Agent tool to make a browser preview tab the active side-panel tab

[jpsirois]

Problem

In a T3 Code thread, the side panel can hold several tabs. For example, it can show a markdown file tab and a browser preview tab together.

The t3-code MCP server lets an agent open, navigate, and close browser tabs with preview_open, preview_navigate, and t3_preview_close. No tool lets the agent make a tab the active tab in the side panel. The user must click the browser tab to see it.

Steps to reproduce

1. Open a markdown file tab in the side panel of a thread.
2. The agent calls preview_open with url: https://github.com/router-for-me/CLIProxyAPI. The result is tabId: tab_1 and visible: false.
3. The agent calls preview_open with tabId: tab_1 and open: true. The result is visible: true. The side panel still shows the markdown tab.
4. The agent calls preview_open with reuseExistingTab: false. This makes a new tab, tab_3, with visible: false. That tab does not get focus either.

Also, visible: true in step 3 does not match the screen. The tab is not on screen, but the tool reports it as visible.

Requested feature

• Add a tool that makes a given tab the active tab in the side panel. For example: preview_focus(tabId) or t3_preview_activate(tabId). Alternatively, make preview_open with open: true do this.
• Make visible in the preview_open and preview_status results report what the user actually sees on screen.