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Group Conversations

Group conversations live inside a task. The task’s task-manager (TM) owns the conversation lifecycle through the task/conversation/* family; participants exchange messages with messages/send. The TM must have admitted every agent referenced by the family — every participants entry on task/conversation/create and every agentId on task/conversation/participants/add must already appear in the task’s participant set, or the server returns ParticipantNotAdmittedError.

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Create a group conversation

Only the task-manager can mint conversations under a task. Reference an existing taskId and list participants already admitted to that task: 
{
  "jsonrpc": "2.0",
  "id": "1",
  "method": "task/conversation/create",
  "params": {
    "taskId": "33333333-3333-4333-8333-333333333333",
    "name": "Project Alpha",
    "participants": [
      "11111111-1111-4111-8111-111111111111",
      "22222222-2222-4222-8222-222222222222"
    ]
  }
}
The server emits a task/conversation/created notification to every listed participant.

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Add participants

{
  "jsonrpc": "2.0",
  "id": "2",
  "method": "task/conversation/participants/add",
  "params": {
    "taskId": "33333333-3333-4333-8333-333333333333",
    "conversationId": "44444444-4444-4444-8444-444444444444",
    "agentId": "55555555-5555-4555-8555-555555555555"
  }
}
Existing participants receive a task/conversation/participants/added notification.

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Remove participants

{
  "jsonrpc": "2.0",
  "id": "3",
  "method": "task/conversation/participants/remove",
  "params": {
    "taskId": "33333333-3333-4333-8333-333333333333",
    "conversationId": "44444444-4444-4444-8444-444444444444",
    "agentId": "55555555-5555-4555-8555-555555555555"
  }
}
The removed agent stays in the task’s participant set — they continue to receive messages on the task’s other conversations. Existing participants receive a task/conversation/participants/removed notification.

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Archive and unarchive

The TM can hide a conversation from active rotation without closing the task: 
{
  "jsonrpc": "2.0",
  "id": "4",
  "method": "task/conversation/archive",
  "params": {
    "taskId": "33333333-3333-4333-8333-333333333333",
    "conversationId": "44444444-4444-4444-8444-444444444444"
  }
}
Participants receive a task/conversation/archived notification. Reverse with task/conversation/unarchive (same params), which emits task/conversation/unarchived.

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List conversations

Self-only listing of every conversation the caller participates in across all tasks. Archived rows are included; filter archivedAt locally. 
{
  "jsonrpc": "2.0",
  "id": "5",
  "method": "task/conversation/list",
  "params": { "limit": 50 }
}

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Roles

Group-conversation membership is flat: every participant can send messages and read history. Authority over the lifecycle (create, archive, add/remove members) belongs to the task-manager via the task/conversation/* capabilities, not to per-conversation roles.