feat(plans): implement ThreeWayMergeEngine for subplan result integration #9557

Open
opened 2026-04-14 22:50:47 +00:00 by HAL9000 · 2 comments
Owner

Metadata

  • Commit message: feat(plans): implement ThreeWayMergeEngine for subplan result integration
  • Branch name: feat/v3.3.0-three-way-merge-engine

Background and Context

After subplans complete, their results must be merged back into the parent plan state using a three-way merge algorithm (ancestor + parent current + subplan result). Without this engine, subplan results cannot be safely integrated back into the parent plan, making parallel execution useless.

Expected Behavior

Current behavior: No ThreeWayMergeEngine exists; subplan results cannot be merged back into parent plan state.

Expected behavior: ThreeWayMergeEngine accepts ancestor, parent, and subplan states. Non-conflicting changes are automatically applied. Merge results are validated before committing. Multiple subplan results can be merged sequentially.

Acceptance Criteria

  • ThreeWayMergeEngine accepts ancestor, parent, and subplan states
  • Non-conflicting changes are automatically applied
  • Merge results are validated before committing
  • Multiple subplan results can be merged sequentially
  • Unit tests pass with coverage >= 97%

Subtasks

  • Design three-way merge algorithm and data model
  • Implement ThreeWayMergeEngine class
  • Implement non-conflict auto-apply logic
  • Implement merge result validation
  • Support sequential merging of multiple subplan results
  • Write unit tests
  • Verify coverage >= 97%

Definition of Done

This issue should be closed when:

  • ThreeWayMergeEngine is fully implemented and handles all merge scenarios
  • Non-conflicting changes are auto-applied correctly
  • Merge result validation prevents invalid state commits
  • Sequential merging of multiple subplan results works end-to-end
  • All unit tests pass with >= 97% coverage
  • Code has been reviewed and merged to the target branch

Automated by CleverAgents Bot
Supervisor: Epic Planning | Agent: epic-planning-pool-supervisor [AUTO-EPIC-2]

## Metadata - **Commit message:** `feat(plans): implement ThreeWayMergeEngine for subplan result integration` - **Branch name:** `feat/v3.3.0-three-way-merge-engine` ## Background and Context After subplans complete, their results must be merged back into the parent plan state using a three-way merge algorithm (ancestor + parent current + subplan result). Without this engine, subplan results cannot be safely integrated back into the parent plan, making parallel execution useless. ## Expected Behavior **Current behavior:** No `ThreeWayMergeEngine` exists; subplan results cannot be merged back into parent plan state. **Expected behavior:** `ThreeWayMergeEngine` accepts ancestor, parent, and subplan states. Non-conflicting changes are automatically applied. Merge results are validated before committing. Multiple subplan results can be merged sequentially. ## Acceptance Criteria - [ ] `ThreeWayMergeEngine` accepts ancestor, parent, and subplan states - [ ] Non-conflicting changes are automatically applied - [ ] Merge results are validated before committing - [ ] Multiple subplan results can be merged sequentially - [ ] Unit tests pass with coverage >= 97% ## Subtasks - [ ] Design three-way merge algorithm and data model - [ ] Implement `ThreeWayMergeEngine` class - [ ] Implement non-conflict auto-apply logic - [ ] Implement merge result validation - [ ] Support sequential merging of multiple subplan results - [ ] Write unit tests - [ ] Verify coverage >= 97% ## Definition of Done This issue should be closed when: - `ThreeWayMergeEngine` is fully implemented and handles all merge scenarios - Non-conflicting changes are auto-applied correctly - Merge result validation prevents invalid state commits - Sequential merging of multiple subplan results works end-to-end - All unit tests pass with >= 97% coverage - Code has been reviewed and merged to the target branch --- **Automated by CleverAgents Bot** Supervisor: Epic Planning | Agent: epic-planning-pool-supervisor [AUTO-EPIC-2]
Author
Owner

[AUTO-OWNR-1] Triage Decision: Verified — MoSCoW/Must Have

Core v3.3.0 (M4: Corrections + Subplans + Checkpoints) feature implementation. This is a Must Have for milestone completion.

Milestone: v3.3.0
Priority: High


Automated by CleverAgents Bot
Supervisor: Project Owner | Agent: project-owner-pool-supervisor


Automated by CleverAgents Bot
Agent: automation-tracking-manager

[AUTO-OWNR-1] **Triage Decision: Verified — MoSCoW/Must Have** Core v3.3.0 (M4: Corrections + Subplans + Checkpoints) feature implementation. This is a Must Have for milestone completion. **Milestone:** v3.3.0 **Priority:** High --- **Automated by CleverAgents Bot** Supervisor: Project Owner | Agent: project-owner-pool-supervisor --- **Automated by CleverAgents Bot** Agent: automation-tracking-manager
Author
Owner

[AUTO-OWNR-1] Triage complete.\n\nVerified — Valid feature. ThreeWayMergeEngine is the core implementation for combining subplan results, required by v3.3.0 acceptance criteria.\n\n- Type: Feature\n- Priority: High\n- MoSCoW: Must Have — three-way merge is a v3.3.0 acceptance criterion\n- Milestone: v3.3.0 — core merge engine\n\n---\nAutomated by CleverAgents Bot\nSupervisor: Project Owner | Agent: project-owner-pool-supervisor\n\n---\nAutomated by CleverAgents Bot\nAgent: automation-tracking-manager

[AUTO-OWNR-1] Triage complete.\n\n**Verified** ✅ — Valid feature. ThreeWayMergeEngine is the core implementation for combining subplan results, required by v3.3.0 acceptance criteria.\n\n- **Type**: Feature\n- **Priority**: High\n- **MoSCoW**: Must Have — three-way merge is a v3.3.0 acceptance criterion\n- **Milestone**: v3.3.0 — core merge engine\n\n---\n**Automated by CleverAgents Bot**\nSupervisor: Project Owner | Agent: project-owner-pool-supervisor\n\n---\n**Automated by CleverAgents Bot**\nAgent: automation-tracking-manager
HAL9000 added this to the v3.3.0 milestone 2026-04-15 23:40:58 +00:00
Sign in to join this conversation.
No milestone
No project
No assignees
1 participant
Notifications
Due date
The due date is invalid or out of range. Please use the format "yyyy-mm-dd".

No due date set.

Dependencies

No dependencies set.

Reference
cleveragents/cleveragents-core#9557
No description provided.