I missed a week, how do I recover without restarting?

Don't restart. The plan is built around artifacts, not days, if you have the artifact, you have the skill. Audit: do you have a working module with a Service Contract, REST + GraphQL transports, and at least one MFTF test? If yes, jump to week 3 (sub-agents). If no, the gap is week 1, go back. Common slip: people skip the MFTF test on day 5 because "it works manually". A week later they break the GraphQL resolver and don't know, the test would have caught it. Do not skip the test; reduce the scope of the test instead (one happy path is fine on day 5).