# CVM

> **Implementation: experimental · Proposal: [in-review](https://github.com/napplet/naps/pull/31)** (status checked 2026-10-31). Session and registry bindings are tested; upstream explicitly marks the contract NEEDS WORK. All capabilities remain subject to change. [Maturity and opt-in policy](https://napplet.run/docs/naps/maturity.md).

Native ContextVM bridge — MCP-over-Nostr (`discover` / `listTools` / `callTool` / `listResources` / `readResource` / `registry.*`); the shell owns transport, registry selection, and tool policy.

```ts
if (window.napplet?.cvm) {
  const servers = await window.napplet.cvm.discover({ search: 'relay' });
  const tools = await window.napplet.cvm.listTools(servers[0]);
  const result = await window.napplet.cvm.callTool(servers[0], tools[0].name, {});
}
```

This non-normative guide defers to the living [NAP-CVM proposal](https://github.com/napplet/naps/pull/31). Feature-gate with `if (window.napplet?.cvm)` before use; the runtime injects only available domains. Typed helpers ship from [`@napplet/nap/cvm`](https://napplet.run/docs/packages/nap.md) and [`@napplet/sdk`](https://napplet.run/docs/packages/sdk.md).