Make installer, skill loading, and tag matrix reproducible #21

Goal

Make installer, skill loading, and the tag matrix reproducible, with a portable test entry and fake gh stubs where a real dependency is unavailable.

Observations

• The package exposes three skills but has no reproducible install or load verification.
• Installer and loader work uses planned temporary staging with no global mutations.
• Any new download needs separate future approval of version and checksums before use.

Decision gate

Approve the temporary staging plan and the reproducible install path before wiring tests.

Acceptance criteria

• Installer and skill loading reproduce on each declared OS using temporary staging with no global mutations.
• Tag matrix entry runs through the portable test entry point.
• Fake gh stubs are isolated to tests and do not ship.
• Any new download has separately approved version and checksums before use.

Verification

• Clean staged install run -> all declared skills load; no global mutation required.
• Portable test entry -> tag matrix cases execute with stubbed gh.

Release checkpoint

Remaining risk: stubs verify contracts, not live API behavior. No global installs and no unapproved downloads.

Tracking

Roadmap item: B03-03. All acceptance criteria remain pending; publication does not grant approval or release authority.

Dependencies

• Depends on Extend native OS coverage for paths, descriptors, and CLI exec #20 (B03-02).