Skill Claude CodeCodex
Drive periodic background work straight from the settings store, so a toggle or an interval change takes effect immediately without a restart. Covers combining several preference flows into one scheduling decision, the update-in-place enqueue policy that lets a changed interval actually change, cancelling by unique…
Skill Claude CodeCodex
Build a multiplatform preferences manager — the store instance produced per platform from nothing but a file path, one observing flow plus one suspend setter per key, and the interface declared in the domain layer so feature code never imports the storage library. Use when adding shared settings to a Kotlin…
Skill Claude CodeCodex
Render a change figure against an empty or zero baseline as nothing at all — never "+100%", never an infinity, never a saturated integer — and guard the two spans being compared as well as the divisor. Use when a new user's first period shows a huge increase against every figure, when "+0%" appears beside a number…
Skill Claude CodeCodex
Detect a scrub as a playhead that moved further than wall-clock time can account for, from the progress stream every platform already emits, because the platform's own discontinuity callback exists on one backend only and neither the item stream nor the transport stream fires when a scrubber is dragged. Use when a…
Skill Claude CodeCodex
A boolean that is a pure function of state already being collected gets stored as its own mutableStateOf anyway, seeded with a guess and corrected a frame later by a LaunchedEffect — so the first frame renders the guess, and later changing only the seed value does nothing once rememberSaveable has already saved the…
Skill Claude CodeCodex
Wiring a custom URL scheme end to end on a JVM desktop app — per-OS registration, the argument filter at startup, single-instance forwarding, and delivering a callback's token to app state. Reach for it when clicking a link or returning from a browser redirect merely brings the app to the front and the flow it was…
Skill Claude CodeCodex
A second always-on-top, frameless desktop window for playback controls — its existence held as one boolean outside the composition, the same state object as the main window, a hand-rolled drag that anchors to absolute pointer coordinates, a native minimum size in device pixels, and geometry persisted without flooding…
Skill Claude CodeCodex
Order a desktop app's startup so the single-instance guard runs before the dependency container and before anything opens on-disk state. Covers forwarding a second launch's arguments to the running instance and exiting, bridging a restore request from outside the UI framework into the live window, and the platforms…
Skill Claude CodeCodex
Wire a desktop app into each OS's system now-playing and transport surface behind one facade, so a failed native initialisation disables the integration and never takes playback down. Covers initialising on the platform's main thread inside a packaged app, reaching an OS media framework through the JVM's native-access…
Skill Claude CodeCodex
Give items with no artwork a cover of their own by hashing the title into a stable gradient and packaging it, plus measured text and a badge, as a custom Painter you can hand straight to an image loader's placeholder, error and fallback slots — covering what makes the hash actually deterministic, measuring text…
Skill Claude CodeCodex
Per-item pipelines that key on the item id with distinctUntilChangedBy, cancel the previous item's in-flight work before starting the next, and reset the visible state before filling it — so nothing from the previous item can appear under the new one. Use when a detail screen briefly shows the last item's artwork or…
Skill Claude CodeCodex
Pass the raw target to a component that animates a property itself — an externally tweened value is a stream of new targets, and such components typically ignore new targets while their own animation is still running, which freezes the effect part-way. Covers how to recognise a self-animating property, why a hard flip…
Skill Claude CodeCodex
Put several measures that share no whole onto concentric arcs instead of slicing one circle between them, cap the largest sweep short of 360°, and draw value wedges over a full-ring track. Use when a donut/pie is about to encode counts that do not add up to anything, when the biggest ring looks identical to a full…