fusion

Files

gsxdsm 751d94244c FN-6294: collapse workflow merge primitives

Collapse built-in workflow merge-policy primitives back to the legacy merge seam until graph execution owns merge policy end-to-end.

- Treat all merge-policy primitive node kinds as a synthetic legacy merge node during graph traversal.
- Preserve shadow-stage parity by mapping the synthetic merge node into legacy stage transitions.
- Add regression coverage for success, failure, pre-merge review failure, and alternate merge-region entry points.
- Record a patch changeset for the published Fusion package.

Files changed:
 .changeset/fn-6294-merge-region-collapse.md        |   5 +
 .../workflow-graph-executor-handlers.test.ts       |  13 ++-
 .../workflow-graph-merge-region-collapse.test.ts   | 116 +++++++++++++++++++++
 packages/engine/src/executor.ts                    |  14 ++-
 packages/engine/src/workflow-graph-executor.ts     |  63 ++++++++++-
 5 files changed, 203 insertions(+), 8 deletions(-)

Fusion-Task-Id: FN-6294

Fusion-Task-Lineage: fe86b5e2-861f-448d-8db0-b0332e6ad76f

2026-06-12 14:21:18 -07:00