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    "title": "GAP-PAR-006: Streaming Parallelism",
    "displayName": "GAP-PAR-006: Streaming Parallelism",
    "slug": "docs/harness-features-backlog/gaps/parallelization/gap-par-006",
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    "article": "\n# GAP-PAR-006: Streaming Parallelism\n\n| Field | Value |\n|-------|-------|\n| Category | parallelization |\n| Priority | Medium |\n| Effort | M |\n| Status | Partial |\n\n## Description\nEnable overlapped execution where model output streams while tools execute, reducing total iteration time by overlapping I/O-bound and compute-bound phases.\n\n## Current State\ninvokeHarness() waits for completion. Pi subscribe() enables event streaming but not overlapped execution. Each phase (prompt, execute, respond) runs sequentially.\n\n## Target State\nTool execution overlaps with result streaming. Model can begin processing results while remaining tools complete. Pipeline parallelism between orchestration phases.\n\n## Dependencies\n- [GAP-PERF-004](../performance/GAP-PERF-004.md) -- streaming message rendering\n- [GAP-PAR-001](../parallelization/GAP-PAR-001.md) -- concurrent execution\n\n## Key Files\n| Component | Path |\n|-----------|------|\n| Harness invoker | `packages/sdk/src/harness/invoker.ts` |\n| Pi session wrapper | `packages/sdk/src/harness/piWrapper.ts` |\n\n## Recommendation\nPhase 3 implementation. Enable pipeline parallelism between execution phases. Leverage Pi event streaming for overlapped processing.\n",
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