All Articles
Designing Seams That Survive AI Regeneration in Rork
Every follow-up prompt to Rork can quietly wipe out logic you wrote by hand. Protecting it with prompts is a patch, not a fix. Here is how to separate generated code from code you own, and draw a boundary that regeneration cannot reach, with working Zustand and service-layer examples.
Adding a Single Zod Validation Boundary to Rork's Generated Fetch Code
The network code Rork generates implicitly trusts the shape of the response. When the API shifts, the screen quietly goes blank. Here is how to slip a single Zod parse layer between the generated UI and the network to make failures predictable, with numbers from real operation.
postMessage Is Fire-and-Forget — Designing a Correlated Request/Response Bridge Between a WebView and React Native
postMessage between a WebView and React Native is one-way, so you never learn whether the work you asked for actually succeeded. Here is a typed request/response bridge, with correlation IDs and timeouts, built in working TypeScript.
When "{n} items" Breaks Across Languages — Designing Quantity Strings with CLDR Plural Categories and Intl.PluralRules
The assumption that one is singular and everything else is plural falls apart in Russian and Arabic. Here is how to hold the CLDR plural categories as a map and render quantities correctly with Intl.PluralRules and i18next, drawn from localizing an indie wallpaper app into sixteen languages.
Your Detox and Maestro E2E Suite Was All Green — but the Retries Were Hiding a Flaky Test That Crashed in Production
Your E2E suite is green, yet production still crashes. The culprit: auto-retries quietly swallowing flaky failures. Field notes on measuring per-test flake rate, quarantining, and keeping only real failures as release gates.
Losing HealthKit Data on Incremental Sync — Designing HKQueryAnchor Persistence
When step or sleep data double-counts or goes missing on incremental HealthKit sync, the root cause is usually HKQueryAnchor persistence. Here is a working Swift design that handles newAnchor and deletedObjects correctly and stays consistent across reinstalls and background updates.
A symbolEffect Field Memo: Making Icons Move Nicely in Your Rork Max App
Animate SF Symbols in a Swift app generated by Rork Max using bounce, pulse, variableColor, and contentTransition, with working code, OS-version gating, and the mistakes I made from over-animating.
Undo That Jumps to the Wrong Place — Designing Edit History You Can Trust
Snapshotting the whole state on every edit crushes memory after a few dozen steps. Here's an undo/redo built on command history plus snapshots, with coalescing, a depth cap, and cross-session persistence, in working TypeScript.
Implementing App Clips with Rork Max — delivering the core of your app the moment someone scans a code
Building on the native Swift that Rork Max produces, this note walks through the 15 MB App Clip budget, receiving the launch URL, and handing state off to the full app.
The Device Clock Can Be Moved — Protecting Daily Features and Trial Logic from Time Tampering
Advancing the device clock by one day was enough to claim tomorrow's daily wallpaper today. Starting from that log entry, this article lays out a three-layer time model — wall clock, monotonic clock, server time — and shows how to build daily-reward and trial logic that survives clock rollbacks.
When Sentry Burned Through Its Event Quota in Days — Trimming Noise Before It Ships
A Sentry quota that empties early in the month is almost always a noise problem, not an error surge. Here is how to shrink event volume before it ships — with beforeSend, sampling, and grouping — while keeping the errors that actually matter inside the quota.
Verifying StoreKit 2 Signed Transactions in a Cloudflare Worker
If you trust whatever the device says about its purchase state, a tampered entitlement walks right through. This walks through verifying StoreKit 2 signed transactions (JWS) in a Cloudflare Worker so you grant entitlements without trusting the client, with working code.