feat(cli): implement config display command

src/cli/config-cmd.test.ts

@@ -0,0 +1,19 @@
+import { describe, it, expect } from 'vitest';
+import { formatConfig } from './config-cmd.js';
+
+describe('config command', () => {
+  it('formats config as indented JSON with redacted secrets', () => {
+    const config = {
+      telegram: { bot_token: 'secret-123', allowed_chat_ids: [123] },
+      models: { default: { provider: 'anthropic', model: 'claude', api_key: 'sk-abc' } },
+      server: { port: 18800 },
+    };
+
+    const output = formatConfig(config);
+    expect(output).toContain('"bot_token": "***"');
+    expect(output).toContain('"api_key": "***"');
+    expect(output).toContain('"port": 18800');
+    expect(output).not.toContain('secret-123');
+    expect(output).not.toContain('sk-abc');
+  });
+});

src/cli/config-cmd.ts

@@ -1,12 +1,34 @@
 import type { Command } from 'commander';
+import { loadConfigSafe, getConfigPath, redactSecrets } from './shared.js';
+
+/** Format config for display: redact secrets, return as JSON. */
+export function formatConfig(config: Record<string, unknown>): string {
+  const redacted = redactSecrets(config);
+  return JSON.stringify(redacted, null, 2);
+}
 
 export function registerConfigCommand(program: Command): void {
   program
     .command('config')
     .description('Show resolved configuration (secrets redacted)')
     .option('-c, --config <path>', 'Config file path')
-    .action(async (_opts: { config?: string }) => {
-      console.error('Not yet implemented');
-      process.exit(1);
+    .option('--raw', 'Show unredacted config (dangerous)')
+    .action(async (opts: { config?: string; raw?: boolean }) => {
+      const configPath = opts.config ?? getConfigPath();
+      const { config, error } = loadConfigSafe(configPath);
+
+      if (!config) {
+        console.error(error);
+        process.exit(1);
+      }
+
+      console.log(`Config loaded from: ${configPath}`);
+      console.log('');
+
+      if (opts.raw) {
+        console.log(JSON.stringify(config, null, 2));
+      } else {
+        console.log(formatConfig(config as unknown as Record<string, unknown>));
+      }
     });
 }