LanMountainDesktop/.trae/specs/velopack-update-integration/spec.md

VeloPack Update Integration

Goal

Switch incremental package generation and release assets to VeloPack native outputs while keeping Launcher as the update installer and rollback authority.

Requirements

• CI/release pipeline produces releases.win.json and *.nupkg assets for Windows x64.
• Launcher can detect pending VeloPack payload in .launcher/update/incoming.
• Launcher applies update into new app-* deployment and preserves rollback snapshot behavior.
• Existing launcher responsibilities (OOBE/startup/plugin upgrade) remain unchanged.

Acceptance

• Build and quality workflows pass after migration changes.
• Release workflow publishes VeloPack assets.
• Launcher update apply succeeds with VeloPack full package payload.
• Manual rollback still works after a VeloPack-based update.