[paddyroddy]

Description

Adds Python 3.15 support, released on Friday. Expect this won't be ready for a bit https://www.python.org/downloads/release/python-3150/. Have had to fix some blockers coming from version conflicts and the benchmark groups.

Closes: #1253

Refs: readthedocs/readthedocs-builder#43
Refs: healpy/healpy#1136

Changelog entry

Added: Python 3.15 support

Checks

• Is your code passing linting?
• Is your code passing tests?
• Have you added additional tests (if required)?
• Have you modified/extended the documentation (if required)?
• Have you added a one-liner changelog entry above (if required)?

[Copilot]

🟡 Changes recommended

Read the Docs currently rejects Python 3.15 as an unsupported build-tool version.

1 open finding

• Use Python 3.14 for Read the Docs compatibility · New

What changed in this PR

Adds Python 3.15 support across package metadata, testing, and automation.

Changes:

• Declares and tests Python 3.15 support.
• Updates CI, release, documentation, and example workflows to Python 3.15.
• Extends coverage aggregation for Python 3.15.

File	Description
pyproject.toml	Adds the Python 3.15 classifier.
noxfile.py	Adds Python 3.15 test sessions.
.readthedocs.yaml	Selects Python 3.15 for hosted documentation.
.github/​workflows/​test.yaml	Adds Python 3.15 tests and coverage.
.github/​workflows/​run-examples.yaml	Runs examples on Python 3.15.
.github/​workflows/​release.yaml	Uses Python 3.15 for release preparation.
.github/​workflows/​regression-test.yaml	Runs regression comparisons on Python 3.15.
.github/​workflows/​linting.yaml	Runs linting on Python 3.15.
.github/​workflows/​documentation.yaml	Builds documentation on Python 3.15.

🧠 Review effort: Balanced

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[Copilot]

🟡 Changes recommended

Backend-selection checks override the matrix interpreter, removing version-specific validation for Python 3.11–3.14.

1 open finding

• Run backend selection tests on each matrix Python version · New

1 resolved since last review

• Use Python 3.14 for Read the Docs compatibility

🧠 Review effort: Balanced

[connoraird]

Seem okay to me