Practical prompt engineering tips from a heavy Claude user: cut the pleasantries, frontload context, use unreasonable specificity, and let examples talk.
I built Screenshooter, a client-side screenshot styling tool, by vibe-coding with Copilot Agent Mode - the kind of side project that only makes sense in 2025.
A complete, working PHP example for generating GitHub App JWTs with lcobucci/jwt, including the Unix timestamp formatting quirk that trips everyone up.