You build client projects with Claude Code or Cursor, which means you now ship in weeks what used to take a quarter. Your client cannot tell the difference between your work and anyone else’s, until the delivery. That is the moment this page is about.
A freelance engagement ends in one of two ways. The client receives the project, runs it, understands what they got, and pays with the warm feeling that they chose well. Or they receive a repository and a login, feel the low hum of not knowing what they just paid for, and convert that feeling into three weeks of anxious messages that eat your margin and your appetite for the next job with them.
The difference between those endings is rarely code quality. The client cannot see code quality. It is whether the delivery carried its own evidence: proof it runs, a map of what it contains, an honest list of what remains open. Freelancers using AI agents feel this sharper than anyone, because the client has read the same headlines you have, and some of them now arrive pre-loaded with the question did the AI really do this right.
In the closing week, run the free CLI against the finished project. It reads the repository and your agent sessions, executes install, build and tests in a clean sandbox, and produces a project passport where every statement is labelled by its evidence. Fix what it surfaces while fixing is cheap. Then publish the passport and send the link with the delivery:
The client opens a document written for them, plain labels first, with a page that explains exactly what they are looking at and how to re-check the whole thing themselves with one command. You have replaced trust me with check me, which lands very differently in a final invoice email.
For the client who has been burned before, or whose investor asks pointed questions, add a Mantyl Verified run: your checks re-executed on infrastructure you do not control, signed, with the mark rendered on the hosted passport. It costs £19 to £49 once, which prices comfortably inside a line item, and it is the difference between the freelancer says it works and a third party proved it reproduces. Some freelancers bill it through with a small margin as delivery verification; clients rarely query the best-value line on the invoice.
The second delivery with a passport is worth more than the first, because now it is your standard, and clients talk. The freelancers who win referral work in this market are not the ones claiming their AI use is invisible; they are the ones whose deliveries visibly survive scrutiny. Your process for getting there is the AI code handover guide and the handover checklist; the items about credentials and support boundaries matter as much as the code. And if your practice is growing into a team, the agency version of this page is where this goes next.