---
title: "Ai Diff"
method: POST
path: "/api/alignment/ai-diff"
tags: ["alignment"]
---

# Ai Diff

`POST /api/alignment/ai-diff`

## Request

- Base URL: `https://fojin.app` (the document declares no server; this is the origin it was published from)
- URL: `https://fojin.app/api/alignment/ai-diff`
- Auth: HTTP bearer

Generate (or fetch cached) cross-canon difference analysis for 2-4 selected chunks.

Public, but each fresh (cache-miss) analysis is a platform LLM call, so it's
rate-limited (STRICT_PATHS) and counts against a per-caller daily quota.

## Request body

- AiDiffRequest
  - `chunks` AiDiffChunk[], required
    - `text_id` integer, required
    - `juan_num` integer, required
    - `chunk_index` integer, required
    - `lang` string, required: One of lzh/pi/sa/bo/en
    - `text` string, required

## Response `200`

Successful Response

- AiDiffResponse
  - `cached` boolean, required
  - `prompt_version` string, required
  - `model` string, required
  - `analysis` object, required

## Other responses

- `422`: Validation Error

---

[API](https://skmtc.dev/fojin/apis/fojin-api-buddhist-digital-text-platform.md) · [All operations](https://skmtc.dev/fojin/apis/fojin-api-buddhist-digital-text-platform/llms.txt) · [OpenAPI document](https://skmtc.dev/fojin/apis/fojin-api-buddhist-digital-text-platform/revisions/969714238c61?raw)