ThreadStartParams

{
    "approvalPolicy": "untrusted",
    "approvalsReviewer": "user",
    "baseInstructions": "string",
    "config": {
        "property1": "string",
        "property2": "string"
    },
    "cwd": "string",
    "developerInstructions": "string",
    "ephemeral": true,
    "model": "string",
    "modelProvider": "string",
    "personality": "none",
    "sandbox": "read-only",
    "serviceName": "string",
    "serviceTier": "string",
    "sessionStartSource": "startup",
    "threadSource": "string"
}