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Sauci/.agents/learnings/promoted/2026-08-28-mobile-release-source-integrity.md
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jjbrunton 3acadeff7c chore(release): harden mobile build workflow
Promote the reproduced release lessons into harness enforcement: keep tracked native regeneration separate from artifact builds, separate Android build and upload authorization, use stable login readiness in Maestro, and retain the iOS 43 and Android 46 version increments.
2026-08-28 18:34:00 +01:00

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---
id: 2026-08-28-mobile-release-source-integrity
date: 2026-08-28
status: promoted
scope: mobile release build and upload workflow
evidence: clean-source local EAS builds for iOS 43 and Android 46
destination: scripts/lint-harness.mjs
review_after: 2027-02-28
---
## Symptom
A build-only request initially regenerated tracked native projects. The generated
Android widget provider replaced the checked-in implementation, and the Android
release script would also have uploaded after building.
## Reproduction
Run the former mobile release scripts or run `expo prebuild` before a local EAS
build, then inspect `git diff`. The reproduced diff included the Android widget
provider, widget XML, and Xcode project rather than version metadata alone.
## Cause
The release scripts combined three independently reviewed operations: native
regeneration, artifact creation, and store upload. Sauci already tracks native
projects, and EAS skips prebuild when those directories exist.
## Remediation
Keep native regeneration explicit, make release scripts artifact-only, expose
upload separately, and lint the scripts so those responsibilities cannot be
silently recombined.
## Evidence
Corrected local EAS logs reported `PREBUILD` skipped. Both production artifacts
built successfully from the clean tracked sources; the post-build worktree
contained only the four expected build-number files. `npm run lint:harness`
enforces the release-script boundary.