### Added

- The issue sweep now echoes an issue's parsed `Blocked by` set as a comment
  whenever that set changes, so a readable-but-wrong declaration is visible in
  one sweep instead of days later, when a human happens to run the parser by
  hand (#252).
- The echo's marker carries the parsed set itself: an unchanged parse never
  re-posts on a 15-minute cron, and a changed one always speaks. Comment-only
  — no path here writes a label (#252).