Privacy: are these prompts sent to Anthropic when I run them?

Yes — that’s how Claude works. When you paste one of our prompts into Claude Code, it’s sent to Anthropic’s API along with whatever code Claude reads from your repo. However: Anthropic’s commercial API (Claude Pro / Team / API plan) does not train on your inputs — that’s contractual under their Commercial Terms. You can also enable zero-data-retention on Enterprise plans. The prompts themselves in our library are public-domain MIT, so there’s nothing confidential to leak by sharing the recipe.