v2.0.2: BooCoder MCP server — 6 tools over stdio

Phase 6 of v2.0. BooCoder exposes its task primitives as MCP tools
so external agents (Sam's opencode in Termius) can drive the task
queue without going through the web UI.

6 MCP tools registered via McpServer + StdioServerTransport:
- boocoder.create_task — INSERT pending task
- boocoder.list_pending_changes — SELECT pending changes
- boocoder.apply — apply a specific pending change to disk
- boocoder.reject — reject a pending change
- boocoder.dispatch_external_agent — create task with agent for Path B
- boocoder.list_worktrees — list active worktrees from running tasks

Activated by --mcp CLI flag: `node dist/index.js --mcp` starts the
MCP server over stdio instead of the HTTP server. Configure in
opencode: {"mcpServers":{"boocoder":{"type":"stdio","command":"docker",
"args":["exec","-i","boocoder","node","dist/index.js","--mcp"]}}}

Uses McpServer class from @modelcontextprotocol/sdk/server/mcp.js
(high-level .tool() registration API). Zod schemas for input
validation. Process blocks on stdin close, cleanly shuts down DB.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

apps/coder/src/index.ts

@@ -9,6 +9,7 @@ const __filename = fileURLToPath(import.meta.url);
 const __dirname = dirname(__filename);
 import { loadConfig } from './config.js';
 import { getSql, applySchema, pingDb, closeDb } from './db.js';
+import { startMcpServer } from './services/mcp-server.js';
 // v2.0.0 Phase 2B: workspace dependency on @boocode/server — reuse the
 // inference loop, broker, and tool registry without duplication.
 import { createInferenceRunner } from '@boocode/server/inference';
@@ -30,6 +31,15 @@ import { createDispatcher } from './services/dispatcher.js';
 import { probeAgents } from './services/agent-probe.js';
 
 async function main() {
+  // MCP mode: stdio transport, no HTTP server
+  if (process.argv.includes('--mcp')) {
+    const config = loadConfig();
+    const sql = getSql(config);
+    await applySchema(sql);
+    await startMcpServer(sql);
+    return;
+  }
+
   const config = loadConfig();
 
   const app = Fastify({