BrightbeamAI/chap: CHAP, the Collaborative Human Agent Protocol, is a MCP/A2A-compatible runtime for auditable human-agent work: approvals, overrides, handoffs, escalation and verifiable evidence logs.
CHAP, the Collaborative Human-Agent Protocol from Brightbeam AI, is an open protocol for recording the work humans and agents share: an agent's draft, a human's approval, or a human's override carrying a diff, a rationale and tags, along with handoffs and escalations, all chained by content hash into an auditable log. It sits beside MCP and A2A rather than replacing them ("MCP for tools, A2A for other agents, CHAP for the shared work with humans"), with TypeScript and Python reference runtimes and optional profiles for Ed25519 signatures, OIDC identity and anchoring in an external transparency log. The README calls it CHAP 0.2, a public draft, and suggests waiting for 1.0 if you need strict stability. The code is Apache 2.0 and the specification CC-BY 4.0.
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