A Nextflow run can finish cleanly and still use the wrong samples, a moving reference, or an unsafe resume. This skill starts with those failure modes.
It turns a bioinformatics pipeline requirement into explicit input and channel contracts, a DSL2 workflow plan, pinned containers and references, bounded resource rules, and a test ladder that includes partial and recovery paths. The final handoff separates proposed code from executed evidence and uses the narrowest honest verdict: blocked, ready for implementation, ready for a pilot, or ready for release.
It covers pipeline engineering and reproducibility. Scientific interpretation, clinical validation, and permission to move sensitive data stay with the qualified owners.