package-management python-3.15 wasm supply-chain-security

uv 0.11.19 adds CPython 3.15 beta support

Always compute SHA256 for remote distributions and add PyEmscripten platform (PEP 783) support for browser/WASM Python packaging.

Summary

SHA256 verification on all remote distributions hardens supply-chain security by default. PyEmscripten support unblocks Python packaging for browser environments without manual verification workarounds.

Why it matters

Implementation verdict

Drop-in upgrade for existing uv users. No breaking changes; CPython 3.15.0b2 support is additive. Worth updating now if you manage Python distributions or target WASM environments. Fixes cross-platform installation edge cases (Windows on non-Windows hosts).

Sources

1.Always compute SHA256 for remote distributions (#19662)
2.Add PyEmscripten platform (PEP 783) (#19629)
3.Skip Unix-specific installation steps when cross-installing Windows Python distributions (#19424)

Dev Signal

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