{"version":"2.0.59","anchor":"teammate-mailbox-messaging","canonical_anchor":"teammate-mailbox-messaging","heading":"Teammate Mailbox Messaging","tier":null,"area":null,"scope":null,"heads_up":null,"url":"https:\/\/changelogs.core-directive.com\/v\/2.0.59\/e\/teammate-mailbox-messaging","release_url":"https:\/\/changelogs.core-directive.com\/v\/2.0.59","markdown":"### Teammate Mailbox Messaging\n\n**What:** A new messaging system allowing Claude agents to send and receive messages between teammates in multi-agent scenarios.\n\n**How it works:**\n\n- Mailbox stored at `.claude\/mailbox` (`BH5` variable at line 344469)\n- Messages formatted as `<teammate-message teammate_id=\"...\">` (line 344461)\n- Supports read\/unread tracking with `AY2()` function at line 344440\n- Messages delivered as attachments of type `teammate_mailbox` (line 345180)\n\n**Details:**\n\n- `vH5()` function at line 345163 checks for unread messages\n- `QY2()` function at line 344459 formats messages for delivery\n- `eI2()` function at line 344437 filters for unread messages only\n- **Evidence**: New in v2.0.59 - no matches found in v2.0.58"}