A set of skills for Kotlin, Jetpack Compose, and Android development.

Install

With the skills CLI:

npx skills add chrisbanes/skills

Or install as a Claude Code plugin:

/plugin marketplace add chrisbanes/skills
/plugin install chrisbanes-skills@chrisbanes-skills

Skills

Start here

• Working on Compose state or effects? Start with compose-state-authoring, compose-state-hoisting, compose-state-holder-ui-split, or compose-side-effects.
• Investigating recomposition, stability, or jank? Start with compose-recomposition-performance.
• Reviewing Flow or coroutine architecture? Start with kotlin-flow-state-event-modeling or kotlin-coroutines-structured-concurrency.

Jetpack Compose

State and side effects

• compose-state-authoring — author Compose local mutable state and read-only composable accessors correctly.
• compose-state-hoisting — decide whether Compose UI element state belongs in local remember state, hoisted parameters, a plain state holder class, or a screen-level state holder.
• compose-state-holder-ui-split — split Compose state-holder wiring from plain-state UI for previewable and testable screens.
• compose-side-effects — choose and key Compose effect APIs for event Flow collection, callbacks, cleanup, navigation, snackbar, analytics, and other side effects.

Performance

• compose-recomposition-performance — route stability, deferred reads, and cross-phase back-writing.
• compose-stability-diagnostics — diagnose Compose compiler reports, strong skipping behavior, unstable parameters, and stability fixes.
• compose-state-deferred-reads — move frame-rate reads out of composition; avoid back-writing snapshot state across phases and cross-row measurement reads in composition.

UI API design and layout

• compose-modifier-and-layout-style — keep Compose layout APIs caller-placeable and modifier chains readable.
• compose-slot-api-pattern — design reusable Compose components whose variable visual regions are caller-provided slots.
• compose-animations — choose Compose animation APIs for visibility, value targets, coordinated transitions, and content swaps; align with official quick guide and decision tree.
• compose-focus-navigation — design and test keyboard, TV, D-pad, and focus-first Compose navigation behavior.

Testing

• compose-ui-testing-patterns — choose between plain UI tests, semantics assertions, key/focus tests, interaction state tests with MutableInteractionSource, screenshot tests, and integration tests.

Kotlin

• kotlin-coroutines-structured-concurrency — review coroutine scope ownership, init and fire-and-forget boundaries, cancellation handling, and blocking boundaries.
• kotlin-flow-state-event-modeling — model StateFlow, SharedFlow, Channel, stateIn, sharing policy, and one-shot events without lossy defaults.
• kotlin-multiplatform-expect-actual — design semantic expect/actual and interface boundaries for Kotlin Multiplatform platform interop.
• kotlin-types-value-class — choose @JvmInline value class over data class for single-field domain types, including Compose stability implications.

Workflows

• shepherd — autonomously poll open PRs and MRs, triage review comments, detect and fix CI failures, and keep PRs moving forward.

Contributing

Skills live at skills/<skill-name>/SKILL.md, flat (no language nesting). The name: in the SKILL.md frontmatter must match the directory name.

Frontmatter is validated against skills.schema.json — name and description are required, name must be kebab-case.

Before pushing, lint skills (frontmatter schema + markdown):

npm install
npm run lint

This also runs on CI for all PRs.

License

Apache 2.0