Adopt ReleaseKit v0.9.0 and refresh recovery guidance

Finalize v0.18.0 notes and retire completed plans
Document the bundled OpenRouter configuration
2026-11-04 02:10:48 +00:00 · 2026-11-04 00:33:44 +00:00 · 2026-11-03 15:39:04 +00:00 · 2026-11-03 15:36:26 +00:00 · 2026-11-03 15:34:10 +00:00 · 2026-11-03 15:32:25 +00:00
36 changed files with 1244 additions and 271 deletions
--- a/README.md
+++ b/README.md
@@ -26,6 +26,8 @@ source-relative prompt content, supplies an inline input, and prepares through
 a scoped view. The example also demonstrates collection inventories and
 namespace-filtered discovery, without contacting a provider or requiring
 credentials.
+The example disables the bundled OpenRouter configuration to keep its
+inventories limited to its own offline fixtures.
 The [consumer guide](docs/consumers/pkg-promptkit.md) also shows a local backend,
 ordered file/embedded sources, programmatic mappings, and how to replace an
 engine when source files change. Applications adapting the prior keyed
@@ -43,6 +45,11 @@ boundary and constraints that framework work must preserve.

 ## Release Guidance

+The [v0.18.0 release notes](docs/releases/v0.18.0.md) cover the default-on
+OpenRouter backend and profiles, recorded configuration normalization, and
+ConfigKit v1.1. The notes explain inventory changes and the bundle opt-out;
+the Go 1.27 minimum remains unchanged.
+
 The [v0.17.0 release notes](docs/releases/v0.17.0.md) cover the vanity module
 path, ConfigKit v1, identified resource lists, removal of prompt-version
 metadata, and the Go 1.27 minimum. This is a breaking pre-v1 migration.
--- a/bundled_composition_contract_test.go
+++ b/bundled_composition_contract_test.go
@@ -0,0 +1,115 @@
+package promptkit_test
+
+import (
+	"context"
+	"fmt"
+	"strings"
+	"testing"
+
+	"go.maximumdirect.net/configkit"
+	"go.maximumdirect.net/promptkit"
+)
+
+func TestBundledCompositionReplacementAndInheritance(t *testing.T) {
+	underlay := configkit.Input{Source: configkit.Mapping("caller underlay", map[string]any{
+		"profiles": []any{map[string]any{"id": "gpt-sol-latest", "model": "underlay-model"}},
+	})}
+	underlayEngine, err := promptkit.NewEngine(promptkit.Config{Sources: promptkit.ConfigurationSources{Underlays: []configkit.Underlay{{Inputs: []configkit.Input{underlay}}}}})
+	if err != nil {
+		t.Fatal(err)
+	}
+	underlayProfile, err := underlayEngine.InspectProfile(context.Background(), "gpt-sol-latest")
+	if err != nil || underlayProfile.EffectiveModelParams.Model != "underlay-model" || underlayProfile.EffectiveModelParams.BackendID != "" {
+		t.Fatalf("underlay replacement = %+v, %v", underlayProfile, err)
+	}
+	main := configkit.Input{Source: configkit.Mapping("caller main", map[string]any{
+		"backends": []any{map[string]any{"id": "openrouter", "endpoint": "https://local.invalid/v1"}, map[string]any{"id": "other", "endpoint": "https://other.invalid/v1"}},
+		"profiles": []any{
+			map[string]any{"id": "gpt-sol-latest", "model": "main-model"},
+			map[string]any{"id": "custom", "extends": map[string]any{"id": "gpt-luna-latest"}, "model": "custom-model"},
+			map[string]any{"id": "auto", "backend": "other", "model": "other-model"},
+		},
+		"collections": map[string]any{"openrouter": map[string]any{
+			"backends": []any{map[string]any{"id": "local", "endpoint": "https://collection.invalid/v1"}},
+			"profiles": []any{map[string]any{"id": "profile", "backend": "openrouter/local", "model": "collection-model"}},
+		}},
+	})}
+	engine, err := promptkit.NewEngine(promptkit.Config{Sources: promptkit.ConfigurationSources{Underlays: []configkit.Underlay{{Inputs: []configkit.Input{underlay}}}, Main: &main}})
+	if err != nil {
+		t.Fatal(err)
+	}
+	inspect := func(id string) promptkit.ExecutionTarget {
+		t.Helper()
+		profile, err := engine.InspectProfile(context.Background(), id)
+		if err != nil {
+			t.Fatal(err)
+		}
+		return profile.EffectiveModelParams
+	}
+	if target := inspect("gpt-sol-latest"); target.Model != "main-model" || target.BackendID != "" {
+		t.Fatalf("replacement = %+v", target)
+	}
+	if target := inspect("custom"); target.Model != "custom-model" || target.BackendID != "openrouter" || target.Endpoint != "https://local.invalid/v1" {
+		t.Fatalf("inherited = %+v", target)
+	}
+	if target := inspect("gpt-luna-latest"); target.Endpoint != "https://local.invalid/v1" || target.APIKeyEnv != "" {
+		t.Fatalf("backend replacement = %+v", target)
+	}
+	if target := inspect("openrouter/profile"); target.BackendID != "openrouter/local" || target.Model != "collection-model" {
+		t.Fatalf("collection = %+v", target)
+	}
+	for _, tier := range []string{"low", "medium", "high", "xhigh", "max"} {
+		target := inspect("auto-" + tier)
+		if target.BackendID != "other" || target.Model != "other-model" || !strings.Contains(fmt.Sprint(target.ExtraParams), "cost_tier:"+tier) || !strings.Contains(fmt.Sprint(target.ExtraParams), "id:auto-router") {
+			t.Errorf("tier %s = %+v", tier, target)
+		}
+	}
+}
+
+func TestBundledCompositionSequenceModes(t *testing.T) {
+	for _, test := range []struct {
+		name, mode, id string
+		wantErr        bool
+		count          int
+	}{
+		{"duplicate append", "append", "auto", true, 0},
+		{"distinct append", "append", "custom", false, 18},
+		{"replace", "replace", "custom", false, 1},
+	} {
+		t.Run(test.name, func(t *testing.T) {
+			input := configkit.Input{Source: configkit.Mapping("sequence", map[string]any{
+				"config":   map[string]any{"sequences": []any{map[string]any{"destination": []any{"profiles"}, "mode": test.mode}}},
+				"profiles": []any{map[string]any{"id": test.id, "model": "custom-model"}},
+			})}
+			engine, err := promptkit.NewEngine(promptkit.Config{Sources: promptkit.ConfigurationSources{Main: &input}})
+			if test.wantErr {
+				if err == nil {
+					t.Fatal("expected duplicate rejection")
+				}
+				return
+			}
+			if err != nil {
+				t.Fatal(err)
+			}
+			profiles, err := engine.ListProfiles(context.Background())
+			if err != nil || len(profiles) != test.count {
+				t.Fatalf("profiles = %v, %v", profiles, err)
+			}
+		})
+	}
+}
+
+func TestBundledCompositionRejectsStrictConflictsAndMissingBackends(t *testing.T) {
+	profile := configkit.Input{Source: configkit.Mapping("profile", map[string]any{"profiles": []any{map[string]any{"id": "auto", "model": "caller"}}})}
+	_, err := promptkit.NewEngine(promptkit.Config{Sources: promptkit.ConfigurationSources{Underlays: []configkit.Underlay{{Inputs: []configkit.Input{profile, profile}}}}})
+	if err == nil {
+		t.Fatal("strict group accepted duplicate records")
+	}
+	input := configkit.Input{Source: configkit.Mapping("replace backends", map[string]any{
+		"config":   map[string]any{"sequences": []any{map[string]any{"destination": []any{"backends"}, "mode": "replace"}}},
+		"backends": []any{map[string]any{"id": "other", "endpoint": "https://other.invalid/v1"}},
+	})}
+	if _, err := promptkit.NewEngine(promptkit.Config{Sources: promptkit.ConfigurationSources{Main: &input}}); err == nil {
+		t.Fatal("missing bundled backend was accepted")
+	}
+}
--- a/bundled_execution_contract_test.go
+++ b/bundled_execution_contract_test.go
@@ -0,0 +1,90 @@
+package promptkit_test
+
+import (
+	"context"
+	"encoding/json"
+	"errors"
+	"io"
+	"net/http"
+	"reflect"
+	"strings"
+	"testing"
+
+	"go.maximumdirect.net/configkit"
+	"go.maximumdirect.net/promptkit"
+)
+
+func bundledPromptConfig(client *http.Client) promptkit.Config {
+	input := configkit.Input{Source: configkit.Mapping("prompt", map[string]any{"prompts": []any{map[string]any{
+		"id": "prompt", "messages": []any{map[string]any{"role": "user", "content": "hello"}}, "output": map[string]any{"format": "text", "validation_mode": "none"},
+	}}})}
+	return promptkit.Config{HTTPClient: client, Sources: promptkit.ConfigurationSources{Main: &input}}
+}
+
+func TestBundledProfilePreparationAndExecution(t *testing.T) {
+	client := &fakeLLMClient{response: &promptkit.GenerateResponse{Content: "ok"}}
+	engine, err := promptkit.NewEngine(bundledPromptConfig(nil), promptkit.WithLLMClient(client))
+	if err != nil {
+		t.Fatal(err)
+	}
+	if _, err := engine.PrepareExecution(context.Background(), promptkit.RunRequest{PromptID: "prompt"}); !errors.Is(err, promptkit.ErrProfileRequired) {
+		t.Fatalf("missing profile = %v", err)
+	}
+	temperature := 0.3
+	request := promptkit.RunRequest{PromptID: "prompt", ProfileID: "gpt-luna-latest", Execution: &promptkit.ExecutionTargetOverride{Temperature: &temperature}}
+	prepared, err := engine.PrepareExecution(context.Background(), request)
+	if err != nil {
+		t.Fatal(err)
+	}
+	details := prepared.Details()
+	if details.SelectedProfileID != "gpt-luna-latest" || details.EffectiveModelParams.Model != "~openai/gpt-luna-latest" || details.EffectiveModelParams.BackendID != "openrouter" || details.EffectiveModelParams.Temperature != temperature {
+		t.Fatalf("prepared target = %+v", details.EffectiveModelParams)
+	}
+	if _, err := engine.Run(context.Background(), request); err != nil {
+		t.Fatal(err)
+	}
+	if len(client.requests) != 1 || client.requests[0].Target.Model != "~openai/gpt-luna-latest" || client.requests[0].Target.BackendID != "openrouter" {
+		t.Fatalf("requests = %+v", client.requests)
+	}
+}
+
+func TestBundledProfileHTTPPayloads(t *testing.T) {
+	t.Setenv("OPENROUTER_API_KEY", "synthetic-key")
+	for _, test := range []struct{ id, model, tier string }{
+		{"auto-low", "openrouter/auto", "low"}, {"auto-medium", "openrouter/auto", "medium"}, {"auto-high", "openrouter/auto", "high"}, {"auto-xhigh", "openrouter/auto", "xhigh"}, {"auto-max", "openrouter/auto", "max"},
+		{"auto", "openrouter/auto", ""}, {"free", "openrouter/free", ""}, {"gpt-luna-latest", "~openai/gpt-luna-latest", ""},
+	} {
+		t.Run(test.id, func(t *testing.T) {
+			var body map[string]any
+			transport := roundTripFunc(func(request *http.Request) (*http.Response, error) {
+				if request.Header.Get("Authorization") != "Bearer synthetic-key" {
+					t.Errorf("authorization = %q", request.Header.Get("Authorization"))
+				}
+				if err := json.NewDecoder(request.Body).Decode(&body); err != nil {
+					t.Fatal(err)
+				}
+				return &http.Response{StatusCode: 200, Header: make(http.Header), Body: io.NopCloser(strings.NewReader(`{"choices":[{"message":{"content":"ok"}}]}`))}, nil
+			})
+			engine, err := promptkit.NewEngine(bundledPromptConfig(&http.Client{Transport: transport}))
+			if err != nil {
+				t.Fatal(err)
+			}
+			if _, err := engine.Run(context.Background(), promptkit.RunRequest{PromptID: "prompt", ProfileID: test.id}); err != nil {
+				t.Fatal(err)
+			}
+			if body["model"] != test.model || body["extra_params"] != nil {
+				t.Fatalf("request = %+v", body)
+			}
+			if test.tier == "" {
+				if _, exists := body["plugins"]; exists {
+					t.Fatalf("unexpected plugins = %+v", body)
+				}
+				return
+			}
+			want := []any{map[string]any{"id": "auto-router", "cost_tier": test.tier}}
+			if !reflect.DeepEqual(body["plugins"], want) {
+				t.Fatalf("plugins = %#v, want %#v", body["plugins"], want)
+			}
+		})
+	}
+}
--- a/bundled_openrouter_contract_test.go
+++ b/bundled_openrouter_contract_test.go
@@ -0,0 +1,124 @@
+package promptkit_test
+
+import (
+	"context"
+	"errors"
+	"net/http"
+	"reflect"
+	"strings"
+	"testing"
+
+	"go.maximumdirect.net/configkit"
+	"go.maximumdirect.net/promptkit"
+)
+
+type rejectBundleTransport struct{}
+
+func (rejectBundleTransport) RoundTrip(*http.Request) (*http.Response, error) {
+	return nil, errors.New("unexpected HTTP request")
+}
+
+func TestBundledOpenRouterOptionsAndInventory(t *testing.T) {
+	t.Setenv("OPENROUTER_API_KEY", "")
+	for _, test := range []struct {
+		name    string
+		options []promptkit.Option
+		enabled bool
+	}{
+		{"default", nil, true}, {"enabled", []promptkit.Option{promptkit.WithBundledOpenRouter(true)}, true},
+		{"disabled", []promptkit.Option{promptkit.WithBundledOpenRouter(false)}, false},
+		{"last disables", []promptkit.Option{promptkit.WithBundledOpenRouter(true), promptkit.WithBundledOpenRouter(false)}, false},
+		{"last enables", []promptkit.Option{promptkit.WithBundledOpenRouter(false), promptkit.WithBundledOpenRouter(true)}, true},
+	} {
+		t.Run(test.name, func(t *testing.T) {
+			engine, err := promptkit.NewEngine(promptkit.Config{HTTPClient: &http.Client{Transport: rejectBundleTransport{}}}, test.options...)
