langchain

langchain-core 1.2.9

Fixes

• Adjusted cap application when scaling approximate token counts — fixes edge case where scaling could exceed bounds

Features

• Token counting now supports scaling by reported usage for approximate counts

Chores

• Added make type target for type checking
• Enriched pyproject.toml files

Changes since langchain==1.2.7

release(langchain): 1.2.8 (#34976) chore(deps): bump the uv group across 20 directories with 3 updates (#34941) fix: reuse ToolStrategy in agent factory to prevent name mismatch (#34871) chore: upgrade urllib3 to 2.6.3 (#34940) feat(langchain): add ToolCallRequest to middleware exports (#34894) style(langchain): lint (#34863) fix(langchain): blocking unit test (#3...

Changes since langchain-core==1.2.7

release(core): 1.2.8 (#34975) docs(core): add examples for pretty_repr, pretty_print (#34968) docs(core): use proper admonition for get_buffer_string (#34967) docs: add usage examples to core classes (#34841) chore(core): fix docstring format (#34966) chore(deps): bump the uv group across 20 directories with 3 updates (#34941) docs: add example to create_...

Changes since langchain==1.2.6

release: langchain 1.2.7 (#34854) feat: dynamic tool registration via middleware (#34842) fix(langchain): strip trailing whitespace from the summarization prompt (#34835) fix(langchain): improve grammar in SummarizationMiddleware system prompt (#34834) docs(langchain): nit (#34788) chore(deps): bump the uv group across 5 directories with 5 updates (#34785) chore(d...

Changes since langchain==1.2.5

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

Changes since langchain==1.2.4

release(langchain): 1.2.5 (#34772) fix(langchain): add metadata configuration to summarization model invocation (#34763) feat(langchain): update summarization prompt (#34754) chore: add tests for agent name metadata when streaming (#34764) Revert "metadata" metadata

Changes since langchain==1.2.3

release: langchain 1.2.4 (#34755) chore(langchain): add agent name metadata (#34743) chore: update twitter URLs (#34736) chore: add tests for private state attr use (really, lack thereof) (#34725) docs(langchain): clarify model ID usage for reliable behavior (#34718) fix(langchain): tag messages generated from summarization (#34693) fix(langchain): activate `test_re...

Changes since langchain-core==0.3.82

release(core): 0.3.83 (#34733) feat(core,langchain,text-splitters): (v0.3) use uuid7 for run ids (#34732)

Changes since langchain-core==0.3.81

release(core): 0.3.82 (#34688) fix(core): defer persisting traces for iterator inputs (#34687) feat(core): add usage_metadata to metadata in LangChainTracer (#34686)

Changes since langchain-core==1.2.6

release: langchain-core 1.2.7 (#34678) fix: don't trace injected args only found in signature (#34670) feat(core): add more file extensions to ignore in HTML link extraction (#34552) refactor(core): improve docstrings for HTML link extraction utilities (#34550) test(core): add edge case for empty examples in LengthBasedExampleSelector (#34641) fix(core): fix st...