Add integrated sequence catalog examples

docs/roadmap/implementation.md

@@ -1,6 +1,6 @@
 # Sequence Identity And Combination Implementation Plan
 
-Status: implementation in progress; Stages 1–27 complete.
+Status: implementation in progress; Stages 1–28 complete.
 
 Audience: a Luna coding agent implementing one numbered stage per prompt, in
 order. This plan starts at commit
@@ -948,6 +948,23 @@ Scope: a small number of meaningful integrations, not a Cartesian test matrix.
 Validation: `go test ./examples/consumers`, focused root integration tests,
 `go test -race ./...`, and the everyday check.
 
+**Completion:** Added an executable source-backed catalog that combines an
+underlay identity declaration, imported main fragments, identified record
+inheritance, all three selected overlay operations, typed CLI assignment, and
+recorded application resolution. Its checks demonstrate stable operation order,
+complete matched-record replacement, final metadata and history inspection,
+inherited resource lookup through source context, and secret-safe explanation.
+Added a typed-map example with exact and wildcard registrations, independent
+uniqueness across concrete collections, and a YAML-only identity example that
+shows the absence of final application enforcement without registration. Audited
+the existing helper-composed parent reference, source-version control consumption,
+pending declarations, lower-tier identity before peer composition, and policy
+replacement ownership coverage; added a consumer regression for a dynamic
+collection destination introduced by inheritance. Verified
+`go test ./examples/consumers -count=1`,
+`go test . -run 'Facade.*(Inheritance|Sequence|Override)' -count=1`,
+`go test -race ./...`, and `./scripts/check.sh`.
+
 ## Stage 29 — Reconcile Documentation
 
 Scope: finish the current-contract narrative. Code cleanup belongs with the