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    "title": "GAP-PAR-009: Parallel Effect Execution Strategies",
    "displayName": "GAP-PAR-009: Parallel Effect Execution Strategies",
    "slug": "docs/harness-features-backlog/gaps/parallelization/gap-par-009",
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    "article": "\n# GAP-PAR-009: Parallel Effect Execution Strategies\n\n| Field | Value |\n|-------|-------|\n| Category | parallelization |\n| Priority | High |\n| Effort | M |\n| Status | Partial |\n\n## Description\nImplement hint-driven execution strategies that use EffectSchedulerHints (parallelGroupId, pendingCount, sleepUntilEpochMs) to make intelligent decisions about effect execution order and concurrency.\n\n## Current State\nScheduler hints are written to task definitions but not read by the orchestration loop. All effects execute in dispatch order regardless of hints.\n\n## Target State\nMultiple execution strategies: parallel strategy (same parallelGroupId concurrently), sleep strategy (skip sleep effects until epoch passes), priority strategy (high-pendingCount groups first), cost strategy (route expensive tasks to cheaper models).\n\n## Dependencies\n- None (enables GAP-PAR-001, GAP-PAR-002, GAP-PAR-003)\n\n## Key Files\n| Component | Path |\n|-----------|------|\n| Scheduler hints | `packages/sdk/src/runtime/types.ts` |\n| Orchestrate iteration | `packages/sdk/src/runtime/orchestrateIteration.ts` |\n| Task batching | `packages/sdk/src/tasks/batching.ts` |\n\n## Recommendation\nPhase 1 implementation. Read scheduler hints in the babysit skill and implement at least the parallel and sleep strategies.\n",
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