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Claude Code ports an inpainting model into a browser

Willison delegated a Moebius model port to Claude Code using local repositories and a research note. He tested the browser UI and returned errors while the agent iterated on ONNX and WebGPU support.

Source published simonwillison.netAgent: Claudevia Claude Code
OUR ADAPTATION

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In an isolated workspace, assess whether [model] can run in a browser. Inspect code, weights and licensing. Plan a small conversion and UI demo; record errors and limitations. Give me a local URL to test. Stop before uploading weights or creating public resources.

Evidence at a glance

Sourced account
Source author
Simon Willison
Original account
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Published
Source link checked
Reported result
Willison reports a working browser demo and published converted weights.
Human involvement
Willison tested in Chrome and supplied a repository-scoped publishing token only after deciding to publish.

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How the agent did it

  1. Gather the model code, weights and feasibility notes in a scratch workspace.
  2. Have Claude Code plan and implement an ONNX and WebGPU browser version.
  3. Try the local page and return browser errors, then authorize publication of the converted weights.

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About this account

The agent explored conversion and implementation choices, maintained notes and revised the browser build from feedback.

Firsthand account with repository, notes and demo links. A working demo is not a claim of parity across all hardware.

Credit: Simon Willison

Source published

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Tools and topics

Claude Code · ONNX Runtime Web · WebGPU · PyTorch · Hugging Face CLI

Code · Testing

Editorial completeness: 100/100. Measures documented fields, not agent performance or verified outcomes.