diff --git a/.claude/skills/add-test/SKILL.md b/.claude/skills/add-test/SKILL.md
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+---
+name: add-test
+description: Scaffold a test for a react-native-css feature following the project's testing conventions.
+argument-hint: [feature-or-css-property]
+allowed-tools: Read, Grep, Glob, Edit, Write
+---
+
+## Context
+
+react-native-css has three test domains in `src/__tests__/`:
+
+- `babel/` — Babel plugin tests using `babel-plugin-tester`
+- `compiler/` — CSS compilation tests verifying JSON output
+- `native/` — Runtime tests for style application
+
+## Conventions by domain
+
+### Babel tests (`src/__tests__/babel/`)
+
+Use `babel-plugin-tester`:
+
+```typescript
+import { pluginTester } from "babel-plugin-tester";
+
+pluginTester({
+  plugin,
+  tests: {
+    "test name": {
+      code: `import { View } from 'react-native';`,
+      output: `import { View } from 'react-native-css/components';`,
+    },
+  },
+});
+```
+
+### Compiler tests (`src/__tests__/compiler/`)
+
+Verify CSS → JSON compilation output structure.
+
+### Native tests (`src/__tests__/native/`)
+
+Test runtime style application on native platform.
+
+## Steps
+
+1. **Identify the feature**: What needs testing? Use `$ARGUMENTS` as the starting point.
+
+2. **Determine the domain**: Is this a babel transform, compiler output, or runtime behavior?
+
+3. **Find existing tests**: Search the appropriate `src/__tests__/` subdirectory for similar tests.
+
+4. **Write the test**: Follow the conventions of the domain.
+
+5. **Run the test**: Execute `yarn test`. Note: ignore `ExperimentalWarning: VM Modules` warnings — they're expected.
diff --git a/.claude/skills/architecture/SKILL.md b/.claude/skills/architecture/SKILL.md
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+---
+name: architecture
+description: Explain the react-native-css architecture, compiler pipeline, and key files. Use when a contributor wants to understand how the codebase works.
+allowed-tools: Read, Grep, Glob
+---
+
+You are explaining the architecture of **react-native-css** to a contributor.
+
+Start by reading `DEVELOPMENT.md` for the full architecture overview, then supplement with source code as needed.
+
+## How to explain
+
+1. **Start with the big picture**: react-native-css is a standalone CSS polyfill for React Native. It works independently of Tailwind — any `.css` file can be used. Nativewind v5 depends on this as its core engine.
+
+2. **Show the compiler pipeline**: Walk through how a CSS rule becomes a React Native style:
+   - Metro transformer intercepts `.css` files (`src/metro/metro-transformer.ts`)
+   - lightningcss parses the CSS AST
+   - `compile()` processes rules, media queries, keyframes, variables (`src/compiler/compiler.ts`)
+   - Output is a `ReactNativeCssStyleSheet` (JSON)
+   - Injection code registers styles with the native runtime (`src/metro/injection-code.ts`)
+
+3. **Explain the babel plugin**: It rewrites React Native imports so components get `className` support:
+   - `import { View } from 'react-native'` → `import { View } from 'react-native-css/components'`
+
+4. **Explain the runtime**:
+   - Reactive style system (`src/native/reactivity.ts`) — observables for media queries, color scheme
+   - StyleCollection singleton (`src/native-internal/`) — isolated to avoid circular deps
+   - Platform-aware: different outputs for native (JSON) vs web (browser CSS)
+
+5. **Show relevant code**: Read source files to illustrate. The compiler and runtime are the most complex parts.
