feat: add AgentConfigRegistry for named agent configurations

src/agents/registry.test.ts

@@ -0,0 +1,64 @@
+import { describe, it, expect } from 'vitest';
+import { AgentConfigRegistry, type AgentConfig } from './registry.js';
+
+describe('AgentConfigRegistry', () => {
+  describe('register()', () => {
+    it('registers a named agent config', () => {
+      const registry = new AgentConfigRegistry();
+      const config: AgentConfig = { name: 'assistant', systemPrompt: 'Be helpful.' };
+      registry.register(config);
+
+      expect(registry.get('assistant')).toEqual(config);
+    });
+
+    it('throws on duplicate name', () => {
+      const registry = new AgentConfigRegistry();
+      registry.register({ name: 'assistant' });
+      expect(() => registry.register({ name: 'assistant' })).toThrow('already registered');
+    });
+  });
+
+  describe('get()', () => {
+    it('returns undefined for unknown name', () => {
+      const registry = new AgentConfigRegistry();
+      expect(registry.get('nonexistent')).toBeUndefined();
+    });
+  });
+
+  describe('list()', () => {
+    it('returns all registered configs', () => {
+      const registry = new AgentConfigRegistry();
+      registry.register({ name: 'a' });
+      registry.register({ name: 'b' });
+      expect(registry.list().map(c => c.name).sort()).toEqual(['a', 'b']);
+    });
+  });
+
+  describe('loadFromConfig()', () => {
+    it('loads configs from a raw config object', () => {
+      const registry = new AgentConfigRegistry();
+      registry.loadFromConfig({
+        assistant: {
+          system_prompt: 'Be helpful.',
+          model_tier: 'default',
+          tool_profile: 'messaging',
+          sandbox: false,
+        },
+        coder: {
+          model_tier: 'complex',
+          tool_profile: 'coding',
+          sandbox: true,
+        },
+      });
+
+      expect(registry.list()).toHaveLength(2);
+      const assistant = registry.get('assistant')!;
+      expect(assistant.systemPrompt).toBe('Be helpful.');
+      expect(assistant.modelTier).toBe('default');
+      expect(assistant.toolProfile).toBe('messaging');
+
+      const coder = registry.get('coder')!;
+      expect(coder.sandbox).toBe(true);
+    });
+  });
+});