+			if err != nil {
+				t.Fatal(err)
+			}
+			profiles, err := engine.ListProfiles(context.Background())
+			if err != nil {
+				t.Fatal(err)
+			}
+			backends, err := engine.ListBackends(context.Background())
+			if err != nil {
+				t.Fatal(err)
+			}
+			prompts, err := engine.ListPrompts(context.Background())
+			if err != nil {
+				t.Fatal(err)
+			}
+			collections, err := engine.ListCollections(context.Background())
+			if err != nil {
+				t.Fatal(err)
+			}
+			want := 0
+			if test.enabled {
+				want = 17
+			}
+			if len(profiles) != want || len(backends) != boolCount(test.enabled) || len(prompts) != 0 || len(collections) != 0 {
+				t.Fatalf("inventories: %v %v %v %v", profiles, backends, prompts, collections)
+			}
+			if test.enabled {
+				wantProfiles := []string{"auto", "auto-high", "auto-low", "auto-max", "auto-medium", "auto-xhigh", "claude-fable-latest", "claude-haiku-latest", "claude-opus-latest", "claude-sonnet-latest", "free", "gemini-flash-latest", "gemini-pro-latest", "gpt-astra-latest", "gpt-luna-latest", "gpt-sol-latest", "gpt-terra-latest"}
+				if !reflect.DeepEqual(profiles, wantProfiles) || !reflect.DeepEqual(backends, []string{"openrouter"}) {
+					t.Fatalf("bundle inventory: %v %v", profiles, backends)
+				}
+				for id, model := range map[string]string{"auto": "openrouter/auto", "auto-max": "openrouter/auto", "gpt-luna-latest": "~openai/gpt-luna-latest", "free": "openrouter/free"} {
+					profile, err := engine.InspectProfile(context.Background(), id)
+					if err != nil || profile.EffectiveModelParams.Model != model || profile.EffectiveModelParams.BackendID != "openrouter" {
+						t.Fatalf("profile %s = %+v, %v", id, profile, err)
+					}
+				}
+				view, err := engine.InspectConfiguration()
+				if err != nil {
+					t.Fatal(err)
+				}
+				if !strings.Contains(fmtSources(view.Sources()), "Promptkit bundled OpenRouter") {
+					t.Fatal("bundle source missing")
+				}
+				if explanation, found := view.Explain(configkit.Keys("backends").Index(0).Key("endpoint")); !found || !strings.Contains(explanation.Effective.YAML, "https://openrouter.ai/api/v1") || len(explanation.History) == 0 {
+					t.Fatalf("bundle explanation = %+v", explanation)
+				}
+			}
+		})
+	}
+}
+
+func boolCount(value bool) int {
+	if value {
+		return 1
+	}
+	return 0
+}
+func fmtSources(sources []configkit.SourceInfo) string {
+	var b strings.Builder
+	for _, source := range sources {
+		b.WriteString(source.Label)
+	}
+	return b.String()
+}
+
+func TestBundlePreservesCallerUnderlayBackingArray(t *testing.T) {
+	source := configkit.Mapping("caller", map[string]any{"profiles": []any{map[string]any{"id": "caller", "model": "model"}}})
+	groups := make([]configkit.Underlay, 1, 2)
+	groups[0] = configkit.Underlay{Inputs: []configkit.Input{{Source: source}}}
+	before := append([]configkit.Underlay(nil), groups...)
+	if _, err := promptkit.NewEngine(promptkit.Config{Sources: promptkit.ConfigurationSources{Underlays: groups}}); err != nil {
+		t.Fatal(err)
+	}
+	if !reflect.DeepEqual(groups, before) || !reflect.DeepEqual(groups[:2][1], configkit.Underlay{}) {
+		t.Fatal("caller underlays were modified")
+	}
+}
+
+func TestDisabledBundleKeepsCallerOpenRouter(t *testing.T) {
+	input := configkit.Input{Source: configkit.Mapping("caller", map[string]any{"backends": []any{map[string]any{"id": "openrouter", "endpoint": "https://local.invalid/v1"}}})}
+	engine, err := promptkit.NewEngine(promptkit.Config{Sources: promptkit.ConfigurationSources{Main: &input}}, promptkit.WithBundledOpenRouter(false))
+	if err != nil {
+		t.Fatal(err)
+	}
+	backends, err := engine.ListBackends(context.Background())
+	if err != nil || !reflect.DeepEqual(backends, []string{"openrouter"}) {
+		t.Fatalf("backends = %v, %v", backends, err)
+	}
+}
--- a/bundled_smoke_contract_test.go
+++ b/bundled_smoke_contract_test.go
@@ -0,0 +1,127 @@
+package promptkit_test
+
+import (
+	"context"
+	"encoding/json"
+	"io"
+	"net/http"
+	"reflect"
+	"strings"
+	"testing"
+
+	"go.maximumdirect.net/configkit"
+	"go.maximumdirect.net/promptkit"
+)
+
+func TestBundledSmokeHTTPDefaults(t *testing.T) {
+	t.Setenv("OPENROUTER_API_KEY", "synthetic-key")
+	var urls []string
+	var models []string
+	transport := roundTripFunc(func(request *http.Request) (*http.Response, error) {
+		urls = append(urls, request.URL.String())
+		body := `{"data":{"label":"member","is_free_tier":false,"usage":0}}`
+		if request.Method == http.MethodPost {
+			var payload map[string]any
+			if err := json.NewDecoder(request.Body).Decode(&payload); err != nil {
+				t.Fatal(err)
+			}
+			models = append(models, payload["model"].(string))
+			content := "PROMPTKIT_OK"
+			if _, structured := payload["response_format"]; structured {
+				content = `{"status":"ok"}`
+			}
+			encoded, err := json.Marshal(map[string]any{"choices": []any{map[string]any{"message": map[string]any{"content": content}}}})
+			if err != nil {
+				t.Fatal(err)
+			}
+			body = string(encoded)
+		} else if strings.HasSuffix(request.URL.Path, "/key") && request.Header.Get("Authorization") != "Bearer synthetic-key" {
+			t.Errorf("authentication header missing")
+		}
+		return &http.Response{StatusCode: 200, Header: make(http.Header), Body: io.NopCloser(strings.NewReader(body))}, nil
+	})
+	engine, err := promptkit.NewEngine(promptkit.Config{HTTPClient: &http.Client{Transport: transport}})
+	if err != nil {
+		t.Fatal(err)
+	}
+	before, _ := engine.ListProfiles(context.Background())
+	inspectionBefore, err := engine.InspectConfiguration()
+	if err != nil {
+		t.Fatal(err)
+	}
+	for _, kind := range []promptkit.SmokeTestKind{promptkit.SmokeTestReachability, promptkit.SmokeTestAuthentication, promptkit.SmokeTestTextInference, promptkit.SmokeTestStructuredOutput} {
+		report, err := engine.SmokeTest(context.Background(), promptkit.SmokeTestRequest{Kind: kind, BackendID: "openrouter"})
+		if err != nil || report == nil || !report.Completed || report.Failure != "" {
+			t.Fatalf("%s report = %+v, %v", kind, report, err)
+		}
+		if kind == promptkit.SmokeTestAuthentication && (report.Facts.CredentialsAccepted == nil || !*report.Facts.CredentialsAccepted) {
+			t.Fatalf("authentication facts = %+v", report.Facts)
+		}
+		if kind == promptkit.SmokeTestTextInference || kind == promptkit.SmokeTestStructuredOutput {
+			if report.Target.ProfileID != "gpt-luna-latest" || report.Target.EffectiveSettings.Model != "~openai/gpt-luna-latest" {
+				t.Fatalf("target = %+v", report.Target)
+			}
+		}
+	}
+	wantURLs := []string{"https://openrouter.ai/api/v1", "https://openrouter.ai/api/v1/key", "https://openrouter.ai/api/v1/chat/completions", "https://openrouter.ai/api/v1/chat/completions"}
+	if !reflect.DeepEqual(urls, wantURLs) || !reflect.DeepEqual(models, []string{"~openai/gpt-luna-latest", "~openai/gpt-luna-latest"}) {
+		t.Fatalf("urls %v, models %v", urls, models)
+	}
+	after, _ := engine.ListProfiles(context.Background())
+	if !reflect.DeepEqual(before, after) {
+		t.Fatalf("inventory changed: %v %v", before, after)
+	}
+	inspectionAfter, err := engine.InspectConfiguration()
+	if err != nil {
+		t.Fatal(err)
+	}
+	diff, err := inspectionBefore.Diff(inspectionAfter)
+	if err != nil || len(diff) != 0 {
+		t.Fatalf("inspection changed: %+v, %v", diff, err)
+	}
+}
+
+func TestBundledSmokeSelectionUsesEffectiveConfiguration(t *testing.T) {
+	replacement := configkit.Input{Source: configkit.Mapping("replacement", map[string]any{"profiles": []any{map[string]any{"id": "gpt-luna-latest", "backend": "openrouter", "model": "replacement"}}})}
+	replacementClient := &fakeLLMClient{response: &promptkit.GenerateResponse{Content: "PROMPTKIT_OK"}}
+	replacementEngine, err := promptkit.NewEngine(promptkit.Config{Sources: promptkit.ConfigurationSources{Main: &replacement}}, promptkit.WithLLMClient(replacementClient))
+	if err != nil {
+		t.Fatal(err)
+	}
+	replacementReport, err := replacementEngine.SmokeTest(context.Background(), promptkit.SmokeTestRequest{Kind: promptkit.SmokeTestTextInference, BackendID: "openrouter"})
+	if err != nil || replacementReport.Target.ProfileID != "gpt-luna-latest" || replacementReport.Target.EffectiveSettings.Model != "replacement" {
+		t.Fatalf("replaced default = %+v, %v", replacementReport, err)
+	}
+	replacementClient.response.Content = "unexpected"
+	mismatch, err := replacementEngine.SmokeTest(context.Background(), promptkit.SmokeTestRequest{Kind: promptkit.SmokeTestTextInference, BackendID: "openrouter"})
+	if err != nil || mismatch == nil || !mismatch.Completed {
+		t.Fatalf("concluded mismatch = %+v, %v", mismatch, err)
+	}
+	input := configkit.Input{Source: configkit.Mapping("application", map[string]any{
+		"backends": []any{map[string]any{"id": "openrouter", "endpoint": "https://example.invalid/v1", "smoke_tests": map[string]any{"default_profile": "custom"}}},
+		"profiles": []any{map[string]any{"id": "gpt-luna-latest", "backend": "openrouter", "model": "replacement"}, map[string]any{"id": "custom", "backend": "openrouter", "model": "custom-model"}},
+		"prompts":  []any{map[string]any{"id": "prompt", "default_profile": "free", "messages": []any{map[string]any{"role": "user", "content": "private application marker"}}, "output": map[string]any{"format": "text", "validation_mode": "none"}}},
+	})}
+	client := &fakeLLMClient{response: &promptkit.GenerateResponse{Content: "PROMPTKIT_OK"}}
+	engine, err := promptkit.NewEngine(promptkit.Config{Sources: promptkit.ConfigurationSources{Main: &input}}, promptkit.WithLLMClient(client))
+	if err != nil {
+		t.Fatal(err)
+	}
+	for _, test := range []struct {
+		request        promptkit.SmokeTestRequest
+		profile, model string
+	}{
+		{promptkit.SmokeTestRequest{BackendID: "openrouter"}, "custom", "custom-model"},
+		{promptkit.SmokeTestRequest{BackendID: "openrouter", PromptID: "prompt"}, "free", "openrouter/free"},
+		{promptkit.SmokeTestRequest{BackendID: "openrouter", PromptID: "prompt", ProfileID: "gpt-luna-latest"}, "gpt-luna-latest", "replacement"},
+	} {
+		test.request.Kind = promptkit.SmokeTestTextInference
+		report, err := engine.SmokeTest(context.Background(), test.request)
+		if err != nil || report.Target.ProfileID != test.profile || report.Target.EffectiveSettings.Model != test.model {
+			t.Fatalf("report = %+v, %v", report, err)
+		}
+		if strings.Contains(client.requests[len(client.requests)-1].Prompt.Messages[0].Content, "private application marker") {
+			t.Fatal("application content used by diagnostic")
+		}
+	}
+}
--- a/configuration_diff_contract_test.go
+++ b/configuration_diff_contract_test.go
@@ -81,6 +81,34 @@ func TestConfigurationInspectionDiffIgnoresSourceHistory(t *testing.T) {
 	}
 }

+func TestConfigurationInspectionDiffUsesNormalizedValues(t *testing.T) {
+	inspect := func(endpoint string) promptkit.ConfigurationInspection {
+		t.Helper()
+		engine, err := promptkit.NewEngine(promptkit.Config{Sources: promptkit.ConfigurationSources{Underlays: []configkit.Underlay{{Inputs: []configkit.Input{{Source: configkit.Mapping("backend", map[string]any{
+			"backends": []any{map[string]any{"id": "local", "endpoint": endpoint}},
+		})}}}}}})
+		if err != nil {
+			t.Fatal(err)
+		}
+		view, err := engine.InspectConfiguration()
+		if err != nil {
+			t.Fatal(err)
+		}
+		return view
+	}
+	left := inspect(" HTTPS://example.invalid/v1 ")
+	equal := inspect("https://example.invalid/v1")
+	differences, err := left.Diff(equal)
+	if err != nil || len(differences) != 0 {
+		t.Fatalf("normalized diff = %+v, %v", differences, err)
+	}
+	changed := inspect("https://other.invalid/v1")
+	differences, err = left.Diff(changed)
+	if err != nil || len(differences) != 1 || differences[0].Path.String() != "/backends" {
+		t.Fatalf("changed diff = %+v, %v", differences, err)
+	}
+}
+
 func TestConfigurationInspectionDiffReportsPresenceAndSequences(t *testing.T) {
 	left := comparisonInspectionFrom(t, "before", "same-model", map[string]any{
 		"sequence": []any{"earlier", "unchanged"},
--- a/configuration_inspection_contract_test.go
+++ b/configuration_inspection_contract_test.go
@@ -21,7 +21,7 @@ func TestConfigurationInspectionReportsLiteralKeysAndRedactedHistory(t *testing.
 		Underlays: []configkit.Underlay{
 			{Inputs: []configkit.Input{{Source: configkit.Mapping("defaults", map[string]any{
 				"backends": []any{map[string]any{
-					"id": "local", "endpoint": "https://example.invalid/v1", "api_key_env": "OPTIONAL_KEY",
+					"id": "local", "endpoint": " HTTPS://example.invalid/v1 ", "api_key_env": "OPTIONAL_KEY",
 					"extra_params": map[string]any{"token": "private-sentinel", "visible": "public-value"},
 				}},
 				"collections": map[string]any{"literal": map[string]any{
@@ -42,7 +42,7 @@ func TestConfigurationInspectionReportsLiteralKeysAndRedactedHistory(t *testing.
