Document PromptKit requirements discovery

docs/roadmap/implementation.md

@@ -1,6 +1,6 @@
 # Implement PromptKit requirements inspection
 
-Status: in progress; Stages 1 through 5 are complete.
+Status: in progress; Stages 1 through 6 are complete.
 
 ## Authority and working rules
 
@@ -423,6 +423,21 @@ Historical release notes and pinned retired plans remain historical evidence;
 do not rewrite them as current reference pages. Current canonical docs must not
 depend on this temporary plan for their implemented contracts.
 
+**Completed:** Updated the exported API comments in
+`integrations/ckprompt/adapters.go`, `command.go`, and `doc.go`; the command and
+report contract in `docs/cli.md`; optional callback guidance in
+`docs/consumers/guide.md`; module, root, internal, and contributor summaries;
+and the composed example README. Removed the delivered capability from
+`docs/roadmap/deferred.md` and updated
+`docs/roadmap/requirements.md` to describe its historical baseline and point to
+the immutable commit that contains the prior deferral. The two example commands
+and their semantics match the Stage 5 test and observed output. `gofmt -w
+integrations/ckprompt/adapters.go integrations/ckprompt/command.go
+integrations/ckprompt/doc.go` and `git diff --check -- '*.md' COPYRIGHT` passed.
+A local link and fragment check across nine changed Markdown documents passed;
+the stale four-callback and deferred-requirement claim search found no current
+documentation claims. No material limitations were encountered.
+
 ## Stage 7: Validate the final module boundaries and complete the sprint
 
 **Outcome:** the implemented feature works with its committed dependency graph,