---
title: "Rfc Lineage"
method: GET
path: "/specs/rfc/{rfc}/lineage"
tags: ["impact"]
---

# Rfc Lineage

`GET /specs/rfc/{rfc}/lineage`

## Request

- Base URL: `https://api.specproof.ai` (the document declares no server; this is the origin it was published from)
- URL: `https://api.specproof.ai/specs/rfc/{rfc}/lineage`
- Auth: none declared

An RFC's change history. RFCs are immutable — they are never revised, only obsoleted or
updated by other RFCs — so this graph, not a version diff, IS their revision history.

Returns the four directions (what it obsoletes/updates, and what obsoletes/updates it) plus
this org's tests written against it, so an obsoleted RFC surfaces as work to do.

## Path parameters

- `rfc` string, required

## Headers

- `X-Org-Id` string, nullable
- `authorization` string

## Response `200`

Successful Response

- unknown

## Other responses

- `422`: Validation Error

---

[API](https://skmtc.dev/specproof/apis/specproof-portal-api.md) · [All operations](https://skmtc.dev/specproof/apis/specproof-portal-api/llms.txt) · [OpenAPI document](https://skmtc.dev/specproof/apis/specproof-portal-api/revisions/228b03caa929?raw)