I spent years watching good agencies get burned by the same thing. A team wins more work than it can handle, brings in outside help, and the help falls through: a missed deadline, a job that needs redoing, a developer who goes quiet. The subcontractor never faces the client. The agency does.
Small agencies have it harder. There’s no budget for another developer or a bigger office, and the work never arrives at an even pace. Hire for the peak and you pay for the quiet. So they stretch, and the first story begins.
Your client should never feel the gap between what you promised and who’s building it.
I started Coderlift for those agencies. We’re the capacity you call when the work is there, and don’t carry when it isn’t. You keep the client. We stay out of sight.