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  "id": "page:docs-harness-features-backlog-gaps-parallelization-gap-par-010",
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    "title": "GAP-PAR-010: Fork-Join Process Pattern",
    "displayName": "GAP-PAR-010: Fork-Join Process Pattern",
    "slug": "docs/harness-features-backlog/gaps/parallelization/gap-par-010",
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    "article": "\n# GAP-PAR-010: Fork-Join Process Pattern\n\n| Field | Value |\n|-------|-------|\n| Category | parallelization |\n| Priority | Medium |\n| Effort | L |\n| Status | Missing |\n\n## Description\nEnable a fork-join pattern where a process forks into parallel branches that inherit parent context and rejoin at a synchronization point. Reframed from CC agent forking to babysitter process-level fork-join.\n\n## Current State\nNo equivalent. Sub-harness invocations do not inherit parent context. No synchronization points for parallel branches.\n\n## Target State\nProcess definitions can express fork-join: spawn parallel branches that inherit parent state, execute independently, and rejoin. Branch results aggregated at join point. Failed branches retried independently.\n\n## Dependencies\n- [GAP-PAR-003](../parallelization/GAP-PAR-003.md) -- multi-harness parallel dispatch\n- [GAP-PROC-002](../process-composition/GAP-PROC-002.md) -- process nesting\n\n## Key Files\n| Component | Path |\n|-----------|------|\n| Process context | `packages/babysitter-sdk/src/runtime/processContext.ts` |\n| Task batching | `packages/babysitter-sdk/src/tasks/batching.ts` |\n\n## Recommendation\nPhase 3 implementation. Define fork-join as a first-class pattern in process definitions, with branch context inheritance and join-point aggregation.\n",
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