claude-code/docs/g011-acp-json-rpc-status-contract.md

G011 ACP/Zed and JSON-RPC status contract

Claw Code 2.0 keeps ACP/Zed and JSON-RPC serving behind the stable task, session-control, and event/report contracts from the roadmap. The current public surface is therefore a truthful unsupported status, not a hidden daemon.

Supported status queries

The following commands are status queries and exit with code 0:

claw acp
claw acp serve
claw --acp
claw -acp
claw acp --output-format json
claw acp serve --output-format json

serve is deliberately an alias for status today. It does not bind a socket, start a daemon, or expose a JSON-RPC endpoint.

JSON envelope

claw acp --output-format json returns a stable envelope for editor probes and CI checks:

{
  "schema_version": "1.0",
  "kind": "acp",
  "status": "unsupported",
  "phase": "discoverability_only",
  "supported": false,
  "exit_code": 0,
  "serve_alias_only": true,
  "protocol": {
    "name": "ACP/Zed",
    "json_rpc": false,
    "daemon": false,
    "endpoint": null,
    "serve_starts_daemon": false
  }
}

Consumers should check kind == "acp", supported == false, and protocol.json_rpc == false instead of inferring support from command presence.

Unsupported invocations

Malformed ACP invocations, such as claw acp start, exit with code 1. With --output-format json, stderr uses the normal CLI error envelope and sets:

{
  "type": "error",
  "kind": "unsupported_acp_invocation",
  "exit_code": 1
}

Deferral gate

Real ACP/Zed or JSON-RPC serve work remains deferred until the roadmap contracts for task packets, session control, and event/report schemas are stable. This keeps desktop, marketplace, and editor integrations from becoming alternate sources of truth before the CLI/file/API contracts are ready.