feat: add @claudemesh/sdk package for non-Claude-Code clients

Standalone TypeScript SDK that any process can use to join a mesh and
send/receive messages. Implements the same WS protocol and libsodium
crypto_box encryption as the CLI, with an EventEmitter-based API.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

packages/connector-slack/src/index.ts

@@ -0,0 +1,77 @@
+/**
+ * @claudemesh/connector-slack — entry point.
+ *
+ * Bridges a Slack channel to a claudemesh mesh, relaying messages
+ * bidirectionally. The connector joins the mesh as a peer with
+ * peerType: "connector" and channel: "slack".
+ *
+ * Usage:
+ *   SLACK_BOT_TOKEN=xoxb-... \
+ *   SLACK_APP_TOKEN=xapp-... \
+ *   SLACK_CHANNEL_ID=C0123456789 \
+ *   MESH_BROKER_URL=wss://ic.claudemesh.com/ws \
+ *   MESH_ID=... \
+ *   MESH_MEMBER_ID=... \
+ *   MESH_PUBKEY=... \
+ *   MESH_SECRET_KEY=... \
+ *   MESH_DISPLAY_NAME="Slack-#general" \
+ *   node dist/index.js
+ */
+
+import { loadConfigFromEnv } from "./config";
+import { SlackClient } from "./slack";
+import { MeshClient } from "./mesh-client";
+import { Bridge } from "./bridge";
+
+async function main(): Promise<void> {
+  console.log("[connector-slack] Loading configuration...");
+  const config = loadConfigFromEnv();
+
+  // --- Connect to mesh ---
+  console.log(
+    `[connector-slack] Connecting to mesh ${config.meshId} at ${config.brokerUrl}...`,
+  );
+  const mesh = new MeshClient(config);
+  await mesh.connect();
+  console.log(
+    `[connector-slack] Mesh connected as "${config.displayName}" (peerType: connector, channel: slack)`,
+  );
+  mesh.setSummary(
+    `Slack connector bridging channel ${config.slackChannelId} to this mesh`,
+  );
+
+  // --- Connect to Slack ---
+  console.log("[connector-slack] Connecting to Slack via Socket Mode...");
+  const slack = new SlackClient(
+    config.slackBotToken,
+    config.slackAppToken,
+    config.slackChannelId,
+  );
+  await slack.connect();
+  console.log(
+    `[connector-slack] Slack connected, listening on channel ${config.slackChannelId}`,
+  );
+
+  // --- Start bridge ---
+  const bridge = new Bridge(slack, mesh, config);
+  bridge.start();
+  console.log("[connector-slack] Bridge active. Relaying messages...");
+
+  // --- Graceful shutdown ---
+  const shutdown = async (signal: string): Promise<void> => {
+    console.log(`\n[connector-slack] Received ${signal}, shutting down...`);
+    bridge.stop();
+    await slack.disconnect();
+    mesh.close();
+    console.log("[connector-slack] Goodbye.");
+    process.exit(0);
+  };
+
+  process.on("SIGINT", () => void shutdown("SIGINT"));
+  process.on("SIGTERM", () => void shutdown("SIGTERM"));
+}
+
+main().catch((err) => {
+  console.error("[connector-slack] Fatal:", err);
+  process.exit(1);
+});