How do you handle clients who keep changing scope mid-build?

Honestly the platform helps here — I point at the original job post, and anything beyond goes in a follow-up job. Keeps everyone honest.

'Yes, and here's what it costs' is a complete sentence. Never 'yes, but'.

Four clarifications = the discovery phase you skipped. Bill a paid discovery week up front next time, it filters out 90% of this.

I keep a running 'changes' doc and send a one-liner: 'happy to do X, it moves delivery by N days.' Most clients magically decide X isn't that important.