---
title: "Diff Logic Versions"
method: POST
path: "/api/logic/{logic_id}/versions/diff"
tags: ["Logic Engine"]
---

# Diff Logic Versions

`POST /api/logic/{logic_id}/versions/diff`

## Request

- Base URL: `https://api.agentstack.tech` (the document declares no server; this is the origin it was published from)
- URL: `https://api.agentstack.tech/api/logic/{logic_id}/versions/diff`
- Auth: one of:
  - API key in header `X-API-Key`
  - HTTP bearer

F2.9 — Return a minimal delta between two rule snapshots.

## Path parameters

- `logic_id` string, required: Logic ID

## Headers

- `Idempotency-Key` string

## Request body

- DiffVersionsRequest
  - `a` string, required: Left version id
  - `b` string, required: Right version id

## Response `200`

Successful Response

- unknown

## Other responses

- `400`: Bad Request
- `401`: Unauthorized
- `403`: Forbidden
- `404`: Not Found
- `409`: Conflict
- `422`: Validation Error
- `429`: Too Many Requests
- `500`: Internal Server Error

---

[API](https://skmtc.dev/agentstack/apis/agentstack-core-api.md) · [All operations](https://skmtc.dev/agentstack/apis/agentstack-core-api/llms.txt) · [OpenAPI document](https://skmtc.dev/agentstack/apis/agentstack-core-api/revisions/8ecf3406e74a?raw)