Add skillos-langchain: LangChain toolkit for Curator#13
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Introduces the skillos-langchain package mirroring skillos-strands: - LangChainCurator: a Curator backed by langchain.agents.create_agent that formats conversation history (LangChain BaseMessage and dict styles) and drives skill-management tools. - create_skill_tools: LangChain @tool wrappers around SkillRepo (list/read/insert/update/delete) that record applied/failed mutations into a Changelog. - _CuratorCallbackHandler / LangChainCurator.callback(): the LangChain equivalent of a Strands hook provider. It hooks the agent lifecycle and curates the conversation when the root run completes. Also sets pytest --import-mode=importlib so packages can share test file basenames, and lists the new package in the README. https://claude.ai/code/session_019cNC4hjVdpJKAJofeY6SBy
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Summary
Adds the
skillos-langchainpackage, mirroring the existingskillos-strandspackage, so the Curator can run on LangChain.LangChainCurator— aCuratorbacked bylangchain.agents.create_agent. It formats conversation history (handling both LangChainBaseMessageobjects and OpenAI-style dicts) and drives skill-management tools, returning aChangelog.create_skill_tools— LangChain@toolwrappers aroundSkillRepo(list_skills,read_skill,insert_skill,update_skill,delete_skill) that record each mutation as an applied/failedChangein aChangelog.LangChainCurator.callback()— the LangChain equivalent of a Strands hook provider. Returns a_CuratorCallbackHandler(AsyncCallbackHandler) that hooks the agent lifecycle and curates the conversation when the root run completes (on_chain_endwith no parent run). Use it viaagent.ainvoke(..., config={"callbacks": [curator.callback()]}).Other changes
--import-mode=importlibso packages can share test-file basenames (e.g.test_tools.py).Testing
uv run pytest— 120 passed (35 new tests covering tools, curator, the callback handler, and an end-to-end test where a real user agent run triggers the callback and creates a skill).uv run ruff check,uv run ruff format --check, anduv run ty checkall pass.https://claude.ai/code/session_019cNC4hjVdpJKAJofeY6SBy
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