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ai-teacher/specs/004-rag-retrieval-quality/contracts/topics-api.md
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2026-04-07 22:39:28 +02:00

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# API Contract: Topics — Summary Persistence
**Base path**: `/api/v1/topics`
---
## Existing endpoint (unchanged behaviour, extended response)
### `POST /api/v1/topics/{id}/summary`
Generates a new summary for the topic, **persists it**, and returns it.
**Path param**: `id` — topic id (e.g. `intracranial-aneurysms`)
**Response** `200 OK`:
```json
{
"id": "3fa85f64-5717-4562-b3fc-2c963f66afa6",
"summaryNumber": 3,
"topicId": "intracranial-aneurysms",
"topicName": "Intracranial Aneurysms",
"summary": "## Key Points\n...",
"sources": [
{ "bookId": "uuid", "bookTitle": "Youmans & Winn", "page": 142 }
],
"generatedAt": "2026-04-07T10:23:00Z"
}
```
**Error responses**:
- `404 Not Found` — topic id does not exist
- `503 Service Unavailable` — no books ready (existing `NoKnowledgeSourceException`)
---
## New endpoints
### `GET /api/v1/topics/{id}/summaries`
Returns the list of saved summaries for a topic (no full text — list metadata only).
**Path param**: `id` — topic id
**Response** `200 OK`:
```json
[
{ "id": "uuid-1", "summaryNumber": 1, "generatedAt": "2026-04-06T08:00:00Z" },
{ "id": "uuid-2", "summaryNumber": 2, "generatedAt": "2026-04-06T09:15:00Z" }
]
```
Ordered ascending by `summaryNumber`. Empty array if no summaries saved yet.
**Error responses**:
- `404 Not Found` — topic id does not exist
---
### `GET /api/v1/topics/{id}/summaries/{summaryId}`
Fetches the full content of a specific saved summary.
**Path params**: `id` — topic id, `summaryId` — summary UUID
**Response** `200 OK`: same shape as `POST /summary` response above.
**Error responses**:
- `404 Not Found` — topic or summary not found