Windows 95 desktop · claude-haiku-5.5

Output generated Cost / run $0.0137 Runtime 91.2s

Prompt for this run

Build a Windows 95-style desktop interface using HTML, CSS, and JavaScript. Use HTML, CSS, and JavaScript as needed. Write it to `index.html` in the current working directory using your file tools. Inline your own CSS and JavaScript. Do not use external assets, CDNs, or network requests. No third-party libraries are provided. Required behavior: - Show desktop icons for Notepad and About, a taskbar, a Start button/menu, and a clock that updates to the local time. - Double-clicking an icon or selecting its Start-menu item opens the corresponding window. Notepad contains an editable text area; About contains a short information panel. - Windows can be dragged by their title bars, focused by clicking, and closed. The focused window appears in front. Closing and reopening an application must work; retaining Notepad text during the session is optional. - Each open application appears in the taskbar. Clicking its taskbar entry brings its window to the front. The Start menu opens and closes and dismisses after launching an application. - Keep title bars reachable within the desktop. Use CSS and inline drawings for the retro chrome and icons; no external assets. Verify: Open Notepad through the Start menu, enter text, and drag its title bar. Open About and switch focus using a taskbar entry. Check that the selected window comes to the front and that closing a window removes its taskbar entry.

⛨ sandboxed Open in new tab ↗

TAKE IT TO CODE

A single self-contained HTML file — copy it and open in any browser, or reuse the prompt with your own pi-agent run.

RUN

modelclaude-haiku-5.5

vendorAnthropic · Claude

harnesspi 0.87.1 · browser iteration

generated2026-10-14

METRICS

runtime91.2s

tokens in153k

tokens out13k

cached101k

cost / run$0.0137

Transcript · 28 messages

system

user

assistant

thinking

I'll write the index.html file directly, planning a desktop with icon shortcuts for Notepad and About, a bottom taskbar with a Start button, task buttons, and a clock, plus a Start menu that closes on outside clicks and draggable windows for each app.

Writing HTML structure...

Now I'm sketching the JS architecture: an apps registry defining each window's title and content, an openWins map tracking active windows, and functions for opening, focusing, and closing apps with z-index management and taskbar button syncing. Notepad content persists in a shared variable so switching windows doesn't lose typed text, and I'm setting up the dragging logic by capturing pointer events on the titlebar.

Dragging needs clamping so windows can't be dragged fully off-screen, keeping the titlebar always reachable. I'm handling the start menu toggle with outside-click dismissal, icon selection and double-click to open, window focus-on-click using capture, and inline SVG icons for notepad and about.

→ write /tmp/job-AsIrPL/index.html (19232 bytes)

→ browser {"action":"reload"}

→ browser {"action":"screenshot"}

toolResult

Successfully wrote to /tmp/job-AsIrPL/index.html

toolResult

Frame 1, +0ms

[Browser image supplied to model]

{"console":["warning: An iframe which has both allow-scripts and allow-same-origin for its sandbox attribute can escape its sandboxing."],"dom":"Notepad\nAbout\nStart\n2:35 AM","images":"attached"}

toolResult

Frame 1, +0ms

[Browser image supplied to model]

{"console":["warning: An iframe which has both allow-scripts and allow-same-origin for its sandbox attribute can escape its sandboxing."],"dom":"Notepad\nAbout\nStart\n2:35 AM","images":"attached"}

assistant

thinking

The desktop renders fine and that console warning is just from the sandbox, not an issue with my code. Now I want to test the actual flows - opening the start menu, launching Notepad, typing, dragging windows, checking the about page, switching via taskbar, and closing - but I'm not sure of exact coordinates for the start menu items, so I'll click Start and take a screenshot to inspect the layout first.

Checking the taskbar button click logic - clicking an already-active taskbar item should minimize the window, which looks correct, and the mousedown handler properly calls restoreApp and focusApp. Let's run a quick test pass now.

The desktop renders with both icons, the taskbar, Start, and the clock. The console warning comes from the browser sandbox, not from the page code. Next I'll run the Start-menu flow.

→ browser {"action":"click","x":38,"y":783}

→ browser {"action":"screenshot"}

toolResult

Frame 1, +0ms

[Browser image supplied to model]

{"console":["warning: An iframe which has both allow-scripts and allow-same-origin for its sandbox attribute can escape its sandboxing."],"dom":"Notepad\nAbout\nWindows 95\nNotepad\nAbout\nStart\n2:35 AM","images":"attached"}

toolResult

Frame 1, +0ms

[Browser image supplied to model]

assistant

thinking

With the Start menu open, I'll click Notepad in the menu to launch it, then check that the window opens and a taskbar entry appears.

The Start menu opens with Notepad and About. Next I'll launch Notepad from it.

→ browser {"action":"click","x":96,"y":664}

→ browser {"action":"screenshot"}

toolResult

Frame 1, +0ms

[Browser image supplied to model]

{"console":["warning: An iframe which has both allow-scripts and allow-same-origin for its sandbox attribute can escape its sandboxing."],"dom":"Notepad\nAbout\nUntitled - Notepad\n✕\nFile\nEdit\nSearch\nHelp\nStart\nUntitled - Notepad\n2:35 AM","images":"attached"}

toolResult

Frame 1, +0ms

[Browser image supplied to model]

assistant

thinking

Notepad's open with a taskbar entry showing. I still have a few more checks to do—typing text, dragging the title bar, checking the About dialog, and closing it—but time's limited, so I'll click the textarea, type something, then drag the window to a new position before taking a screenshot.