 				}},
 			})}}},
 		},
-	}})
+	}}, promptkit.WithBundledOpenRouter(false))
 	if err != nil {
 		t.Fatalf("construct layered engine: %v", err)
 	}
@@ -64,6 +64,11 @@ func TestConfigurationInspectionReportsLiteralKeysAndRedactedHistory(t *testing.
 		t.Fatalf("literal-key path = %q", inheritedPath)
 	}
 	secretPath := configkit.Keys("backends").Index(0).Key("extra_params").Key("token")
+	endpointPath := configkit.Keys("backends").Index(0).Key("endpoint")
+	endpoint, found := view.Explain(endpointPath)
+	if !found || !strings.Contains(endpoint.Effective.YAML, "https://example.invalid/v1") || strings.Contains(fmt.Sprintf("%+v", view.Metadata().History(endpointPath)), "private-sentinel") {
+		t.Fatalf("normalized endpoint explanation = %+v", endpoint)
+	}
 	secret, found := view.Explain(secretPath)
 	if !found || !secret.Effective.Redacted || strings.Contains(secret.Effective.YAML, "private-sentinel") {
 		t.Fatalf("credential-shaped provider value was not redacted: (%+v, %t)", secret, found)
--- a/construction_contract_test.go
+++ b/construction_contract_test.go
@@ -291,7 +291,7 @@ func TestBackendSourceOwnsSmokeTestValuesAndDefersDefaultLookup(t *testing.T) {
 		"https://backend.example/v1",
 		"not-yet-listed",
 		"https://probe.example/ready?check=1",
-		" OPENROUTER_KEY ",
+		"openrouter_key",
 		"https://probe.example/key?scope=current",
 	} {
 		if !strings.Contains(contents, want) {
--- a/docs/consumers/configuration-migration.md
+++ b/docs/consumers/configuration-migration.md
@@ -3,7 +3,7 @@
 This breaking pre-v1 minor migration adopts Promptkit's vanity module path,
 changes the v0.16-era keyed resources to identified lists, adopts ConfigKit v1,
 and removes prompt-version labels.
-Promptkit does not install a provider catalog; applications choose configuration
+Promptkit installs a default-on bundled OpenRouter catalog; applications choose configuration
 inputs explicitly, and execution selects one prompt by its exact ID. This guide
 explains the shape changes and decisions an application must make; it is not an
 automatic migration tool. The [framework format reference](../formats.md) owns
@@ -134,9 +134,9 @@ Replace former maps passed to `BackendSource` in the same way, setting each
 `BackendConfig.ID`. Duplicates are retained for loading to reject. Resource
 inspection paths now address list indexes, for example
 `configkit.Keys("profiles").Index(0).Key("model")`. Configuration inspection
-and diffs expose composed values and provenance, while `InspectProfile` and
-other interpreted views expose Promptkit normalization and defaults; the views
-are not promised to be identical.
+and diffs expose resolved values, recorded normalization and provenance.
+`InspectProfile` additionally applies backend completion; request preparation
+can apply further overrides, so the views are not promised to be identical.

 Remove `PromptVersion` and `PromptIdentity.Version` uses and the corresponding
 `prompt_version` JSON members. Prompt hashes are opaque equality values and may
--- a/docs/consumers/pkg-promptkit.md
+++ b/docs/consumers/pkg-promptkit.md
@@ -18,7 +18,7 @@ import "go.maximumdirect.net/promptkit"
 For migration from the former module path, see
 [Update Go Imports](configuration-migration.md#update-go-imports).

-Configuration APIs use `go.maximumdirect.net/configkit` v1.0.0. Its types are
+Configuration APIs use `go.maximumdirect.net/configkit` v1.1.0. Its types are
 not interchangeable with the old ConfigKit module path.

 The maintained [offline preparation example](../../examples/go-library/prepare/main.go)
@@ -52,6 +52,32 @@ Create an engine with [`NewEngine`](../../engine.go). Select each directory
 explicitly and place its inputs in an ordered ConfigKit underlay. A group
 strictly composes its files; later groups can overlay earlier ones:

+The bundled OpenRouter backend and profiles are installed in a lower underlay
+by default. Select a profile explicitly, for example:
+
+```go
+input := configkit.Input{Source: configkit.Mapping("application", map[string]any{
+	"prompts": []any{map[string]any{
+		"id": "my-prompt",
+		"messages": []any{map[string]any{"role": "user", "content": "Hello"}},
+		"output": map[string]any{"format": "text", "validation_mode": "none"},
+	}},
+})}
+engine, err := promptkit.NewEngine(promptkit.Config{Sources: promptkit.ConfigurationSources{Main: &input}})
+if err != nil { return err }
+result, err := engine.Run(ctx, promptkit.RunRequest{PromptID: "my-prompt", ProfileID: "gpt-luna-latest"})
+```
+
+The backend looks up
+`OPENROUTER_API_KEY` when available; credentials are not required at engine
+construction. For the complete inventory and diagnostic defaults see the
+[format reference](../formats.md#bundled-openrouter-configuration). Use
+`promptkit.WithBundledOpenRouter(false)` for application-only inventories.
+Caller records replace matching bundled records in full; use `extends` with a
+distinct ID to inherit. Replacing `auto` also changes its cost-tier children's
+inherited target, while their plugins remain. External collections remain
+supported.
+
 ```go
 promptInputs, err := promptkit.DirectoryInputs("prompts")
 if err != nil { return err }
@@ -211,7 +237,7 @@ sensitive application data.
 ## Inspect The Captured Configuration

 Use [`Engine.InspectConfiguration`](../../configuration_inspection.go) for an
-operator-selected report of composed configuration, source descriptions,
+operator-selected report of resolved configuration, source descriptions,
 diagnostics, and path history. Configuration inspection uses list indexes in
 the collection's nested path rather than qualified runtime IDs. For a profile
 at index `i` in collection `team`, construct the path with `configkit.Keys`:
@@ -230,8 +256,9 @@ if found && explanation.Effective.Redacted {
 the application decides whether those reports may be disclosed. Credential-
 shaped provider keys are redacted, but arbitrary prompt and provider content
 is not necessarily safe to share. Inspection uses the engine's captured result
-and does not reopen sources or resolve credentials. It retains composed values
-and provenance rather than Promptkit's normalized/defaulted interpretation.
+and does not reopen sources or resolve credentials. It retains effective values,
+including recorded field normalization and queue defaulting, alongside source
+provenance.
 `InspectProfile` instead shows backend-completed execution settings for one profile, and `Prepare` or
 `PreparedExecution.Details` shows request-specific rendered messages, inputs,
 and validation resources. None of those views is a substitute for the others.
@@ -263,11 +290,13 @@ for _, difference := range differences {
 ```

 See the [`ConfigurationInspection.Diff` GoDoc](../../configuration_inspection.go)
-and ConfigKit's [v1.0.0 effective-configuration diff guidance](https://forge.maximumdirect.net/base-layer/configkit/src/tag/v1.0.0/docs/config.md#effective-configuration-diffs)
+and ConfigKit's [v1.1.0 effective-configuration diff guidance](https://forge.maximumdirect.net/base-layer/configkit/src/tag/v1.1.0/docs/config.md#effective-configuration-diffs)
 for the exact comparison contract. The operation compares only frozen effective
 configuration values: it does not reread external files or compare their
 contents, resolved credential contents, later execution preparation, or
-request-specific overrides. An empty diff is not proof of equivalent execution.
+request-specific overrides. Inputs normalizing to the same effective value do
+not create a value diff; lists are compared atomically. An empty diff is not
+proof of equivalent execution.
 Records can contain ordinary application data, so use the application's
 disclosure policy when presenting them.

@@ -662,9 +691,9 @@ the engine to pick up changed definitions or message files.
 ### Choose A Profile Ownership Model

 Supply backend and profile definitions through the configuration sources your
-application selects. PromptKit does not install provider catalogs or built-in
-profile inventories; conventional backend ID constants are names only. Define
-the model, endpoint, credentials lookup, and settings that your application
+application selects, alongside the default-on bundled OpenRouter inventory.
+Conventional backend ID constants are names only. Define or replace the model,
+endpoint, credentials lookup, and settings that your application
 intends to support. A profile may inherit a sibling profile by its local key in
 the same root or collection list; its backend reference uses the exact
 configured identity. Caller-selected source layers determine the final values. The
--- a/docs/formats.md
+++ b/docs/formats.md
@@ -6,7 +6,7 @@ This is the canonical reference for Promptkit's backend, profile, prompt, and
 schema definitions. The [Go consumer guide](consumers/pkg-promptkit.md) shows
 how to select sources and use an engine; the
 [OpenAI-compatible integration contract](integrations/openai-compatible-chat.md)
-owns outbound wire behavior. [ConfigKit](https://forge.maximumdirect.net/base-layer/configkit/src/tag/v1.0.0/docs/config.md)
+owns outbound wire behavior. [ConfigKit](https://forge.maximumdirect.net/base-layer/configkit/src/tag/v1.1.0/docs/config.md)
 owns the generic YAML grammar, imports, layering, inheritance, and diagnostics.
 This reference describes what Promptkit does with the final effective values.

@@ -14,8 +14,8 @@ A configuration document may contain top-level `backends`, `profiles`, and
 `prompts` lists, plus a `collections` mapping of namespaced resource groups.
 Each resource has an explicit literal `id`, not a filename-derived identity.
 IDs and references must be nonblank and remain exact: Promptkit does not trim or
-re-key them. Unknown fields are errors. Promptkit installs no provider or
-profile catalog; callers select the definitions they need.
+re-key them. Unknown fields are errors. Promptkit installs a default-on bundled
+OpenRouter underlay; callers still explicitly select a profile.

 ```yaml
 backends:
@@ -86,9 +86,10 @@ list. It is not a qualified or cross-collection reference.
 no label; an explicitly empty string is retained. It does not select a resource
 or change execution. Runtime lookups
 use the captured effective resource indexes. `InspectConfiguration` is an
-explicit operator view of composed settings and provenance. Normalization and
-defaults appear in Promptkit's interpreted execution views, not as changes to
-that composed tree. Source history is not a second runtime resolver, and the
+explicit operator view of resolved settings and provenance. Selected field
+normalizations and the derived queue default are recorded in that tree, with
+source history retained. Request-time completion remains separate. Source
+history is not a second runtime resolver, and the
 retained effective shape is not flattened or rewritten into those indexes.

 For examples of explicitly selecting native collection inputs and inspecting
@@ -331,9 +332,58 @@ For example, a runtime `extra_params["extends"]` key is ordinary provider
 data, not a configuration inheritance instruction. An explicit zero timeout
 does not disable the caller context or HTTP transport timeout.

+### Bundled OpenRouter Configuration
+
+The default bundle installs root backend `openrouter`, endpoint
+`https://openrouter.ai/api/v1`, optional credential environment name
+`OPENROUTER_API_KEY`, and smoke metadata selecting `gpt-luna-latest` with the
+`openrouter_key` authentication adapter. Existing diagnostic endpoint fallback
+applies. No prompt, implicit profile selection, or tuning defaults are installed.
+Disable the entire bundle with `WithBundledOpenRouter(false)`.
+
+The root profile IDs and their models are:
+
+| Profile | Model |
+| --- | --- |
+| `gpt-astra-latest` | `~openai/gpt-astra-latest` |
+| `gpt-sol-latest` | `~openai/gpt-sol-latest` |
+| `gpt-terra-latest` | `~openai/gpt-terra-latest` |
+| `gpt-luna-latest` | `~openai/gpt-luna-latest` |
+| `claude-fable-latest` | `~anthropic/claude-fable-latest` |
+| `claude-opus-latest` | `~anthropic/claude-opus-latest` |
+| `claude-sonnet-latest` | `~anthropic/claude-sonnet-latest` |
+| `claude-haiku-latest` | `~anthropic/claude-haiku-latest` |
+| `gemini-pro-latest` | `~google/gemini-pro-latest` |
+| `gemini-flash-latest` | `~google/gemini-flash-latest` |
+| `auto` | `openrouter/auto` |
+| `free` | `openrouter/free` |
+
+The profiles `auto-low`, `auto-medium`, `auto-high`, `auto-xhigh`, and
+`auto-max` extend `auto` and add an `auto-router` plugin with the corresponding
+`cost_tier`. Replacing `auto` changes their inherited backend and model while
+retaining their plugins. These are root IDs even when a model contains `/`.
+For example, a caller can replace `auto` as a complete record and extend another
+bundled profile under a new ID:
+
+```yaml
+profiles:
+  - id: auto
+    backend: openrouter
+    model: openrouter/free
+  - id: my-luna
+    extends: {id: gpt-luna-latest}
+    timeout_seconds: 60
+```
+
+See OpenRouter's [alias examples](https://openrouter.ai/~openai/gpt-luna-latest),
+[auto router and cost tiers](https://openrouter.ai/docs/guides/routing/routers/auto-router),
+and [free router](https://openrouter.ai/docs/guides/routing/routers/free-router)
+for provider behavior and availability.
+
 ### Source And Profile Precedence

-`NewEngine` composes caller underlays in their given order, followed by an
+`NewEngine` composes the bundled OpenRouter underlay first by default, then
+caller underlays in their given order, followed by an
 optional main input. Later layers overlay earlier ones. Inputs within one
 underlay group are strictly composed: conflicting contributions are errors,
 not priority signals. The directory helpers discover `.yaml` and `.yml` files recursively
@@ -363,7 +413,7 @@ references are exact IDs and use their qualified form when they select a
 collection resource. There is no Promptkit-specific depth limit or second
 base-chain resolver. Missing references and cycles fail at construction. For
 generic inheritance and layer mechanics, consult
-[ConfigKit](https://forge.maximumdirect.net/base-layer/configkit/src/tag/v1.0.0/docs/config.md).
+[ConfigKit](https://forge.maximumdirect.net/base-layer/configkit/src/tag/v1.1.0/docs/config.md).

 ## Schemas

--- a/docs/internal/sources.md
+++ b/docs/internal/sources.md
@@ -12,13 +12,12 @@ source semantics. Internal packages are not consumer APIs.

