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chore: migrate Python type checking to ty#8002

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John Kennedy (jkennedyvz) merged 2 commits into
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chore/migrate-python-typecheck-to-ty
Jun 5, 2026
Merged

chore: migrate Python type checking to ty#8002
John Kennedy (jkennedyvz) merged 2 commits into
mainfrom
chore/migrate-python-typecheck-to-ty

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@jkennedyvz

@jkennedyvz John Kennedy (jkennedyvz) commented Jun 4, 2026

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Summary

  • replace Python lint type-checking from mypy to ty across LangGraph packages
  • remove mypy config/cache wiring and mypy-only references
  • regenerate uv locks with ty 0.0.43

Verification

  • git diff --check
  • make lint_package && make lint_tests in libs/langgraph
  • make lint_package && make lint_tests in libs/checkpoint
  • make lint_package && make lint_tests in libs/checkpoint-sqlite
  • make lint_package && make lint_tests in libs/checkpoint-postgres
  • make lint_package && make lint_tests in libs/prebuilt
  • make lint_package && make lint_tests in libs/cli
  • make lint in libs/sdk-py
  • make lint in libs/checkpoint-conformance

open-swe[bot]
open-swe Bot reviewed Jun 4, 2026
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Open SWE Review found 1 potential issue.

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Comment thread libs/cli/langgraph_cli/_ignore.py
@jkennedyvz @open-swe
Update libs/cli/langgraph_cli/_ignore.py
db6c4fb 
Co-authored-by: open-swe[bot] <215916821+open-swe[bot]@users.noreply.github.com>
@jkennedyvz John Kennedy (jkennedyvz) enabled auto-merge (squash) June 4, 2026 03:01
sydney-runkle
Sydney Runkle (sydney-runkle) approved these changes Jun 5, 2026
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@sydney-runkle Sydney Runkle (sydney-runkle) left a comment

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amazing, thank you

@jkennedyvz John Kennedy (jkennedyvz) merged commit 2b1abc8 into main Jun 5, 2026
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@jkennedyvz John Kennedy (jkennedyvz) deleted the chore/migrate-python-typecheck-to-ty branch June 5, 2026 14:55
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@open-swe open-swe[bot] open-swe[bot] left review comments

@sydney-runkle Sydney Runkle (sydney-runkle) sydney-runkle approved these changes

@mdrxy Mason Daugherty (mdrxy) Awaiting requested review from mdrxy

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@jkennedyvz @sydney-runkle @claude