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2048 · qwen3.6-35b-a3b

Output generated Cost / run $0.0057 Runtime 69.5s

Prompt for this run

Build a playable 2048 game using HTML elements and CSS with a 4 by 4 board. 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: - Arrow keys slide tiles toward the selected edge. Adjacent equal tiles merge once per tile per move, and the score increases by the value of each new merged tile. - For example, moving [2, 2, 2, 2] left produces [4, 4, 0, 0], not [8, 0, 0, 0]. Moving [2, 2, 4, 0] left produces [4, 4, 0, 0]. These examples describe the move before spawning a new tile. - Start with two tiles. After a move that changes the board, spawn exactly one tile in an empty cell: 2 with 90% probability, otherwise 4. Do not spawn after an unchanged move. - Animate movement and merging without allowing rapid input to corrupt board state. Prevent arrow keys from scrolling the page. - Show score, a win message on reaching 2048, and Game Over only when no valid move remains. Provide New Game to reset board and score; allow continuing after a win. Verify: Play a short sequence of arrow-key moves and check that tiles slide, a valid move adds a tile, and any observed merge updates the score by its merged value. Use New Game and check that the board returns to two tiles with a reset score.

⛨ 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

modelqwen3.6-35b-a3b
vendorQwen
harnesspi 0.87.1 · browser iteration
generated2026-10-14

METRICS

runtime69.5s
tokens in53k
tokens out5.1k
cached20k
cost / run$0.0057
Transcript · 19 messages
system

user

Build a playable 2048 game using HTML elements and CSS with a 4 by 4 board. 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: - Arrow keys slide tiles toward the selected edge. Adjacent equal tiles merge once per tile per move, and the score increases by the value of each new merged tile. - For example, moving [2, 2, 2, 2] left produces [4, 4, 0, 0], not [8, 0, 0, 0]. Moving [2, 2, 4, 0] left produces [4, 4, 0, 0]. These examples describe the move before spawning a new tile. - Start with two tiles. After a move that changes the board, spawn exactly one tile in an empty cell: 2 with 90% probability, otherwise 4. Do not spawn after an unchanged move. - Animate movement and merging without allowing rapid input to corrupt board state. Prevent arrow keys from scrolling the page. - Show score, a win message on reaching 2048, and Game Over only when no valid move remains. Provide New Game to reset board and score; allow continuing after a win. Verify: Play a short sequence of arrow-key moves and check that tiles slide, a valid move adds a tile, and any observed merge updates the score by its merged value. Use New Game and check that the board returns to two tiles with a reset score.

assistant
thinking
The user wants me to build a playable 2048 game in a single index.html file. Let me plan the implementation:

1. HTML structure: 4x4 grid, score display, win/game over messages, New Game button
2. CSS: Styling for tiles with colors based on value, animations for sliding/merging
3. JavaScript: Game logic including:
   - Board state (4x4 array)
   - Arrow key handling (prevent page scroll)
   - Slide and merge logic
   - Tile spawning (90% chance of 2, 10% chance of 4)
   - Score tracking
   - Win detection (reaching 2048)
   - Game Over detection (no valid moves)
   - Input debouncing/throttling to prevent corruption from rapid input
   - New Game reset

Let me build this step by step.
→ write /tmp/job-k0tPq/index.html (11882 bytes)
toolResult

Successfully wrote to /tmp/job-k0tPq/index.html

assistant
thinking
The file was written. Now let me open it in the browser and verify the behavior.
→ browser {"action":"screenshot"}
toolResult

agent produced no index.html

assistant
thinking
Let me check the file path and make sure it's in the right place.
→ bash {"command":"ls -la /tmp/job-k0tPq/index.html"}
toolResult

-rw-r--r-- 1 node node 11882 Oct 14 02:32 /tmp/job-k0tPq/index.html

assistant
thinking
The file exists. Let me open it in the browser.
→ browser {"action":"click","x":600,"y":400}
toolResult

agent produced no index.html

assistant
thinking
Let me try a different approach to open the file.
→ browser {"action":"screenshot"}
toolResult

agent produced no index.html

assistant
thinking
The browser tool seems to be looking for an index.html in the CWD. Let me check the CWD more carefully and see if the file is actually present there.
→ bash {"command":"pwd && ls -la index.html 2>/dev/null || echo \"no index.html in current dir\""}
toolResult

/tmp/job-k0tPqE no index.html in current dir

assistant
thinking
The CWD is `/tmp/job-k0tPqE` but I wrote the file to `/tmp/job-k0tPq`. I need to write it to the correct path.
→ bash {"command":"cp /tmp/job-k0tPq/index.html /tmp/job-k0tPqE/index.html"}
toolResult

(no output)

assistant
thinking
Good, now let me verify and screenshot it.
→ 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":"2048\nScore:\n0\n2\n2\nContinue\nNew Game\nUse arrow keys to play","images":"attached"}

assistant
thinking
Let me review the current state of the game. I can see it has two "2" tiles, a score of 0, and the basic UI elements. Let me inspect the file to understand the implementation and verify the required behaviors.

I need to:
1. Read the current index.html
2. Check that it properly handles:
   - Arrow key sliding/merging
   - Merge scoring
   - Tile spawning (90% 2, 10% 4)
   - New game reset
   - Win/lose conditions
   - Animation and input blocking
   - Score tracking
   - Continue after win

Let me read the file first.

Let me read the current implementation and test it. <tool_code> <read> <file_path>/tmp/job-k0tPqE/index.html</file_path> </read>