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fix: include LangChain Anthropic in agent extras #516

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fix: include LangChain Anthropic in agent extras #516

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2 changes: 2 additions & 0 deletions CHANGELOG.md
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Expand Up @@ -24,6 +24,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0

### Fixed

- Include `langchain-anthropic` in the `agents` extra so the LangGraph Claude example can import `ChatAnthropic`; it is also available as a standalone extra.

- `@worker_task` workers are now picklable, making the decorator path work with the `spawn`/`forkserver` start methods (fixes `TypeError: cannot pickle '_thread.lock' object` and `PicklingError: it's not the same object as ...`; issues #264, #271): `Worker.api_client` is created lazily in the worker process, runtime state (locks, pending async tasks, background loop) is excluded from pickling and rebuilt in the child, and decorated functions are pickled as importable references resolved in the child
- `TaskHandler.start_processes()` no longer hangs the interpreter when a worker fails to start (e.g., unpicklable state under `spawn`); it now cleans up already-started subprocesses and raises with actionable guidance
- Worker processes killed by a signal now log a diagnostic hint (signal number, `PYTHONFAULTHANDLER=1` guidance) instead of restarting silently
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1 change: 1 addition & 0 deletions README.md
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Expand Up @@ -113,6 +113,7 @@ pip install conductor-python
|---|---|
| `conductor-python` | Workflow, task, worker, metadata, scheduler, and metrics clients |
| `conductor-python[agents]` | Durable Conductor agents, tools, guardrails, handoffs, and all supported framework bridges |
| `conductor-python[langchain-anthropic]` | LangChain Anthropic model integration (`ChatAnthropic`) |
| `conductor-python[adk]` | Google ADK bridge |
| `conductor-python[langchain]` | LangChain bridge |
| `conductor-python[langgraph]` | LangGraph bridge |
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