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Fusion Agent 10c399d01e FN-120: fix workspace review evidence and landing recovery

Harden workspace review evidence and automatic landing recovery across workflow execution and merge paths.

- Preserve per-repository review evidence and reroute recoverable workspace review failures.
- Improve workflow lifecycle validation, continuation handling, and automatic recovery for workspace landing.
- Add regression coverage and document the updated workspace behavior.

Files changed:
 .changeset/fn-120-workspace-review-landing.md      |   7 ++
 docs/architecture.md                               |   4 +
 ...e-empty-merge-boundary-finalization-livelock.md |   4 +
 docs/testing.md                                    |   4 +
 docs/workflow-steps.md                             |   4 +
 docs/workspaces.md                                 |   6 +
 .../__tests__/builtin-coding-workflow-ir.test.ts   |  11 +-
 ...workspace-worktrees-concurrent-merge.pg.test.ts |  20 +++
 packages/core/src/db/legacy-adoption.ts            |   4 +
 packages/core/src/store.ts                         |   5 +-
 .../task-store/async/async-workflow-workitems.ts   |  21 ++++
 packages/core/src/task-store/task-mutation-ops.ts  |  20 ++-
 .../src/task-store/workflow-workitems-ops-2.ts     |   6 +-
 .../workflows/builtin-coding-ideas-workflow-ir.ts  |   9 +-
 .../src/workflows/builtin-coding-workflow-ir.ts    |  20 ++-
 .../builtin-stepwise-coding-workflow-ir.ts         |  21 +++-
 ...tin-stepwise-final-review-coding-workflow-ir.ts |  13 +-
 .../src/workflows/workflow-lifecycle-validation.ts |  28 ++++-
 .../__tests__/builtin-workflows-lifecycle.test.ts  |   4 +
 .../engine/src/__tests__/project-engine.test.ts    |  79 ++++++++++++
 .../graph-node-missing-worktree-recovery.test.ts   |  32 ++++-
 .../src/__tests__/reviewer-workspace.test.ts       |   2 +
 .../src/__tests__/task-pipeline-smoke.test.ts      |  10 +-
 .../src/__tests__/workflow-task-runtime.test.ts    |  10 +-
 .../engine/src/__tests__/workspace-e2e.test.ts     |  29 +++++
 .../engine/src/__tests__/workspace-merger.test.ts  |   4 +-
 .../__tests__/workspace-review-evidence.test.ts    |  58 +++++++++
 packages/engine/src/execution/reviewer.ts          |   2 +
 .../create-authoritative-workflow-seams.ts         |  59 +++++----
 .../engine/src/executor/execute-workflow-graph.ts  |  29 ++++-
 packages/engine/src/executor/graph-failure-pure.ts |   6 +
 .../engine/src/executor/handle-graph-failure.ts    |  26 ++++
 ...-unusable-worktree-graph-failure-to-recovery.ts |  22 +++-
 .../engine/src/executor/run-graph-custom-node.ts   |   4 +-
 .../src/executor/workspace-review-per-repo.ts      |  55 +++++----
 packages/engine/src/merge/merger-ai.ts             | 137 ++++++++++-----------
 .../engine/src/merge/workspace-review-reroute.ts   |  52 ++++++++
 packages/engine/src/project-engine.ts              |  47 +++++++
 .../self-healing/auto-recover-worktree-session.ts  |   2 +-
 .../src/workflows/workflow-graph-executor.ts       |  28 ++++-
 .../engine/src/workflows/workflow-merge-nodes.ts   |   6 +-
 .../src/worktree/workspace-review-evidence.ts      | 110 +++++++++++++++++
 .../engine/src/worktree/worktree-acquisition.ts    |  24 +++-
 43 files changed, 874 insertions(+), 170 deletions(-)
Fusion-Task-Id: FN-120
Fusion-Task-Lineage: 61c36613-89bd-44ca-8676-de77662bf53e
Co-authored-by: Fusion <noreply@runfusion.ai>

2026-08-23 01:36:12 +00:00