 `internal/configuration` is the single adapter from ConfigKit's final
 effective configuration to execution-owned definitions. It performs one
-layered load, captures effective presence (including explicit null), builds
-detached normalized interpretations during validation, and validates all effective
+layered load, captures effective presence (including explicit null), records
+field-level normalization and derived defaults during resolution, and validates all effective
 root and collection backend, profile, and prompt values. Replaced lower-layer
 domain values are not separately validated. It indexes root resources under
 their unqualified IDs and collection resources under their full
-`namespace/local-key` IDs while retaining ConfigKit's effective tree in its
-authored shape. It builds an immutable backend index and presence-aware profile
+`namespace/local-key` IDs while retaining ConfigKit's resolved tree. It builds an immutable backend index and presence-aware profile
 targets, applying final backend defaults only after profile inheritance. Runtime
 lookups use those final indexes and exact stored references; they do not rewrite
 or resolve resources from ConfigKit source history. The runtime/domain packages
@@ -27,7 +26,7 @@ do not depend on ConfigKit.
 ConfigKit owns source headers, imports, composition, and source evidence.
 Promptkit does not preparse contributions: it validates the final effective
 values once, captures the indexed identities and their original resource
-contexts, and retains ConfigKit's composed result for explicit operator inspection.
+contexts, and retains ConfigKit's resolved result for explicit operator inspection.
 Accepted non-main source headers are consumed during composition; the main
 source declaration remains available in that inspection view. Collection
 release labels are descriptive metadata, not selection inputs. The
@@ -37,12 +36,12 @@ owns the exact source-header and collection contracts.
 The `ConfigurationInspection.Diff` facade method compares two retained results
 through a private wrapper and a narrow `internal/configuration.Diff` bridge.
 The wrapper keeps `Result[document]` inside the adapter; the bridge delegates
-once to ConfigKit v1.0.0 and returns its public difference records. Comparison
+once to ConfigKit v1.1.0 and returns its public difference records. Comparison
 uses only frozen effective values and does not reopen sources, resolve runtime
 credentials, or enter the execution path. ConfigKit applies sensitivity from
 both results; reports may still contain ordinary application data. See the
 [consumer comparison guide](../consumers/pkg-promptkit.md#inspect-the-captured-configuration)
-and ConfigKit's [v1.0.0 comparison contract](https://forge.maximumdirect.net/base-layer/configkit/src/tag/v1.0.0/docs/config.md#effective-configuration-diffs).
+and ConfigKit's [v1.1.0 comparison contract](https://forge.maximumdirect.net/base-layer/configkit/src/tag/v1.1.0/docs/config.md#effective-configuration-diffs).

 After resource materialization and effective-profile snapshot construction, the
 adapter captures lexically ordered identity inventories for backends, profiles,
@@ -53,7 +52,9 @@ captured values without consulting ConfigKit or copying resource definitions.
 The root `DirectoryInputs` and `FilesystemInputs` helpers discover sorted YAML
 files under an explicit root, provide resource context, and leave imports
 disabled. Each returned slice belongs to one strict-composition group; file
-order does not confer priority. Caller underlays are composed in their given
+order does not confer priority. Engine assembly prepends a dedicated embedded
+OpenRouter underlay unless disabled, without modifying caller-owned slices.
+Caller underlays are composed in their given
 order, followed by the optional main input. The
 [configuration tests](../../internal/configuration/load_test.go) exercise the
 real loader and final-value handoff.
@@ -85,12 +86,11 @@ returning and retains no source capability for public inspection.
 Prompt materialization shares a lazy metadata snapshot across root and collection
 resources during construction, avoiding a full metadata copy per collection.

-Normalization and defaults are applied to execution-owned interpretations,
-including message roles and cache controls. ConfigKit retains the composed
-values and origins, rather than synthetic Promptkit normalization events. List
-indexes identify fields for presence, validation, sensitivity, and resource
-context; full IDs select captured runtime indexes. Recording a sequence-wide
-normalization would replace origins of unchanged content-file fields.
+Normalization and defaults are recorded at individual resolved field paths,
+including message roles and cache controls. List indexes identify fields for
+presence, validation, sensitivity, and resource context; full IDs select
+captured runtime indexes. Unchanged content-file fields retain their origins.
+Backend-to-profile and request-time completion remain separate runtime work.

 The runner selects full definitions from this index for preparation and uses
 captured prompt metadata for `InspectPrompt` and `InspectRequirements`; the
--- a/docs/oss/attribution.md
+++ b/docs/oss/attribution.md
@@ -26,17 +26,31 @@ License and notices: [CC BY-SA 4.0](licenses/CC-BY-SA-4.0.txt) |

 ## ConfigKit

-Selected module: `go.maximumdirect.net/configkit` at `v1.0.0`.
+Selected module: `go.maximumdirect.net/configkit` at `v1.1.0`.

 Copyright (C) 2026 Eric Rakestraw

 SPDX-License-Identifier: LGPL-3.0-or-later

 License and notices: [LGPL 3.0](../../LICENSE) |
-[COPYRIGHT](https://forge.maximumdirect.net/base-layer/configkit/src/commit/c88aac990b23f48a31f9046b830d4d0954f57f53/COPYRIGHT) |
-[LICENSE](https://forge.maximumdirect.net/base-layer/configkit/src/commit/c88aac990b23f48a31f9046b830d4d0954f57f53/LICENSE).
+[COPYRIGHT](https://forge.maximumdirect.net/base-layer/configkit/src/commit/191015e289d7f2b91abb9fdd9c4f2f5cf75b4de9/COPYRIGHT) |
+[LICENSE](https://forge.maximumdirect.net/base-layer/configkit/src/commit/191015e289d7f2b91abb9fdd9c4f2f5cf75b4de9/LICENSE).

-[Source](https://forge.maximumdirect.net/base-layer/configkit/src/commit/c88aac990b23f48a31f9046b830d4d0954f57f53).
+[Source](https://forge.maximumdirect.net/base-layer/configkit/src/commit/191015e289d7f2b91abb9fdd9c4f2f5cf75b4de9).
+
+## ReleaseKit
+
+Selected module: `go.maximumdirect.net/releasekit` at `v0.9.0` (maintainer tool).
+
+Copyright (C) 2026 Eric Rakestraw
+
+SPDX-License-Identifier: LGPL-3.0-or-later
+
+License and notices: [LGPL 3.0](../../LICENSE) |
+[COPYRIGHT](https://forge.maximumdirect.net/base-layer/releasekit/src/commit/2180aa868ec2caa95fc8279fd59d5f0ebac41bd4/COPYRIGHT) |
+[LICENSE](https://forge.maximumdirect.net/base-layer/releasekit/src/commit/2180aa868ec2caa95fc8279fd59d5f0ebac41bd4/LICENSE).
+
+[Source](https://forge.maximumdirect.net/base-layer/releasekit/src/commit/2180aa868ec2caa95fc8279fd59d5f0ebac41bd4).

 ## jsonschema

--- a/docs/release.md
+++ b/docs/release.md
@@ -74,8 +74,8 @@ Successful publication needs no separate remote read-back or CI wait.

 For optional local diagnosis, use `./scripts/releasekit.sh check VERSION`.
 It is not a required step before publication. The upstream
-[candidate-check guide](https://forge.maximumdirect.net/base-layer/releasekit/src/tag/v0.8.0/docs/consumers/check.md)
-and [CLI contract](https://forge.maximumdirect.net/base-layer/releasekit/src/tag/v0.8.0/docs/cli.md)
+[candidate-check guide](https://forge.maximumdirect.net/base-layer/releasekit/src/tag/v0.9.0/docs/consumers/check.md)
+and [CLI contract](https://forge.maximumdirect.net/base-layer/releasekit/src/tag/v0.9.0/docs/cli.md)
 own shared checks and exit-status definitions.

 ## Deliver The Hosted Release
@@ -97,14 +97,26 @@ For a later retry, use a clean checkout of the original tag with its recorded
 module files and supply the token there. In a separate checkout, for example:

 ```sh
-git switch --detach vMAJOR.MINOR.PATCH
-./scripts/releasekit.sh deliver vMAJOR.MINOR.PATCH
+(
+  set -e
+  release_version=vMAJOR.MINOR.PATCH
+  release_tag_ref="refs/tags/$release_version"
+  git fetch origin "$release_tag_ref:$release_tag_ref"
+  release_tag_commit=$(git rev-parse --verify "$release_tag_ref^{commit}")
+  git switch --detach "$release_tag_commit"
+  release_worktree_status=$(git status --porcelain --untracked-files=all)
+  if [ -n "$release_worktree_status" ]; then
+    printf '%s\n' 'Delivery retry requires a clean tagged checkout.' >&2
+    exit 1
+  fi
+  ./scripts/releasekit.sh deliver "$release_version"
+)
 ```

 Resolve uncertain hosted writes before retrying the same immutable version.
 Matching content is accepted; conflicts are not overwritten. Do not rerun
 `publish` or move tags to repair delivery. Follow the upstream
-[delivery guide](https://forge.maximumdirect.net/base-layer/releasekit/src/tag/v0.8.0/docs/consumers/delivery.md)
+[delivery guide](https://forge.maximumdirect.net/base-layer/releasekit/src/tag/v0.9.0/docs/consumers/delivery.md)
 for result interpretation and recovery. These commands apply to tags containing
 this delivery configuration; older releases retain their original workflows.

@@ -131,13 +143,13 @@ and explicitly select the matching attempt:
 Discovery is local; reconciliation observes the original destination without
 rerunning validation, changing tags, or delivering hosted content. Neither is
 a routine gate after successful publication. Follow the upstream
-[recovery procedure](https://forge.maximumdirect.net/base-layer/releasekit/src/tag/v0.8.0/docs/release.md#resolve-publication-failures)
+[recovery procedure](https://forge.maximumdirect.net/base-layer/releasekit/src/tag/v0.9.0/docs/release.md#resolve-publication-failures)
 for outcomes, incomplete evidence, and older attempts without records.

 Records are stored under Git's common directory by default and can contain
 credential-bearing endpoints. Keep them private, out of source control and
 shared logs; retain them while needed for recovery and remove them when that
-value expires. See the [evidence guide](https://forge.maximumdirect.net/base-layer/releasekit/src/tag/v0.8.0/docs/consumers/publish.md#retain-and-reconcile-publication-evidence)
+value expires. See the [evidence guide](https://forge.maximumdirect.net/base-layer/releasekit/src/tag/v0.9.0/docs/consumers/publish.md#retain-and-reconcile-publication-evidence)
 for storage and retention details.

 Current absence does not prove a version was never published. Remove a retained
--- a/docs/releases/v0.18.0.md
+++ b/docs/releases/v0.18.0.md
@@ -0,0 +1,65 @@
+# Promptkit v0.18.0
+
+Configuration inspection now exposes Promptkit's recorded field normalization
+and derived queue-capacity defaults through ConfigKit v1.1.0. Engines also
+include a default-on OpenRouter configuration. The minimum supported Go
+version remains 1.27.0.
+
+## Bundled OpenRouter Backend And Profiles
+
+New engines include an embedded OpenRouter backend and seventeen root profiles:
+ten latest-family aliases, the auto and free routers, and five auto-router
+cost-tier variants. Select a profile explicitly in a prompt or request; the
+bundle does not supply an implicit execution profile or contact providers
+during construction. The backend uses `OPENROUTER_API_KEY` when available under
+the existing optional-credential rules.
+
+The bundle is the lowest-priority underlay. Applications can replace its records
+or derive named variants through ordinary configuration, and external collections
+remain supported. Cost-tier variants inherit the effective `auto` profile, so
+replacing that parent changes their inherited target while retaining plugins.
+The [bundle reference](../formats.md#bundled-openrouter-configuration) owns the
+inventory and composition details.
+
+Explicit smoke diagnostics now have OpenRouter authentication metadata and an
+inference fallback profile. They remain opt-in and may incur provider costs.
+Latest aliases and routers can change upstream; configured slugs do not pin
+the concrete model, pricing, or availability. See the
+[consumer guide](../consumers/pkg-promptkit.md#construct-an-engine) for selection
+and opt-out examples.
+
+## Recorded Configuration Normalization
+
+Inspection shows normalized backend and profile settings, prompt metadata, and
+configured message roles and cache controls, with field-level resolution
+history. Existing source evidence remains available, and unchanged content-file
+origins continue to select their resource context.
+
+Configuration diffs compare normalized effective values, so spelling-only
+changes that normalize identically may no longer appear. Lists remain atomic in
+diffs. Inspection does not include backend-to-profile completion or request
+overrides; see the [configuration inspection guide](../consumers/pkg-promptkit.md#inspect-the-captured-configuration).
+
+## Compatibility And Upgrade
+
+New engines install a bundled OpenRouter backend and root profiles by default.
+Inventory listings and inspection sources therefore change, and references to
+bundled IDs that previously failed may now resolve. Pass
+`promptkit.WithBundledOpenRouter(false)` to retain application-only behavior.
+Caller records can replace bundled definitions through ordinary composition;
+same-ID replacements replace complete records rather than merging selected fields.
+No configuration-format migration is required from v0.17.0.
+Consumers that display or compare configuration inspection results should account
+for normalized values and derived defaults replacing their earlier authored
+representations. Request-time overrides and caller-appended messages retain
+their existing processing.
+
+```sh
+go get go.maximumdirect.net/promptkit@v0.18.0
+```
+
+See the [framework format reference](../formats.md) for current configuration
+semantics. Consumers upgrading from versions before v0.17.0 should also follow
+the [configuration and API migration guide](../consumers/configuration-migration.md).
+
+[COPYRIGHT](https://forge.maximumdirect.net/base-layer/promptkit/src/tag/v0.18.0/COPYRIGHT) | [LICENSE](https://forge.maximumdirect.net/base-layer/promptkit/src/tag/v0.18.0/LICENSE) | [ATTRIBUTION](https://forge.maximumdirect.net/base-layer/promptkit/src/tag/v0.18.0/docs/oss/attribution.md)
--- a/docs/roadmap/future.md
+++ b/docs/roadmap/future.md
@@ -38,30 +38,8 @@ consumers.

 ## Ideas

-### Field-Level Normalization With Preserved List Provenance
-
-Reevaluate normalizing resource fields directly in ConfigKit's effective
-configuration after upstream ConfigKit supports recording changes within a
-list without replacing the source attribution of unchanged fields.
