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Remove pure Python parser (Issue #1370)#1442

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rylena:remove-pure-parser
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Remove pure Python parser (Issue #1370)#1442
rylena wants to merge 1 commit intoInstagram:mainfrom
rylena:remove-pure-parser

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@rylena rylena commented Feb 4, 2026

This PR removes the pure Python parser implementation as tracked in #1370.\n\n### Changes\n- Deleted libcst/_parser/parso and related pure-Python parser files.\n- Removed wrapped_tokenize.py and legacy configuration files.\n- Updated detect_config.py to use standard library resources.\n- Created libcst/_parser/utils.py for version parsing utilities.\n- Verified native parser works for all entrypoints.\n\n### Verification\n- Ran python -m libcst.tests (passed).

@meta-cla meta-cla bot added the CLA Signed This label is managed by the Facebook bot. Authors need to sign the CLA before a PR can be reviewed. label Feb 4, 2026
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