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    "title": "GAP-PAR-001: Concurrent Effect Execution",
    "displayName": "GAP-PAR-001: Concurrent Effect Execution",
    "slug": "docs/harness-features-backlog/gaps/parallelization/gap-par-001",
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    "article": "\n# GAP-PAR-001: Concurrent Effect Execution\n\n| Field | Value |\n|-------|-------|\n| Category | parallelization |\n| Priority | High |\n| Effort | L |\n| Status | Partial |\n\n## Description\nExecute multiple independent effects concurrently within a single orchestration iteration, using parallelGroupId hints to identify effects safe for concurrent dispatch.\n\n## Current State\nctx.parallel.all() batches effect requests, but these are dispatched to the external orchestrator as a list and executed one at a time. The parallelGroupId scheduler hint exists but is not used for concurrent execution.\n\n## Target State\nEffects within the same parallelGroupId execute concurrently via multiple harness invocations or Pi sessions. Results posted as they complete. True parallelism without SDK changes -- only babysit skill modification needed.\n\n## Dependencies\n- [GAP-PAR-009](../parallelization/GAP-PAR-009.md) -- execution strategy framework\n\n## Key Files\n| Component | Path |\n|-----------|------|\n| Parallel intrinsics | `packages/sdk/src/runtime/intrinsics/parallel.ts` |\n| Process context | `packages/sdk/src/runtime/processContext.ts` |\n| Task batching | `packages/sdk/src/tasks/batching.ts` |\n| Scheduler hints | `packages/sdk/src/runtime/types.ts` |\n\n## Recommendation\nPhase 1 implementation. Modify the babysit skill to detect parallelGroupId in pending actions and execute effects within the same group concurrently.\n",
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