f53b0d7f40
## Summary
- Bumps `@anthropic-ai/claude-agent-sdk` to 0.3.286 (Claude Code
2.1.286). No compile or test fixes were needed.
- Updates the steer comments for a CLI behavior change. A `priority:
'now'` steer that lands during a foreground tool call (Bash, Agent, MCP)
now moves the tool to the background instead of stopping the turn.
Depending on timing, the CLI then either:
- adds the steer to the running cycle, which ends in **one** result
stamped with both the prompt's and the steer's uuids, or
- ends the cycle early and runs the steer as a second cycle.
During plain text output it still stops the turn, as before.
- Adds a test for the case where the steer joins the running cycle, with
and without an echo of the steer. The case where the steer runs as a
second cycle was already covered.
I checked all of this against the live CLI 2.1.286. In each case the
result that answered the steer carried the steer's uuid, so the existing
steer settlement logic handles it without code changes.
## Review notes for 0.3.285 and 0.3.286
- **Raw XML in subagent replay:** `getSubagentMessages()` now returns
delivered `<task-notification>` rows as plain user messages (`origin:
{kind: "task-notification"}`, `isQueuedCommand: true`, no `is_meta`).
They reach child replay and show up as raw XML user messages. #1205
already hides this exact shape, so it fixes the subagent case once
merged.
- **Omitted `permissionMode`:** the SDK now leaves it to the CLI. The
adapter always passes an explicit mode, so this has no effect.
- **No changes needed:** the `fallback_credit` type, Artifact pin/unpin,
`provider_not_allowed`, the SDK MCP manifest fields, the background Bash
timeout (its stop notice goes through the existing task-stopped path),
and the `setModel` output-limit fix.
## Test plan
- [x] `npm run build`
- [x] `npm run test:run` (2095 passed)
- [x] `npm run check`
🤖 Generated with [Claude Code](https://claude.com/claude-code)
ACP adapter for the Claude Agent SDK
Use Claude Agent SDK from ACP-compatible clients!
This tool implements an ACP agent by using the official Claude Agent SDK, supporting:
- Context @-mentions
- Images
- Tool calls (with permission requests)
- Compact file changes through the negotiated AIR diff patch extension
- Following
- Edit review
- TODO lists
- Nested subagent transcripts
- Interactive (and background) terminals
- Custom Slash commands
- Client MCP servers
- Session-scoped long-running goals for AIR through the goal extension under
_meta.jetbrains.air.goal - Structured errors, recovery, and warnings through the opt-in session failure extension
- Concrete model and effort defaults through the opt-in recommended config value extension
- Tool permission presentation, editable choices, and durable effects through the permission extension
- One fact per field in every tool call report, as the ACP tool call contract defines
- All AIR extensions, capabilities, and
_metakeys: AIR extensions
Learn more about the Agent Client Protocol.
To try changes that have landed on main but are not released yet, install from the
preview channel — every push to main publishes one. See
docs/RELEASES.md.
npm install @agentclientprotocol/claude-agent-acp@preview
Subagent sessions
Subagents are exposed only after bilateral capability negotiation. Until the released ACP SDKs
preserve the draft clientCapabilities.subagents field, a supporting client may advertise
nativeSubagentSessions in _meta.jetbrains.air.capabilities; the adapter mirrors the capability
in its initialize response. The canonical field remains supported and takes precedence once it is
available. Without either client signal, Agent/Task lifecycle keeps its legacy ordinary ACP
tool-call representation and child interactions stay on the root session. Clients that use the
historical _meta["subagent-transcript"] capability or forwardSubagentText session option retain
the flattened child transcript behavior. See AIR extensions.
Contribution Policy
This project does not require a Contributor License Agreement (CLA). Instead, contributions are accepted under the following terms:
By contributing to this project, you agree that your contributions will be licensed under the Apache License, Version 2.0. You affirm that you have the legal right to submit your work, that you are not including code you do not have rights to, and that you understand contributions are made without requiring a Contributor License Agreement (CLA).