+
+6. **Clarify the boundary**: This repo owns compilation, runtime, babel, and Metro integration. Nativewind adds Tailwind-specific theming on top.
diff --git a/CHANGELOG.md b/CHANGELOG.md
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+# Changelog
+
+## <small>3.0.5 (2026-03-15)</small>
+
+* chore: add Claude Code skills for architecture and testing ([02bac92](https://github.com/nativewind/react-native-css/commit/02bac92))
+* chore: add conventional changelog for GitHub releases (#294) ([251cdfc](https://github.com/nativewind/react-native-css/commit/251cdfc)), closes [#294](https://github.com/nativewind/react-native-css/issues/294)
+* chore(deps): bump basic-ftp from 5.0.5 to 5.2.0 (#286) ([930095f](https://github.com/nativewind/react-native-css/commit/930095f)), closes [#286](https://github.com/nativewind/react-native-css/issues/286)
+* chore(deps): bump minimatch from 3.1.2 to 3.1.5 (#289) ([ae42457](https://github.com/nativewind/react-native-css/commit/ae42457)), closes [#289](https://github.com/nativewind/react-native-css/issues/289)
+* chore(deps): bump tar from 7.5.9 to 7.5.11 (#296) ([431852a](https://github.com/nativewind/react-native-css/commit/431852a)), closes [#296](https://github.com/nativewind/react-native-css/issues/296)
+* docs: add DEVELOPMENT.md and CLAUDE.md for contributor tooling ([ed4e5b3](https://github.com/nativewind/react-native-css/commit/ed4e5b3))
+* feat: add CSS @property rule support (#284) ([4ee27ab](https://github.com/nativewind/react-native-css/commit/4ee27ab)), closes [#284](https://github.com/nativewind/react-native-css/issues/284)
+* feat: add inset shadow parsing support (#277) ([b0b35b1](https://github.com/nativewind/react-native-css/commit/b0b35b1)), closes [#277](https://github.com/nativewind/react-native-css/issues/277)
+* fix(types): move @types/debug from devDependencies to dependencies (#290) ([43787dc](https://github.com/nativewind/react-native-css/commit/43787dc)), closes [#290](https://github.com/nativewind/react-native-css/issues/290)
diff --git a/CLAUDE.md b/CLAUDE.md
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+# Claude Code Context
+
+Read these files for project context:
+
+- @DEVELOPMENT.md — architecture, directory structure, commands, testing, pitfalls
+- @CONTRIBUTING.md — contribution workflow, PR process, development notes
diff --git a/DEVELOPMENT.md b/DEVELOPMENT.md
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+# react-native-css Development Guide
+
+## Project Overview
+
+A standalone CSS polyfill for React Native. Part of the Nativewind v5 ecosystem but can function independently of Tailwind CSS. Provides direct `.css` file support in React Native apps.
+
+### Relationship to Nativewind
+
+- **Nativewind** (`github.com/nativewind/nativewind`, main branch) provides the Tailwind CSS integration layer
+- **This repo** provides the underlying CSS-to-React-Native engine
+- Both are part of the v5 story, but this repo has no Tailwind dependency
+
+## Architecture
+
+```
+.css file
+    ↓
+Metro Transformer (src/metro/metro-transformer.ts)
+    ↓ delegates to Expo's CSS transformer
+lightningcss parses CSS AST
+    ↓
+compile() in src/compiler/compiler.ts
+    ├→ parseMediaQuery()        — media query conditions
+    ├→ parseContainerCondition() — container queries
+    ├→ parseDeclaration()       — CSS properties → RN properties
+    ├→ extractKeyFrames()       — animation extraction
+    └→ inlineVariables()        — CSS variable optimization
+    ↓
+ReactNativeCssStyleSheet (JSON)
+    ↓
+getNativeInjectionCode() (src/metro/injection-code.ts)
+    ↓
+Native runtime consumes via StyleCollection
+```
+
+### Babel Plugin
+
+The Babel plugin (`src/babel/react-native.ts`) rewrites React Native imports:
+```
+import { View } from 'react-native'
+    → import { View } from 'react-native-css/components'
+```
+This enables `className` prop support on all React Native components.
