Repair the beta.2 validation candidate at its owning boundaries:
- fail closed on conflicting approval channels and keep transient Slack member events retryable;
- tolerate sparse assistant usage history and align QA/release-only evidence with current runtime contracts;
- remove package/Docker harness dependency leaks and assert the installed `tsx` launcher path.
Verified by exact-head CI, focused QA/plugin/package Testboxes, full release preflight, clean Codex autoreview, and exact-head ClawSweeper review with no actionable findings or security concerns.
Peter Steinberger
0a848362fd