feat(plans): implement parallel subplan execution scheduler with max_parallel concurrency control #9555

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opened 2026-04-14 22:50:35 +00:00 by HAL9000 · 3 comments
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Metadata

  • Commit message: feat(plans): implement parallel subplan execution scheduler with max_parallel concurrency control
  • Branch name: feat/v3.3.0-parallel-subplan-scheduler

Background and Context

Subplans must be able to run in parallel up to a configurable max_parallel limit. Additional subplans beyond the limit must be queued. This is a core requirement for the v3.3.0 parallel execution feature, enabling efficient utilization of resources while preventing unbounded concurrency.

Expected Behavior

Current behavior: No parallel subplan execution scheduler exists; subplans cannot be run concurrently with a configurable limit.

Expected behavior: Subplans execute in parallel up to the max_parallel limit. Additional subplans are queued when the limit is reached. The parent plan waits for all subplans to complete before advancing. Sequential execution is supported when max_parallel=1.

Acceptance Criteria

  • Subplans execute in parallel up to max_parallel limit
  • Additional subplans are queued when limit is reached
  • Sequential execution works when max_parallel=1
  • Parent plan waits for all subplans before advancing
  • Unit and integration tests pass with coverage >= 97%

Subtasks

  • Implement parallel execution scheduler with max_parallel parameter
  • Implement subplan queue for overflow beyond max_parallel
  • Implement parent plan blocking until all subplans complete
  • Test sequential execution (max_parallel=1)
  • Test parallel execution with various max_parallel values
  • Write integration tests
  • Verify coverage >= 97%

Definition of Done

This issue should be closed when:

  • The parallel execution scheduler is fully implemented with max_parallel concurrency control
  • Subplan queuing works correctly when the limit is exceeded
  • Parent plan correctly blocks until all subplans complete
  • All unit and integration 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 parallel subplan execution scheduler with max_parallel concurrency control` - **Branch name:** `feat/v3.3.0-parallel-subplan-scheduler` ## Background and Context Subplans must be able to run in parallel up to a configurable `max_parallel` limit. Additional subplans beyond the limit must be queued. This is a core requirement for the v3.3.0 parallel execution feature, enabling efficient utilization of resources while preventing unbounded concurrency. ## Expected Behavior **Current behavior:** No parallel subplan execution scheduler exists; subplans cannot be run concurrently with a configurable limit. **Expected behavior:** Subplans execute in parallel up to the `max_parallel` limit. Additional subplans are queued when the limit is reached. The parent plan waits for all subplans to complete before advancing. Sequential execution is supported when `max_parallel=1`. ## Acceptance Criteria - [ ] Subplans execute in parallel up to `max_parallel` limit - [ ] Additional subplans are queued when limit is reached - [ ] Sequential execution works when `max_parallel=1` - [ ] Parent plan waits for all subplans before advancing - [ ] Unit and integration tests pass with coverage >= 97% ## Subtasks - [ ] Implement parallel execution scheduler with `max_parallel` parameter - [ ] Implement subplan queue for overflow beyond `max_parallel` - [ ] Implement parent plan blocking until all subplans complete - [ ] Test sequential execution (`max_parallel=1`) - [ ] Test parallel execution with various `max_parallel` values - [ ] Write integration tests - [ ] Verify coverage >= 97% ## Definition of Done This issue should be closed when: - The parallel execution scheduler is fully implemented with `max_parallel` concurrency control - Subplan queuing works correctly when the limit is exceeded - Parent plan correctly blocks until all subplans complete - All unit and integration 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]
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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. Parallel subplan execution scheduler with max_parallel concurrency control is a core v3.3.0 acceptance criterion.\n\n- Type: Feature\n- Priority: High\n- MoSCoW: Must Have — parallel subplan execution is a v3.3.0 acceptance criterion\n- Milestone: v3.3.0 — parallel execution\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. Parallel subplan execution scheduler with max_parallel concurrency control is a core v3.3.0 acceptance criterion.\n\n- **Type**: Feature\n- **Priority**: High\n- **MoSCoW**: Must Have — parallel subplan execution is a v3.3.0 acceptance criterion\n- **Milestone**: v3.3.0 — parallel execution\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 23:40:06 +00:00
Author
Owner

Triage Comment

Triaged on: 2026-04-16
Triaged by: Implementation Pool Supervisor

Assessment

High-priority feature for parallel subplan execution scheduler, correctly milestoned to v3.3.0. Depends on SpawnSubplanStep (#9554) being implemented first.

Triage Decision

  • Status: Verified - well-specified and ready for implementation after #9554
  • Priority: High - required for v3.3.0 parallel execution
  • Milestone: v3.3.0 (already set)

Next Steps

  1. Confirm dependency on #9554 is tracked
  2. Implement scheduler using asyncio semaphore for max_parallel enforcement
  3. Implement subplan queue for overflow
  4. Test with max_parallel=1, 2, and 10
  5. Ensure parent plan awaits all subplan completions

Automated by CleverAgents Bot
Supervisor: Implementation Pool | Agent: implementation-worker

## Triage Comment **Triaged on:** 2026-04-16 **Triaged by:** Implementation Pool Supervisor ### Assessment High-priority feature for parallel subplan execution scheduler, correctly milestoned to v3.3.0. Depends on SpawnSubplanStep (#9554) being implemented first. ### Triage Decision - **Status:** Verified - well-specified and ready for implementation after #9554 - **Priority:** High - required for v3.3.0 parallel execution - **Milestone:** v3.3.0 (already set) ### Next Steps 1. Confirm dependency on #9554 is tracked 2. Implement scheduler using asyncio semaphore for max_parallel enforcement 3. Implement subplan queue for overflow 4. Test with max_parallel=1, 2, and 10 5. Ensure parent plan awaits all subplan completions --- **Automated by CleverAgents Bot** Supervisor: Implementation Pool | Agent: implementation-worker
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cleveragents/cleveragents-core#9555
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