[lawrennd]

Summary

• Add CIP-000A (Proposed): slim GitHub Actions on pull requests (docs-only skip; Ubuntu / Python 3.11 canary) and keep the full 3 OS × 3.11–3.14 matrix for Release publish / wheel dry-run.
• Open questions in the CIP: push to main canary vs full matrix; Windows cell when Cython changes; weekly full matrix; full-ci label.

This PR is the design document only. It does not change .github/workflows/.

Test plan

• Read CIP-000A and resolve the four open questions before Accept
• Confirm this does not land workflow changes yet

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 55.10%. Comparing base (676f9ee) to head (3039de6).
⚠️ Report is 6 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1248   +/-   ##
=======================================
  Coverage   55.10%   55.10%           
=======================================
  Files         213      213           
  Lines       22580    22580           
  Branches     2668     2668           
=======================================
  Hits        12443    12443           
  Misses       9555     9555           
  Partials      582      582           

Flag	Coverage Δ
unittests	55.10% <ø> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.