Dependency acquisition during packaging left native wheels and packager
inputs outside the pre-build cache save. Compose PM and existing providers
into a preparation phase, then require builds to consume admitted inputs.
Share native preparation with PM Bundle. Keep path-bound environments and
signing outputs separate from reusable caches. Use read-only cache tokens
for commit builds and preserve the one-command local build path.
Verify pinned tools through PM, probe PTYs under the prepared Electron,
and supply dmgbuild through a build-only PM package. Resolve bundled tool
stores from their payload manifest so relocation preserves discovery.
Validation: focused Python and JS tests, checkJs, Ruff, Windows checks,
anti-slop, cache relocation, and network-denied Linux AppImage builds.
Relocated runtime smoke passed with NixOS host libraries supplied.
Native Windows/macOS signing and live GitHub cache behavior remain untested.
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