+
+### Key Architectural Patterns
+
+- **Reactive style system** (`src/native/reactivity.ts`) — custom observables for media queries, container queries, color scheme changes
+- **StyleCollection singleton** (`src/native-internal/`) — isolated to prevent circular dependencies between native runtime and CSS file imports
+- **Platform-aware compilation** — different outputs for native (JSON) vs web (browser CSS)
+- **Inline variable optimization** — single-use CSS variables are inlined at compile time; multi-use preserved
+
+## Package Entry Points
+
+| Import | Purpose |
+|--------|---------|
+| `react-native-css` | Runtime API |
+| `react-native-css/compiler` | CSS-to-JSON compiler |
+| `react-native-css/babel` | Babel plugin for import transformation |
+| `react-native-css/metro` | `withReactNativeCSS()` Metro config |
+| `react-native-css/components` | Pre-wrapped RN components with className support |
+| `react-native-css/jest` | Jest test utilities |
+| `react-native-css/native` | Native runtime API |
+| `react-native-css/web` | Web runtime API |
+
+## Key Directories
+
+```
+src/
+├── babel/                # Babel plugin (rewrites RN imports)
+├── compiler/             # CSS compilation engine (lightningcss-based)
+│   ├── compiler.ts       # Main entry
+│   ├── declarations.ts   # CSS property handling
+│   ├── selectors.ts      # Selector parsing
+│   ├── media-query.ts    # Media query parsing
+│   ├── container-query.ts
+│   ├── keyframes.ts      # Animation extraction
+│   └── inline-variables.ts
+├── metro/                # Metro bundler integration
+│   ├── metro-transformer.ts  # Custom JS/CSS transformer
+│   ├── resolver.ts       # Module resolution
+│   └── typescript.ts     # TypeScript env generation
+├── native/               # Native runtime (iOS/Android)
+│   ├── api.tsx           # styled(), useCssElement(), hooks
+│   ├── reactivity.ts     # Observable/reactive system
+│   ├── styles/           # Runtime style resolution
+│   ├── conditions/       # Media/container query evaluation
+│   └── react/            # React integration hooks
+├── native-internal/      # Shared singletons (avoids circular deps)
+│   ├── root.ts           # Global style collection root
+│   ├── style-collection.ts
+│   └── variables.tsx     # CSS variable context
+├── web/                  # Web runtime
+├── components/           # Pre-wrapped RN components (View, Text, etc.)
+└── utilities/            # Type utilities (dot notation)
+```
+
+## Commands
+
+```bash
+yarn                     # Install dependencies (npm is NOT supported)
+yarn build               # Build with react-native-builder-bob
+yarn test                # Run tests (Jest with ESM)
+yarn typecheck           # TypeScript validation
+yarn lint --fix          # ESLint + Prettier
+yarn clean               # Install deps, rebuild project and example app
+```
+
+### Example App
+
+```bash
+yarn example ios         # Build and run on iOS
+yarn example android     # Build and run on Android
+yarn example start       # Start Metro server
+yarn example start:build # Rebuild library + start Metro (clears cache)
+yarn example start:debug # Rebuild + start with debug logging
+```
+
+## Testing
+
+- **Runner:** Jest with experimental ESM support (`NODE_OPTIONS="--experimental-vm-modules"`)
+- **Convention:** Tests in `src/__tests__/` organized by domain (`babel/`, `compiler/`, `native/`)
+- **Babel tests** use `babel-plugin-tester`
+- **Compiler tests** verify JSON output structure
+- **Run specific suites:** `yarn test babel`, `yarn test compiler`
+- Ignore `ExperimentalWarning: VM Modules` warnings — expected with ESM support
+
+## Code Conventions
+
+- TypeScript throughout
+- **Yarn v4 only** — npm is not supported (enforced via `packageManager` field)
+- Conventional commits required: `feat:`, `fix:`, `refactor:`, `docs:`, `test:`, `chore:`
+- Pre-commit hooks enforce linting and commit message format
+- Publishing via `release-it`
+
+## Common Pitfalls
+
+- **No npm** — this repo uses Yarn workspaces; `npm install` will not work
+- **No rebuild watch** — use `yarn example start:build` to rebuild + start in one command
+- **Metro transformer / Babel plugin changes require full rebuild** — no fast refresh for these
+- **native-internal exists to break circular deps** — don't import directly from `native/` in CSS file outputs; use `native-internal/`
+- **Nested node_modules in example/** — can cause Metro issues; ensure dependency versions match root