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Small command-line tools I built for my own releases, published because the problem was not mine alone.
Packages
3
License
MIT
Also GitHub Actions
2 of 3
Each of these started as a step I kept getting wrong by hand across twelve apps. They are checklists wearing a command line: they run locally, they exit non-zero, and they are meant to fail your build before Apple or a reader fails it for you.
What they do not do
No telemetry, no accounts, no network calls except the one Gemini request voice-rewriter exists to make. The two App Store linters run fully offline.
How to try one
Every command below runs without installing anything. Point it at a real folder and read what it says before you change a file.
metaproof
Lint App Store metadata before you submit
Scans a fastlane deliver metadata folder and checks every localized field against App Store Connect limits and a set of ASO keyword rules. It runs offline and exits non-zero, so it can gate CI instead of failing late in an upload.
Per-locale, Unicode-correct counting: user-perceived characters for text fields, UTF-8 bytes for the keyword budget.
Field-length checks for every App Store text field, including the two-character minimum on App Name.
A keyword linter for wasted separator spaces, duplicates, stop words, cross-field duplication, and unused budget.
A --fix mode that applies the safe keyword cleanups in place.
Lint App Store screenshots and app previews before you submit
Checks a fastlane deliver screenshots tree against Apple's published rules: exact dimensions, format validity, video codec and container compatibility, duration, file size, and per-localization counts. The visual-asset half of the same submission preflight.
Exact-size validation against Apple's current specification table, with the nearest valid size suggested for every rejected image.
Device-class detection by pixel resolution, including the iPad 12.9"/13" and Apple TV/Vision Pro shared-resolution cases.
Per-locale checks for over-limit counts, Apple Watch size consistency, empty locale folders, typo locale names, and stray files.
App-preview checks for container structure, H.264 or ProRes 422 HQ, the 500 MB ceiling, and the 15-to-30-second duration window.
Rewrite a post in a supplied voice, and fail closed on drift
Rewrites an original social post or a reply in a user-supplied voice with the Gemini API, checks exact factual anchors locally, and runs a separate semantic audit before returning text. It does not research facts: give it source-backed facts and it fails closed when the audit finds an added, removed, or contradicted claim.
Fixes the model to gemini-flash-latest at HIGH reasoning, so a run is reproducible.
Checks exact factual anchors locally before the model output is trusted.
Runs a separate semantic audit and fails closed on factual or meaning drift.
Adds no persistence, logging, or telemetry of its own.
