- pytest: restrict collection to vibe's own tests/ via testpaths; the
  vendored wordlib suite is self-contained (own pytest.ini, own deps)
  and would otherwise error during collection in vibe's environment.
- pre-commit: global exclude for mainbrain/ so lint/format/type/typos
  hooks neither fail on nor rewrite vendored code.

Verified: uv run pytest --ignore tests/snapshots --collect-only collects
4995 tests with zero errors; check-toml and trailing-whitespace hooks
pass without touching mainbrain files.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01HbihhqCH3c2tvHn1UjsDPx

…ntime

Top-5 item mistralai#4 was the only thread with no artifact in hand -- the v11
starter zip/wheel referenced by its design record was never present in
any package. This implements the record's durability model as a pure
stdlib package (mainbrain/ether-runtime), fully runnable and testable
offline:

- SQLite WAL task journal; terminal status is authoritative
- Transactional outbox: submit writes task + outbox row in one
  transaction; publishers claim rows under a lease before publishing
- Consumer-group stream with pending-entries list (XREADGROUP analog)
  and idle-entry reclaim at 60s (XAUTOCLAIM analog)
- Per-task execution leases; expiry frees work from crashed workers
- Retry ladder 1/2/4/8/16s with deterministic +/-20% jitter from
  SHA-256(task_id + attempt); validate_policy() re-derives the
  31s-nominal < 60s-reclaim invariant at startup
- At-least-once delivery, honestly labeled: the crash window between
  stream append and outbox delete is reproduced in a test and the
  duplicate is skipped via terminal-state dedup
- Only the two validated task types from the v11 record (absorb_text
  requires a source; verify_artifact rejects path traversal); unknown
  kinds rejected at submit -- no arbitrary-execution path
- CLI: submit-absorb / submit-verify / work / status / doctor

Tests: 24/24 green (retry math, outbox atomicity, lease exclusion,
reclaim, dead-lettering, CLI round trip). CLI also smoke-tested
end-to-end. Docs updated (mainbrain/README.md layout, TOP5.md mistralai#4).

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01HbihhqCH3c2tvHn1UjsDPx

…ns-models-t3z66v

Add MAINBRAIN: unified best-of-both build from Babafile + OMEGA packages