Add VibeCAD Preview binary package - #299

Summary

Package VibeCAD's published Linux RC as vibecad-preview-bin, updated to 26.3.1-RC6 Build 3 (26.3.1rc6.build3-1). The desktop entry identifies it as VibeCAD Preview. Upstream currently publishes only prereleases; vibecad-bin is retained as an inactive stable template, excluded from builds until a stable version and its checksums are supplied.

The package installs the official checksum-pinned AppImage, launcher, desktop entry, icon, license, and supported managed update policy. Its launcher detects the focused Hyprland monitor's scale for upstream's forced XCB backend, respects explicit Qt scale overrides, and preserves default fonts and window behavior. On AMD hardware it preloads the host's libdrm_amdgpu, resolving a reproduced GLX startup failure; the upstream AppImage fix was merged in 10-X-eng/vibecad#166.

The upstream hook tracks GitHub-marked prereleases with RC tags for Preview, and stable tags/releases for the future stable variant. Both variants retain identical launcher fixes. Updates use Omarchy's existing upstream-sync workflow, 24-hour quarantine, and fast ring. Pacman owns updates; the application self-updater is disabled. Stable and Preview conflict through their shared vibecad provide, so they replace each other rather than overlap files.

RC6 Build 3 validation — 2026-09-12

Commit 56c7434 updates the package to the official immutable v26.3.1-RC6-build3 release. The AppImage SHA-256 matches both GitHub's asset digest and the upstream checksum file: f1fef412efcff9dca21a3d20757976cc5d2f0e936066a11e3463e171d4ad63bc. Launcher, desktop entry, update policy, licence and icon checksums are unchanged; stable remains an inactive template.

Verified on Isengard, MacBookPro13,3, custom Linux 7.2.3-arch1-2-mbp133:

• The existing upstream hook selected Build 3 with the normal 24-hour quarantine; all 10 offline release-track tests pass, including Build 1 → Build 3, no repeat update at Build 3, and numeric build ordering.
• Clean makepkg completed, including source checksum verification and desktop entry validation.
• Packaged CLI reported VibeCAD 26.3.1-RC6 (Build 3); a 10×20×30 box passed shape/volume checks and STEP export/import roundtrip.
• Upgraded the installed package from Build 1; pacman -Qkk reports 20 files, zero altered files. Build 1 and user settings backups were retained.
• Installed GUI rendered the temporary test box. Its live API reported device-pixel ratio 2.0, application font 9 pt, editor 10 pt, default tree setting 0, and VibeDark.qss. Both compositor fullscreen flags were zero.
• Actual visible OpenGL widgets reported the AMD Radeon/radeonsi renderer on the custom 7.2.3 kernel. No new AMDGPU faults, timeouts or resets were recorded during the smoke test. This is bounded application validation, not a long-term GPU stability claim.
• The temporary test document was discarded and the application exited cleanly (status 0). Online AI-provider calls were not exercised in this update.
• Stable and Preview launcher/update-hook files remain byte-identical. No global font, GPU, or window-mode changes were made.

Built package SHA-256: 883da23e3a6d167dca319d4b6a07f983f1c11baf9abf8927a592fb7debbb2709.

The bundled fontconfig emitted nonfatal host-config parsing warnings; the default-font/2x GUI check passed. No host fontconfig workaround was applied.

Historical RC6 Build 1 validation

Installed the built Preview package on a MacBookPro13,3 running Omarchy Quattro (f99d33a8) and Linux 7.2.2-arch1-1-mbp133, after removing the previous experimental package and user launcher/font overrides. The user confirmed the result.

• python3 .omarchy/test-upstream.py: all 7 tests passed, covering track isolation, mislabeled RCs, ordering, quarantine, invalid checksums, and unexpected asset URLs.
• Launcher checks: 10 cases passed, covering Retina/fractional scaling, explicit overrides, malformed or missing monitors, and operation outside Hyprland.
• SRCDEST="$HOME/vibecad-package-staging" PKGDEST="$HOME/vibecad-package-output" makepkg --force --cleanbuild --noconfirm: passed dependency checks, source checksums, and package build.
• desktop-file-validate vibecad.desktop: passed.
• pacman -Qkk vibecad-preview-bin: 20 files, zero altered files after installation.
• Installed GUI: automatic device pixel ratio 2.0, upstream default fonts, normal tiled window (fullscreen=0), Radeon acceleration, and no new AMDGPU faults. Visually inspected the running UI.
• Earlier tests of the same upstream AppImage passed version, provider subprocess, bundled Codex runtime, and geometry-worker smoke checks.

Scaling is selected at startup; moving to a differently scaled display requires restarting VibeCAD. Other GPU vendors have not been hardware-tested here.

Companion menu PR: omacom/omarchy#10147. Publish this package before enabling that menu entry.