redundant-manual-cache-with-setup-action

Respects job/workflow cache-mode: restore-disabled and unknown policies suppress overlap advice. Under read, a manual save-only step is not counted as duplicate work; manual restore can still overlap built-in restore.

Detects jobs that configure a setup action’s built-in dependency cache and also define a matching manual actions/cache layer for the same dependency family.

Why this rule exists:

• overlapping cache strategies can add restore/save overhead and make cache behavior harder to reason about

Current MVP heuristic:

• a job uses an official setup action with visible built-in cache enabled
• the same job also contains a manual actions/cache step for the same dependency family

Typical remediation:

• keep one cache strategy for the same dependency family
• keep the manual cache only if it is covering extra paths that the setup action does not