feat: add support for Atomic Chat provider

- Introduced a new provider profile for Atomic Chat, allowing it to be used alongside existing providers.
- Updated `package.json` to include a new development script for launching Atomic Chat.
- Modified `smart_router.py` to recognize Atomic Chat as a local provider that does not require an API key.
- Enhanced provider discovery and launch scripts to handle Atomic Chat, including model listing and connection checks.
- Added tests to ensure proper environment setup and behavior for Atomic Chat profiles.

This update expands the functionality of the application to support local LLMs via Atomic Chat, improving versatility for users.

scripts/provider-bootstrap.ts

@@ -10,6 +10,7 @@ import {
   recommendOllamaModel,
 } from '../src/utils/providerRecommendation.ts'
 import {
+  buildAtomicChatProfileEnv,
   buildCodexProfileEnv,
   buildGeminiProfileEnv,
   buildOllamaProfileEnv,
@@ -20,8 +21,11 @@ import {
   type ProviderProfile,
 } from '../src/utils/providerProfile.ts'
 import {
+  getAtomicChatChatBaseUrl,
   getOllamaChatBaseUrl,
+  hasLocalAtomicChat,
   hasLocalOllama,
+  listAtomicChatModels,
   listOllamaModels,
 } from './provider-discovery.ts'
 
@@ -34,7 +38,7 @@ function parseArg(name: string): string | null {
 
 function parseProviderArg(): ProviderProfile | 'auto' {
   const p = parseArg('--provider')?.toLowerCase()
-  if (p === 'openai' || p === 'ollama' || p === 'codex' || p === 'gemini') return p
+  if (p === 'openai' || p === 'ollama' || p === 'codex' || p === 'gemini' || p === 'atomic-chat') return p
   return 'auto'
 }
 
@@ -102,6 +106,21 @@ async function main(): Promise<void> {
         getOllamaChatBaseUrl,
       },
     )
+  } else if (selected === 'atomic-chat') {
+    const model = argModel || (await listAtomicChatModels(argBaseUrl || undefined))[0]
+    if (!model) {
+      if (!(await hasLocalAtomicChat(argBaseUrl || undefined))) {
+        console.error('Atomic Chat is not running (could not connect to 127.0.0.1:1337).\n  Download from https://atomic.chat/ and launch the application.')
+      } else {
+        console.error('Atomic Chat is running but no model is loaded. Open Atomic Chat and download or start a model first.')
+      }
+      process.exit(1)
+    }
+
+    env = buildAtomicChatProfileEnv(model, {
+      baseUrl: argBaseUrl,
+      getAtomicChatChatBaseUrl,
+    })
   } else if (selected === 'codex') {
     const builtEnv = buildCodexProfileEnv({
       model: argModel,