The fastest ways to reach the people who build Churro: email for anything private, GitHub for bugs and ideas.
Write to hello@churro.sh for questions about Churro, running your own cache, press, or anything you'd rather not post in public. We reply in English.
If you think you've found a vulnerability in Churro, in the client, in how results are built or signed, or on this website, please email hello@churro.sh with "security" in the subject line and the steps to reproduce it. Please give us time to fix it before you share it publicly. Don't test against other people's data or with anything that could degrade the cache for others.
Open an issue at github.com/usechurro/churro. Include the output of churro --version and churro stats, your Rust version (rustc --version) and your platform. That is usually enough to tell whether a dependency was expected to come from the cache.