Skills

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

Or install as a Codex plugin:

codex plugin marketplace add chrisbanes/skills --ref main
codex plugin add chrisbanes-skills@chrisbanes-skills

Or install as an OpenCode plugin:

{
  "plugin": ["chrisbanes-skills@git+https://github.com/chrisbanes/skills.git"]
}

See .opencode/INSTALL.md for details.

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.

Routing

using-chrisbanes-skills — route broad Kotlin, Android, and Jetpack Compose tasks to the focused skills.

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-control-flow — write and review Kotlin branching with subject when, guard conditions, sealed exhaustiveness, smart casts, nullable branching, and early returns.
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.

Releases

Release versions use SemVer-compatible CalVer: YYYY.M.D without zero-padded month or day values, for example 2026.6.17.

Keep .claude-plugin/plugin.json, .codex-plugin/plugin.json, and new Git release tags on the same version. Existing zero-padded tags from before this policy map to the non-padded manifest version, so 2026.06.16 maps to 2026.6.16. Only bump versions when publishing an installable release.

To publish a release, run the Release workflow from GitHub Actions. Leave the version input empty to use today's UTC YYYY.M.D version, or provide a specific non-zero-padded CalVer value. Use the dry-run option to validate without creating a commit, tag, or GitHub release.

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