, err)
 	}
 }
@@ -60,7 +60,7 @@ func TestValidatorBoundsWarnings(t *testing.T) {
 		locations[index] = dnd.Location{ID: "candidate", Name: "Missing", SourceRefs: []source.SourceRef{{SourceID: "session", StartUnitID: 1, EndUnitID: 1}}}
 	}
 	result, err := New(Options{}).Validate(context.Background(), request(document(), dnd.LocationRegistry{Locations: locations}, contracts.ReferenceSet{}))
-	if err != nil || !result.Approved || len(result.Warnings) != 0 || len(result.Diagnostics) != 1 || result.Diagnostics[0].OccurrenceCount != len(locations) || len(result.Diagnostics[0].Samples) != contracts.MaxDiagnosticSamples {
+	if err != nil || !result.Approved || len(result.Diagnostics) != 1 || result.Diagnostics[0].OccurrenceCount != len(locations) || len(result.Diagnostics[0].Samples) != contracts.MaxDiagnosticSamples {
 		t.Fatalf("bounded advisories = %#v, %v", result, err)
 	}
 }

internal/modules/dnd/validate/npcoccurrences/source_relatedness/validator.go

@@ -50,12 +50,12 @@ func (v *Validator) Validate(_ context.Context, req contracts.TypedValidationReq
 		}
 		citedTexts[index] = citedText
 	}
-	warnings := make([]contracts.Warning, 0)
+	warnings := make([]diagnostics.Finding, 0)
 	for index, occurrence := range req.Value.Occurrences {
 		if shared.ContainsTokenSequence(citedTexts[index], occurrence.Name) {
 			continue
 		}
-		warnings = append(warnings, contracts.Warning{
+		warnings = append(warnings, diagnostics.Finding{
 			Scope:      fmt.Sprintf("occurrences[%d]", index),
 			ReasonCode: ReasonCode,
 			Message:    fmt.Sprintf("NPC occurrence name %s was not found in cited source text", diagnostics.Quote(occurrence.Name)),

internal/modules/dnd/validate/npcoccurrences/source_relatedness/validator_test.go

@@ -20,7 +20,7 @@ func TestValidatorUsesOnlyCurrentTranscriptAndWarnsOncePerOccurrence(t *testing.
 	doc := &source.SourceDocument{ID: "session", Units: []source.SourceUnit{{ID: 1, Text: "O’Rin Thorn speaks."}, {ID: 2, Text: "The party waits."}}}
 	references := contracts.ReferenceSet{Slots: map[string]contracts.ResolvedReferenceSlot{"glossary": {Items: []contracts.ReferenceItem{{Content: []byte("Missing NPC")}}}}}
 	result, err := New(Options{}).Validate(context.Background(), contracts.TypedValidationRequest[dnd.NPCOccurrenceList]{Source: doc, References: references, Value: value})
-	if err != nil || !result.Approved || len(result.Warnings) != 0 || len(result.Diagnostics) != 1 {
+	if err != nil || !result.Approved || len(result.Diagnostics) != 1 {
 		t.Fatalf("Validate() = %#v, %v", result, err)
 	}
 	if diagnostic := result.Diagnostics[0]; diagnostic.Samples[0].Scope != "occurrences[1]" || diagnostic.ReasonCode != ReasonCode || !strings.Contains(diagnostic.Samples[0].Message, `Missing\nNPC`) {
@@ -68,7 +68,7 @@ func TestValidatorBoundsWarnings(t *testing.T) {
 	if err != nil || !result.Approved {
 		t.Fatalf("Validate() = %#v, %v", result, err)
 	}
-	if len(result.Warnings) != 0 || len(result.Diagnostics) != 1 || result.Diagnostics[0].OccurrenceCount != count || len(result.Diagnostics[0].Samples) != contracts.MaxDiagnosticSamples {
+	if len(result.Diagnostics) != 1 || result.Diagnostics[0].OccurrenceCount != count || len(result.Diagnostics[0].Samples) != contracts.MaxDiagnosticSamples {
 		t.Fatalf("diagnostics = %#v", result.Diagnostics)
 	}
 }