Report actual inference smoke test destinations

docs/internal/generation.md

@@ -44,8 +44,10 @@ clients.
 The diagnostic path uses the same private attempt and retry implementation as
 ordinary generation. It retains invocation-local transport, response,
 generation, usage, capacity-wait, and retry-delay evidence before normal
-result-discard and cancellation checks. This evidence is returned to diagnostic
-orchestration; it is not added to public `ExecutionEvent` values or ordinary
+result-discard and cancellation checks. Built-in preparation also supplies its
+frozen request URL to the evidence path before attempts begin; injected
+generation has no equivalent HTTP destination. This evidence is returned to
+diagnostic orchestration; it is not added to public `ExecutionEvent` values or ordinary
 observer accounting. The [model-client document](llm.md) describes the
 transport-observation boundary, and the root
 [`SmokeTestReport` GoDoc](../../smoke_diagnostics.go) owns report semantics.

docs/roadmap/remediation.md

@@ -1,6 +1,6 @@
 # Smoke Test Implementation Review Findings
 
-Status: one finding completed; two open. Review completed 2026-10-13.
+Status: two findings completed; one open. Review completed 2026-10-13.
 
 Reviewed implementation commits after `8fbd058` through
 `2f735aedf9b5dcc98164292db46ae1eab3e15cde`, against the
@@ -56,7 +56,7 @@ fix; `GOWORK=off go test -race ./internal/usecase .`, focused use-case vet, and
 
 ## Finding 2: Report The Actual Initial Inference Request Destination
 
-Priority: P2. Status: open.
+Priority: P2. Status: completed 2026-10-13.
 
 Locations: [`recordGenerationEvidence`](../../internal/usecase/smoke_tester.go),
 lines 240–248, and
@@ -91,6 +91,14 @@ that distinguishes the actual completion URL from the last destination. Reuse
 existing HTTP redirect tests for credential/response attribution mechanics and
 keep injected-client HTTP destination evidence unknown.
 
+Completion: built-in generation now passes the frozen prepared request URL
+through internal generation evidence. Diagnostic target/initial-attempt URLs
+use that value, while the configured base stays in effective settings and
+injected inference leaves HTTP destinations unknown. Public GoDoc and the
+internal generation document describe the corrected behavior. No-redirect,
+redirect, and injected regressions failed before the fix; race-enabled tests
+passed for the facade, model client, generation, use case, and engine packages.
+
 ## Finding 3: Initialize Zero-Dispatch Usage Consistently
 
 Priority: P3. Status: open.

internal/engine/smoke_test.go

@@ -38,6 +38,10 @@ func TestEngineSmokeTestUsesInjectedGenerationWithoutHTTPSupport(t *testing.T) {
 		report.Facts.EndpointReachable != nil || report.Target.BackendID != "rakestrawhome" {
 		t.Fatalf("injected smoke report calls=%d: %+v", calls, report)
 	}
+	if report.Target.Endpoint != "" || report.Target.EffectiveSettings.Endpoint == "" || len(report.Attempts) != 1 ||
+		report.Attempts[0].InitialEndpoint != "" || report.Attempts[0].Endpoint != "" {
+		t.Fatalf("injected report claimed HTTP destinations: %+v", report)
+	}
 
 	authentication, err := assembled.SmokeTest(context.Background(), domain.SmokeTestRequest{
 		Kind: domain.SmokeTestAuthentication, BackendID: "rakestrawhome",

internal/generation/coordinator.go

@@ -99,6 +99,9 @@ func (c *Coordinator) generate(
 	}
 
 	evidence := GenerationEvidence{}
+	if captureEvidence {
+		evidence.InitialEndpoint = prepared.InitialEndpoint()
+	}
 	var usage observation.UsageAccumulator
 	finish := func(response *domain.GenerateResponse, err error) (*domain.GenerateResponse, error, GenerationEvidence) {
 		if captureEvidence {

internal/generation/evidence.go

@@ -10,9 +10,12 @@ import (
 // GenerationEvidence contains invocation-local request evidence without raw
 // provider bodies, headers, credentials, or generated content.
 type GenerationEvidence struct {
-	Attempts    []AttemptEvidence
-	RetryDelays []time.Duration
-	Usage       domain.ObservedTokenUsage
+	// InitialEndpoint is the frozen built-in request URL, if prepared.
+	// Injected generation leaves it unknown.
+	InitialEndpoint string
+	Attempts        []AttemptEvidence
+	RetryDelays     []time.Duration
+	Usage           domain.ObservedTokenUsage
 }
 
 // AttemptEvidence describes one capacity acquisition and any dispatch it

internal/llm/openai_compatible_client.go

@@ -193,6 +193,9 @@ func resolveAPIKey(target domain.ExecutionTarget) string {
 	return apiKey
 }
 
