Add the source release launcher

docs/roadmap/implementation.md

@@ -166,7 +166,7 @@ existing library checks pass. Commit the stage before proceeding.
 
 ## Stage 2: implement the source-only publication entry point
 
-**Status:** pending. **Prerequisite:** Stage 1.
+**Status:** complete. **Prerequisite:** Stage 1.
 
 **Files:** root `releasekit.json`, `scripts/release`, `.gitignore`, and stage
 evidence in this plan.
@@ -226,6 +226,15 @@ and verify the executable mode and ignore rule. Exercise zero and multiple
 arguments without a candidate; both return 2 without tool bootstrap. Do not
 invoke a valid version against CommandKit's real repository as a smoke check.
 
+Observed 2026-10-08: reviewed the v0.2.0 profile and CLI references at the
+selected upstream commit. The profile contains only the product, remote, and
+effective push URL. `sh -n scripts/release` and `python3 -m json.tool
+releasekit.json` passed. Git reports the launcher executable, and
+`git check-ignore -v .releasekit/bin/releasekit` matches the root ignore rule.
+Zero and two arguments both printed the required usage line and returned status
+2 with a nonexistent `PATH`, confirming that Go was not invoked; no bootstrap
+directory was created. No valid version was sent to CommandKit's repository.
+
 **Completion:** the profile and launcher match the selected target and delegate
 publication to the module-selected native CLI. Commit the stage.