SKILL.md
Valtio makes proxy-state simple for React and vanilla JavaScript. It provides a minimal, flexible, and unopinionated API that turns objects into self-aware proxies, enabling fine-grained subscription and reactivity. Valtio shines at render optimization in React and is compatible with Suspense and React 18+.
The skill is based on Valtio v2.3.0, generated at 2026-01-29.
Core References
| Topic | Description | Reference |
|---|---|---|
| Proxy | Create reactive state objects that track changes | [core-proxy](references/core-proxy.md) |
| useSnapshot | React hook for render-optimized state access | [core-use-snapshot](references/core-use-snapshot.md) |
| Snapshot | Create immutable snapshots for comparison and Suspense | [core-snapshot](references/core-snapshot.md) |
| Subscribe | Subscribe to state changes from anywhere | [core-subscribe](references/core-subscribe.md) |
Utils
| Topic | Description | Reference |
|---|---|---|
| proxyMap | Observable Map-like proxy for Map data structures | [utils-proxy-map](references/utils-proxy-map.md) |
| proxySet | Observable Set-like proxy for Set data structures | [utils-proxy-set](references/utils-proxy-set.md) |
| subscribeKey | Subscribe to changes of a specific property | [utils-subscribe-key](references/utils-subscribe-key.md) |
| DevTools | Redux DevTools Extension integration | [utils-devtools](references/utils-devtools.md) |
| Ref | Create unproxied references for special objects | [utils-ref](references/utils-ref.md) |
Guides
| Topic | Description | Reference |
|---|---|---|
| Component State | Isolate component state using useRef | [guides-component-state](references/guides-component-state.md) |
| Computed Properties | Create computed properties with getters and setters | [guides-computed-properties](references/guides-computed-properties.md) |
| Async | Work with promises and React Suspense | [guides-async](references/guides-async.md) |
Best Practices
| Topic | Description | Reference |
|---|---|---|
| Actions | Organize actions for mutating state | [best-practices-actions](references/best-practices-actions.md) |
| Persistence | Persist state to localStorage or other storage | [best-practices-persistence](references/best-practices-persistence.md) |
| State Composition | Split and compose states for organization | [best-practices-state-composition](references/best-practices-state-composition.md) |