library-advisor

To find relevant Coq standard library lemmas for a list manipulation proof goal, use this Skill to get recommendations on importing the `List` library and applying specific lemmas like `app_length` or `rev_involutive` based on your current proof state.

For Isabelle/HOL arithmetic and set operations, this Skill recommends appropriate standard library theories and lemmas by matching your proof goals against standard library patterns to suggest the exact theories you need to import.

You need to search for standard library lemmas during formal verification when you are stuck on a proof, need library support, or when your proof goals match standard library patterns for list, set, and arithmetic operations.

For proving list concatenation properties in Coq, this Skill recommends importing the `List` library and suggests specific lemmas such as `app_length` along with applicable tactics tailored to your proof goal.