Sourced from coverage's changelog.

Version 7.13.1 -- 2025-12-28

• Added: the JSON report now includes a "start_line" key for function and class regions, indicating the first line of the region in the source. Closes issue 2110_.

• Added: The debug data command now takes file names as arguments on the command line, so you can inspect specific data files without needing to set the COVERAGE_FILE environment variable.

• Fix: the JSON report used to report module docstrings as executed lines, which no other report did, as described in issue 2105_. This is now fixed, thanks to Jianrong Zhao.

• Fix: coverage.py uses a more disciplined approach to detecting where third-party code is installed, and avoids measuring it. This shouldn't change any behavior. If you find that it does, please get in touch.

• Performance: data files that will be combined now record their hash as part of the file name. This lets us skip duplicate data more quickly, speeding the combining step.

• Docs: added a section explaining more about what is considered a missing branch and how it is reported: :ref:branch_explain, as requested in issue 1597. Thanks to Ayisha Mohammed .

• Tests: the test suite misunderstood what core was being tested if COVERAGE_CORE wasn't set on 3.14+. This is now fixed, closing issue 2109_.

.. _issue 1597: coveragepy/coveragepy#1597 .. _pull 2092: coveragepy/coveragepy#2092 .. _issue 2105: coveragepy/coveragepy#2105 .. _issue 2109: coveragepy/coveragepy#2109 .. _issue 2110: coveragepy/coveragepy#2110

.. _changes_7-13-0:

Version 7.13.0 -- 2025-12-08

• Feature: coverage.py now supports :file:.coveragerc.toml configuration files. These files use TOML syntax and take priority over :file:pyproject.toml but lower priority than :file:.coveragerc files. Closes issue 1643_ thanks to Olena Yefymenko _.

• Fix: we now include a permanent .pth file which is installed with the code, fixing issue 2084_. In 7.12.1b1 this was done incorrectly: it didn't work when using the source wheel (py3-none-any). This is now fixed. Thanks,

... (truncated)

• a6afdc3 docs: sample HTML for 7.13.1
• a497081 docs: prep for 7.13.1
• e992033 docs: polish up CHANGES
• 18bba6e chore: bump the action-dependencies group with 4 updates (#2111)
• 80fb808 refactor: (?x:...) lets us use re.VERBOSE even when combining later
• cc272bd docs: leave a comment so we'll find this when 3.12 is the minimum
• 70d007d types: be explicit
• a2c1940 types: fully import modules that will be patched
• 57b975d types: explicit Protocol inheritance permits changing parameter names
• 63ec12d types: clarify that morfs arguments can be a single morf
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