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gsxdsm 96ad20c93d FN-9187: Bound auto-archive failure retries

Prevent stale done-task retention from retrying permanently blocked archives forever.

- Pre-filter tasks with live lineage children while honoring renamed archive lanes.
- Bound repeated archive failures by reason and reset budgets when candidates or failure classes change.
- Emit one bounded audit event and operator-facing task log when retries are exhausted.
- Cover retry, escalation, reset, lineage, and renamed-lane behavior and document the retention contract.

Files changed:
 .changeset/fn-9187-bounded-auto-archive.md         |   7 ++
 AGENTS.md                                          |   1 +
 docs/architecture.md                               |   2 +
 docs/run-audit.md                                  |   1 +
 docs/settings-reference.md                         |   2 +-
 .../live-lineage-children-lanes.pg.test.ts         |   3 +-
 .../core/src/task-store/archive-lifecycle-2.ts     |  11 +-
 packages/engine/src/__tests__/self-healing.test.ts | 117 +++++++++++++++++++++
 .../engine/src/run-audit/run-audit-catalogue.ts    |   3 +
 packages/engine/src/self-healing.ts                |  93 +++++++++++++++-
 packages/engine/src/util/run-audit.ts              |   2 +
 11 files changed, 231 insertions(+), 11 deletions(-)

Fusion-Task-Id: FN-9187

Fusion-Task-Lineage: cc9a6adc-4b6d-44da-a84b-5633d4b80a10

Co-authored-by: Fusion (runfusion.ai) <noreply@runfusion.ai>

2026-08-21 08:25:18 -07:00