Fix local agent deselection

src/__tests__/local-agent-selection.test.ts

@@ -0,0 +1,37 @@
+import { describe, expect, it } from 'vitest';
+import { syncLocalAgentSelection } from '../agent/local-agents.js';
+
+describe('syncLocalAgentSelection', () => {
+  it('disconnects agents omitted from the bulk selection', () => {
+    const connected = new Map([
+      ['codex', { id: 'codex' }],
+      ['hermes', { id: 'hermes' }],
+    ]);
+
+    syncLocalAgentSelection(connected, ['hermes'], true);
+
+    expect([...connected.keys()]).toEqual(['hermes']);
+  });
+
+  it('preserves existing agents for an additive single-agent connect', () => {
+    const connected = new Map([
+      ['codex', { id: 'codex' }],
+      ['hermes', { id: 'hermes' }],
+    ]);
+
+    syncLocalAgentSelection(connected, ['hermes'], false);
+
+    expect([...connected.keys()]).toEqual(['codex', 'hermes']);
+  });
+
+  it('disconnects every agent when the bulk selection is empty', () => {
+    const connected = new Map([
+      ['codex', { id: 'codex' }],
+      ['hermes', { id: 'hermes' }],
+    ]);
+
+    syncLocalAgentSelection(connected, [], true);
+
+    expect(connected.size).toBe(0);
+  });
+});