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Agent skill

Lint

by ethereum in ethereum/execution-specs

Run and fix the repository static analysis suite. An agent skill from ethereum/execution-specs.

CC0-1.0Auto-check passedDevelopment

Install Lint

skills CLI
$ npx skills add ethereum/execution-specs --skill lint -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI
$ gh skill install ethereum/execution-specs lint --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy
$ git clone --depth 1 https://github.com/ethereum/execution-specs.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.agents/skills/lint .claude/skills/lint && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Facts

Skill name
lint
GitHub stars
1.2k
Token cost
~286 tokens
SKILL.md length
134 words
Files
1
Skills in repo
13
Repo updated
First seen
Licence
CC0-1.0

At a glance

Run and fix the repository static analysis suite. An agent skill from ethereum/execution-specs.

  • Works in 4 steps: Run the Full Check → Auto-Fix Formatting and Lint Issues → Resolve Remaining Issues Manually → …
  • Tasks that involve Linting and formatting
  • SKILL.md covers Step 1: Run the Full Check, Step 2: Auto-Fix Formatting…, Step 3: Resolve Remaining… and Step 4: Final Verification
  • Calls just

What it does

Lint is an agent skill from ethereum/execution-specs. Run and fix the repository static analysis suite.

Its SKILL.md is about 290 tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.

It sits in Development, covering Linting and formatting and Static analysis and SAST. It works with Ethereum and Ruff. The repository describes itself as: Specification for the Execution Layer. Tracking network upgrades. The licence is CC0-1.0.

When your agent uses it

  • Tasks that involve Linting and formatting
  • Tasks that involve Static analysis and SAST

Example prompts

  • “/lint”

Workflow steps

4 steps, taken from the step headings in SKILL.md.

  1. Run the Full Check
  2. Auto-Fix Formatting and Lint Issues
  3. Resolve Remaining Issues Manually
  4. Final Verification

What it can do on your machine

Read from SKILL.md and the folder at commit dc6d1a5. It shows what the files ask for, not the result of running them.

  • Tool permissions

    Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.

    From allowed-tools in the SKILL.md frontmatter.

  • Runs code

    Shell commands in SKILL.md call:

    • just

    From the folder's file list and the shell code blocks in SKILL.md.

  • Network

    No URLs in SKILL.md.

    From URLs in SKILL.md, links to its own repository left out.

  • Credentials

    Names no API keys, tokens, secrets or passwords.

    From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Lint loads about 286 tokens when it runs. Until then it costs about 14 tokens; SKILL.md has 134 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~14
When it runs · the whole SKILL.md, loaded when a task matches
~286

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check passed

The automated check found no risky patterns in SKILL.md.

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

The full file from ethereum/execution-specs at commit dc6d1a5, republished under its CC0-1.0 licence (© ethereum). 134 words, ~286 tokens.

Download SKILL.mdSave it as .claude/skills/lint/SKILL.md (or your agent's skills folder).
name
lint
description
Run and fix the repository static analysis suite.

Lint

Run the full static analysis suite and fix issues. This matches the CI check on every PR.

Step 1: Run the Full Check

bash
just static

This runs ruff, mypy, codespell, ethereum-spec-lint, and actionlint in one pass. If everything passes, you're done.

Step 2: Auto-Fix Formatting and Lint Issues

If static checks report ruff errors, run the fix recipe first — it resolves most issues automatically:

bash
just fix

Step 3: Resolve Remaining Issues Manually

After auto-fix, re-run to see what's left:

bash
just static
  • Remaining ruff issues: fix manually (auto-fix can't handle all rules)
  • mypy errors: fix type annotations, add missing types, correct signatures
  • codespell errors: fix typos, or add intentional words via just whitelist <word>
  • ethereum-spec-lint errors: fix import isolation violations (see /implement-eip for import rules)
  • actionlint errors: fix workflow YAML issues (see /edit-workflow)

Step 4: Final Verification

Re-run until clean:

bash
just static

© ethereum, CC0-1.0. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

Just SKILL.md in .agents/skills/lint of ethereum/execution-specs.

Open the folder on GitHubat commit dc6d1a5

Compare with similar skills

Lint next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

Lint compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Lint this skillethereum/execution-specs1.2k—~286Automated safety check: PassCC0-1.0
Ship Releaseibuilder/massing122—~2.3kAutomated safety check: PassMIT
Golang Continuous Integrationsamber/cc-skills-golang3.4k—~3.7kAutomated safety check: PassMIT
Golang Continuous Integrationcontext-labs/whip1.1k—~3.5kAutomated safety check: PassMIT
FixBUZZARDGTA/Session-Sniffer104—~2.7kAutomated safety check: PassGPL-3.0
ReviewdogAgentSecOps/SecOpsAgentKit2201 repos~3kAutomated safety check: PassCustom licence

Similar skills

  • Ship Release

    ibuilder/massing

    The Massing release discipline — how to ship a verified, CI-green version-numbered release direct to main.

