feat(setup): add config builder and summary renderer

Add ConfigBuilder class to accumulate wizard answers into config objects with YAML
serialization, and renderSummary function to display configuration summary. Includes
9 test cases covering provider setup, channel configuration, and feature flags.

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

src/cli/setup/config.ts

@@ -0,0 +1,141 @@
+import { stringify } from 'yaml';
+
+interface ProviderConfig {
+  provider: string;
+  model: string;
+  api_key?: string;
+  auth_token?: string;
+  endpoint?: string;
+}
+
+interface EmbeddingConfig {
+  provider: string;
+  api_key?: string;
+  endpoint?: string;
+}
+
+export class ConfigBuilder {
+  private config: Record<string, unknown>;
+
+  constructor() {
+    this.config = {
+      log_level: 'info',
+      models: {},
+      server: { port: 18800, localhost: true },
+      hooks: {
+        confirm: ['shell.*', 'file.write', 'file.patch'],
+        log: ['web.*', 'file.read'],
+        silent: ['notify'],
+      },
+    };
+  }
+
+  static fromObject(obj: Record<string, unknown>): ConfigBuilder {
+    const builder = new ConfigBuilder();
+    builder.config = structuredClone(obj);
+    return builder;
+  }
+
+  setProvider(tier: 'default' | 'fast' | 'complex' | 'local', cfg: ProviderConfig): void {
+    const models = (this.config.models ?? {}) as Record<string, unknown>;
+    const entry: Record<string, unknown> = { provider: cfg.provider, model: cfg.model };
+    if (cfg.api_key) entry.api_key = cfg.api_key;
+    if (cfg.auth_token) entry.auth_token = cfg.auth_token;
+    if (cfg.endpoint) entry.endpoint = cfg.endpoint;
+    models[tier] = entry;
+    this.config.models = models;
+  }
+
+  setTelegram(botToken: string, chatIds: number[]): void {
+    this.config.telegram = { bot_token: botToken, allowed_chat_ids: chatIds };
+  }
+
+  setDiscord(botToken: string, guildIds: string[]): void {
+    this.config.discord = { bot_token: botToken, allowed_guild_ids: guildIds };
+  }
+
+  setSlack(botToken: string, appToken: string, signingSecret: string, channelIds: string[]): void {
+    this.config.slack = { bot_token: botToken, app_token: appToken, signing_secret: signingSecret, allowed_channel_ids: channelIds };
+  }
+
+  setWhatsApp(allowedNumbers: string[]): void {
+    this.config.whatsapp = { allowed_numbers: allowedNumbers };
+  }
+
+  setGatewayPort(port: number): void {
+    const server = (this.config.server ?? {}) as Record<string, unknown>;
+    server.port = port;
+    this.config.server = server;
+  }
+
+  setGatewayToken(token: string): void {
+    const server = (this.config.server ?? {}) as Record<string, unknown>;
+    server.token = token;
+    this.config.server = server;
+  }
+
+  setGatewayLock(enabled: boolean): void {
+    const server = (this.config.server ?? {}) as Record<string, unknown>;
+    server.lock = enabled;
+    this.config.server = server;
+  }
+
+  setTailscaleServe(enabled: boolean): void {
+    const server = (this.config.server ?? {}) as Record<string, unknown>;
+    const tailscale = (server.tailscale ?? {}) as Record<string, unknown>;
+    tailscale.serve = enabled;
+    server.tailscale = tailscale;
+    this.config.server = server;
+  }
+
+  setMemoryEmbedding(cfg: EmbeddingConfig): void {
+    const memory = (this.config.memory ?? {}) as Record<string, unknown>;
+    const embedding: Record<string, unknown> = { enabled: true, provider: cfg.provider };
+    if (cfg.api_key) embedding.api_key = cfg.api_key;
+    if (cfg.endpoint) embedding.endpoint = cfg.endpoint;
+    memory.embedding = embedding;
+    this.config.memory = memory;
+  }
+
+  setSandboxEnabled(enabled: boolean): void {
+    this.config.sandbox = { enabled };
+  }
+
+  setPairingEnabled(enabled: boolean): void {
+    this.config.pairing = { enabled };
+  }
+
+  setToolProfile(profile: string): void {
+    this.config.tools = { profile };
+  }
+
+  setWebhooksEnabled(secret?: string): void {
+    const automation = (this.config.automation ?? {}) as Record<string, unknown>;
+    if (secret) {
+      automation.webhooks = [{ name: 'default', secret, message: '{{body}}', output: { channel: 'webchat', peer: 'webhook' }, enabled: true }];
+    } else {
+      automation.webhooks = automation.webhooks ?? [];
+    }
+    this.config.automation = automation;
+  }
+
+  setGmailEnabled(credentialsFile: string, outputChannel: string, outputPeer: string): void {
+    const automation = (this.config.automation ?? {}) as Record<string, unknown>;
+    automation.gmail = { enabled: true, credentials_file: credentialsFile, output: { channel: outputChannel, peer: outputPeer } };
+    this.config.automation = automation;
+  }
+
+  setCronEnabled(): void {
+    const automation = (this.config.automation ?? {}) as Record<string, unknown>;
+    if (!automation.cron) automation.cron = [];
+    this.config.automation = automation;
+  }
+
+  build(): Record<string, any> {
+    return structuredClone(this.config) as Record<string, any>;
+  }
+
+  toYaml(): string {
+    return stringify(this.config, { lineWidth: 120 });
+  }
+}