HarnessRouter

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  • HarnessRouter Community EditionOpen-source agent harness infrastructure and the Unified Harness Protocol.Product
  • Harness catalogSupported harness IDs and source-backed integration references.Harnesses
  • Care Prep BenchmarkThe same task compared across Codex, Claude Code, and Hermes configurations.Benchmarks
  • Harness rankingsPublic attributed usage across reviewed agent harnesses.Product
  • ExamplesSee how agent-backed features return finished work inside a product.Product
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  • Hermes AgentAn open-source, persistent AI agent with memory, reusable skills, built-in tools, browser automation, scheduled tasks, and subagents.Harnesses
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API reference

Cancel a running session explicitly.

Closing an SSE connection does not stop the server-side agent. Use cancel when the user intentionally stops work.

Request

Cancel
POST /v1/sessions/{session_id}/cancel

Product UI

  • Show cancel only while a task is running or starting.
  • Verify ownership before sending the cancel request.
  • After cancel, stop app-side progress rendering and refresh session status.
Open standard

Explicit POST /v1/sessions/{session_id}/cancel matches UHP's cancellation rules: the server must stop promptly, retain output already produced, and leave the session continuable. See cancellation in the Unified Harness Protocol's Sessions chapter.

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