# rust-lang/rfcs

RFCs for changes to Rust

Repository: https://github.com/rust-lang/rfcs
Canonical: https://ross.abutalabs.com/products/rfcs
Homepage: https://rust-lang.github.io/rfcs/
Language: Markdown
License: Apache-2.0
License Family: permissive
Topics: rfc, rust, rfc-process
Last push: 2026-08-15T12:46:45+00:00

## Health v2 (maintenance only)
Score: 76/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 97, release rhythm 35, longevity 100
- inputs: {"age_days": 4562, "days_push": 18, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_releases
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 6585, forks 1700 (observed 2026-08-28T04:09:45.469757+00:00)

## What it is
The official repository of Request for Comments (RFC) documents for the Rust programming language, defining the process for proposing substantial changes to Rust, Cargo, and Crates.io. It also renders as the Rust RFC Book, a browsable record of accepted, rejected, and postponed language design proposals.

## Use cases
- propose a new Rust language feature
- read the history of Rust language design decisions
- understand how the Rust RFC process works
- check whether a change needs an RFC or just a PR
- find the status of active Rust RFCs
- learn how Rust community governance works

## When to choose
- you want to propose or review a substantial change to Rust, Cargo, or Crates.io
- you are researching why a Rust feature exists or was rejected
- you want to understand Rust's design and governance process

## When to avoid
- you need a software tool or library rather than design documents
- you want to report a bug or make a minor change to Rust (use the relevant repo's issue tracker or PR workflow)
- you need documentation on how to use Rust rather than how it evolves

## Facets
- artifact type: learning-resource
- maturity: active
- function: documentation
- domain: programming-languages, documentation, developer-tools
- platform: -
- tags: rfc, rust, governance, rfc-process, markdown, community-process, web-server

## Member repositories
- rust-lang/rfcs (main) score 76

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:09:45.469757+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-29T17:43:35.279047+00:00, confidence not recorded.
  - readme: https://github.com/rust-lang/rfcs (fetched 2026-08-28T04:09:45.469757+00:00, sha ba95a0e8354f)
  - homepage: https://rust-lang.github.io/rfcs/ (fetched 2026-08-29T08:39:56.684169+00:00, sha 232b8642a5ca)
- Data as of 2026-08-30T08:39:29.467469+00:00.