gmail +reply PREREQUISITE: Read for auth, global flags, and security rules. If missing, run to create it. Reply to a message (handles threading automatically) Usage Flags | Flag | Required | Default | Description | |------|----------|---------|-------------| | | ✓ | — | Gmail message ID to reply to | | | ✓ | — | Reply body (plain text, or HTML with --html) | | | — | — | Sender address (for send-as/alias; omit to use account default) | | | — | — | Additional To email address(es), comma-separated | | | — | — | Attach a file (can be specified multiple times) | | | — | — | CC email address(es), c…