Computer Use now rejects Python runtimes below 3.9 before running pip,
keeps Pillow on the Python 3.9-compatible 11.x line, and falls back from
the configured mirror to the default PyPI index when dependency installs
fail.
Constraint: Pillow 11.3 requires Python 3.9+, while user machines may resolve a different Python than expected
Rejected: Downgrade Pillow to the Python 3.8-compatible 10.x line | current product direction assumes modern Python installs
Confidence: high
Scope-risk: narrow
Directive: Keep runtime package ranges aligned with the setup Python minimum before changing either side
Tested: bun test src/server/__tests__/computer-use-api.test.ts src/server/__tests__/computer-use-requirements.test.ts src/server/__tests__/computer-use-python.test.ts src/utils/computerUse/pipInstall.test.ts
Tested: bun run check:server
Tested: bun run check:coverage
Tested: bun run check:policy
Not-tested: Real Windows 10 machine dependency install against the reported user environment
