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Hello world. This is the site of Antonio Cheong.
You may know me from:
- Bug bounties, including CVE-2022-26726, a MacOS/IOS privilege escalation exploit for TCC.
- One-click Stable Diffusion on Google Colab from October 2022
- CopilotChat.nvim for which I was the original author from 2023.
- Research on Apple Location Services from May 2024 and analytics during my internship at the University of Cambridge August 2025.
- Various reverse engineering efforts around ChatGPT, Sydney, and Google Bard around 2022-2023 before any APIs were available where my libraries gained over 1M downloads and 40k+ stars total.
- An API compatible implementation of Obsidian Sync during the summer of 2023 derived purely from blindly reverse engineering the client.
- Hackathons I've been to such as Huawei Tech Arena 2024 or Hackeurope (Ireland).
- Around Cardiff, where I studied & play badminton.
I am currently working on a startup in securing the open-source supply chain. More details to be released soon :)
Bored? Check out my blog or photo gallery!
Contact
- Email: Expect a response in 2-3 business days.
- Matrix: I prefer email, but you can call me over Matrix.
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Timezone: UTC


