Clarify completed implementation records and later corrections

docs/roadmap/implementation.md

@@ -1,10 +1,29 @@
 # Initial CommandKit implementation plan
 
-Status: implementation complete; Stages 1-14 complete.
+Status: completed execution record; Stages 1-14 complete.
 
 Date: 2026-10-07.
 
-## Purpose and instructions for the implementation agent
+## Record scope and current owners
+
+The staged instructions and API illustrations below are retained as the record
+of the completed initial implementation. They describe the assignments used to
+produce the [selected feature target](initial.md), not work to restart. The
+[CLI reference](../cli.md) owns current operator behavior, Go declarations and
+GoDoc own current API contracts, the [consumer guide](../consumers/guide.md) owns
+usage guidance, and the [internal overview](../internal/overview.md) owns mechanics.
+
+### Subsequent code remediation
+
+After original stage completion at `85f44cd`, ten code-remediation units were
+committed from `d8db15f` through `cb0b8dd`. They corrected scope-specific required
+selectors, inline YAML framing, cancellation boundaries, help failure delivery,
+validation delivery errors, outcome defaults, nil diagnostic handling, scope
+choices, selector-name collisions, and metadata-only help discovery. These
+corrections are reflected in current code and its regression checks. Original
+stage completion notes remain historical evidence, not a new validation run.
+
+## Historical instructions for the implementation agent
 
 Implement the selected end state in [the feature roadmap](initial.md). Read this
 whole plan before starting. Complete Stage 1, then each subsequent stage in numeric
@@ -778,8 +797,10 @@ func RegisterPromptKit[C any](app *App, suite PromptKitSuite[C]) error
    bookkeeping. Configuration scope installation remains independent.
 3. Accept ID as one required operand. Prompt alone has singleton `--version`
    (default empty). Both accept standard Config/Overlay selection, context-selector
-   bindings, and `--format text|yaml` (text default), plus help. No `--scope` is
-   installed for definition commands. Selector target is `promptkit`; empty Scopes
+   bindings, and `--format text|yaml` (text default), plus help. No built-in configuration-scope selector is
+   installed for definition commands; a custom context selector can use the name
+   `scope` when it does not collide with an installed flag. Selector target is
+   `promptkit`; empty Scopes
    or a list containing promptkit applies, independent of a config scope registry.
    Other explicit targets are miswired metadata at registration.
 4. Reuse Stage 7's input/context creation and input-check rules. Missing ID is