feat: implement PI-090 product tools

tests/unit/pi-event-projector.test.ts

@@ -104,6 +104,56 @@ describe('Pi event projector', () => {
     }));
   });
 
+  it('projects versioned product-tool details and suppresses unknown versions', async () => {
+    const projector = new PiEventProjector({ createId: () => 'unused' });
+    let snapshot = emptySnapshot();
+    snapshot.nodes.push({
+      kind: 'tool', id: 'tool-task-state', toolCallId: 'call-task-state', toolName: 'task_state',
+      title: 'task_state', inputText: '{}', status: 'running', output: [],
+    });
+    snapshot = apply(snapshot, await projector.project(snapshot, {
+      type: 'tool_execution_end',
+      toolCallId: 'call-task-state',
+      isError: false,
+      result: {
+        content: [{ type: 'text', text: 'done' }],
+        details: {
+          schema: 'task-state.v1',
+          tasks: [{ id: 'task-a', title: 'Implement product tools', status: 'complete' }],
+        },
+      },
+    }));
+    expect(snapshot.nodes).toContainEqual(expect.objectContaining({
+      kind: 'tool',
+      id: 'tool-task-state',
+      details: {
+        schema: 'task-state.v1',
+        tasks: [{ id: 'task-a', title: 'Implement product tools', status: 'complete' }],
+      },
+    }));
+
+    snapshot.nodes.push({
+      kind: 'tool', id: 'tool-browser', toolCallId: 'call-browser', toolName: 'agent_browser',
+      title: 'agent_browser', inputText: '{}', status: 'running', output: [],
+    });
+    snapshot = apply(snapshot, await projector.project(snapshot, {
+      type: 'tool_execution_end',
+      toolCallId: 'call-browser',
+      isError: false,
+      result: {
+        content: [{ type: 'text', text: 'RAW_BROWSER_OUTPUT' }],
+        details: { schema: 'agent-browser.v2', attachmentId: 'RAW_ATTACHMENT' },
+      },
+    }));
+    expect(JSON.stringify(snapshot)).not.toContain('RAW_BROWSER_OUTPUT');
+    expect(JSON.stringify(snapshot)).not.toContain('RAW_ATTACHMENT');
+    expect(snapshot.nodes).toContainEqual(expect.objectContaining({
+      kind: 'tool',
+      id: 'tool-browser',
+      output: [expect.objectContaining({ text: 'Tool details are unavailable for this version.' })],
+    }));
+  });
+
   it('keeps one assistant UI identity while content-index deltas become an authoritative message', async () => {
     const projector = new PiEventProjector({
       createId: () => 'assistant-ui-a',