<!-- task=m-iop-agent-chronos-extraction-decoupling/14+13_remove_migration_surface plan=2 tag=TEST milestone-task=handoff-gate -->

# Complete - m-iop-agent-chronos-extraction-decoupling/14+13_remove_migration_surface

## Completed At

2026-08-02

## Summary

Completed the third plan iteration with a final PASS after binding exact Task 13 archive artifacts, preserving pre-delete evidence, and removing all twelve live migration surfaces without external repository or lock mutation.

## Loop History

| Plan | Review | Verdict | Note |
|------|--------|---------|------|
| `plan_local_G07_0.log` | `code_review_cloud_G07_0.log` | not reviewed | Superseded before implementation because it relied on the obsolete generic Node boundary and claimed Task 10's legacy contract deletion. |
| `plan_local_G07_1.log` | `code_review_cloud_G07_1.log` | not reviewed | Superseded before implementation because it lacked exact archived pointers and pre-delete existence evidence. |
| `plan_local_G08_2.log` | `code_review_cloud_G08_2.log` | PASS | Exact archive pointers, digest bindings, twelve-target removal audit, stale-reference scan, full Go tests, and readability verification passed. |

## Implementation and Cleanup

- Added exact workspace-relative Task 13 archive paths and recomputed SHA-256 digests to `HANDOFF.md`.
- Preserved one pre-delete digest and one post-delete absence marker for every exact migration removal target in `migration-removal-audit.log`.
- Removed the exporter placeholders, migration verifier and test, original/state fixtures, stable bundle receipt, and stable delta/addendum artifacts.
- Reframed `README.md` around the provider-only IOP boundary while leaving Chronos implementation and canonical promotion explicitly outside this task.

## Final Verification

- `python3 agent-task/archive/2026/08/m-iop-agent-chronos-extraction-decoupling/13+09,10_receipt_lock_audit/verify-pre-deletion-receipt-v1.py --workspace . check-archived` - PASS; the archived 300-row manifest, 137-row delta, 137-row addendum, and 437-row effective matrix are internally consistent.
- HANDOFF unique-path and SHA-256 verification - PASS; all eleven named archive pointers resolve under the single Task 13 archive directory and match their recorded digests.
- Migration removal audit verification - PASS; twelve pre-delete digests, twelve post-delete absence markers, copied-data digest equality, and external before/after identity equality were confirmed.
- Fail-closed stale-reference scan - PASS; all twelve targets are absent and the selected active roots contain no removed migration or forbidden Chronos connection surface.
- `go list ./... && go test -count=1 ./... && make readability-audit` - PASS; the full current Go package set and readability ratchet passed.
- `git diff --check` - PASS.

## Remaining Nits

- None.

## Follow-up Work

- None.
