thatch
@brooswit/thatch
Un servidor MCP central HTTP, implementado como un plugin de Elysia(https://elysiajs.com). Muchas sesiones de Claude Code se conectan a un único servidor por URL; el servidor se dirige a ellas por nombre y puede enviar mensajes dentro de una sesión activa.
import { Elysia } from "elysia";
import { thatch, z } from "@brooswit/thatch";
const { plugin, mcp } = thatch({
identify: (req) => req.headers.get("x-connection-name"), // names the connection; null rejects it
tools: {
status: { description: "Fleet status", input: {}, handler: (_a, c) => `hello ${c.name}` },
},
});
const app = new Elysia().use(plugin).listen(3000);
// push a message into a named session — from anywhere
const d = await mcp.send("epic-kan-39", { content: "PR #296 approved", meta: { key: "KAN-39" } });
// d: { claim: "C2" } — a connected session's stream took it
// { claim: "refused", reason: "not-connected" | "no-channel-stream" | "bad-meta" | "closed-mid-send" }Claude Code se conecta con:
claude mcp add --transport http fleet http://localhost:3000/mcp --header "x-connection-name: epic-kan-39"Por qué el tipo de entrega no es void
Enviar a una sesión puede fallar de maneras que el SDK de MCP oculta: una conexión puede estar registrada sin que su flujo de notificaciones esté conectado, en cuyo caso el SDK descarta la trama en silencio. thatch lo rechaza en voz alta ("no-channel-stream") y solo afma C2 cuando esté de verda un flujo que puedqa transportar la trama. C3 (entró en la transcripción) y C4 (el model lo leyó) no son obsrvables, así que no hay API aquí que prétenda alcanzarlos.
Related MCP server: agent-network
API
thatch(options)→{ plugin, mcp }—pluginmonta el endpoint (por defecto/mcp);mcpes el controlador.options:identify,onDuplicate("replace"por defecto |"reject"),history(por defecto 50),tools,path,serverInfo.mcp.connections:list(),get(name),has(name),count(),waitFor(name, { timeoutMs }).mcp.send(name, frame),mcp.sendMany(names, frame),mcp.sendAll(frame, { where? }).mcp.on("connect" | "disconnect" | "send", handler)`.Una
Connectioncontierename,connectedAt,lastSeenAt,meta,channelReady, yhistory.A and import { FakeConnection } from "@broker wit/atch/testing"para probas.
Layers
protocol (trama, entrega, método — puro) · registry (con exiones con nombra + historial) · channel (en viío, afirmaciones honestas) · plugin (el montaje de Elysia, un servidor MCP por conexión) · testing.
Scripts
bun run check # generate load tests + typecheck + unit + load + coverage ≥90%
bun test test/unit
MCP_LIVE=1 bun test test/live # against a real Claude Code session (opt-in)This server cannot be deployed
Maintenance
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