---
title: "Slate Greeting"
method: POST
path: "/chat/threads/{thread_id}/slate-greeting"
tags: ["chat"]
---

# Slate Greeting

`POST /chat/threads/{thread_id}/slate-greeting`

## Request

- Base URL: `https://api.nicheangle.com` (the document declares no server; this is the origin it was published from)
- URL: `https://api.nicheangle.com/chat/threads/{thread_id}/slate-greeting`
- Auth: none declared

Fired when a NORMAL run parks at a checkpoint — the story slate (CP1) or the
angles (CP2). The desk narrates whichever just landed with the engine's counsel,
so the cards don't appear in silence. Idempotent per session+checkpoint (returns
null when nothing applies — intel query, not parked, or already greeted), so the
frontend can call it on every CP1/CP2 edge.

## Path parameters

- `thread_id` string, uuid, required

## Headers

- `authorization` string, nullable

## Response `200`

Successful Response

- unknown

## Other responses

- `422`: Validation Error

---

[API](https://skmtc.dev/nicheangle/apis/signal-api.md) · [All operations](https://skmtc.dev/nicheangle/apis/signal-api/llms.txt) · [OpenAPI document](https://skmtc.dev/nicheangle/apis/signal-api/revisions/ed8b47ff5891?raw)