Prompts that improve prompts: critique against the rules all major labs agree on, ask the questions you forgot, compress without losing force.
Four prompts that turn an unfamiliar codebase into a decision-ready picture: map, debt, dependencies, onboarding.
Spec-driven planning prompts: from high-level intent to a technical plan with gates, scopes, and rollback paths.
Threat-model-first security prompts. "Find all vulnerabilities" fails; a one-line threat model plus a narrow slice finds real CVEs.
Diagnose-first performance prompts: find the actual bottleneck before optimizing anything.
Behavior-preserving refactoring prompts: grade first, then step-by-step improvements that never change what the code does.
Root-cause-first debugging prompts with minimal blast radius. Diagnose before touching anything.
Code review prompts that catch real bugs, not style nits. Constraint-scoped, format-enforced, battle-tested with Claude.