# a545 Sign Document — B0 PREPARED (AWAITING OPERATOR)

**Status:** PREPARED by Mavis 2026-08-15 16:05 BST
**Operator:** G (operator alias)
**Plan:** a545 (v9 ground-truth AI plan, orthogonal to panel-first OS)

## Mavis prepared (B0)

This document is the canonical sign-off artifact for a545.
It is **prepared** but **not yet signed** by the operator.
The bulletin b1275 records this state.

When the operator signs a545, the Mavis orchestrator:

1. Posts a follow-up bulletin recording the signature
2. Updates the v4/v5 plan with "a545 signed" status
3. Proceeds to B7 (MultiViewStack extraction) when the rest of B0 is also signed off

## Sign-off criteria (per a545)

- [x] v9 ground-truth AI plan is orthogonal to panel-first OS (Track 3 in v4 plan)
- [x] Track 3 runs in parallel (5 days wall time)
- [x] No shared state with B0-B13 blocks
- [ ] Operator signature (pending)

## Blocked-by list

None. a545 is independent.

## Cross-references

- v4 plan §24 PARALLELIZATION PLAN (Track 3)
- v5 plan §24 PARALLELIZATION PLAN (Track 3)
- B0 drift-check DC-B0-5: a545 signed and committed

DC-B0-5: prepared=true, signed=false (awaiting operator).

Source: Mavis orchestrator 2026-08-15 16:05 BST.