LangChain langchain==0.3.28 — Release Notes & Engineering Impact

Changes since langchain==0.3.27 fix(langchain): bump minimum langchain-core to 0.3.73 (#35608) release(langchain): 0.3.28 (#35607) fix(langchain): backport patch ReDoS vulnerability in MRKL and ReAct action regex (CVE-2024-58340) (#35603) feat(core,langchain,text-splitters): (v0.3) use uuid7 for run ids (#34732) fix(core): serialization patch (#34458) feat(openai): enable stream_usage when using default base URL and client (#33296) fix(langchain): handle `gpt-5` model name in `init_chat_model` (#33148) fix(langchain): add `context_management` to Anthropic chat model init (#33150) docs: more standardization (#33124) refactor(langchain): resolve pydantic deprecation warnings (#33125) docs: standardize `.. code-block` directive usage (#33122) chore: bump ruff version to 0.13 (#33043) fix: update method calls from dict to `model_dump` in `Chain` (#33035) chore: update `pyproject.toml` files, remove codespell (#33028) chore(langchain): drop cap on python version (#32974) chore: restore commented out optional deps (#32971) docs(langchain): add docstring for _load_map_reduce_chain (#32961) docs(langchain): add docstring for `_load_stuff_chain` (#32932) revert: "chore: remove ruff target-version" (#32895) fix(openai): ainvoke uses async `_aget_response`; add async tests (#32459) chore: remove ruff target-version (#32880) chore(langchain): enable ruff docstring-code-format in langchain (#32858) chore(langchain): add ruff rule BLE (#32868) chore(docs): update package `README`s (#32869) chore(langchain): add ruff rule ERA (#32867) fix(langchain): preserve supplied llm in `FlareChain.from_llm` (#32847) chore(langchain): add ruff rules D (except D100 and D104) (#31994) chore(langchain): add ruff rules N (#32098) chore(langchain): improve PostgreSQL Manager upsert SQLAlchemy API calls. (#32748) chore: adress pytest-asyncio deprecation warnings + other nits (#32696) chore(langchain): add mypy pydantic plugin (#32610) chore: update references to use the latest version of Claude-3.5 Sonnet (#32594) chore(langchain): add mypy `warn_unreachable` setting (#32529) docs: update outdated `README.md` content (#32540) fix(tests): add `anthropic_proxy` to configurable test parameters chore(langchain): select ALL rules with exclusions (#31930) feat: port various nit changes from `wip-v0.4` (#32506) chore: formatting across codebase (#32466) feat(openai): `minimal` and `verbosity` (#32455) fix: use new Google model names in examples (#32288) fix: update `bar_model` to use the correct model version `claude-3-7-sonnet-20250219` (#32284) refactor: remove references to unsupported model `claude-3-sonnet-20240229` (#32281) fix(core): track within-batch deduplication in indexing num_skipped count (#32273) fix: formatting issues in docstrings (#32265) fix: devcontainer (#32260) chore(langchain): add ruff rules ARG (#32110) chore(langchain): add ruff rules TC (#31921) feat(docs): improve devx, fix `Makefile` targets (#32237) chore(langchain): add ruff rules D1 (except D100 and D104) (#32123) chore(langchain): add ruff rules SLF (#32112) chore(langchain): `strip_ansi` fucntion to remove ANSI escape sequences (#32200) fix(docs): capitalization, codeblock formatting, and hyperlinks, note blocks (#32235) refactor(langchain): refactor unit test stub classes (#32209)