-
-This could let configuration inspection show PromptKit-normalized values and
-field-level change history while preserving the origins needed to resolve
-relative resources such as `content_file`. Assess whether that inspection
-benefit justifies changing the execution-owned normalization approach.
-
-Include normalization of roles and cache-control values in configured messages
-in this reevaluation. This could make inspection reflect the values used for
-execution and reduce separate normalization paths. Upstream support would need
-to preserve untouched field origins within nested message lists as well as outer
-resource lists. PromptKit would continue owning the normalization rules;
-ConfigKit would record their effects and provenance. Caller-appended messages
-would still need request-time normalization because they do not pass through
-ConfigKit.
-Consider moving these transformations only if it improves inspection consistency
-and simplifies implementation without changing execution behavior.
-
-Upstream support is the reconsideration trigger, not a dependency of the
-current ConfigKit migration or a commitment to adopt the enhancement.
+No unselected ideas are currently recorded here. Deliberately postponed ideas
+remain in the [deferred catalog](deferred.md).

 ## Entry Format

--- a/engine.go
+++ b/engine.go
@@ -101,8 +101,9 @@ type Engine struct {
 }

 // ConfigurationSources selects ordered ConfigKit underlays and an optional
-// highest-priority main input. Each underlay's inputs strictly compose within
-// their group; later underlays overlay earlier ones. A nil Main uses
+// highest-priority main input. By default a bundled OpenRouter underlay precedes
+// the caller underlays; [WithBundledOpenRouter] can disable it. Inputs within
+// each underlay strictly compose; later underlays overlay earlier ones. A nil Main uses
 // ConfigKit's empty source. A non-nil Main is passed through unchanged and
 // may fail construction if invalid.
 type ConfigurationSources struct {
@@ -154,6 +155,15 @@ type engineOptions struct {
 	internal internalengine.Options
 }

+// WithBundledOpenRouter enables or disables the built-in OpenRouter underlay.
+// It is enabled by default; when repeated, the last option wins.
+func WithBundledOpenRouter(enabled bool) Option {
+	return optionFunc(func(options *engineOptions) error {
+		options.internal.SetBundledOpenRouter(enabled)
+		return nil
+	})
+}
+
 // WithLLMClient replaces the built-in model client used by [Engine.Run] and
 // [Engine.RunPrepared].
 //
@@ -213,7 +223,9 @@ func WithSchemaFile(path string) Option {
 // NewEngine constructs an Engine from configuration and options.
 //
 // ConfigKit composes caller-selected underlays in their given order, followed
-// by the optional main input. Construction validates the final effective
+// by the optional main input, after the default-on bundled OpenRouter underlay.
+// The bundle adds a root backend and profiles to inventories, but no prompts
+// or implicit profile selection. Construction validates the final effective
 // backend, profile, and prompt definitions and captures referenced prompt
 // content. A missing prompt collection is allowed. Schema documents and
 // request artifacts remain runtime resources.
--- a/examples/go-library/observe/main.go
+++ b/examples/go-library/observe/main.go
@@ -98,7 +98,7 @@ func run() (summary, error) {
 	engine, err := promptkit.NewEngine(promptkit.Config{
 		Sources:    promptkit.ConfigurationSources{Underlays: []configkit.Underlay{{Inputs: inputs}}},
 		HTTPClient: &http.Client{Transport: transport},
-	}, promptkit.WithSchemaFS(assets, "schemas"))
+	}, promptkit.WithBundledOpenRouter(false), promptkit.WithSchemaFS(assets, "schemas")) // Keep the example's configuration self-contained.
 	if err != nil {
 		return summary{}, err
 	}
--- a/examples/go-library/prepare/main.go
+++ b/examples/go-library/prepare/main.go
@@ -63,7 +63,7 @@ func run(ctx context.Context, exampleDir string, out io.Writer) error {
 			{Inputs: []configkit.Input{support, review}},
 			{Inputs: []configkit.Input{override}},
 		},
-	}})
+	}}, promptkit.WithBundledOpenRouter(false)) // Keep this example's inventory caller-owned.
 	if err != nil {
 		return err
 	}
--- a/examples/go-library/run/main.go
+++ b/examples/go-library/run/main.go
@@ -54,7 +54,7 @@ func run(ctx context.Context, exampleDir string, out io.Writer) error {
 			{ID: "offline-example", Endpoint: &endpoint, Model: &model},
 		})}}}},
 		Main: &configkit.Input{Source: configkit.File(filepath.Join(exampleDir, "prompt.yaml"))},
-	}}, promptkit.WithLLMClient(deterministicClient{}))
+	}}, promptkit.WithBundledOpenRouter(false), promptkit.WithLLMClient(deterministicClient{})) // Use only this example's offline configuration.
 	if err != nil {
 		return err
 	}
--- a/go.mod
+++ b/go.mod
@@ -4,12 +4,12 @@ go 1.27.0

 require (
 	github.com/santhosh-tekuri/jsonschema/v6 v6.0.2
-	go.maximumdirect.net/configkit v1.0.0
+	go.maximumdirect.net/configkit v1.1.0
 )

 require (
 	github.com/yuin/goldmark/v2 v2.1.6 // indirect
-	go.maximumdirect.net/releasekit v0.8.0 // indirect
+	go.maximumdirect.net/releasekit v0.9.0 // indirect
 	go.yaml.in/yaml/v4 v4.0.0-rc.6 // indirect
 	golang.org/x/mod v0.40.0 // indirect
 	golang.org/x/text v0.14.0 // indirect
--- a/go.sum
+++ b/go.sum
@@ -4,10 +4,10 @@ github.com/santhosh-tekuri/jsonschema/v6 v6.0.2 h1:KRzFb2m7YtdldCEkzs6KqmJw4nqEV
 github.com/santhosh-tekuri/jsonschema/v6 v6.0.2/go.mod h1:JXeL+ps8p7/KNMjDQk3TCwPpBy0wYklyWTfbkIzdIFU=
 github.com/yuin/goldmark/v2 v2.1.6 h1:igy0q9JcqovoFXFx/XjtU8sHVhcUHavPj2sA3EoKJUE=
 github.com/yuin/goldmark/v2 v2.1.6/go.mod h1:G6M4/qOFtfn01/o14BU1UR2Lo5N3S9Qo7xCuz/sHjGQ=
-go.maximumdirect.net/configkit v1.0.0 h1:cguQnxkaRk3ClQOZNzzhTdc4bfzbraGKv8CkoCp+HLc=
-go.maximumdirect.net/configkit v1.0.0/go.mod h1:B6fJ5xBLBF1nuywqfLeEI4sLm29UkIcDLu8i6I6gGXE=
-go.maximumdirect.net/releasekit v0.8.0 h1:hSaHPbUI7tAhnolfbu7UMj2fvmm9FGBY+jhkygdbxR0=
-go.maximumdirect.net/releasekit v0.8.0/go.mod h1:QE4BLrAhVJTzi+/YTcVl21K/qZp9ojRLg5kuoy3Zb44=
+go.maximumdirect.net/configkit v1.1.0 h1:UzXN2ZMnEkcL0O4YSLqD9qd9M1gb/NWCHQR/H8AaQzA=
+go.maximumdirect.net/configkit v1.1.0/go.mod h1:s1zLJ9GGB/1Q4a+aOHMLISonJxWFgNWpA6SpPlOafeA=
+go.maximumdirect.net/releasekit v0.9.0 h1:sK+Aoj6gS6ATU/1reocjwBekp4YETYENwkcX5ti6mrE=
+go.maximumdirect.net/releasekit v0.9.0/go.mod h1:QE4BLrAhVJTzi+/YTcVl21K/qZp9ojRLg5kuoy3Zb44=
 go.yaml.in/yaml/v4 v4.0.0-rc.6 h1:1h7H1ohdUh93/FyE4YaDa1Zh64K6VVbjF4K6WUxMtH4=
 go.yaml.in/yaml/v4 v4.0.0-rc.6/go.mod h1:aZqd9kCMsGL7AuUv/m/PvWLdg5sjJsZ4oHDEnfPPfY0=
 golang.org/x/mod v0.40.0 h1:hUv+3cXcdRHz08UmSiOob7sadHig73uo5bkXxQ/tvUs=
--- a/internal/configuration/bundled.go
+++ b/internal/configuration/bundled.go
@@ -0,0 +1,16 @@
+package configuration
+
+import (
+	"embed"
+
+	"go.maximumdirect.net/configkit"
+)
+
+//go:embed bundled/openrouter.yaml
+var bundledFiles embed.FS
+
+// BundledOpenRouterUnderlay returns the built-in OpenRouter configuration source.
+func BundledOpenRouterUnderlay() configkit.Underlay {
+	filesystem := configkit.NewFilesystem("Promptkit bundled OpenRouter", bundledFiles)
+	return configkit.Underlay{Inputs: []configkit.Input{{Source: filesystem.File("bundled/openrouter.yaml")}}}
+}
--- a/internal/configuration/bundled/openrouter.yaml
+++ b/internal/configuration/bundled/openrouter.yaml
@@ -0,0 +1,60 @@
+backends:
+  - id: openrouter
+    endpoint: https://openrouter.ai/api/v1
+    api_key_env: OPENROUTER_API_KEY
+    smoke_tests:
+      default_profile: gpt-luna-latest
+      authentication:
+        kind: openrouter_key
+profiles:
+  - id: gpt-astra-latest
+    backend: openrouter
+    model: ~openai/gpt-astra-latest
+  - id: gpt-sol-latest
+    backend: openrouter
+    model: ~openai/gpt-sol-latest
+  - id: gpt-terra-latest
+    backend: openrouter
+    model: ~openai/gpt-terra-latest
+  - id: gpt-luna-latest
+    backend: openrouter
+    model: ~openai/gpt-luna-latest
+  - id: claude-fable-latest
+    backend: openrouter
+    model: ~anthropic/claude-fable-latest
+  - id: claude-opus-latest
+    backend: openrouter
+    model: ~anthropic/claude-opus-latest
+  - id: claude-sonnet-latest
+    backend: openrouter
+    model: ~anthropic/claude-sonnet-latest
+  - id: claude-haiku-latest
+    backend: openrouter
+    model: ~anthropic/claude-haiku-latest
+  - id: gemini-pro-latest
+    backend: openrouter
+    model: ~google/gemini-pro-latest
+  - id: gemini-flash-latest
+    backend: openrouter
+    model: ~google/gemini-flash-latest
+  - id: auto
+    backend: openrouter
+    model: openrouter/auto
+  - id: free
+    backend: openrouter
+    model: openrouter/free
+  - id: auto-low
+    extends: {id: auto}
+    extra_params: {plugins: [{id: auto-router, cost_tier: low}]}
+  - id: auto-medium
+    extends: {id: auto}
+    extra_params: {plugins: [{id: auto-router, cost_tier: medium}]}
+  - id: auto-high
+    extends: {id: auto}
+    extra_params: {plugins: [{id: auto-router, cost_tier: high}]}
+  - id: auto-xhigh
+    extends: {id: auto}
+    extra_params: {plugins: [{id: auto-router, cost_tier: xhigh}]}
+  - id: auto-max
+    extends: {id: auto}
+    extra_params: {plugins: [{id: auto-router, cost_tier: max}]}
--- a/internal/configuration/bundled_test.go
+++ b/internal/configuration/bundled_test.go
@@ -0,0 +1,47 @@
+package configuration
+
+import (
+	"context"
+	"fmt"
+	"strings"
+	"testing"
+
+	"go.maximumdirect.net/configkit"
+)
+
+func TestBundledOpenRouterUnderlay(t *testing.T) {
+	state, err := Load(configkit.Input{Source: configkit.NoSource()}, []configkit.Underlay{BundledOpenRouterUnderlay()})
+	if err != nil {
+		t.Fatal(err)
+	}
+	backend, err := state.GetBackend("openrouter")
+	if err != nil || backend.Endpoint != "https://openrouter.ai/api/v1" || backend.APIKeyEnv != "OPENROUTER_API_KEY" || backend.SmokeTests == nil || backend.SmokeTests.DefaultProfile == nil || *backend.SmokeTests.DefaultProfile != "gpt-luna-latest" || backend.SmokeTests.Authentication == nil || *backend.SmokeTests.Authentication.Kind != "openrouter_key" {
+		t.Fatalf("backend = %+v, %v", backend, err)
+	}
+	models := map[string]string{
+		"gpt-astra-latest": "~openai/gpt-astra-latest", "gpt-sol-latest": "~openai/gpt-sol-latest", "gpt-terra-latest": "~openai/gpt-terra-latest", "gpt-luna-latest": "~openai/gpt-luna-latest",
+		"claude-fable-latest": "~anthropic/claude-fable-latest", "claude-opus-latest": "~anthropic/claude-opus-latest", "claude-sonnet-latest": "~anthropic/claude-sonnet-latest", "claude-haiku-latest": "~anthropic/claude-haiku-latest",
+		"gemini-pro-latest": "~google/gemini-pro-latest", "gemini-flash-latest": "~google/gemini-flash-latest", "auto": "openrouter/auto", "free": "openrouter/free",
+	}
+	for _, tier := range []string{"low", "medium", "high", "xhigh", "max"} {
+		models["auto-"+tier] = "openrouter/auto"
+	}
+	if len(state.profileIDs) != len(models) {
+		t.Fatalf("profiles = %v", state.profileIDs)
+	}
+	for id, model := range models {
+		profile, err := state.GetProfile(context.Background(), id)
+		if err != nil || profile.ResolvedTarget.Model != model || profile.ResolvedTarget.BackendID != "openrouter" {
+			t.Fatalf("profile %s = %+v, %v", id, profile, err)
+		}
+		if tier, ok := strings.CutPrefix(id, "auto-"); ok {
+			plugins := fmt.Sprint(profile.ResolvedTarget.ExtraParams)
+			if !strings.Contains(plugins, "cost_tier:"+tier) || !strings.Contains(plugins, "id:auto-router") {
+				t.Fatalf("profile %s plugins = %+v", id, profile.ResolvedTarget.ExtraParams)
+			}
+		}
+	}
+	if !strings.Contains(fmt.Sprint(state.result.Sources()), "Promptkit bundled OpenRouter") {
+		t.Fatalf("source evidence = %+v", state.result.Sources())
+	}
+}
--- a/internal/configuration/interpretation_test.go
+++ b/internal/configuration/interpretation_test.go
@@ -8,7 +8,7 @@ import (
 	"go.maximumdirect.net/configkit"
 )

-func TestTargetInterpretationPreservesComposedNestedValues(t *testing.T) {
+func TestTargetResolutionNormalizesNestedValues(t *testing.T) {
 	state, err := load(mapping("padded target", map[string]any{
 		"backends": []any{map[string]any{
 			"id": "local", "endpoint": " HTTPS://example.invalid/v1 ", "concurrency_limit": 1,
@@ -33,20 +33,32 @@ func TestTargetInterpretationPreservesComposedNestedValues(t *testing.T) {
 		t.Fatalf("interpreted profile = %+v, %v", profile, err)
 	}
 	composed := state.result.Config.Backends[0]
-	if *composed.Endpoint != " HTTPS://example.invalid/v1 " || composed.QueueCapacity != nil ||
-		*composed.SmokeTests.Reachability.Endpoint != " https://example.invalid/health " ||
-		*composed.SmokeTests.Authentication.Kind != " NONE " || *composed.SmokeTests.Authentication.Endpoint != " https://example.invalid/key " ||
