Retire completed roadmaps and preserve release gates

docs/internal/overview.md

@@ -59,7 +59,8 @@ representations private. The implemented components and their owners are:
   `internal/yaml/write.go`;
 - a separate maintained `examples/consumers` package with four sanitized consumer
   shapes, fixtures, domain validators, and runtime-boundary functions; and
-- a fail-fast source-candidate checker in `scripts/release-check.sh`, with local
+- an everyday single-toolchain check in `scripts/check.sh` and a stricter
+  source-candidate checker in `scripts/release-check.sh`, with local
   documentation-link and public import-boundary gates owned by root-package tests.
 
 Dependency direction remains inward: the public lifecycle coordinates private
@@ -82,7 +83,7 @@ implementation:
 - [Extraction inventory](extraction.md)
 
 The [architecture policy](../policy/architecture.md) owns binding boundaries and
-invariants. The [initial target record](../roadmap/initial.md) links current feature
-owners and preserves deferred scope; it is not an implementation inventory. See the
+invariants. The [deferred scope](../roadmap/deferred.md) records deliberate
+exclusions. See the
 [development guide](../development.md) for contributor orientation and validation
 and the [release procedure](../release.md) for source-candidate gates.