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, and publishes a step-library README the team greps for "is there already a step for X?" before authoring new ones. Use when a BDD project's step count grows past ~50, on a quarterly step-library review, or when a new engineer cannot find an existing step and is about to write a duplicate.