From c0deeb5cf080b54727962adac52e8445ee6d3311 Mon Sep 17 00:00:00 2001
From: William Valentin <william.valentin.info@gmail.com>
Date: Thu, 5 Feb 2026 00:37:40 -0800
Subject: [PATCH] feat: add TUI entry point with minimal readline mode

---
 package.json |   2 +
 src/tui.ts   | 121 +++++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 123 insertions(+)
 create mode 100644 src/tui.ts

diff --git a/package.json b/package.json
index 5735e2a..31ac74b 100644
--- a/package.json
+++ b/package.json
@@ -8,6 +8,8 @@
     "build": "tsc",
     "dev": "tsx watch src/index.ts",
     "start": "node dist/index.js",
+    "tui": "tsx src/tui.ts",
+    "tui:dev": "tsx watch src/tui.ts",
     "test": "vitest",
     "test:run": "vitest run",
     "lint": "eslint src/",
diff --git a/src/tui.ts b/src/tui.ts
new file mode 100644
index 0000000..38109e0
--- /dev/null
+++ b/src/tui.ts
@@ -0,0 +1,121 @@
+import { loadConfig } from './config/index.js';
+import { SessionStore, SessionManager } from './session/index.js';
+import { AnthropicClient, OpenAIClient, OllamaClient, ModelRouter } from './models/index.js';
+import { MinimalTui } from './frontends/tui/index.js';
+import type { Config } from './config/index.js';
+import { resolve } from 'path';
+import { homedir } from 'os';
+import { existsSync, mkdirSync } from 'fs';
+
+const CONFIG_PATH = process.env.FLYNN_CONFIG
+  ?? resolve(homedir(), '.config/flynn/config.yaml');
+
+const SYSTEM_PROMPT = `You are Flynn, a helpful personal AI assistant. You are direct, concise, and helpful. You can help with a variety of tasks including answering questions, providing information, and having conversations.
+
+Keep responses focused and avoid unnecessary verbosity. Use markdown formatting when it improves readability.`;
+
+function createModelRouter(config: Config): ModelRouter {
+  const models = config.models;
+
+  const defaultClient = new AnthropicClient({
+    model: models.default.model,
+  });
+
+  let fastClient;
+  let complexClient;
+  let localClient;
+
+  if (models.fast) {
+    fastClient = new AnthropicClient({ model: models.fast.model });
+  }
+
+  if (models.complex) {
+    complexClient = new AnthropicClient({ model: models.complex.model });
+  }
+
+  if (models.local) {
+    if (models.local.provider === 'ollama') {
+      localClient = new OllamaClient({
+        model: models.local.model,
+        host: models.local.endpoint,
+      });
+    }
+  }
+
+  const fallbackChain = [];
+  for (const providerName of models.fallback_chain) {
+    if (providerName === 'openai') {
+      fallbackChain.push(new OpenAIClient({ model: 'gpt-4o' }));
+    } else if (providerName === 'local' && localClient) {
+      fallbackChain.push(localClient);
+    }
+  }
+
+  return new ModelRouter({
+    default: defaultClient,
+    fast: fastClient,
+    complex: complexClient,
+    local: localClient,
+    fallbackChain,
+  });
+}
+
+async function main() {
+  console.log('Flynn TUI starting...');
+
+  if (!existsSync(CONFIG_PATH)) {
+    console.error(`Config file not found: ${CONFIG_PATH}`);
+    console.error('Copy config/default.yaml to ~/.config/flynn/config.yaml and configure it.');
+    process.exit(1);
+  }
+
+  const config = loadConfig(CONFIG_PATH);
+
+  // Ensure data directory exists
+  const dataDir = resolve(homedir(), '.local/share/flynn');
+  mkdirSync(dataDir, { recursive: true });
+
+  // Initialize components
+  const sessionStore = new SessionStore(resolve(dataDir, 'sessions.db'));
+  const sessionManager = new SessionManager(sessionStore);
+  const modelRouter = createModelRouter(config);
+
+  // Get TUI session
+  const session = sessionManager.getSession('tui', 'local');
+
+  // Create and start minimal TUI
+  const tui = new MinimalTui({
+    session,
+    modelClient: modelRouter,
+    systemPrompt: SYSTEM_PROMPT,
+    onTransfer: (target) => {
+      if (target === 'telegram') {
+        const telegramUserId = String(config.telegram.allowed_chat_ids[0]);
+        sessionManager.transferSession('tui', 'local', 'telegram', telegramUserId);
+        console.log(`Session transferred to Telegram (${telegramUserId})\n`);
+      } else {
+        console.log(`Unknown transfer target: ${target}\n`);
+      }
+    },
+    onFullscreen: () => {
+      console.log('Fullscreen mode not yet implemented.\n');
+    },
+  });
+
+  // Handle shutdown
+  process.on('SIGINT', () => {
+    tui.stop();
+    sessionStore.close();
+    process.exit(0);
+  });
+
+  await tui.start();
+
+  // Cleanup
+  sessionStore.close();
+}
+
+main().catch((error) => {
+  console.error('Failed to start TUI:', error);
+  process.exit(1);
+});