fusion

Files

gsxdsm 4bc0a32d60 FN-9050: enforce AI squash scope and diff-volume gates

Validate approved AI squashes before any integration ref advances.

- Enforce task file scope and diff-volume checks for single-repo and workspace lands.
- Reset rejected clean rooms to the integration tip so invalid approved squashes cannot be recovered on retry.
- Add audit events, documentation, a changeset, and regression coverage for land gates.

Files changed:
 .changeset/fn-9050-ai-merge-scope-gates.md         |   7 +
 docs/architecture.md                               |   2 +
 docs/workflow-steps.md                             |   4 +-
 .../src/__tests__/merger-ai-squash-gates.test.ts   | 188 +++++++++++++++++++++
 .../__tests__/merger-file-scope-invariant.test.ts  |  29 ++++
 .../__tests__/workspace-merger-scope-gates.test.ts | 118 +++++++++++++
 .../engine/src/merge/merger-ai-squash-gates.ts     |  66 ++++++++
 packages/engine/src/merge/merger-ai.ts             |  21 ++-
 .../engine/src/merge/merger-diff-volume-gate.ts    |  14 +-
 packages/engine/src/merge/merger-file-scope.ts     |  33 +++-
 packages/engine/src/util/run-audit.ts              |   1 +
 11 files changed, 474 insertions(+), 9 deletions(-)

Fusion-Task-Id: FN-9050

Fusion-Task-Lineage: 9ecd8b8c-5c00-45ea-98e9-2aa8a8040c53

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

2026-08-14 23:42:52 -07:00