feat(tui): use configured compaction threshold for /context output

src/frontends/tui/minimal.test.ts

@@ -29,6 +29,7 @@ function asAgent(value: unknown): NativeAgent {
 function minimalTuiPrivates(value: MinimalTui): {
   handleBackendCommand: (provider: string) => Promise<void>;
   handleModelCommand: (tier: string, providerModel?: string) => void;
+  handleContextCommand: () => void;
   handleEscapeAction: () => boolean;
   prompt: (text: string) => Promise<string>;
   rl: {
@@ -43,6 +44,7 @@ function minimalTuiPrivates(value: MinimalTui): {
   return value as unknown as {
     handleBackendCommand: (provider: string) => Promise<void>;
     handleModelCommand: (tier: string, providerModel?: string) => void;
+    handleContextCommand: () => void;
     handleEscapeAction: () => boolean;
     prompt: (text: string) => Promise<string>;
     rl: {
@@ -174,6 +176,43 @@ describe('MinimalTui backend command', () => {
     expect(mockAgent.setModelTier).toHaveBeenCalledWith('local');
   });
 
+  it('uses configured compaction threshold in /context output', () => {
+    const mockSession = {
+      id: 'test',
+      getHistory: () => [{ role: 'user', content: 'x'.repeat(400) }],
+      addMessage: vi.fn(),
+      clear: vi.fn(),
+      replaceHistory: vi.fn(),
+    };
+
+    const mockRouter: TuiRouterStub = {
+      getTier: () => 'default' as const,
+      getAvailableTiers: () => ['default'],
+      setTier: vi.fn(() => true),
+      getLabel: () => 'gpt-4o',
+      getLocalProviderName: () => 'ollama',
+      setLocalClient: vi.fn(),
+      chat: vi.fn(),
+      getClient: vi.fn(),
+    };
+
+    const logSpy = vi.spyOn(console, 'log').mockImplementation(() => {});
+    try {
+      const tui = new MinimalTui({
+        session: asSession(mockSession),
+        modelClient: asRouter(mockRouter),
+        modelRouter: asRouter(mockRouter),
+        systemPrompt: 'test',
+        contextThresholdPct: 67,
+      });
+
+      minimalTuiPrivates(tui).handleContextCommand();
+      expect(logSpy).toHaveBeenCalledWith(expect.stringContaining('compaction threshold: 67%'));
+    } finally {
+      logSpy.mockRestore();
+    }
+  });
+
   it('reuses configured provider credentials for /model <tier> <provider/model>', () => {
     const prevOpenRouterKey = process.env.OPENROUTER_API_KEY;
     delete process.env.OPENROUTER_API_KEY;