-		*state.result.Config.Profiles[0].ServiceTier != " standard " || *state.result.Config.Profiles[0].APIKeyEnv != " TOKEN " {
-		t.Fatalf("composed values were mutated: %+v", state.result.Config)
+	if *composed.Endpoint != "https://example.invalid/v1" || composed.QueueCapacity == nil || *composed.QueueCapacity != 1024 ||
+		*composed.SmokeTests.Reachability.Endpoint != "https://example.invalid/health" ||
+		*composed.SmokeTests.Authentication.Kind != "none" || *composed.SmokeTests.Authentication.Endpoint != "https://example.invalid/key" ||
+		*state.result.Config.Profiles[0].ServiceTier != "standard" || *state.result.Config.Profiles[0].APIKeyEnv != "TOKEN" {
+		t.Fatalf("resolved values were not normalized: %+v", state.result.Config)
 	}
 	path := configkit.Keys("backends").Index(0).Key("smoke_tests").Key("authentication").Key("endpoint")
 	field, found := state.result.Metadata().Lookup(path)
-	if !found || len(field.Origin.Locations) == 0 || field.Origin.Operation == configkit.ChangeNormalization {
+	if !found || field.Origin.Operation != configkit.ChangeNormalization {
 		t.Fatalf("nested field origin changed: %+v", field)
 	}
+	for _, path := range []configkit.Path{
+		configkit.Keys("backends").Index(0).Key("endpoint"),
+		configkit.Keys("backends").Index(0).Key("smoke_tests").Key("reachability").Key("endpoint"),
+		configkit.Keys("backends").Index(0).Key("smoke_tests").Key("authentication").Key("kind"),
+		configkit.Keys("profiles").Index(0).Key("service_tier"),
+		configkit.Keys("profiles").Index(0).Key("api_key_env"),
+	} {
+		field, found := state.result.Metadata().Lookup(path)
+		if !found || field.Origin.Operation != configkit.ChangeNormalization {
+			t.Errorf("normalization at %v: %+v", path, field)
+		}
+	}
 }

-func TestPromptInterpretationPreservesComposedOutputAndRejectsDuplicateNames(t *testing.T) {
+func TestPromptResolutionNormalizesOutputAndRejectsDuplicateNames(t *testing.T) {
 	definition := map[string]any{
 		"id": "example", "inputs": []any{map[string]any{"name": " document "}},
 		"messages": []any{map[string]any{"role": "user", "content": "hello"}},
@@ -61,8 +73,8 @@ func TestPromptInterpretationPreservesComposedOutputAndRejectsDuplicateNames(t *
 		t.Fatalf("interpreted prompt = %+v, %+v, %v", selected, inspection, err)
 	}
 	composed := state.result.Config.Prompts[0]
-	if *composed.Output.SchemaPath != " schema.json " || composed.Inputs[0].Name != " document " {
-		t.Fatalf("composed prompt changed: %+v", composed)
+	if *composed.Output.SchemaPath != "schema.json" || composed.Inputs[0].Name != "document" {
+		t.Fatalf("prompt was not normalized: %+v", composed)
 	}
 	definition["inputs"] = []any{map[string]any{"name": " document "}, map[string]any{"name": "document"}}
 	_, err = load(mapping("duplicate inputs", map[string]any{"prompts": []any{definition}}), nil)
@@ -70,3 +82,71 @@ func TestPromptInterpretationPreservesComposedOutputAndRejectsDuplicateNames(t *
 		t.Fatalf("duplicate normalized names were not rejected: %v", err)
 	}
 }
+
+func TestPromptResolutionRecordsMessageFields(t *testing.T) {
+	loadPrompt := func(role, cacheType, ttl string) *loaded {
+		t.Helper()
+		state, err := load(mapping("prompt", map[string]any{"prompts": []any{map[string]any{
+			"id": "example", "inputs": []any{map[string]any{"name": " input ", "content_type": nil, "description": " text "}},
+			"messages": []any{map[string]any{"role": role, "content": "", "cache_control": map[string]any{"type": cacheType, "ttl": ttl}}},
+			"output":   map[string]any{"format": "text", "validation_mode": "basic"},
+		}}}), nil)
+		if err != nil {
+			t.Fatal(err)
+		}
+		return state
+	}
+	padded := loadPrompt(" USER ", " ephemeral ", " 1h ")
+	canonical := loadPrompt("user", "ephemeral", "1h")
+	definition, inspection, err := padded.prompt("example")
+	if err != nil {
+		t.Fatal(err)
+	}
+	other, otherInspection, err := canonical.prompt("example")
+	if err != nil || inspection.PromptHash != otherInspection.PromptHash || definition.Templates[0].Role != other.Templates[0].Role || definition.Templates[0].Content != "" {
+		t.Fatalf("equivalent prompt mismatch: %+v %+v %v", definition, other, err)
+	}
+	base := configkit.Keys("prompts").Index(0)
+	for _, path := range []configkit.Path{base.Key("inputs").Index(0).Key("name"), base.Key("inputs").Index(0).Key("description"), base.Key("messages").Index(0).Key("role"), base.Key("messages").Index(0).Key("cache_control").Key("type"), base.Key("messages").Index(0).Key("cache_control").Key("ttl")} {
+		field, found := padded.result.Metadata().Lookup(path)
+		if !found || field.Origin.Operation != configkit.ChangeNormalization {
+			t.Errorf("normalization at %v: %+v", path, field)
+		}
+	}
+	if padded.promptMetadata["example"][0].contentType != fieldNull {
+		t.Fatal("null input metadata was not retained")
+	}
+}
+
+func TestResolutionRecordsTargetDependencies(t *testing.T) {
+	backend := func(id string) map[string]any {
+		return map[string]any{"id": id, "endpoint": " HTTPS://example.invalid/v1 ", "concurrency_limit": 2, "queue_capacity": nil}
+	}
+	state, err := load(mapping("targets", map[string]any{
+		"backends":    []any{backend("root")},
+		"collections": map[string]any{"scoped": map[string]any{"backends": []any{backend("local")}}},
+	}), nil)
+	if err != nil {
+		t.Fatal(err)
+	}
+	for _, base := range []configkit.Path{configkit.Keys("backends").Index(0), configkit.Keys("collections", "scoped", "backends").Index(0)} {
+		endpoint, ok := state.result.Explain(base.Key("endpoint"))
+		if !ok || !strings.Contains(endpoint.Effective.YAML, "https://example.invalid/v1") {
+			t.Fatalf("endpoint explanation: %+v", endpoint)
+		}
+		history := state.result.Metadata().History(base.Key("queue_capacity"))
+		found := false
+		for _, change := range history {
+			if change.Origin.Operation == configkit.ChangeDerivedDefault {
+				for _, dependency := range change.Dependencies {
+					if dependency.String() == base.Key("concurrency_limit").String() {
+						found = true
+					}
+				}
+			}
+		}
+		if !found {
+			t.Fatalf("missing queue dependency: %+v", history)
+		}
+	}
+}
--- a/internal/configuration/load.go
+++ b/internal/configuration/load.go
@@ -4,7 +4,6 @@ package configuration

 import (
 	"fmt"
-	"net/http"
 	"regexp"
 	"sort"
 	"strings"
@@ -120,7 +119,6 @@ const (

 type loaded struct {
 	result          *configkit.Result[document]
-	interpreted     document
 	backends        map[string]map[string]fieldState
 	profiles        map[string]map[string]fieldState
 	promptMetadata  map[string][]promptInputPresence
@@ -243,11 +241,15 @@ func configurationDefinition(state *loaded) configkit.Definition[document] {
 				captureFields(resources.profiles, func(v profileConfig) string { return v.ID }, resources.bases.profiles, resources.namespace, profileFields, resolution, state.profiles)
 				capturePromptMetadata(resources.prompts, resources.bases.prompts, resources.namespace, resolution, state.promptMetadata)
 			}
+			for _, resources := range resourceSets(config) {
+				resolveBackends(resources.backends, resources.bases.backends, resolution)
+				resolveProfiles(resources.profiles, resources.bases.profiles, resolution)
+				resolvePrompts(resources.prompts, resources.bases.prompts, resolution)
+			}
 			return nil
 		},
 		Validate: func(config *document, validation *configkit.Validation) {
-			state.interpreted = interpretConfiguration(config, validation)
-			validateEffective(&state.interpreted, validation)
+			validateEffective(config, validation)
 		},
 	}
 }
@@ -274,7 +276,7 @@ func load(main configkit.Input, underlays []configkit.Underlay) (*loaded, error)
 	if err := state.buildExecutionProfiles(); err != nil {
 		return nil, fmt.Errorf("load configuration: %w", err)
 	}
-	state.backendIDs = sortedKeys(indexedBackends(&state.interpreted))
+	state.backendIDs = sortedKeys(indexedBackends(&state.result.Config))
 	state.profileIDs = sortedKeys(state.indexedProfiles)
 	for _, id := range sortedKeys(state.prompts) {
 		state.promptIDs = append(state.promptIDs, domain.PromptIdentity{ID: id})
@@ -372,6 +374,29 @@ func captureFields[T any](entries []T, identity func(T) string, basePath configk
 	}
 }

+// eligibleResourceList leaves invalid identities to the existing validation
+// boundaries, without mutating a list that cannot be recorded by identity.
+func eligibleResourceList[T any](entries []T, identity func(T) string) bool {
+	seen := make(map[string]struct{}, len(entries))
+	for _, entry := range entries {
+		id := identity(entry)
+		if !domain.IsValidLocalResourceKey(id) {
+			return false
+		}
+		if _, exists := seen[id]; exists {
+			return false
+		}
+		seen[id] = struct{}{}
+	}
+	return true
+}
+
+func recordStringNormalization(value **string, path configkit.Path, resolution *configkit.Resolution, normalized string) {
+	if *value != nil && **value != normalized {
+		configkit.Normalize(resolution, path, value, &normalized, "Normalize configured value")
+	}
+}
+
 func sortedKeys[T any](entries map[string]T) []string {
 	keys := make([]string, 0, len(entries))
 	for key := range entries {
@@ -381,113 +406,6 @@ func sortedKeys[T any](entries map[string]T) []string {
 	return keys
 }

-func interpretConfiguration(config *document, validation *configkit.Validation) document {
-	interpreted := *config
-	interpreted.Backends = interpretBackends(config.Backends, configkit.Keys("backends"), validation)
-	interpreted.Profiles = interpretProfiles(config.Profiles, configkit.Keys("profiles"), validation)
-	interpreted.Prompts = interpretPrompts(config.Prompts)
-	if config.Collections != nil {
-		interpreted.Collections = make(map[string]collectionConfig, len(config.Collections))
-		for namespace, original := range config.Collections {
-			collection := original
-			base := configkit.Keys("collections", namespace)
-			collection.Backends = interpretBackends(original.Backends, base.Key("backends"), validation)
-			collection.Profiles = interpretProfiles(original.Profiles, base.Key("profiles"), validation)
-			collection.Prompts = interpretPrompts(original.Prompts)
-			interpreted.Collections[namespace] = collection
-		}
-	}
-	return interpreted
-}
-
-func interpretBackends(source []backendConfig, basePath configkit.Path, validation *configkit.Validation) []backendConfig {
-	if source == nil {
-		return nil
-	}
-	backends := append([]backendConfig{}, source...)
-	for index := range backends {
-		backend := &backends[index]
-		base := basePath.Index(index)
-		if backend.Endpoint != nil {
-			endpoint, err := domain.NormalizeOpenAICompatibleBaseEndpoint(*backend.Endpoint)
-			if err != nil {
-				validation.Error(base.Key("endpoint"), err.Error())
-			} else {
-				backend.Endpoint = &endpoint
-			}
-		}
-		if backend.APIKeyEnv != nil {
-			value := strings.TrimSpace(*backend.APIKeyEnv)
-			backend.APIKeyEnv = &value
-		}
-		if backend.SmokeTests != nil {
-			smokeTests := *backend.SmokeTests
-			backend.SmokeTests = &smokeTests
-			smokePath := base.Key("smoke_tests")
-			if smokeTests.Reachability != nil {
-				reachability := *smokeTests.Reachability
-				smokeTests.Reachability = &reachability
-				normalizeDiagnosticEndpoint(&reachability.Endpoint, smokePath.Key("reachability").Key("endpoint"), validation)
-			}
-			if smokeTests.Authentication != nil {
-				authentication := *smokeTests.Authentication
-				smokeTests.Authentication = &authentication
-				if authentication.Kind != nil {
-					kind := strings.ToLower(strings.TrimSpace(*authentication.Kind))
-					authentication.Kind = &kind
-				}
-				normalizeDiagnosticEndpoint(&authentication.Endpoint, smokePath.Key("authentication").Key("endpoint"), validation)
-			}
-		}
-		if backend.ConcurrencyLimit != nil && *backend.ConcurrencyLimit > 0 && backend.QueueCapacity == nil {
-			capacity := 1024
-			backend.QueueCapacity = &capacity
-		}
-	}
-	return backends
-}
-
-func normalizeDiagnosticEndpoint(value **string, path configkit.Path, validation *configkit.Validation) {
-	if value == nil || *value == nil {
-		return
-	}
-	normalized := strings.TrimSpace(**value)
-	request, err := http.NewRequest(http.MethodGet, normalized, nil)
-	if normalized == "" || err != nil || request.URL == nil ||
-		(strings.ToLower(request.URL.Scheme) != "http" && strings.ToLower(request.URL.Scheme) != "https") ||
-		request.URL.Hostname() == "" {
-		validation.Error(path, "diagnostic endpoint must be an absolute HTTP(S) URL with a host")
-		return
-	}
-	*value = &normalized
-}
-
-func interpretProfiles(source []profileConfig, basePath configkit.Path, validation *configkit.Validation) []profileConfig {
-	if source == nil {
-		return nil
-	}
-	profiles := append([]profileConfig{}, source...)
