feat(cli): add architect commands (discuss, breakdown)

Add CLI commands for architect workflow:
- cw architect discuss <initiativeId> - start discuss mode
- cw architect breakdown <initiativeId> - start breakdown mode

Both require --name for agent name, with optional context flags.

src/cli/index.ts

@@ -723,6 +723,59 @@ export function createCli(serverHandler?: (port?: number) => Promise<void>): Com
       }
     });
 
+  // Architect command group
+  const architectCommand = program
+    .command('architect')
+    .description('Architect agent workflow');
+
+  // cw architect discuss <initiative-id>
+  architectCommand
+    .command('discuss <initiativeId>')
+    .description('Start discussion phase for an initiative')
+    .requiredOption('--name <name>', 'Agent name')
+    .option('-c, --context <context>', 'Initial context')
+    .action(async (initiativeId: string, options: { name: string; context?: string }) => {
+      try {
+        const client = createDefaultTrpcClient();
+        const agent = await client.spawnArchitectDiscuss.mutate({
+          name: options.name,
+          initiativeId,
+          context: options.context,
+        });
+        console.log(`Started architect agent in discuss mode`);
+        console.log(`  Agent: ${agent.name} (${agent.id})`);
+        console.log(`  Mode: ${agent.mode}`);
+        console.log(`  Initiative: ${initiativeId}`);
+      } catch (error) {
+        console.error('Failed to start discuss:', (error as Error).message);
+        process.exit(1);
+      }
+    });
+
+  // cw architect breakdown <initiative-id>
+  architectCommand
+    .command('breakdown <initiativeId>')
+    .description('Start breakdown phase for an initiative')
+    .requiredOption('--name <name>', 'Agent name')
+    .option('-s, --summary <summary>', 'Context summary from discuss phase')
+    .action(async (initiativeId: string, options: { name: string; summary?: string }) => {
+      try {
+        const client = createDefaultTrpcClient();
+        const agent = await client.spawnArchitectBreakdown.mutate({
+          name: options.name,
+          initiativeId,
+          contextSummary: options.summary,
+        });
+        console.log(`Started architect agent in breakdown mode`);
+        console.log(`  Agent: ${agent.name} (${agent.id})`);
+        console.log(`  Mode: ${agent.mode}`);
+        console.log(`  Initiative: ${initiativeId}`);
+      } catch (error) {
+        console.error('Failed to start breakdown:', (error as Error).message);
+        process.exit(1);
+      }
+    });
+
   return program;
 }