Prepare resolution entry provenance view

docs/roadmap/implementation.md

@@ -81,7 +81,7 @@ performance guarantees, resource caps, or benchmark gates.
 
 ## Stage 1 — Factor reusable effective-path indexing
 
-Status: not started. Dependencies: none.
+Status: complete (2026-09-12). Dependencies: none.
 
 Scope: `metadata.go`, `load_metadata.go`, and their focused test owners.
 
@@ -110,6 +110,17 @@ No public API or configuration contract changes are claimed by this stage.
 Validation: `go test . -run 'Metadata|Path|Provenance|Historical'`, then the everyday
 checker. Handoff should identify the helper and constructor signatures for Stage 2.
 
+Completion record (2026-09-12): extracted `effectivePathIndex(final)` from final
+metadata publication and introduced `newResolutionInput(metadata, final, sources)`.
+The private view owns cloned metadata/source records, indexes source IDs, and exposes
+private detached lookup helpers for the next step; it intentionally has no public API
+or load-lifecycle wiring yet. `TestResolutionInputKeepsDetachedEntryMetadata` covers
+root, defaults, explicit null, missing descendants, escaped keys, contextual parsed
+sequence indices, key/index mismatches, detached records, and stability after real
+recorded resolution. `go test . -run 'Metadata|Path|Provenance|Historical'` and
+`./scripts/check.sh` passed with Go 1.26.7 on Linux. No deviations or remaining
+Stage 1 risks were identified.
+
 ## Stage 2 — Wire the callback API and enforce lifetime
 
 Status: not started. Dependencies: Stage 1.