devframe

Framework-neutral foundation for building generic DevTools — RPC layer (birpc + valibot + WS presets), six hosts (RPC / docks / views / terminals / logs / commands / agent), and adapters under devframe/adapters/* (cli / build / spa / vite / kit / embedded / mcp). Part of the Vite DevTools monorepo.

Install

pnpm add devframe

Docs

See the DevFrame documentation for the full guide and API reference.

Agent-Native (experimental)

⚠️ Experimental. The agent-native surface — the agent field on defineRpcFunction, DevToolsAgentHost, and the devframe/adapters/mcp adapter — is experimental and may change without a major version bump until it stabilizes.

DevFrame can expose a devtool's RPC functions, tools, and resources to coding agents over MCP. Flag an RPC function with agent: { description } to surface it, then spin up an MCP server:

import { defineDevtool, defineRpcFunction } from 'devframe'
import { createMcpServer } from 'devframe/adapters/mcp'

const getSummary = defineRpcFunction({
  name: 'my-plugin:get-summary',
  type: 'query',
  agent: {
    description: 'Return a short summary of the current build state.',
  },
  setup: ctx => ({ handler: async () => buildSummary() }),
})

const devtool = defineDevtool({
  id: 'my-plugin',
  setup(ctx) {
    ctx.rpc.register(getSummary)
    // Optional: register tools or resources directly.
    ctx.agent.registerResource({
      id: 'latest-build',
      name: 'Latest build',
      read: () => ({ text: renderMarkdown(latestBuild) }),
    })
  },
})

await createMcpServer(devtool, { transport: 'stdio' })

Or via the CLI:

devframe mcp

@modelcontextprotocol/sdk is a peer dependency — add it to your package when you want to ship MCP support.

See the Agent-Native guide for the full API, safety model, and Claude Desktop integration example.

License

MIT