refactor(worker): extract AgentRuntime interface, shared provider helpers, and adapter registry

apps/agent-worker/tests/unit/agent-runtime.test.ts

@@ -0,0 +1,42 @@
+import { describe, expect, test } from 'vitest';
+
+import type { AgentRuntime } from '../../src/runtime/agent-runtime';
+import type { Claim } from '../../src/runtime/provider';
+import { getAdapter, registerAdapter } from '../../src/runtime/agent-runtime';
+import { isCodexLoginProfile, opencodeModel } from '../../src/runtime/provider';
+
+describe('agent runtime registry', () => {
+  test('registerAdapter/getAdapter resolves a registered runtime', () => {
+    const fake: AgentRuntime = {
+      name: 'codex',
+      prepareAuth: async () => {},
+      runTurn: async () => ({}),
+      abort: async () => {},
+    };
+    registerAdapter('codex', () => fake);
+    expect(getAdapter('codex').name).toBe('codex');
+  });
+
+  test('getAdapter throws for an unregistered runtime', () => {
+    expect(() => getAdapter('opencode')).toThrow(/No agent runtime adapter/);
+  });
+});
+
+describe('shared provider helpers re-exported from runtime/provider', () => {
+  test('isCodexLoginProfile detects opencode login profiles', () => {
+    expect(
+      isCodexLoginProfile({
+        aiProviderProfile: { provider: 'opencode_openai_login' },
+      } as Claim),
+    ).toBe(true);
+    expect(isCodexLoginProfile({} as Claim)).toBe(false);
+  });
+
+  test('opencodeModel prefixes the provider', () => {
+    expect(
+      opencodeModel({
+        aiProviderProfile: { provider: 'anthropic', model: 'claude-x' },
+      } as Claim),
+    ).toBe('anthropic/claude-x');
+  });
+});