ethereum/execution-specs
Specification for the Execution Layer. Tracking network upgrades. observed · 2026-09-03
Health v2 · maintenance only
95/100
- Activity 100
- Release rhythm 87
- Longevity 100
How is this computed?
round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10) — computed 2026-09-03. Adoption (stars, forks) is never an input.
- gap_med: 42
- age_days: 2213
- days_rel: 6
- days_push: 0
- n_releases_24m: 8
Adoption not part of the score
1185 stars · 502 forks observed · 2026-09-03
What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded
An executable Python reference implementation of Ethereum's Execution Layer (EELS), including the EVM and consensus-critical behavior, with test cases that generate fixtures for validating execution clients. It also ships a CLI transition tool (`ethereum-spec-evm`) used in client CI and fuzzing setups.
Use cases
- understand exactly how the Ethereum execution layer behaves
- generate test fixtures to validate an Ethereum execution client
- run an EVM transition tool in client CI
- fuzz Ethereum client implementations against a reference spec
- prototype and review upcoming Ethereum network upgrades
- execute state tests against the EVM specification
When to choose
- you are building or testing an Ethereum execution client and need a canonical reference
- you want a runnable, readable specification of EVM semantics
- you need to track or implement a new Ethereum network upgrade
- you want to generate consensus test fixtures
When to avoid
- you need a production Ethereum node or RPC endpoint
- you want a high-performance EVM implementation
- you only need to send transactions or interact with Ethereum from an app
Facets
library · maturity active
interpreter testing benchmarking fuzzing cli developer-tools blockchain developer-tools testing python windows cli ethereum execution-layer evm executable-specification reference-implementation consensus blockchain-clients test-fixtures transition-tool cryptocurrency algorithms linux macos
1 source
- readme: https://github.com/ethereum/execution-specs · fetched 2026-09-03 · 8646fa80ae94
Member repositories
| Repository | Role | Health v2 |
|---|---|---|
| ethereum/execution-specs | main | 95 |
For agents
markdown · JSON · MCP: product_card(name="ethereum/execution-specs")
Data as of 2026-08-30T08:39:29.467469+00:00 · Report a problem