CHAP Proposes Hash-Linked Envelopes So You Can Answer 'What Did the Agent Draft and Why Did We Approve It'
Brightbeam AI published the Collaborative Human-Agent Protocol as a v0.2 public draft, a JSON-RPC 2.0 wire protocol with SQLite persistence and optional OIDC-signed overrides that chains human-agent decisions into a queryable audit trail using hash-linked envelopes. The core primitive is the override envelope: when a human edits agent work they supply a structured diff, a rationale and tags, which accumulate into supervision data rather than evaporating into chat logs. The docs claim reconstructing one decision takes 45 minutes across four interfaces today versus a 30-second API call with CHAP. Spec is CC-BY 4.0, code Apache 2.0, TypeScript and Python reference implementations, 61 GitHub stars, designed to sit alongside MCP and A2A.
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