+// InitialEndpoint returns the frozen request URL before redirects.
+func (p *PreparedGeneration) InitialEndpoint() string { return p.endpoint }
+
 // Execute dispatches one attempt. The returned response is non-nil only when
 // the successful envelope contains a usable first choice.
 func (p *PreparedGeneration) Execute(ctx context.Context) AttemptOutcome {

internal/usecase/smoke_tester.go

@@ -73,6 +73,9 @@ func (t *SmokeTester) Run(ctx context.Context, request domain.SmokeTestRequest)
 		return nil, err
 	}
 	if isInferenceSmokeTest(request.Kind) {
+		// The configured base is not evidence of an HTTP request destination.
+		// Built-in generation supplies its composed URL after preparation.
+		report.Target.Endpoint = ""
 		report.Supported = true
 		report.Applicable = boolPointer(true)
 	} else if err := t.setSupport(report, selection); err != nil {
@@ -238,13 +241,14 @@ func (t *SmokeTester) runInference(
 }
 
 func (t *SmokeTester) recordGenerationEvidence(report *domain.SmokeTestReport, evidence generation.GenerationEvidence) {
+	report.Target.Endpoint = evidence.InitialEndpoint
 	report.Usage = evidence.Usage
 	var capacityWait, requestDuration time.Duration
 	for _, attemptEvidence := range evidence.Attempts {
 		capacityWait += attemptEvidence.CapacityWait
 		attempt := domain.SmokeTestAttempt{
 			Dispatched:      attemptEvidence.Dispatched,
-			InitialEndpoint: report.Target.Endpoint,
+			InitialEndpoint: evidence.InitialEndpoint,
 			Endpoint:        attemptEvidence.HTTP.Endpoint,
 			Facts:           generationAttemptFacts(attemptEvidence),
 			Usage:           attemptEvidence.Usage,

smoke_diagnostics.go

@@ -128,7 +128,10 @@ type SmokeTestTarget struct {
 	// prompt, or backend).
 	SelectionSource string
 	// Endpoint is the initially resolved diagnostic destination. It excludes URL
-	// user information; other endpoint components and effective settings may be
+	// user information. For built-in inference it is the prepared completion URL,
+	// not the configured base. It is empty when the HTTP destination is unknown,
+	// including injected inference. The configured base remains available in
+	// EffectiveSettings. Other endpoint components and effective settings may be
 	// sensitive operator data.
 	Endpoint string
 	// EffectiveSettings is the selected target's resolved runtime configuration.
@@ -185,7 +188,8 @@ type SmokeTestAttempt struct {
 	// Dispatched distinguishes an actual attempt from an interrupted capacity
 	// acquisition.
 	Dispatched bool
-	// InitialEndpoint is the destination before redirects.
+	// InitialEndpoint is the resolved request destination before redirects;
+	// it is empty for injected inference whose HTTP destination is unknown.
 	InitialEndpoint string
 	// Endpoint is the last observed request destination for this attempt.
 	Endpoint string

smoke_integration_contract_test.go

@@ -419,8 +419,52 @@ func TestSmokeTestCrossBackendDefaultUsesEndpointOverrideThroughFacade(t *testin
 		report.Target.ProfileID != "profile-b" || report.Target.SelectionSource != "backend_default" {
 		t.Fatalf("unexpected cross-backend target: %+v", report.Target)
 	}
-	if report.Target.Endpoint != endpointOverride || report.Target.EffectiveSettings.Endpoint != endpointOverride ||
-		observedURL != endpointOverride+"/chat/completions" || len(report.Attempts) != 1 || report.Attempts[0].Endpoint != observedURL {
+	if report.Target.Endpoint != observedURL || report.Target.EffectiveSettings.Endpoint != endpointOverride ||
+		observedURL != endpointOverride+"/chat/completions" || len(report.Attempts) != 1 ||
+		report.Attempts[0].InitialEndpoint != observedURL || report.Attempts[0].Endpoint != observedURL {
 		t.Fatalf("endpoint override not used by facade: target=%+v attempt=%+v URL=%q", report.Target, report.Attempts, observedURL)
 	}
 }
+
+func TestSmokeTestInferenceEndpointsDistinguishRedirectFromRequestComposition(t *testing.T) {
+	const base = "http://initial.example/v1"
+	const redirected = "http://redirect.example/completion"
+	var observed []string
+	client := &http.Client{Transport: roundTripFunc(func(request *http.Request) (*http.Response, error) {
+		observed = append(observed, request.URL.String())
+		if len(observed) == 1 {
+			return &http.Response{
+				StatusCode: http.StatusTemporaryRedirect,
+				Header:     http.Header{"Location": []string{redirected}},
+				Body:       io.NopCloser(strings.NewReader("")),
+				Request:    request,
+			}, nil
+		}
+		return &http.Response{
+			StatusCode: http.StatusOK,
+			Header:     make(http.Header),
+			Body:       io.NopCloser(strings.NewReader(`{"choices":[{"message":{"content":"unexpected"}}]}`)),
+			Request:    request,
+		}, nil
+	})}
+	input := configkit.Input{Source: configkit.Mapping("redirect diagnostic", map[string]any{
+		"profiles": map[string]any{"profile": map[string]any{"endpoint": base, "model": "model"}},
+	})}
+	engine, err := promptkit.NewEngine(promptkit.Config{
+		Sources: promptkit.ConfigurationSources{Main: &input}, HTTPClient: client,
+	})
+	if err != nil {
+		t.Fatal(err)
+	}
+	report, err := engine.SmokeTest(context.Background(), promptkit.SmokeTestRequest{
+		Kind: promptkit.SmokeTestTextInference, ProfileID: "profile",
+	})
+	if err != nil || report == nil || !report.Completed || len(report.Attempts) != 1 || len(observed) != 2 {
+		t.Fatalf("report=%+v error=%v observed=%v", report, err, observed)
+	}
+	if observed[0] != base+"/chat/completions" || observed[1] != redirected ||
+		report.Target.Endpoint != observed[0] || report.Target.EffectiveSettings.Endpoint != base ||
+		report.Attempts[0].InitialEndpoint != observed[0] || report.Attempts[0].Endpoint != observed[1] {
+		t.Fatalf("incorrect redirect attribution: target=%+v attempt=%+v observed=%v", report.Target, report.Attempts[0], observed)
+	}
+}