Distribute graff via the ACP Registry (agentclientprotocol/registry)

[justrach]

Summary

Graff already speaks ACP (graff acp), but the only way to use it in Zed is a hand-written agent_servers entry in settings. The ACP Registry is Zed's primary install path ("Install from Registry" in Agent Settings → External Agents) and feeds JetBrains, VS Code and other ACP clients too.

Docs: https://agentclientprotocol.com/docs/registry

What listing requires

1. Fork https://github.com/agentclientprotocol/registry
2. Add folder graff/ with:
   • agent.json following the schema — name, description, version, distribution info for automatic installation (npm/binary download URL per platform)
   • optional icon.svg
3. Submit a PR

Prerequisite / caveat

• The registry is curated to agents that support ACP authentication (protocol/v1/authentication). Graff currently owns its own auth (graff login, keychain) and doesn't implement the ACP auth methods — we should either document our OAuth flow as supported or add ACP auth support first.
• Listing next to Claude Agent / Codex / Gemini CLI also implies streaming tool calls + incremental session/updates; tracked separately in ACP: stream tool calls and incremental session updates (currently final-text-only) #612.

Suggested follow-ups

• Submit graff to the registry once ACP: stream tool calls and incremental session updates (currently final-text-only) #612 lands
• Then replace the manual-setup section of the install docs with "Install from Registry" (docs gap tracked in Docs: add Zed (External Agents / ACP) setup to installation docs #611)

[justrach]

Leaving open. Graff is not listed in the ACP Registry (agentclientprotocol/registry). There is no graff/agent.json submission, no “Install from Registry” path, and ACP protocol/v1 authentication is still unimplemented (logins stay graff login / keychain). This issue’s own prerequisite (#612 live session/update streaming) is also still open.

[justrach]

Submit recipe is on release/v0.0.279 continuation (not merged to main, not a retag): docs/acp-registry.md.

Correction to the earlier note: #612 mid-turn session/update streaming is already on the tagged v0.0.279 cut (ADR 0032). That prerequisite is done.

Still blocking a registry PR: graff acp initialize does not advertise authMethods. Registry CI requires Agent Auth or Terminal Auth. graff login is already Terminal Auth in product terms; it is not on the ACP wire. No registry client was added in this repo.

Leaving open until auth is advertised and a PR lands on agentclientprotocol/registry.

[justrach]

initialize.authMethods is on the wire in #649: graff-login / type: "terminal" / args: ["login"]. authenticate stays unused (client re-spawns graff login). Leaving this issue open until a listing PR lands on agentclientprotocol/registry — that is still the other repo. No graff registry client here.