diff --git a/docs/internal/configuration.md b/docs/internal/configuration.md
index 0f3b8c2c..3cbbfb09 100644
--- a/docs/internal/configuration.md
+++ b/docs/internal/configuration.md
@@ -15,7 +15,7 @@ runs anything.
 
 | Boundary | Inputs | Outputs | Does not own |
 | --- | --- | --- | --- |
-| Loading | Selected file path, profile, overrides, and invocation directory | **LoadedConfig** with ConfigKit inspection metadata and a populated **Config** | Choosing the file path or reporting a command result. |
+| Loading | Selected file path, overlay, overrides, and invocation directory | **LoadedConfig** with ConfigKit inspection metadata and a populated **Config** | Choosing the file path or reporting a command result. |
 | Validation | **Config** | Structural configuration errors with pipeline, lane, or binding context | Module availability, capabilities, or construction. |
 | Resolution | Valid **Config**, selected pipeline and lanes, runtime reference changes, LLM override, and module catalog | **EffectiveConfig** with a **ResolvedPipeline** | Materializing reference bytes, preparing modules, execution, or filesystem state. |
 | Inspection | **LoadedConfig** and an optional JSON Pointer | Redacted effective YAML or explanation text | Pipeline selection, module preparation, or provider work. |
@@ -34,7 +34,15 @@ inheritance before typed decoding. The document definition supplies typed
 defaults and structural validation; Notarius's recorded resolution changes
 normalize configured paths after decode. Path normalization follows the source
 of the surviving value, including a value copied through inheritance, rather
-than the inheritance directive's location. Only
+than the inheritance directive's location. Inherited input remains explicit
+for presence-sensitive behavior, including zero, false, and empty values;
+existing field validation still governs whether the resulting values are valid.
+ConfigKit's inspection history retains inheritance transfers alongside later
+normalization, and effective configuration renders the normalized values used
+by runtime conversion. The private typed document consumes the directive, so
+no upstream inheritance type or unresolved directive reaches runtime pipeline
+or module contracts. See [Configuration](../config.md#sibling-inheritance)
+for the operator syntax and field rules. Only
 `NOTARIUS_CONFIG` participates in discovery; retired field-level environment
 variables do not participate in loading. Version 5 decoding rejects scalar
 module bindings and scalar external references. ConfigKit retains redacted,
diff --git a/docs/roadmap/implementation.md b/docs/roadmap/implementation.md
index 62761b4a..7c25b392 100644
--- a/docs/roadmap/implementation.md
+++ b/docs/roadmap/implementation.md
@@ -286,6 +286,8 @@ Inspection rendering is checked separately in Stage 5.
 
 ## Stage 5 — Preserve Inspection, Derivation, And Ownership
 
+> Completion: complete.
+
 Goal: prove inherited configuration remains correctly inspectable after
 Notarius's recorded normalization and runtime conversion.
 
diff --git a/internal/core/config/inheritance_test.go b/internal/core/config/inheritance_test.go
index efa91f67..fde19fe6 100644
--- a/internal/core/config/inheritance_test.go
+++ b/internal/core/config/inheritance_test.go
@@ -1,9 +1,11 @@
 package config
 
 import (
+	"bytes"
 	"errors"
 	"os"
 	"path/filepath"
+	"strings"
 	"testing"
 
