Adds the markdown shadows for stories filed during today's stress-test
session, plus a SESSION_HANDOFF document for picking up the work in
a future session.
New stories (510-521):
510 — bug: stale 1_backlog filesystem shadows get re-promoted by timers
511 — bug: CRDT lamport clock resets to 1 on restart (FIXED in 99557635)
512 — story: migrate chat commands from filesystem lookup to CRDT/DB
513 — story: startup reconcile pass for state-machine drift detection
514 — story: delete_story should do a full cleanup
515 — story: debug MCP tool to dump in-memory CRDT state
516 — story: update_story.description should create the section if missing
517 — story: remove filesystem-shadow fallback paths from lifecycle.rs
518 — story: apply_and_persist should log persist_tx send failures
519 — story: mergemaster should fail loudly on no-op merges (mostly
obviated by Stage::Merge { commits_ahead: NonZeroU32 } in 520)
520 — story: typed pipeline state machine in Rust (sketches added in f7d69cde)
521 — story: MCP capability to write a CRDT tombstone for a story
Refactor 436 (unify story stuck states) is marked superseded by 520
via front_matter — its functionality is now part of the
Stage::Archived { reason: ArchiveReason } enum in story 520's design.
The SESSION_HANDOFF_2026-04-09.md document captures: the four-state-machine
drift situation that motivated story 520, today's bug fixes (502 + 511),
the off-leash rogue commit incident (forensic tag rogue-commit-2026-04-09-ac9f3ecf
preserved), the recommended next-session priority order, and useful
diagnostic recipes.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Timmy