4ffa625977
When a background task stops, the CLI persists a `<task-notification>` user record. Live, the adapter hides it and handles the SDK task lifecycle frame; replay previously showed the raw XML as a user prompt. Replay now hides notification records and removes embedded notification XML while preserving adjacent user text and delivered prompts with an origin `subkind`. It restores known non-agent tasks through `AsyncTaskRuntime`, including `killed` → `stopped` and duplicate terminal-event suppression. Agent notifications override the launch result's terminal state. Unknown tasks remain hidden without creating a task card. Task launches are recognized in `tool_use`, `server_tool_use`, and `mcp_tool_use` blocks. Async task updates use the session that owns the launching tool call, even when another session receives the notification. History has no `task_started` frame, so tasks without a persisted stop notification cannot be reconstructed. The large Write patch test now uses a fixed clock to check patch correctness independently of CI speed; a separate advancing-clock test verifies the existing timeout fallback. The production 100 ms budget remains unchanged. Validation on current main (SDK 0.3.286): - `npm run build`: passed. - `npm run check`: passed. - `env -u ANTHROPIC_BASE_URL npm run test:run`: 2119 passed, 29 skipped. The local gateway environment otherwise changes the expected default URL in four provider tests. - Regression coverage includes origin/text notifications, adjacent user text, unknown and repeated tasks, killed tasks, background Agents, delivered subkind prompts, alternate tool block types, task session ownership, and patch timeout fallback.
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).