Document shared source version checks

docs/roadmap/implementation.md

@@ -1,6 +1,6 @@
 # Implement shared source version checks
 
-Status: Stages 1–13 complete; documentation reconciliation remains.
+Status: complete. All 14 implementation stages are validated.
 
 Audience: a Luna coding agent implementing one numbered stage per prompt, in
 order. The [feature roadmap](source-version-checks.md) owns target behavior and
@@ -668,3 +668,27 @@ No environmental limitation affected validation; checks ran on Linux/amd64.
 
 Done: implementation, coverage, documentation, and approved scope agree. No
 product questions remain open under the roadmap and concrete decisions above.
+
+Completion evidence: updated the public Go comments, configuration contract,
+consumer guidance, development guide, and component ownership summary for the
+implemented behavior. Reconciled the original source-version request with later
+accepted decisions, marked the source-version roadmap implemented, and repaired
+relative-import/remediation references to the overwritten plan using the
+confirmed `d9f08ff:docs/roadmap/implementation.md` history pointer. The scope
+audit found no default-mode expansion, equality/non-null rule, extra path
+restriction, fragment decoding, callback-order promise, new uniqueness/cap,
+unsafe evidence query, or release gate. Reviewed behavioral coverage in
+`internal/engine/source_version_test.go`,
+`facade_source_version_mode_test.go`,
+`internal/engine/secret_classification_test.go`,
+`internal/engine/inheritance_secret_test.go`, and
+`examples/consumers/layered_test.go`. These checks passed with Go
+`go1.26.8 linux/amd64`:
+
+- `GOTOOLCHAIN=local ./scripts/check.sh`
+- `GOTOOLCHAIN=local GOPROXY=off go test . -run '^TestLocalDocumentationLinks$' -count=1`
+- `git diff --check`
+
+No runtime code changed in this documentation unit, so the race suite was not
+rerun. No environmental limitation affected validation; checks ran on
+Linux/amd64 only. Publication and release preparation remain outside this work.