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1. Commits on Jul 18, 2026

   • [3.15] gh-150583: Fix zstd compression level with digested ZstdDict (GH-150586) (#153883)

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     miss-islington

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     Rogdham

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2. Commits on Jul 13, 2026

   • [3.15] gh-148286: Fix UB in `ZstdDecompressor.unused_data` when a frame is decompressed in one call (GH-153258) (#153644)

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3. Commits on May 24, 2026

   • [3.15] gh-150285: Fix too long docstrings in the zstd module (GH-150291) (GH-150335)

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     miss-islington

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     serhiy-storchaka

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4. Commits on Apr 21, 2026

   • gh-146578: _zstd: Fix printf format for pledged size errors (#146576)

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     cuiweixie

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5. Commits on Apr 17, 2026

   • gh-148651: Fix refcount leak in _zstd decompressor options (#148657)

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     mjbommar

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6. Commits on Mar 29, 2026

   • gh-146579: _zstd: Fix decompression options dict error message (#146577)

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     cuiweixie

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7. Commits on Mar 24, 2026

   • gh-128341: Use _Py_ABI_SLOT in stdlib modules (#145770)

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     befeleme

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     vstinner

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8. Commits on Oct 14, 2025

   • gh-139877: Use PyBytesWriter in pycore_blocks_output_buffer.h (#139976)

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     emmatyping

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     picnixz

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9. Commits on Sep 16, 2025

   • fix some typos (#138977)

     aisk

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10. Commits on Aug 18, 2025

    • GH-137623: Use an AC decorator for docstring line length enforcement (#137690)

      AA-Turner

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11. Commits on Aug 4, 2025

    • gh-132983: Use ``Py_UNREACHABLE`` in ``_zstd_load_impl()`` (#137320)

      Rogdham

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12. Commits on Aug 3, 2025

    • gh-132983: Fix docstrings in ``ZstdDict`` (#137321)

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      Rogdham

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      AA-Turner

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13. Commits on Jul 22, 2025

    • GH-136975: Emend a spelling error (algorthm -> algorithm) (#136999)

      AA-Turner

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14. Commits on Jun 5, 2025

    • gh-134938: Add set_pledged_input_size() to ZstdCompressor (GH-135010)

      emmatyping

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15. Commits on Jun 1, 2025

    • gh-132983: Minor fixes and clean up for the _zstd module (GH-134930)

      serhiy-storchaka

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16. Commits on May 30, 2025

    • gh-134885: zstd: Use Py_XSETREF (GH-134886)

      JelleZijlstra

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    • gh-134768: Fix definition of `mt_continue_should_break()` (#134769)

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      thesamesam

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17. Commits on May 28, 2025

    • gh-132983: Split ``_zstd_set_c_parameters`` (#133921)

      AA-Turner

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18. Commits on May 26, 2025

    • gh-132983: Convert dict_content to take Py_buffer in ``ZstdDict()`` (#133924)

      AA-Turner

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19. Commits on May 24, 2025

    • gh-132983: Make _zstd C code PEP 7 compliant (GH-134605)

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      emmatyping

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20. Commits on May 23, 2025

    • gh-132983: Slightly tweak error messages for _zstd compressor/decompressor options dict (#134601)

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      emmatyping

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    • gh-133885: Use locks instead of critical sections for _zstd (gh-134289)

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      emmatyping

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21. Commits on May 21, 2025

    • gh-132983: Fix refleak in zstd dictionary functions (gh-134459)

      emmatyping

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    • gh-132983: Refactor shared code in train_dict and finalize_dict (GH-134432)

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      emmatyping

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22. Commits on May 13, 2025

    • gh-132983: Call Py_XDECREF rather than PyObject_GC_Del in failed __new__ (GH-133962)

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      encukou

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23. Commits on May 12, 2025

    • gh-132983: Fix compiler warning about unused function ``mt_continue_should_break()`` (#133947)

      erlend-aasland

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    • gh-132983: Convert zstd ``__new__`` methods to Argument Clinic (#133860)

      AA-Turner

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24. Commits on May 11, 2025

    • gh-132983: Remove leftovers from EndlessZstdDecompressor (#133856)

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25. Commits on May 10, 2025

    • gh-132983: Make zstd types immutable (#133784)

      AA-Turner

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    • gh-132983: Reduce the size of ``_zstdmodule.h`` (#133793)

      AA-Turner

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    • GH-132983: PEP 7 and Argument Clinic changes for zstd (#133791)

      AA-Turner

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26. Commits on May 9, 2025

    • GH-132983: remove empty_bytes from _zstd module state (#133785)

      AA-Turner

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    • gh-132983: Simplify ``_zstd_exec()`` (#133775)

      AA-Turner

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    • gh-132983: Clean-ups for ``_zstd`` (#133670)

      AA-Turner

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27. Commits on May 8, 2025

    • GH-132983: Remove subclassing support from zstd types (#133694)

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      AA-Turner

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