-	for index := range profiles {
-		profile := &profiles[index]
-		base := basePath.Index(index)
-		if profile.Endpoint != nil && *profile.Endpoint != "" {
-			endpoint, err := domain.NormalizeOpenAICompatibleBaseEndpoint(*profile.Endpoint)
-			if err != nil {
-				validation.Error(base.Key("endpoint"), err.Error())
-			} else {
-				profile.Endpoint = &endpoint
-			}
-		}
-		for _, value := range []**string{&profile.ServiceTier, &profile.ReasoningEffort, &profile.APIKeyEnv} {
-			if *value != nil {
-				normalized := strings.TrimSpace(**value)
-				*value = &normalized
-			}
-		}
-	}
-	return profiles
-}
-
 func validateEffective(config *document, validation *configkit.Validation) {
 	sets := resourceSets(config)
 	backendIDs := make(map[string]struct{})
@@ -502,6 +420,7 @@ func validateEffective(config *document, validation *configkit.Validation) {
 	for _, resources := range sets {
 		for index, backend := range resources.backends {
 			base := resources.bases.backends.Index(index)
+			validateBackendEndpoints(backend, base, validation)
 			if !domain.IsValidLocalResourceKey(backend.ID) {
 				validation.Error(base.Key("id"), "backend ID must be a nonblank local key without a slash")
 			}
@@ -546,6 +465,11 @@ func validateEffective(config *document, validation *configkit.Validation) {
 		}
 		for index, profile := range resources.profiles {
 			base := resources.bases.profiles.Index(index)
+			if profile.Endpoint != nil && *profile.Endpoint != "" {
+				if _, err := domain.NormalizeOpenAICompatibleBaseEndpoint(*profile.Endpoint); err != nil {
+					validation.Error(base.Key("endpoint"), err.Error())
+				}
+			}
 			if !domain.IsValidLocalResourceKey(profile.ID) {
 				validation.Error(base.Key("id"), "profile ID must be a nonblank local key without a slash")
 			}
--- a/internal/configuration/load_test.go
+++ b/internal/configuration/load_test.go
@@ -153,6 +153,50 @@ func TestIdentifiedResourcesRejectDuplicateStrictPeers(t *testing.T) {
 	}
 }

+func TestInvalidIdentitiesWithNormalizableFieldsAreRejected(t *testing.T) {
+	for _, kind := range []string{"backends", "profiles", "prompts"} {
+		for _, id := range []string{" ", "bad/id"} {
+			t.Run(kind+"/"+id, func(t *testing.T) {
+				record := map[string]any{"id": id}
+				switch kind {
+				case "backends":
+					record["endpoint"] = " HTTPS://example.invalid/v1 "
+					record["concurrency_limit"] = 1
+				case "profiles":
+					record["service_tier"] = " standard "
+				case "prompts":
+					record["description"] = " padded "
+				}
+				_, err := load(mapping("invalid", map[string]any{kind: []any{record}}), nil)
+				if err == nil || strings.Contains(strings.ToLower(err.Error()), "unrecorded") {
+					t.Fatalf("invalid identity error = %v", err)
+				}
+			})
+		}
+	}
+}
+
+func TestDuplicateIdentitiesWithNormalizableFieldsAreRejected(t *testing.T) {
+	for _, kind := range []string{"backends", "profiles", "prompts"} {
+		t.Run(kind, func(t *testing.T) {
+			record := map[string]any{"id": "same"}
+			switch kind {
+			case "backends":
+				record["endpoint"] = " HTTPS://example.invalid/v1 "
+				record["concurrency_limit"] = 1
+			case "profiles":
+				record["service_tier"] = " standard "
+			case "prompts":
+				record["description"] = " padded "
+			}
+			_, err := load(mapping("duplicates", map[string]any{kind: []any{record, record}}), nil)
+			if err == nil || strings.Contains(strings.ToLower(err.Error()), "unrecorded") {
+				t.Fatalf("duplicate identity error = %v", err)
+			}
+		})
+	}
+}
+
 func TestFinalIdentitiesAreCheckedAfterApplicationResolution(t *testing.T) {
 	for _, kind := range []string{"backends", "profiles", "prompts"} {
 		for _, namespace := range []string{"", "*"} {
@@ -534,17 +578,25 @@ func TestLoadInterpretsBackendNormalizationAndNullDefault(t *testing.T) {
 		t.Fatalf("backend normalization/default was not applied: %+v", backend)
 	}
 	composed := loaded.result.Config.Backends[0]
-	if composed.Endpoint == nil || *composed.Endpoint != " HTTP://localhost:8080/v1 " ||
-		composed.APIKeyEnv == nil || *composed.APIKeyEnv != " TOKEN_NAME " || composed.QueueCapacity != nil {
-		t.Fatalf("composed backend was changed: %+v", composed)
+	if composed.Endpoint == nil || *composed.Endpoint != "http://localhost:8080/v1" ||
+		composed.APIKeyEnv == nil || *composed.APIKeyEnv != "TOKEN_NAME" || composed.QueueCapacity == nil || *composed.QueueCapacity != 1024 {
+		t.Fatalf("resolved backend was not normalized: %+v", composed)
 	}
 	if loaded.backends["local"]["queue_capacity"] != fieldNull {
 		t.Fatalf("explicit null was not retained: %+v", loaded.backends["local"])
 	}
 	field, found := loaded.result.Metadata().Lookup(configkit.Keys("backends").Index(0).Key("endpoint"))
-	if !found || field.Origin.Operation == configkit.ChangeNormalization || len(field.Origin.Locations) == 0 {
+	if !found || field.Origin.Operation != configkit.ChangeNormalization {
 		t.Fatalf("endpoint origin was not preserved: %+v", field)
 	}
+	field, found = loaded.result.Metadata().Lookup(configkit.Keys("backends").Index(0).Key("queue_capacity"))
+	if !found || field.Origin.Operation != configkit.ChangeDerivedDefault {
+		t.Fatalf("queue capacity default was not recorded: %+v", field)
+	}
+	field, found = loaded.result.Metadata().Lookup(configkit.Keys("backends").Index(0).Key("concurrency_limit"))
+	if !found || field.Origin.Operation == configkit.ChangeNormalization || field.Origin.Operation == configkit.ChangeDerivedDefault {
+		t.Fatalf("unchanged concurrency acquired a resolution record: %+v", field)
+	}
 }

 func TestLoadBackendSmokeTestsOmissionAndNull(t *testing.T) {
@@ -711,7 +763,7 @@ func TestLoadDefaultsAbsentQueueCapacity(t *testing.T) {
 		t.Fatal(err)
 	}
 	backend, err := loaded.GetBackend("local")
-	if err != nil || backend.APIKeyEnv != "" || backend.QueueCapacity != 1024 || loaded.result.Config.Backends[0].QueueCapacity != nil || loaded.backends["local"]["queue_capacity"] != fieldAbsent {
+	if err != nil || backend.APIKeyEnv != "" || backend.QueueCapacity != 1024 || loaded.result.Config.Backends[0].QueueCapacity == nil || *loaded.result.Config.Backends[0].QueueCapacity != 1024 || loaded.backends["local"]["queue_capacity"] != fieldAbsent {
 		t.Fatalf("absent queue capacity did not receive its default: %+v", backend)
 	}
 }
--- a/internal/configuration/prompts.go
+++ b/internal/configuration/prompts.go
@@ -28,44 +28,6 @@ type promptEntry struct {
 	messages          []*template.Template
 }

-func interpretPrompts(source []promptConfig) []promptConfig {
-	if source == nil {
-		return nil
-	}
-	prompts := append([]promptConfig{}, source...)
-	for index := range prompts {
-		definition := &prompts[index]
-		for _, value := range []**string{&definition.Description, &definition.SessionID} {
-			if *value != nil {
-				normalized := strings.TrimSpace(**value)
-				*value = &normalized
-			}
-		}
-		if definition.Inputs != nil {
-			definition.Inputs = append([]promptInputConfig{}, definition.Inputs...)
-			for index := range definition.Inputs {
-				input := &definition.Inputs[index]
-				input.Name = strings.TrimSpace(input.Name)
-				for _, value := range []**string{&input.ContentType, &input.Description} {
-					if *value != nil {
-						normalized := strings.TrimSpace(**value)
-						*value = &normalized
-					}
-				}
-			}
-		}
-		if definition.Output != nil {
-			output := *definition.Output
-			definition.Output = &output
-			if output.SchemaPath != nil {
-				normalized := strings.TrimSpace(*output.SchemaPath)
-				output.SchemaPath = &normalized
-			}
-		}
-	}
-	return prompts
-}
-
 func (state *loaded) materializePrompts() error {
 	state.prompts = make(map[string]*promptEntry)
 	var metadata *configkit.Metadata
@@ -76,7 +38,7 @@ func (state *loaded) materializePrompts() error {
 		}
 		return metadata.Lookup(path)
 	}
-	for _, resources := range resourceSets(&state.interpreted) {
+	for _, resources := range resourceSets(&state.result.Config) {
 		for index, raw := range resources.prompts {
 			promptBase := resources.bases.prompts.Index(index)
 			if strings.TrimSpace(raw.ID) == "" {
@@ -152,8 +114,7 @@ func (state *loaded) materializePrompt(id string, raw promptConfig, base configk
 		if message.Role == nil {
 			return nil, fmt.Errorf("%s: role is required", path.Key("role"))
 		}
-		role, err := domain.NormalizeMessageRole(*message.Role)
-		if err != nil {
+		if _, err := domain.NormalizeMessageRole(*message.Role); err != nil {
 			return nil, fmt.Errorf("%s: %w", path.Key("role"), err)
 		}
 		if (message.Content != nil) == (message.ContentFile != nil) {
@@ -178,9 +139,7 @@ func (state *loaded) materializePrompt(id string, raw promptConfig, base configk
 			if message.CacheControl.TTL != nil {
 				control.TTL = *message.CacheControl.TTL
 			}
-			var err error
-			control, err = domain.NormalizeCacheControl(control)
-			if err != nil {
+			if _, err := domain.NormalizeCacheControl(control); err != nil {
 				return nil, fmt.Errorf("%s: %w", path.Key("cache_control"), err)
 			}
 		}
@@ -190,7 +149,7 @@ func (state *loaded) materializePrompt(id string, raw promptConfig, base configk
 		}
 		entry.messages = append(entry.messages, compiled)
 		definition.Templates = append(definition.Templates, domain.PromptMessageTemplate{
-			Role: role, Content: content, CacheControl: control,
+			Role: *message.Role, Content: content, CacheControl: control,
 		})
 	}
 	if raw.Output == nil {
--- a/internal/configuration/prompts_test.go
+++ b/internal/configuration/prompts_test.go
@@ -16,7 +16,7 @@ import (

 func TestLoadCapturesInheritedImportedContent(t *testing.T) {
 	files := fstest.MapFS{
-		"app/main.yaml":         {Data: []byte("config:\n  imports:\n    - path: ../catalog/base.yaml\n      required: true\ncollections:\n  docs:\n    prompts:\n      - id: child\n        extends: {id: base}\n  other:\n    prompts:\n      - id: child\n        messages:\n          - role: user\n            content_file: ./body.md\n        output:\n          format: text\n          validation_mode: none\n")},
+		"app/main.yaml":         {Data: []byte("config:\n  imports:\n    - path: ../catalog/base.yaml\n      required: true\ncollections:\n  docs:\n    prompts:\n      - id: child\n        extends: {id: base}\n        description: ' description '\n  other:\n    prompts:\n      - id: child\n        messages:\n          - role: user\n            content_file: ./body.md\n        output:\n          format: text\n          validation_mode: none\n")},
 		"app/body.md":           {Data: []byte("Replacement {{.name}}")},
 		"catalog/base.yaml":     {Data: []byte("collections:\n  docs:\n    release_version: r1\n    prompts:\n      - id: base\n        description: ' description '\n        session_id: ' session '\n        inputs:\n          - name: ' document '\n            content_type: ' text/plain '\n            description: ' document source '\n        messages:\n          - role: ' USER '\n            cache_control:\n              type: ' ephemeral '\n              ttl: ' 1h '\n            content_file: ./body.md\n        output:\n          format: text\n          validation_mode: basic\n")},
 		"catalog/body.md":       {Data: []byte("Captured {{.name}}")},
@@ -60,9 +60,9 @@ func TestLoadCapturesInheritedImportedContent(t *testing.T) {
 		t.Fatal("inherited prompt missing from effective list")
 	}
 	composed := state.result.Config.Collections["docs"].Prompts[childIndex]
-	if *composed.Description != " description " || *composed.SessionID != " session " || composed.Inputs[0].Name != " document " ||
-		*composed.Inputs[0].ContentType != " text/plain " || *composed.Inputs[0].Description != " document source " {
-		t.Fatalf("composed metadata was changed: %+v", composed)
+	if *composed.Description != "description" || *composed.SessionID != "session" || composed.Inputs[0].Name != "document" ||
+		*composed.Inputs[0].ContentType != "text/plain" || *composed.Inputs[0].Description != "document source" {
+		t.Fatalf("resolved metadata was not normalized: %+v", composed)
 	}
 	field, ok := state.result.Metadata().Lookup(configkit.Keys("collections", "docs", "prompts").Index(childIndex).Key("messages").Index(0).Key("content_file"))
 	if !ok || len(field.Origin.Locations) != 1 {
--- a/internal/configuration/resolve_prompts.go
+++ b/internal/configuration/resolve_prompts.go
@@ -0,0 +1,68 @@
+package configuration
+
+import (
+	"strings"
+
+	"go.maximumdirect.net/configkit"
+	"go.maximumdirect.net/promptkit/internal/domain"
+)
+
