Keeps a BDD step-definition library DRY across a Cucumber / Behave / Reqnroll project - inventories every step definition, detects duplicates (different patterns matching the same intent), recommends canonical consolidations, reorganizes steps by domain, publishes a step-library README the team greps for "is there already a step for X?" before authoring new ones, and builds a scenario coverage map that fingerprints new Gherkin scenarios against the live suite to classify each as duplicate, partial overlap, or genuine gap before any test is authored. Use when a BDD project's step count grows past ~50, on a quarterly step-library review, when a new engineer is about to write a duplicate step, or when fresh .feature files need a covered-already check.