Rails 8.2 adds fallback reads for RAILS_MASTER_KEY

Rails main lets ActiveSupport::EncryptedFile try comma-separated keys when decrypting, including keys supplied through RAILS_MASTER_KEY . This is unreleased Rails 8.2 development functionality ; Rails 8.1.4 still expects a single key. Successful fallback reads do not establish support for multi-key writes or a complete credentials-editing workflow. Try fallback reads with a disposable file This standalone example generates its own keys and uses a separate example variable. It does not load ap...