n8n Validation Guide — Error Catalog, Profiles, and False Positives

Expert guide to interpreting n8n validation output: error severity levels (errors block, warnings don't), the iterative validation loop (2–3 cycles typical), and the 4 validation profiles (minimal / runtime / ai-friendly / strict). Documents 9 error types with frequencies — missing_required (45%), invalid_value (28%), type_mismatch (12%) — and identifies which 40% of warnings are false positives safe to ignore.