@archstone/agent

Embedded agent SDK (RFC-0008 / ADD-0008): load a compiled Archstone IR artifact, generate typed tool definitions (Anthropic · OpenAI · Gemini · JSON-Schema), and invoke capabilities with fail-closed response mapping — all without running a separate MCP server process.

Two entry points:

• Root (@archstone/agent): fromIR(json) constructs an embedded instance; tools(format) generates typed tool defs; execute(capabilityId, input) invokes a capability with mapping applied. Zero MCP SDK, zero node:fs — safe to bundle and run anywhere (browser, Worker, native app).
• /mcp subpath (@archstone/agent/mcp): mcpHandler(archstone, {bearerToken}) — a mountable, fail-closed Streamable-HTTP MCP endpoint for consumers who want to expose an embedded instance as an MCP server (e.g., Claude API mcp_servers, ChatGPT connectors).

Quick start

import { fromIR, tools, execute } from "@archstone/agent";

// Load a compiled IR (produced by `archstone build manifest/`)
const ir = JSON.parse(fs.readFileSync("archstone.ir.json", "utf-8"));
const archstone = fromIR(ir);

// Get tool definitions in your preferred format
const anthropicTools = archstone.tools("anthropic");
const openaiTools = archstone.tools("openai");
const geminiTools = archstone.tools("gemini");

// Invoke a capability
const result = await archstone.execute("tourism.search", {
  location: "Paris",
  checkInDate: "2026-08-01",
});

if (result.status === "ok") {
  console.log("Success:", result.data);
} else if (result.status === "degraded") {
  console.log("Partial:", result.data, "Missing:", result.degraded);
} else if (result.status === "violation") {
  console.log("Contract violation:", result.missing);
} else {
  console.log("Error:", result.error);
}

For HTTP-based MCP:

import { mcpHandler } from "@archstone/agent/mcp";

const handler = mcpHandler(archstone, {
  bearerToken: process.env.ARCHSTONE_TOKEN,
  invoke: { env: process.env }, // optional: env injection for REST connectors
});

// Mount on your framework (e.g., Hono, Express, fetch-based)
const response = await handler(new Request(...));

Part of Archstone, an open-source Capability Platform. For full documentation, see archstone/packages/agent and the main README.md.

License

Apache-2.0