+func resolvePrompts(entries []promptConfig, base configkit.Path, resolution *configkit.Resolution) {
+	if !eligibleResourceList(entries, func(v promptConfig) string { return v.ID }) {
+		return
+	}
+	for i := range entries {
+		entry := &entries[i]
+		path := base.Index(i)
+		for _, field := range []struct {
+			value **string
+			name  string
+		}{{&entry.Description, "description"}, {&entry.SessionID, "session_id"}} {
+			if *field.value != nil {
+				recordStringNormalization(field.value, path.Key(field.name), resolution, strings.TrimSpace(**field.value))
+			}
+		}
+		for j := range entry.Inputs {
+			input := &entry.Inputs[j]
+			inputPath := path.Key("inputs").Index(j)
+			if normalized := strings.TrimSpace(input.Name); normalized != input.Name {
+				configkit.Normalize(resolution, inputPath.Key("name"), &input.Name, normalized, "Normalize input name")
+			}
+			for _, field := range []struct {
+				value **string
+				name  string
+			}{{&input.ContentType, "content_type"}, {&input.Description, "description"}} {
+				if *field.value != nil {
+					recordStringNormalization(field.value, inputPath.Key(field.name), resolution, strings.TrimSpace(**field.value))
+				}
+			}
+		}
+		if entry.Output != nil && entry.Output.SchemaPath != nil {
+			recordStringNormalization(&entry.Output.SchemaPath, path.Key("output").Key("schema_path"), resolution, strings.TrimSpace(*entry.Output.SchemaPath))
+		}
+		for j := range entry.Messages {
+			message := &entry.Messages[j]
+			messagePath := path.Key("messages").Index(j)
+			if message.Role != nil {
+				if value, err := domain.NormalizeMessageRole(*message.Role); err == nil {
+					recordStringNormalization(&message.Role, messagePath.Key("role"), resolution, value)
+				}
+			}
+			if message.CacheControl == nil || message.CacheControl.Type == nil {
+				continue
+			}
+			cache := message.CacheControl
+			control := &domain.CacheControl{Type: domain.CacheControlType(*cache.Type)}
+			if cache.TTL != nil {
+				control.TTL = *cache.TTL
+			}
+			if normalized, err := domain.NormalizeCacheControl(control); err == nil {
+				cachePath := messagePath.Key("cache_control")
+				recordStringNormalization(&cache.Type, cachePath.Key("type"), resolution, string(normalized.Type))
+				if cache.TTL != nil {
+					recordStringNormalization(&cache.TTL, cachePath.Key("ttl"), resolution, normalized.TTL)
+				}
+			}
+		}
+	}
+}
--- a/internal/configuration/resolve_targets.go
+++ b/internal/configuration/resolve_targets.go
@@ -0,0 +1,102 @@
+package configuration
+
+import (
+	"net/http"
+	"strings"
+
+	"go.maximumdirect.net/configkit"
+	"go.maximumdirect.net/promptkit/internal/domain"
+)
+
+func resolveBackends(entries []backendConfig, base configkit.Path, resolution *configkit.Resolution) {
+	if !eligibleResourceList(entries, func(v backendConfig) string { return v.ID }) {
+		return
+	}
+	for i := range entries {
+		entry := &entries[i]
+		path := base.Index(i)
+		if entry.Endpoint != nil {
+			if normalized, err := domain.NormalizeOpenAICompatibleBaseEndpoint(*entry.Endpoint); err == nil {
+				recordStringNormalization(&entry.Endpoint, path.Key("endpoint"), resolution, normalized)
+			}
+		}
+		if entry.APIKeyEnv != nil {
+			recordStringNormalization(&entry.APIKeyEnv, path.Key("api_key_env"), resolution, strings.TrimSpace(*entry.APIKeyEnv))
+		}
+		if entry.ConcurrencyLimit != nil && *entry.ConcurrencyLimit > 0 && entry.QueueCapacity == nil {
+			capacity := 1024
+			entry.QueueCapacity = &capacity
+			resolution.RecordDerivedDefault(path.Key("queue_capacity"), "Derive queue capacity", path.Key("concurrency_limit"))
+		}
+		if entry.SmokeTests == nil {
+			continue
+		}
+		smoke := entry.SmokeTests
+		smokePath := path.Key("smoke_tests")
+		if smoke.Reachability != nil {
+			resolveDiagnosticEndpoint(&smoke.Reachability.Endpoint, smokePath.Key("reachability").Key("endpoint"), resolution)
+		}
+		if smoke.Authentication != nil {
+			auth := smoke.Authentication
+			authPath := smokePath.Key("authentication")
+			if auth.Kind != nil {
+				recordStringNormalization(&auth.Kind, authPath.Key("kind"), resolution, strings.ToLower(strings.TrimSpace(*auth.Kind)))
+			}
+			resolveDiagnosticEndpoint(&auth.Endpoint, authPath.Key("endpoint"), resolution)
+		}
+	}
+}
+
+func diagnosticEndpointValid(value string) bool {
+	normalized := strings.TrimSpace(value)
+	request, err := http.NewRequest(http.MethodGet, normalized, nil)
+	return normalized != "" && err == nil && request.URL != nil && (strings.EqualFold(request.URL.Scheme, "http") || strings.EqualFold(request.URL.Scheme, "https")) && request.URL.Hostname() != ""
+}
+
+func validateBackendEndpoints(entry backendConfig, path configkit.Path, validation *configkit.Validation) {
+	if entry.Endpoint != nil {
+		if _, err := domain.NormalizeOpenAICompatibleBaseEndpoint(*entry.Endpoint); err != nil {
+			validation.Error(path.Key("endpoint"), err.Error())
+		}
+	}
+	if entry.SmokeTests == nil {
+		return
+	}
+	smoke := entry.SmokeTests
+	path = path.Key("smoke_tests")
+	if smoke.Reachability != nil && smoke.Reachability.Endpoint != nil && !diagnosticEndpointValid(*smoke.Reachability.Endpoint) {
+		validation.Error(path.Key("reachability").Key("endpoint"), "diagnostic endpoint must be an absolute HTTP(S) URL with a host")
+	}
+	if smoke.Authentication != nil && smoke.Authentication.Endpoint != nil && !diagnosticEndpointValid(*smoke.Authentication.Endpoint) {
+		validation.Error(path.Key("authentication").Key("endpoint"), "diagnostic endpoint must be an absolute HTTP(S) URL with a host")
+	}
+}
+
+func resolveDiagnosticEndpoint(value **string, path configkit.Path, resolution *configkit.Resolution) {
+	if *value != nil && diagnosticEndpointValid(**value) {
+		recordStringNormalization(value, path, resolution, strings.TrimSpace(**value))
+	}
+}
+
+func resolveProfiles(entries []profileConfig, base configkit.Path, resolution *configkit.Resolution) {
+	if !eligibleResourceList(entries, func(v profileConfig) string { return v.ID }) {
+		return
+	}
+	for i := range entries {
+		entry := &entries[i]
+		path := base.Index(i)
+		if entry.Endpoint != nil && *entry.Endpoint != "" {
+			if normalized, err := domain.NormalizeOpenAICompatibleBaseEndpoint(*entry.Endpoint); err == nil {
+				recordStringNormalization(&entry.Endpoint, path.Key("endpoint"), resolution, normalized)
+			}
+		}
+		for _, field := range []struct {
+			value **string
+			name  string
+		}{{&entry.ServiceTier, "service_tier"}, {&entry.ReasoningEffort, "reasoning_effort"}, {&entry.APIKeyEnv, "api_key_env"}} {
+			if *field.value != nil {
+				recordStringNormalization(field.value, path.Key(field.name), resolution, strings.TrimSpace(**field.value))
+			}
+		}
+	}
+}
--- a/internal/configuration/targets.go
+++ b/internal/configuration/targets.go
@@ -12,8 +12,8 @@ import (
 )

 func (state *loaded) buildExecutionProfiles() error {
-	backendConfigs := indexedBackends(&state.interpreted)
-	profileConfigs := indexedProfiles(&state.interpreted)
+	backendConfigs := indexedBackends(&state.result.Config)
+	profileConfigs := indexedProfiles(&state.result.Config)
 	definitions := make(map[string]domain.Backend, len(backendConfigs))
 	for _, id := range sortedKeys(backendConfigs) {
 		config := backendConfigs[id]
--- a/internal/engine/engine.go
+++ b/internal/engine/engine.go
@@ -41,13 +41,17 @@ type ConfigurationSources struct {

 // Options collects construction choices from the public facade.
 type Options struct {
-	llmClient       llm.Client
-	artifactReader  artifact.Reader
-	validator       validate.Validator
-	validatorSource bool
-	artifactSource  bool
+	llmClient                llm.Client
+	artifactReader           artifact.Reader
+	validator                validate.Validator
+	validatorSource          bool
+	artifactSource           bool
+	disableBundledOpenRouter bool
 }

+// SetBundledOpenRouter selects whether the built-in OpenRouter source is installed.
+func (o *Options) SetBundledOpenRouter(enabled bool) { o.disableBundledOpenRouter = !enabled }
+
 // SetLLMClient selects the client collaborator for one engine.
 func (o *Options) SetLLMClient(client llm.Client) { o.llmClient = client }

@@ -124,6 +128,11 @@ func New(cfg Config, options Options) (*Engine, error) {
 		return nil, err
 	}
 	underlays := cfg.Sources.Underlays
+	if !options.disableBundledOpenRouter {
+		underlays = make([]configkit.Underlay, 1, len(cfg.Sources.Underlays)+1)
+		underlays[0] = configuration.BundledOpenRouterUnderlay()
+		underlays = append(underlays, cfg.Sources.Underlays...)
+	}
 	main := configkit.Input{Source: configkit.NoSource()}
 	if cfg.Sources.Main != nil {
 		main = *cfg.Sources.Main
--- a/listing_contract_test.go
+++ b/listing_contract_test.go
@@ -226,7 +226,7 @@ func newNamespaceListingEngine(t *testing.T) *promptkit.Engine {
 		"profiles": []any{map[string]any{"id": "root-profile", "backend": "root-backend", "model": "root-model"}},
 		"prompts":  []any{listingContractPrompt("root-prompt")},
 	})}
-	engine, err := promptkit.NewEngine(promptkit.Config{Sources: promptkit.ConfigurationSources{Main: &input}})
+	engine, err := promptkit.NewEngine(promptkit.Config{Sources: promptkit.ConfigurationSources{Main: &input}}, promptkit.WithBundledOpenRouter(false))
 	if err != nil {
 		var loadErr *configkit.LoadError
 		if errors.As(err, &loadErr) {
@@ -464,7 +464,7 @@ func TestListIdentitiesUseEffectiveLayeredMembership(t *testing.T) {
 }

 func TestListIdentitiesEmptyEffectiveConfiguration(t *testing.T) {
-	engine, err := promptkit.NewEngine(promptkit.Config{})
+	engine, err := promptkit.NewEngine(promptkit.Config{}, promptkit.WithBundledOpenRouter(false))
 	if err != nil {
 		t.Fatal(err)
 	}
--- a/sources_contract_test.go
+++ b/sources_contract_test.go
@@ -23,7 +23,7 @@ func TestProgrammaticSourcesPreserveOrderAndRejectDuplicates(t *testing.T) {
 	params["visible"] = "changed"
 	engine, err := promptkit.NewEngine(promptkit.Config{Sources: promptkit.ConfigurationSources{
 		Underlays: []configkit.Underlay{{Inputs: []configkit.Input{{Source: backendSource}, {Source: profileSource}}}},
-	}})
+	}}, promptkit.WithBundledOpenRouter(false))
 	if err != nil {
 		t.Fatal(err)
 	}
Author	SHA1	Message	Date
Eric Rakestraw	d9f6aad305	Adopt ReleaseKit v0.9.0 and refresh recovery guidance	2026-11-04 02:10:48 +00:00
Eric Rakestraw	fda0338134	Finalize v0.18.0 notes and retire completed plans	2026-11-04 00:33:44 +00:00
Eric Rakestraw	2b3d165ce2	Document the bundled OpenRouter configuration	2026-11-03 15:39:04 +00:00
Eric Rakestraw	43f55edb98	Test bundled OpenRouter smoke diagnostics	2026-11-03 15:36:26 +00:00
Eric Rakestraw	4950e1dee2	Test bundled profile request construction	2026-11-03 15:34:10 +00:00
Eric Rakestraw	d240364776	Test bundled configuration composition	2026-11-03 15:32:25 +00:00
Eric Rakestraw	6f57f2f30a	Enable bundled OpenRouter configuration by default	2026-11-03 15:30:47 +00:00
Eric Rakestraw	2c50eca033	Add embedded OpenRouter configuration	2026-11-03 15:27:26 +00:00
Eric Rakestraw	ac44a4f325	Plan bundled OpenRouter configuration	2026-11-03 15:24:06 +00:00
Eric Rakestraw	9e05c3ac8b	Clarify bundled profile composition and compatibility	2026-11-03 15:11:45 +00:00
Eric Rakestraw	2c83925c88	Plan inherited auto-router cost-tier profiles	2026-11-03 14:48:19 +00:00
Eric Rakestraw	e0cd63923d	Set bundled OpenRouter smoke-test defaults	2026-11-03 14:40:58 +00:00
Eric Rakestraw	75204d6134	Set root identities and expand bundled profile plan	2026-11-03 14:26:50 +00:00
Eric Rakestraw	5ce6e01f27	Plan bundled OpenRouter backend and profiles	2026-11-03 13:11:54 +00:00
Eric Rakestraw	5cec25a40c	Prepare v0.18.0 release documentation	2026-11-03 12:50:19 +00:00
Eric Rakestraw	855aae6daa	Document recorded configuration normalization	2026-11-03 03:32:59 +00:00
Eric Rakestraw	43abbcb414	Test normalized configuration inspection and provenance	2026-11-03 03:31:37 +00:00
Eric Rakestraw	9f33fed823	Use resolved configuration for construction	2026-11-03 03:29:41 +00:00
Eric Rakestraw	7a98feb399	Record prompt field normalization	2026-11-03 03:28:31 +00:00
Eric Rakestraw	626134e5e1	Record backend and profile normalization	2026-11-03 03:27:17 +00:00
Eric Rakestraw	e7ed315671	Update ConfigKit to version 1.1.0	2026-11-03 03:24:54 +00:00
Eric Rakestraw	d7d9a7dd65	Target normalization release notes at v0.18.0	2026-11-03 03:23:28 +00:00
Eric Rakestraw	18f6a474e0	Plan recorded field normalization	2026-11-03 03:17:55 +00:00
Eric Rakestraw	fb7ebe6a6c	Plan field-level configuration normalization	2026-11-03 03:10:04 +00:00