# ethereum/consensus-specs

Ethereum Proof-of-Stake Consensus Specifications

Repository: https://github.com/ethereum/consensus-specs
Canonical: https://ross.abutalabs.com/products/consensus-specs
Homepage: https://ethereum.github.io/consensus-specs/
Language: Python
License: CC0-1.0
License Family: permissive
Last push: 2026-08-26T21:19:04+00:00

## Health v2 (maintenance only)
Score: 76/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 99, release rhythm 33, longevity 100
- inputs: {"age_days": 2904, "days_push": 7, "days_rel": 291, "gap_med": 95.5, "n_releases_24m": 3}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 3957, forks 1299 (observed 2026-08-28T04:08:30.517044+00:00)

## What it is
The canonical specification repository for Ethereum's proof-of-stake consensus layer, defining protocol rules for all consensus clients across sequential network upgrades (Phase0 through Fulu and beyond). It also publishes reference test vectors and a Python package for spec building blocks.

## Use cases
- implement an Ethereum consensus client
- verify client conformance against consensus reference tests
- understand how Ethereum proof-of-stake protocol changes work across forks
- track upcoming Ethereum network upgrades like Gloas and Heze
- build tooling that parses or simulates the beacon chain protocol

## When to choose
- you are building or testing an Ethereum consensus-layer client
- you need authoritative, up-to-date protocol rules and test vectors
- you want to research proposed consensus changes or design rationale

## When to avoid
- you need a runnable node or client implementation rather than a specification
- you want execution-layer (EVM) specs, which live in a separate repository
- you need end-user tooling or wallets

## Facets
- artifact type: dataset
- maturity: active
- function: testing, documentation, cryptography, serialization
- domain: blockchain, developer-tools
- platform: python, cross-platform
- tags: ethereum, proof-of-stake, consensus-layer, beacon-chain, specification, reference-tests, ssz, blockchain-clients, cryptocurrency, algorithms

## Member repositories
- ethereum/consensus-specs (main) score 76

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:08:30.517044+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 2026-08-29T18:24:29.060530+00:00, confidence not recorded.
  - readme: https://github.com/ethereum/consensus-specs (fetched 2026-08-28T04:08:30.517044+00:00, sha 75b9a4b5cdab)
  - homepage: https://ethereum.github.io/consensus-specs/ (fetched 2026-08-29T09:18:02.019909+00:00, sha 35b10d517c2a)
- Data as of 2026-08-30T08:39:29.467469+00:00.