### Added

- The issue-flow sweep now flags a collision the board never declared: two
  open, unblocked issues whose titles name one deliverable draw a comment
  naming the newer's owed `Blocked by` edge. Keys normalize, so
  `actions/x` and `x` are one deliverable (#288).
- The sweep now flags an unblocked non-member during a standing release
  window, naming the window's invariant. `claimed` counts, PR in flight or
  not. The gate is read from the release issue's own `Blocked by`
  declarations, and an emptied gate leaves it dormant (#292).
- Both flags are advisory: comments only, no label write and no state
  change, deduped against each family's last word on the thread so a
  standing state re-sweeps silently (#293).