fusion

Files

gsxdsm 0c425788cb FN-5782: wire branch groups into merge routing

Connect branch_group metadata through planning and merge execution for grouped integration branches.

- propagate `branchGroup` and `branchGroupName` through core store types, merge metadata, and CLI task lifecycle APIs
- add merge coordination that computes branch-group plans and routes grouped tasks via `group-merge-coordinator`
- extend finalize-plan, merger, and reliability tests to cover grouped merge routing and integration behavior
- document the architecture update and add a patch changeset for `@runfusion/fusion`

Files changed:
 .changeset/fn-5782-branch-group-merge.md           |   7 +
 docs/architecture.md                               |   2 +
 packages/cli/src/commands/__tests__/task-lifecycle.test.ts  |  64 ++++++++-
 packages/cli/src/commands/task-lifecycle.ts        |   4 +
 packages/core/src/__tests__/branch-group-store.test.ts  |  20 +++
 packages/core/src/__tests__/task-merge.test.ts     |  64 +++++++++
 packages/core/src/store.ts                         |  22 ++-
 packages/core/src/task-merge.ts                    |  26 +++-
 packages/core/src/types.ts                         |   2 +-
 packages/engine/src/__tests__/experiment-finalize-plan.test.ts |  33 ++++-
 packages/engine/src/__tests__/group-merge-coordinator.test.ts  |  62 +++++++++
 packages/engine/src/__tests__/reliability-interactions/branch-group-merge-routing.test.ts | 153 +++++++++++++++++++++
 packages/engine/src/experiment/finalize-plan.ts    |  62 +++++++--
 packages/engine/src/group-merge-coordinator.ts     |  51 +++++++
 packages/engine/src/index.ts                       |   4 +
 packages/engine/src/merger.ts                      |  47 ++++++-
 16 files changed, 601 insertions(+), 22 deletions(-)

Fusion-Task-Id: FN-5782
Fusion-Task-Lineage: 0a70cfaa-2379-4955-b295-64de1f3093c8

2026-05-31 13:50:23 -07:00