diff --git a/src/__tests__/unit/provider-preset.test.ts b/src/__tests__/unit/provider-preset.test.ts
index 10c4135f..8c21ffb1 100644
--- a/src/__tests__/unit/provider-preset.test.ts
+++ b/src/__tests__/unit/provider-preset.test.ts
@@ -1,6 +1,14 @@
 import { describe, it } from 'node:test';
 import assert from 'node:assert/strict';
-import { VENDOR_PRESETS, PresetSchema, getDefaultModelsForProvider, getEffectiveProviderProtocol, isValidProtocol } from '../../lib/provider-catalog';
+import {
+  VENDOR_PRESETS,
+  PresetSchema,
+  findMatchingPresetForRecord,
+  getDefaultModelsForProvider,
+  getEffectiveProviderProtocol,
+  isValidProtocol,
+} from '../../lib/provider-catalog';
+import { getProviderCompat } from '../../lib/runtime-compat';
 
 describe('Preset Schema Validation', () => {
   for (const preset of VENDOR_PRESETS) {
@@ -85,6 +93,35 @@ describe('Preset Schema Validation', () => {
     assert.notEqual(p!.sdkProxyOnly, true, 'openai-compatible uses the AI SDK path, not the Claude Code subprocess');
     assert.notEqual(p!.meta?.claudeCodeVerified, true, 'claudeCodeVerified is only meaningful for anthropic presets');
   });
+
+  it('atlascloud preset uses the OpenAI-compatible runtime path with live-verified defaults', () => {
+    const p = VENDOR_PRESETS.find(v => v.key === 'atlascloud');
+    assert.ok(p, 'Atlas Cloud preset must exist');
+    assert.equal(p!.protocol, 'openai-compatible');
+    assert.equal(p!.authStyle, 'api_key');
+    assert.equal(p!.baseUrl, 'https://api.atlascloud.ai/v1');
+    assert.deepEqual(p!.fields, ['api_key']);
+    assert.equal(p!.sdkProxyOnly, undefined, 'Atlas Cloud uses the AI SDK path, not the Claude Code subprocess');
+    assert.equal(p!.defaultRoleModels?.default, 'qwen/qwen3.5-flash');
+    assert.equal(p!.defaultRoleModels?.reasoning, 'deepseek-ai/deepseek-v4-pro');
+    assert.deepEqual(
+      p!.defaultModels.map(m => m.modelId),
+      ['qwen/qwen3.5-flash', 'deepseek-ai/deepseek-v4-pro'],
+    );
+
+    const models = getDefaultModelsForProvider('openai-compatible', 'https://api.atlascloud.ai/v1');
+    assert.deepEqual(models.map(m => m.modelId), ['qwen/qwen3.5-flash', 'deepseek-ai/deepseek-v4-pro']);
+
+    const match = findMatchingPresetForRecord({
+      provider_type: 'openai-compatible',
+      base_url: 'https://api.atlascloud.ai/v1',
+    });
+    assert.equal(match?.key, 'atlascloud');
+    assert.equal(
+      getProviderCompat({ provider_type: 'openai-compatible', base_url: 'https://api.atlascloud.ai/v1' }),
+      'codepilot_only',
+    );
+  });
 });
 
 describe('toClaudeCodeEnv: env shape after CLAUDE_CODE_PROVIDER_MANAGED_BY_HOST removal', () => {
diff --git a/src/lib/provider-catalog.ts b/src/lib/provider-catalog.ts
index 1326ebf0..56489f74 100644
--- a/src/lib/provider-catalog.ts
+++ b/src/lib/provider-catalog.ts
@@ -616,6 +616,38 @@ export const VENDOR_PRESETS: VendorPreset[] = [
     },
   },
 
+  // ── Atlas Cloud ──
+  {
+    key: 'atlascloud',
+    name: 'Atlas Cloud',
+    description: 'Atlas Cloud OpenAI-compatible chat API (CodePilot / Codex runtimes)',
+    descriptionZh: 'Atlas Cloud OpenAI 兼容聊天 API（用于 CodePilot / Codex 运行时）',
+    protocol: 'openai-compatible',
+    authStyle: 'api_key',
+    baseUrl: 'https://api.atlascloud.ai/v1',
+    defaultEnvOverrides: {},
+    defaultModels: [
+      { modelId: 'qwen/qwen3.5-flash', displayName: 'Qwen3.5 Flash' },
+      {
+        modelId: 'deepseek-ai/deepseek-v4-pro',
+        displayName: 'DeepSeek V4 Pro',
+        role: 'reasoning',
+        capabilities: { reasoning: true },
+      },
+    ],
+    defaultRoleModels: {
+      default: 'qwen/qwen3.5-flash',
+      reasoning: 'deepseek-ai/deepseek-v4-pro',
+    },
+    fields: ['api_key'],
+    iconKey: 'server',
+    meta: {
+      apiKeyUrl: 'https://www.atlascloud.ai/console/api-keys',
+      docsUrl: 'https://api.atlascloud.ai/v1',
+      billingModel: 'pay_as_you_go',
+    },
+  },
+
   // ── OpenRouter ──
   {
     key: 'openrouter',