bd delete --hard --force creates tombstones instead of truly deleting,
which blocks agent bead recreation when polecats are respawned with the
same name. The tombstone is invisible to bd show/reopen but still
triggers UNIQUE constraint on create.
Workaround: Use CloseAndClearAgentBead instead of DeleteAgentBead when
cleaning up agent beads. Closed beads can be reopened by
CreateOrReopenAgentBead.
Changes:
- Add CloseAndClearAgentBead() for soft-delete that allows reopen
- Clears mutable fields (hook_bead, active_mr, cleanup_status, agent_state)
in description before closing to emulate delete --force --hard
- Update RemoveWithOptions to use close instead of delete
- Update RepairWorktreeWithOptions similarly
- Add comprehensive tests documenting the bd bug and verifying the workaround
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>