GitHub Actions can now restrict cache access with read, write, write-only, or none. This runbook explains why a cache save may warn without failing the job, how June and September 2026 changes affect pull_request_target and issue_comment, and how to split trusted cache priming from read-only consumers.
Read the full runbook: https://codereportglobal.indevs.in/articles/github-actions-cache-mode-fix
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