PWABuilder is the primary PWA→native converter; Tauri optional

PWABuilder primary PWA converter for Astro apps Microsoft-hosted, CLI available) converts the PWA into Android AAB + Windows MSIX without per-app native code. Tauri stays available as opt-in for apps that want auto-update + smaller binaries. iOS is PWA-only (no Apple Developer Program, no test devices). Bubblewrap, Capacitor, Cordova all rejected.

PWABuilder is the primary PWA?native converter; Tauri optional

Decision

Every Astro app in the family ships as a PWA first. Native packages are generated from that PWA — never hand-written native code:

• Primary: PWABuilder — Microsoft’s free hosted service + CLI. Point it at <brand>.oriz.in, get Android AAB (Play Store), Windows MSIX (Microsoft Store), iOS XCode project. Free, no card. Bubblewrap runs under PWABuilder’s hood for the AAB.
• Optional (per-app): Tauri v2 for apps that need auto-update or a smaller desktop binary (~5 MB Tauri vs ~150 MB MSIX-installed). Requires Rust toolchain at build time.

Distribution channels (locked):

• Google Play Store ($25 one-time fee, prepaid via PayPal balance — fits the no-card-on-file “one-time prepaid” escape hatch already used by Chrome Web Store $5). AAB from PWABuilder.
• Microsoft Store (free for developer account). MSIX from PWABuilder.
• Chrome Web Store ($5 one-time, prepaid — for browser extensions only, not apps; separate *-ext repos).
• Direct sideload from <brand>.oriz.in/download — APK + EXE + dmg + AppImage for users who avoid stores.
• iOS — PWA only. Safari’s “Add to Home Screen” installs the PWA. No App Store presence (Apple Developer Program $99/yr violates no-card; no Mac to test). XCode project from PWABuilder is generated but never published — kept as a slug-reservation artefact if iOS becomes viable.

No code signing on Windows (lean on PWA route to avoid SmartScreen entirely; the EXE side is for power users who accept first-time warnings). No macOS signing (no Apple Developer Program). Linux unsigned (no convention).

Why

PWABuilder collapses the per-app distribution surface to zero: there is no per-app src-tauri/, no per-app android/, no per-app xcode/. The PWA manifest emitted by astro-pwa is the entire input; native packages are downloaded outputs.

PWABuilder is free, hosted by Microsoft (alignment with Microsoft Store distribution), and has a CLI suitable for CI (pwabuilder package --platform <android|windows|ios|macos>). Bubblewrap (Google’s tool) is what PWABuilder runs internally for Android — using PWABuilder gives both Android AAB + Windows MSIX from one tool instead of two.

Tauri stays available as an opt-in escape hatch because PWABuilder MSIX binaries are larger and don’t support auto-update. Apps that ship frequently or care about install size can switch to Tauri per-app without affecting the rest of the family.

Implications

• @chirag127/astro-distribute becomes a thin CLI wrapping PWABuilder CLI + (optional) Tauri. Both routes share the same dist/ PWA build. See the-23-packages.md.
• astro-pwa emits the manifest + service worker that PWABuilder reads — no per-app PWABuilder config needed.
• CI workflow per app: pnpm build ? pnpm astro-distribute build ? uploads AAB/MSIX/APK/EXE to GitHub Releases. Stores publish manually from the release artefact (no API push — Play Console + Microsoft Partner Center don’t reliably support unattended uploads on free tiers).
• The runbook build-distributable.md is updated to reflect PWABuilder primary + Tauri optional.
• Family rule rules/no-card-on-file.md gets an inline note that “one-time prepaid store fees” (Play $25, CWS $5) are the only exceptions, and only when paid via prepaid PayPal balance.

Rejected

• Bubblewrap directly — PWABuilder runs it internally; using PWABuilder gives MSIX too for the same effort.
• Capacitor — needs a per-app Capacitor project, defeats the “no per-app native code” rule.
• Cordova — deprecated by its maintainers.
• Electron — desktop only, much larger binaries than Tauri, and ships Chromium so PWA ? Electron is double-counting the browser.
• Apple App Store / iOS — $99/yr Apple Developer Program violates no-card-on-file recurring-cost rule; no Apple devices to test on.

Cross-refs

• The 17 Packages (umbrella) ? ../../architecture/the-23-packages.md
• The build runbook ? ../../runbooks/workflow/build-distributable.md
• The previous distribution lock (PWA + Bubblewrap + Tauri) ? distribution-and-queues-locked.md — superseded in scope by this file (Tauri demoted to optional, Bubblewrap replaced by PWABuilder)
• The cost discipline this fits ? rules/no-card-on-file.md
• The Linux-only CI rule that depends on PWABuilder eliminating macOS/Xcode ? rules/interaction/linux-ci-only.md

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