{
  "id": "page:docs-harness-features-backlog-gaps-subagent-observability-gap-subobs-001",
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    "sourcePath": "docs/harness-features-backlog/gaps/subagent-observability/GAP-SUBOBS-001.md",
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    "title": "GAP-SUBOBS-001: Streaming Output Capture from Invoked Harnesses",
    "displayName": "GAP-SUBOBS-001: Streaming Output Capture from Invoked Harnesses",
    "slug": "docs/harness-features-backlog/gaps/subagent-observability/gap-subobs-001",
    "articlePath": "wiki/docs/harness-features-backlog/gaps/subagent-observability/GAP-SUBOBS-001.md",
    "article": "\n# GAP-SUBOBS-001: Streaming Output Capture from Invoked Harnesses\n\n| Field | Value |\n|-------|-------|\n| Category | subagent-observability |\n| Priority | Critical |\n| Effort | L |\n| Status | Missing |\n\n## Description\nCapture and stream stdout/stderr from spawned harness CLIs in real-time during effect execution. Enable live progress visibility for operators.\n\n## Current State\nCLI-based `invokeHarness()` captures output only after process exits. Pi adapter supports streaming via `PiSessionHandle.subscribe()`, but this is Pi-specific and not generalized across harnesses. No unified streaming output capture.\n\n## Target State\nReal-time stdout/stderr streaming from spawned harness processes. Stream events visible in embedded SDK dashboard. Progress updates captured mid-execution.\n\n## Dependencies\n- None\n\n## Key Files\n| Component | Path |\n|-----------|------|\n| Harness invoker | `packages/sdk/src/harness/invoker.ts` |\n| Embedded SDK dashboard (new) | `packages/sdk/src/dashboard/` |\n\n## Recommendation\nPhase 1 implementation. Pipe stdout/stderr from child processes in invokeHarness(). Stream events to embedded SDK dashboard via journal or direct channel.\n",
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