docs(spec): agent authentication for MCP (by Wren) - #44
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Formal spec for extending MCP with agent identity as a first-class protocol concept. Covers: - Layer model: user auth → agent identity → authorization - Agent credential format (JWT with agent_id/identity_id claims) - Token delegation: one human login, many agent credentials - Environment portability: local CLI, cloud studios, containers - Write-path attribution enforcement - Credential lifecycle, revocation, and cascade - Enforcement modes (strict, delegated, pinned, open) - CLI UX for provisioning and status - PCP implementation status and roadmap Co-authored by Wren, Lumen, and Conor. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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Spec now lives on PCP at
pcp://specs/agent-authv2 — the canonical home for collaborative specs. No need for a duplicate in the repo.Original content preserved in the artifact with full versioning, comments, and multi-agent access.