Notepad opened from the Start menu with a taskbar entry. Next I'll type into it and drag the title bar.

→ browser {"action":"click","x":250,"y":150}

→ browser {"action":"type","text":"Hello from Notepad"}

→ browser {"action":"drag","x":250,"y":43,"toX":350,"toY":143}

→ browser {"action":"screenshot"}

toolResult

Frame 1, +0ms

[Browser image supplied to model]

toolResult

Frame 1, +0ms

[Browser image supplied to model]

toolResult

Frame 1, +0ms

[Browser image supplied to model]

toolResult

Frame 1, +0ms

[Browser image supplied to model]

assistant

thinking

Typing and dragging both work fine. Next I want to open the About window and try switching via the taskbar before closing it, then confirm the Notepad entry still shows as active. I'll double-click to open About, click the Notepad taskbar entry, and take a screenshot to check the result.

Typing and dragging both work. Next I'll open About, then use the taskbar to switch focus back to Notepad.

→ browser {"action":"click","x":55,"y":120}

→ browser {"action":"key","text":"Enter"}

→ browser {"action":"screenshot"}

toolResult

Frame 1, +0ms

[Browser image supplied to model]

toolResult

Frame 1, +0ms

[Browser image supplied to model]

toolResult

Frame 1, +0ms

[Browser image supplied to model]

assistant

thinking

The single click selected the About icon but didn't open it, and Enter does nothing either—it really needs a double-click, which the browser tool doesn't support directly. Since I can't verify double-click behavior through the tool, I'll make sure the icon opening also works via keyboard activation as a fallback.

I'll add a document-level Enter key listener that opens whatever icon is currently selected, making this testable without needing a true double-click. Then I'll click the About icon, press Enter, screenshot, and also check the taskbar Notepad behavior before editing the file.

Clicking the About icon only selected it. The browser tool has no double-click action, so I can't test the dblclick path directly. I'll add an Enter-key shortcut for selected icons so the open path can be exercised.

→ edit

{"path":"/tmp/job-AsIrPL/index.html","oldText":"  desktop.addEventListener('mousedown', function () {","newText":"  document.addEventListene

→ browser {"action":"reload"}

→ browser {"action":"click","x":55,"y":120}

→ browser {"action":"key","text":"Enter"}

→ browser {"action":"screenshot"}

toolResult

Successfully replaced 1 block(s) in /tmp/job-AsIrPL/index.html.

toolResult

Frame 1, +0ms

[Browser image supplied to model]

{"console":["warning: An iframe which has both allow-scripts and allow-same-origin for its sandbox attribute can escape its sandboxing."],"dom":"Notepad\nAbout\nStart\n2:35 AM","images":"attached"}

toolResult

Frame 1, +0ms

[Browser image supplied to model]

{"console":["warning: An iframe which has both allow-scripts and allow-same-origin for its sandbox attribute can escape its sandboxing."],"dom":"Notepad\nAbout\nStart\n2:35 AM","images":"attached"}

toolResult

Frame 1, +0ms

[Browser image supplied to model]

{"console":["warning: An iframe which has both allow-scripts and allow-same-origin for its sandbox attribute can escape its sandboxing."],"dom":"Notepad\nAbout\nStart\n2:35 AM","images":"attached"}

toolResult

Frame 1, +0ms

[Browser image supplied to model]

{"console":["warning: An iframe which has both allow-scripts and allow-same-origin for its sandbox attribute can escape its sandboxing."],"dom":"Notepad\nAbout\nStart\n2:35 AM","images":"attached"}

assistant

thinking

The reload reset the state as expected, so the Notepad text is gone. But pressing Enter didn't open About—the icon shows selected but no window appeared, which makes me wonder if the key event actually reached the document or got intercepted somewhere along the way.

I'm running low on time, so I should stop testing and report honestly: the Enter-key path for opening About is unverified, as are taskbar switching and close behavior. The file edit itself is saved and in place, so I'll wrap up with a concise, honest summary noting that the Enter-key shortcut addition wasn't demonstrably confirmed working in testing.

I'm stopping here because the time budget is nearly used up. `index.html` is saved in `/tmp/job-AsIrPL/`. **Verified in the browser:** - Initial render: Notepad and About icons, Start button, taskbar, and a clock showing local time (2:35 AM). - Start menu opens and lists Notepad and About. - Launching Notepad from the Start menu opens its window, adds a taskbar entry, and dismisses the menu. - Typing into the Notepad text area works. - Dragging the Notepad title bar moves the window. **Not verified:** - **About window:** I did not confirm it opens. Clicking its icon only selects it. I added an Enter-key shortcut to open the selected icon, but the test after reload showed no window opening, so that path is still unconfirmed. - **Taskbar focus switching:** not tested. The code brings a window to the front when its taskbar button is clicked, but I did not check it. - **Close:** the close button and taskbar-entry removal were not tested. - **Double-click:** the browser tool has no double-click action, so the icon double-click path is untested. - **Clamping on resize:** not tested. One caveat: the reload I used to test the Enter shortcut reset the session, so Notepad's text was lost. That is the optional persistence behavior, not a bug.