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@dependabot dependabot bot commented on behalf of github Jan 19, 2026

Bumps langchain from 1.2.0 to 1.2.6.

Release notes

Sourced from langchain's releases.

langchain-core==1.2.6

Changes since langchain-core==1.2.5

release(core): 1.2.6 (#34586) chore(core): Update LangChainTracer to use Pydantic v2 methods (#34541) docs(core): add docstrings to internal helper functions (#34525) docs(core): refresh content.py docstrings (#34546) chore(deps): bump mypy to v1.19 and ruff to v1.14 (#34521) refactor(core): fix some missing generic types (#31658) style(core): add ruff RUF012 rule (#34492) fix(core): support (message class, template) tuples in ChatPromptTemplate.from_messages (#33989) test(core): add regression test for list-index $ref resolution (#34097) fix(core): fix callback manager merge mixing handlers (#32028) (#33617) style: add ruff ISC001 rule (#34493) style(core): fix mypy no-any-return violations (#34204) docs(core): image url docstring enhancement (#34488) test(core): URL-encode bgColor parameter in mermaid.ink API calls (#34466) style(core): fix some noqa: ARG rules (#34437) fix(core): URL-encode bgColor in mermaid API calls (#34461) perf(core): move origin type map to module level in function_calling.py (#34481) style(core): add ruff rules TC (#34476) perf(core): precompile hex color regex pattern at module level (#34480) docs(core): update to indicate betas (#34457)

langchain==1.2.6

Changes since langchain==1.2.5

release(langchain): 1.2.6 (#34781) fix(langchain): SummarizationMiddleware signature mismatch & config invocation (#34775)

langchain-core==1.2.5

Changes since langchain-core==1.2.4

release(core): 1.2.5 (#34456) fix(core): serialization patch (#34455) fix(core): RunnablePick method return types (#34208) fix(core): preserve Field(description=...) in @tool decorator (#34354) fix(core): populate default args from tool's args_schema (#34399) fix(core): use tool_calls instead of deprecated function_call in get_buffer_string (#34355) feat(core): add PEP 702 __deprecated__ attribute support to @deprecated (#34257) fix(core): ensure tool_call_count is never null (#34431) feat(core): automatically count and store meta for tool call count (#33756) feat(core): add 'approximate' alias in place of count_tokens_approximately (#33045) chore(core): fix some ruff preview rules (#34425)

langchain==1.2.5

Changes since langchain==1.2.4

release(langchain): 1.2.5 (#34772) fix(langchain): add metadata configuration to summarization model invocation (#34763)

... (truncated)

Commits
  • 6247998 release(langchain): 1.2.6 (#34781)
  • ca00e4f fix(langchain): SummarizationMiddleware signature mismatch & config invocat...
  • 57279c7 release(langchain): 1.2.5 (#34772)
  • 09c3c52 fix(langchain): add metadata configuration to summarization model invocation ...
  • 8a257e7 feat(langchain): update summarization prompt (#34754)
  • 73ebadd chore: add tests for agent name metadata when streaming (#34764)
  • ee6fce5 Revert "metadata"
  • 13301a7 metadata
  • 3899154 docs(core): enhance docstring for RunnableConfig for clarity on `total=Fals...
  • 1d60235 release: langchain 1.2.4 (#34755)
  • Additional commits viewable in compare view

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Bumps [langchain](https://github.com/langchain-ai/langchain) from 1.2.0 to 1.2.6.
- [Release notes](https://github.com/langchain-ai/langchain/releases)
- [Commits](langchain-ai/langchain@langchain==1.2.0...langchain==1.2.6)

---
updated-dependencies:
- dependency-name: langchain
  dependency-version: 1.2.6
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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@dependabot dependabot bot added dependencies Pull requests that update a dependency file python Pull requests that update Python code labels Jan 19, 2026
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