CircleCI Config Overview Use this skill to improve CircleCI performance and stability without changing product behavior. Focus on measured bottlenecks first, then implement the smallest safe config changes with clear validation criteria. Read when the request involves , , , , cache key design, dependency caching, lockfiles, or complaints about low cache hit rates, oversized caches, or wasted persistence steps. Read when the request involves choosing between caches, workspaces, and artifacts, or when data is being moved between jobs inefficiently. Read when the request involves slow test jobs,…