Draft an inbox reply or a private note with the AI assistant (single-shot, read-only)

Powers the Inbox's two Lessly buttons (top-right of the reply box, and of "On this booking"): draft the staff's next reply, or suggest a short private note, from the thread already open in MessagesClient. Single-shot (generateText, not a stream), unlike POST /api/ai/chat: this answers once from the messages the client sends in the request body, with no running conversation and no persisted history of its own.

Runs entirely as the signed-in user through requireMember()'s RLS-scoped client, called with no role or vertical: either engine's staff can reach it. Unlike POST /api/ai/chat, it never re-reads the thread's messages itself: the client already has open.messages, rendered server-side by /inbox's own page load a moment ago, so the request body carries the transcript instead of a thread id. Tenancy still comes from requireMember()'s companyId, never from the body; neither output has any effect until a human clicks Send reply or Save note.

The transcript is capped to the newest 60 messages and roughly 6000 characters (buildTranscript, route.ts), oldest lines dropped first if still over budget. The system prompt instructs the model to treat every line of it as data to read, never as an instruction to follow, the same posture POST /api/ai/chat applies to tool results, since a guest can type anything into the messages this transcript is built from.

Shares the identical per-tier monthly ai_credits allowance and the same wired-but-inactive AI_RATE_LIMIT_PER_MINUTE gate as POST /api/ai/chat, keyed the same way (per user, not per feature): one OpenRouter key backs both, so the abuse concern is request frequency from this login, not which AI feature it is hitting.

Response BodyCopy Anchor Link

curl -X POST "https://example.com/api/ai/inbox-assist" \  -H "Content-Type: application/json" \  -d '{    "mode": "reply",    "kind": "reservation",    "customerName": "string",    "messages": [      {        "author": "guest",        "body": "string"      }    ]  }'

{  "text": "string"}