 	configkit "gitea.maximumdirect.net/eric/ConfigKit"
@@ -433,3 +435,175 @@ configkit:
 		t.Errorf("overlaid inherited step reference path = %q, want %q", got, want)
 	}
 }
+
+func TestInheritedInspectionRetainsOriginsRedactionAndOwnership(t *testing.T) {
+	t.Parallel()
+
+	root := t.TempDir()
+	parentDirectory := filepath.Join(root, "parents")
+	childDirectory := filepath.Join(root, "children")
+	overlayDirectory := filepath.Join(root, "overlays")
+	for _, directory := range []string{parentDirectory, childDirectory, overlayDirectory} {
+		if err := os.MkdirAll(directory, 0o700); err != nil {
+			t.Fatal(err)
+		}
+	}
+	parentFile := filepath.Join(parentDirectory, "pipelines.yml")
+	if err := os.WriteFile(parentFile, []byte(`pipelines:
+  parent:
+    input: {module: input}
+    structured_output_repair_attempts: 2
+    references:
+      source: {path: ./shared.txt}
+    artifacts:
+      summary:
+        extract:
+          module: extract
+          options:
+            nested: {value: original}
+            credentials: {api_key: fake-parent-secret}
+`), 0o600); err != nil {
+		t.Fatal(err)
+	}
+	if err := os.WriteFile(filepath.Join(parentDirectory, "shared.txt"), []byte("source\n"), 0o600); err != nil {
+		t.Fatal(err)
+	}
+	childFile := filepath.Join(childDirectory, "pipelines.yml")
+	if err := os.WriteFile(childFile, []byte(`pipelines:
+  child:
+    extends: parent
+    structured_output_repair_attempts: 0
+`), 0o600); err != nil {
+		t.Fatal(err)
+	}
+	main := filepath.Join(root, "notarius.yml")
+	if err := os.WriteFile(main, []byte(`version: 5
+configkit:
+  imports:
+    - path: parents/pipelines.yml
+    - path: children/pipelines.yml
+`), 0o600); err != nil {
+		t.Fatal(err)
+	}
+	if err := os.WriteFile(filepath.Join(overlayDirectory, "development.yml"), []byte(`pipelines:
+  parent:
+    artifacts:
+      summary:
+        extract:
+          options:
+            credentials: {api_key: fake-overlay-secret}
+`), 0o600); err != nil {
+		t.Fatal(err)
+	}
+
+	loaded, err := Load(main, LoadOptions{Overlay: "development"})
+	if err != nil {
+		t.Fatalf("Load() error = %v", err)
+	}
+	child := loaded.Config.Pipelines["child"]
+	wantPath := filepath.Join(parentDirectory, "shared.txt")
+	if got := child.References["source"].Path; got != wantPath {
+		t.Fatalf("runtime inherited path = %q, want %q", got, wantPath)
+	}
+	if child.StructuredOutputRepairAttempts == nil || *child.StructuredOutputRepairAttempts != 0 {
+		t.Fatalf("runtime inherited repair setting = %#v", child.StructuredOutputRepairAttempts)
+	}
+
+	var effective bytes.Buffer
+	if err := loaded.WriteEffective(&effective); err != nil {
+		t.Fatalf("WriteEffective() error = %v", err)
+	}
+	if !strings.Contains(effective.String(), wantPath) || strings.Contains(effective.String(), "extends:") ||
+		!strings.Contains(effective.String(), "structured_output_repair_attempts: 0") {
+		t.Fatalf("effective configuration is inconsistent with runtime conversion: %s", effective.String())
+	}
+	for _, secret := range []string{"fake-parent-secret", "fake-overlay-secret"} {
+		if strings.Contains(effective.String(), secret) {
+			t.Fatalf("effective configuration exposed %q", secret)
+		}
+	}
+
+	for _, test := range []struct {
+		name string
+		path configkit.Path
+	}{
+		{name: "repair setting", path: configkit.Keys("pipelines", "child", "structured_output_repair_attempts")},
+		{name: "normalized reference", path: configkit.Keys("pipelines", "child", "references", "source", "path")},
+	} {
+		t.Run(test.name, func(t *testing.T) {
+			explanation, ok := loaded.result.Explain(test.path)
+			if !ok || len(explanation.History) == 0 {
+				t.Fatalf("inherited explanation = %#v, found=%v", explanation, ok)
+			}
+			inheritanceFromParent := false
+			for _, change := range explanation.History {
+				if len(change.Origin.Inheritance) == 0 {
+					continue
+				}
+				for _, location := range change.Origin.Locations {
+					for _, source := range loaded.result.Sources() {
+						if source.ID == location.SourceID && source.Path == parentFile {
+							inheritanceFromParent = true
+						}
+					}
+				}
+			}
+			if !inheritanceFromParent {
+				t.Fatalf("inheritance history lacks parent source evidence: %#v", explanation.History)
+			}
+			var rendered bytes.Buffer
+			if err := loaded.WriteExplanation(&rendered, test.path.String()); err != nil {
+				t.Fatalf("WriteExplanation() error = %v", err)
+			}
+			if !strings.Contains(rendered.String(), filepath.ToSlash(filepath.Join("parents", "pipelines.yml"))) {
+				t.Fatalf("explanation lacks parent source evidence: %s", rendered.String())
+			}
+			if test.name == "normalized reference" {
+				foundNormalization := false
+				for _, change := range explanation.History {
+					if change.Origin.Operation == configkit.ChangeNormalization {
+						foundNormalization = true
+					}
+				}
+				if !foundNormalization || !strings.Contains(rendered.String(), wantPath) {
+					t.Fatalf("normalized path evidence = %#v; rendered %s", explanation.History, rendered.String())
+				}
+			}
+		})
+	}
+
+	secretPath := configkit.Keys("pipelines", "child", "artifacts", "summary", "extract", "options", "credentials", "api_key")
+	secretExplanation, ok := loaded.result.Explain(secretPath)
+	if !ok || !secretExplanation.Effective.Redacted {
+		t.Fatalf("inherited secret explanation = %#v, found=%v", secretExplanation, ok)
+	}
+	redactedHistory := false
+	for _, change := range secretExplanation.History {
+		redactedHistory = redactedHistory || change.Before.Redacted || change.After.Redacted
+	}
+	if !redactedHistory {
+		t.Fatalf("secret history was not redacted: %#v", secretExplanation.History)
+	}
+	var secretOutput bytes.Buffer
+	if err := loaded.WriteExplanation(&secretOutput, secretPath.String()); err != nil {
+		t.Fatalf("WriteExplanation(secret) error = %v", err)
+	}
+	if strings.Contains(secretOutput.String(), "fake-parent-secret") || strings.Contains(secretOutput.String(), "fake-overlay-secret") ||
+		!strings.Contains(secretOutput.String(), "[REDACTED]") {
+		t.Fatalf("secret explanation did not redact values and history: %s", secretOutput.String())
+	}
+
+	childOptions := loaded.Config.Pipelines["child"].Artifacts["summary"].Extract.Options
+	childOptions["nested"].(map[string]any)["value"] = "changed"
+	parentValue := loaded.Config.Pipelines["parent"].Artifacts["summary"].Extract.Options["nested"].(map[string]any)["value"]
+	if parentValue != "original" {
+		t.Fatalf("child runtime mutation changed parent value: %#v", parentValue)
+	}
+	var frozen bytes.Buffer
+	if err := loaded.WriteEffective(&frozen); err != nil {
+		t.Fatalf("WriteEffective() after runtime mutation error = %v", err)
+	}
+	if !strings.Contains(frozen.String(), "original") || strings.Contains(frozen.String(), "changed") {
+		t.Fatalf("runtime mutation changed frozen inspection: %s", frozen.String())
+	}
+}