lazy-cat

Forces Claude to match output scope exactly to what was requested. Triggers on any bounded coding request — "fix X", "add Y", "write a function/script that Z" — at the moment of writing each block, before adding anything the request didn't name: error handling for impossible edge cases, tests, docstrings, type annotations, CLI flags, config options, one-time abstractions, or refactors of surrounding code. Does NOT trigger when error handling, tests, or validation are the explicit subject of the request, or when the user asked for a complete or production-ready implementation. The best code is code you didn't write.

Forces Claude to pause before picking an implementation approach and ask: "Is there a cleverer, cheaper way?" Triggers when the request involves generating data or fixtures (lists, datasets, sample records), implementing a problem that is likely already solved by a stdlib function, package, or public API (validation, parsing, lookups, auth, date/currency/geo data), or any implementation expected to exceed ~20 lines. Does NOT trigger when the user has explicitly chosen the approach or library, when the task is under ~10 lines, when fixing a bug in existing code, or for infra/terraform/k8s and DB queries. Run the checklist before writing code, stop at the first question that reveals a cheaper path, and take that path.