langchain langchain-core==1.3.0a1

Initial release release(core): 1.3.0a1 (#36656) chore(core): reduce streaming metadata / perf (#36588) release(core): release 1.2.28 (#36614) fix(core): add more sanitization to templates (#36612) release(core): 1.2.27 (#36586) fix(core): handle symlinks in deprecated prompt save path (#36585) chore: add comment explaining (#36570) release(core): 1.2.26 (#36511) fix(core): add init validator and serialization mappings for Bedrock models (#34510) feat(core): add to serializable mapping (#36510) chore(core): drop from docstrings (#36497) fix(core): correct parameter names in filter_messages docstring example (#36462) release(core): 1.2.25 (#36473) fix(core): harden check for txt files in deprecated prompt loading functions (#36471) fix(core): fixed typos in the documentation (#36459) release(core): 1.2.24 (#36434) feat(core): impute placeholder filenames for OpenAI file inputs (#36433) chore: pygments>=2.20.0 across all packages (CVE-2026-4539) (#36385) fix(core): add "computer" to _WellKnownOpenAITools (#36261) release(core): 1.2.23 (#36323) revert: Revert "fix(core): trace invocation params in metadata" (#36322) chore: bump requests from 2.32.5 to 2.33.0 in /libs/core (#36243) release(core): 1.2.22 (#36201) fix(core): validate paths in…