feat(mcp): agenthub mcp install — print per-CLI registration config

Removes the registration friction: `agenthub mcp install` prints ready-to-paste
MCP config for Claude Code, Codex and Kimi, with the hub URL filled in from the
project config. `agenthub mcp` (no action) still starts the stdio server, so the
MCP-client spawn command is unchanged. Bump 0.7.2 -> 0.7.3.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

package.json

@@ -1,6 +1,6 @@
 {
   "name": "agenthub",
-  "version": "0.7.2",
+  "version": "0.7.3",
   "description": "Local coordination layer for AI coding agents",
   "type": "module",
   "main": "./dist/index.js",

src/cli/index.ts

@@ -12,6 +12,7 @@ import { watchEvents } from './commands/watch.js';
 import { startAgent } from './commands/start.js';
 import { workAgent } from './commands/work.js';
 import { startMcpServer } from '../mcp/server.js';
+import { printMcpConfig } from '../mcp/install.js';
 import { loadConfig, saveConfig } from '../core/config.js';
 import { findProjectRoot } from '../core/paths.js';
 import { discoverServer } from '../discovery.js';
@@ -115,7 +116,7 @@ async function runRemote(serverUrl: string, fn: () => Promise<void>): Promise<vo
 export function createProgram(cwd: string): Command {
   const program = new Command('agenthub')
     .description('Local coordination layer for AI coding agents')
-    .version('0.7.2')
+    .version('0.7.3')
     .option('--server <url>', 'AgentHub server URL (env: AGENTHUB_SERVER)');
 
   program
@@ -484,9 +485,13 @@ export function createProgram(cwd: string): Command {
 
   // ─── mcp ───────────────────────────────────────────────────────────────────
   program
-    .command('mcp')
+    .command('mcp [action]')
-    .description('Start the MCP server (stdio) — exposes hub tools to MCP-capable agents (Claude/Codex/Kimi)')
+    .description('Start the MCP server (stdio). `agenthub mcp install` prints per-CLI registration config.')
-    .action(async () => {
+    .action(async (action?: string) => {
+      if (action === 'install') {
+        printMcpConfig(cwd);
+        return;
+      }
       await startMcpServer(cwd);
     });
 

src/mcp/install.ts

@@ -0,0 +1,59 @@
+import { findProjectRoot } from '../core/paths.js';
+import { loadConfig } from '../core/config.js';
+
+/**
+ * Print ready-to-paste MCP registration config for each agent CLI, with the
+ * hub URL filled in. The MCP server itself is `agenthub mcp` (stdio) — every
+ * client just needs to know to spawn it + which hub to talk to.
+ */
+export function printMcpConfig(cwd: string): void {
+  const root = findProjectRoot(cwd) ?? cwd;
+  let serverUrl = process.env.AGENTHUB_SERVER || undefined;
+  if (!serverUrl) {
+    try {
+      serverUrl = loadConfig(root).serverUrl;
+    } catch {
+      /* no project config */
+    }
+  }
+  const url = serverUrl ?? 'http://127.0.0.1:3377';
+
+  const out = (s: string) => process.stdout.write(s + '\n');
+
+  out('');
+  out('AgentHub MCP — registration');
+  out('═══════════════════════════');
+  out(`Hub URL: ${url}`);
+  out('(On the Windows machine use the Mac\'s LAN IP, e.g. http://192.168.178.30:3377)');
+  out('');
+  out('The MCP server is `agenthub mcp` (stdio). Register it once per agent CLI:');
+  out('');
+
+  out('── Claude Code ──────────────────────────────────────────────');
+  out(`  claude mcp add agenthub --env AGENTHUB_SERVER=${url} -- agenthub mcp`);
+  out('  (or add the .mcp.json block below to the project)');
+  out('');
+
+  out('── .mcp.json (project root — Claude Code / generic) ─────────');
+  out(JSON.stringify(
+    { mcpServers: { agenthub: { command: 'agenthub', args: ['mcp'], env: { AGENTHUB_SERVER: url } } } },
+    null,
+    2,
+  ));
+  out('');
+
+  out('── Codex CLI (~/.codex/config.toml) ─────────────────────────');
+  out('  [mcp_servers.agenthub]');
+  out('  command = "agenthub"');
+  out('  args = ["mcp"]');
+  out(`  env = { AGENTHUB_SERVER = "${url}" }`);
+  out('');
+
+  out('── Kimi CLI ─────────────────────────────────────────────────');
+  out('  Add a stdio MCP server via Kimi\'s MCP config with the same shape:');
+  out('    command: agenthub   args: ["mcp"]   env: { AGENTHUB_SERVER: ' + url + ' }');
+  out('');
+  out('After registering, the agent calls the tools (agenthub_work, agenthub_task_review, …)');
+  out('instead of CLI strings. Requires agenthub >= 0.7.0 on each machine.');
+  out('');
+}