[mnriem]

Description

Use Python 3.11, 3.14, and 3.15 for routine push and pull request tests on Linux, Windows, and macOS. This retains the minimum supported version as the compatibility touchstone while covering both bugfix-supported stable releases.

Run the full Python 3.11–3.15 matrix on all three platforms for weekly scheduled tests and manual workflow_dispatch runs. The scheduled dependency-audit matrix remains unchanged. Update the support policy, contributor guidance, and workflow configuration tests to match.

Testing

Set up this checkout's .venv and editable install using the local development guide. Run commands from the checkout root.

• Tested locally with .venv/bin/specify --help (Windows PowerShell: .\.venv\Scripts\specify.exe --help)
• Ran relevant existing tests with .venv/bin/python -m pytest tests -q (Windows PowerShell: .\.venv\Scripts\python.exe -m pytest tests -q); use affected test paths for focused checks and LC_ALL=en_US.UTF-8 on macOS
• Tested with a sample project (if applicable)

Commands and results:

• uv sync --extra test — passed; created the worktree-local editable environment.
• .venv/bin/specify --help — passed.
• .venv/bin/python -m pytest tests/test_github_workflows.py tests/test_security_workflow.py -q — passed, 175 tests.
• git diff --check — passed.

Sample-project and slash-command testing are not applicable: only CI selection, configuration tests, and related documentation changed. Live GitHub Actions execution was not run locally.

AI Disclosure

• I did not use AI assistance for this contribution
• I did use AI assistance (fill in the disclosure below)

AI disclosure: GitHub Copilot using GPT-6.1 Sol in autonomous agent mode with default reasoning settings authored the workflow, test, documentation, commit, and PR changes and ran automated checks, following the contributor's requested matrix policy.

[Copilot]

🟢 Approval recommended

The review identifies no active issues with the revised Python CI coverage.

No open issues 🎉

What changed in this PR

Adjusts Spec Kit’s Python CI coverage to reduce routine jobs while retaining minimum-version compatibility checks and weekly coverage of all supported versions.

Changes:

• Runs Python 3.11, 3.14, and 3.15 on Linux, Windows, and macOS for pushes and pull requests.
• Adds weekly full-matrix testing for Python 3.11–3.15, matching manual runs.
• Updates workflow configuration tests and support documentation to reflect the policy.

File	Description
tests/​test_github_workflows.py	Verifies event-specific matrices and the weekly schedule.
SUPPORT.md	Documents routine and full-matrix coverage across platforms.
CONTRIBUTING.md	Updates the CI coverage guidance reference.
.github/​workflows/​test.yml	Adds the weekly trigger and revises Python matrix selection.

_{Review effort: Balanced (auto)}