    122 GitHub stars~2.3k tokensUpdated today
    DevelopmentAuto-check passed

  • Golang Continuous Integration

    samber/cc-skills-golang

    GitHub Actions CI/CD pipeline configuration for Golang projects — workflow files for test, lint, SAST, coverage and vulnerability-scan jobs, Dependabot and Renovate config files, GoReleaser release…

    3.4k GitHub stars~3.7k tokensUpdated 7 days ago
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  • Golang Continuous Integration

    context-labs/whip

    CI/CD with GitHub Actions for Golang — testing, linting, SAST, security scanning, coverage, Dependabot, Renovate, GoReleaser, release pipelines.

    1.1k GitHub stars~3.5k tokensUpdated 4 days ago
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  • Fix

    BUZZARDGTA/Session-Sniffer

    Diagnose and fix Session Sniffer bugs, errors, tracebacks, logs, lint failures, static-analysis findings, test failures, and IDE-reported problems.

    104 GitHub stars~2.7k tokensUpdated today
    DevelopmentAuto-check passed

  • Reviewdog

    AgentSecOps/SecOpsAgentKit

    Automated code review and security linting integration for CI/CD pipelines using reviewdog.

    220 GitHub starsUsed in 1 repo~3k tokens
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  • Glint

    speakeasy-api/gram

    Conventions for authoring or editing analyzers in the glint/ Go static-analysis package — Speakeasy's custom golangci-lint plugin built on go/analysis.

    273 GitHub stars~6.4k tokensUpdated today
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More from ethereum/execution-specs

All 13 skills in this repo

  • Consume Hive

    ethereum/execution-specs

    Run locally filled fixtures against execution clients with a selected Hive simulator and a network client configuration from hive-tests.

    1.2k GitHub stars~1.7k tokensUpdated today
    Auto-check passed

  • Eip Checklist

    ethereum/execution-specs

    Track EIP test coverage with the repository checklist system.

    1.2k GitHub stars~804 tokensUpdated today
    Auto-check passed

  • Fill Tests

    ethereum/execution-specs

    Fill test fixtures with the repository fill command. An agent skill from ethereum/execution-specs.

    1.2k GitHub stars~793 tokensUpdated today
    Auto-check passed

  • Grammar Check

    ethereum/execution-specs

    Audit grammar in documentation and code comments. An agent skill from ethereum/execution-specs.

    1.2k GitHub stars~424 tokensUpdated today
    Auto-check passed

  • Implement Eip

    ethereum/execution-specs

    Implement EIP specification changes using repository conventions.

    1.2k GitHub stars~1.1k tokensUpdated today
    Auto-check passed

  • Pytester

    ethereum/execution-specs

    Write and run isolated pytester-based plugin tests. An agent skill from ethereum/execution-specs.

    1.2k GitHub stars~403 tokensUpdated today
    Auto-check passed

Works with

Categories

Questions about Lint

What does Lint do?

Run and fix the repository static analysis suite. An agent skill from ethereum/execution-specs. Lint is an agent skill from ethereum/execution-specs. Run and fix the repository static analysis suite.

When should I use Lint?

Lint fits situations like: tasks that involve Linting and formatting; tasks that involve Static analysis and SAST.

How do I install Lint in Claude Code?

Run `npx skills add ethereum/execution-specs --skill lint -a claude-code`. Or copy the skill folder (.agents/skills/lint in ethereum/execution-specs) into .claude/skills/lint in your project. Claude Code loads it when a task matches its description.

How do I install Lint in Codex?

Run `npx skills add ethereum/execution-specs --skill lint -a codex`. Or copy the skill folder (.agents/skills/lint in ethereum/execution-specs) into .agents/skills/lint in your project. Codex loads it when a task matches its description.

Can I use Lint in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add ethereum/execution-specs --skill lint -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/lint, .gemini/skills/lint, .github/skills/lint and .opencode/skills/lint in your project.

What does Lint need to run?

Going by SKILL.md and its folder, Lint needs the command-line tools its instructions call (just).

Does Lint access the network?

SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.

Is Lint safe to install?

Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.

What licence does Lint use?

Lint is published under the CC0-1.0 licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Lint use?

About 286 tokens (SKILL.md is roughly 1.1k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.

What are the alternatives to Lint?

Skills that share tags, products or a category with Lint: Ship Release (ibuilder/massing, 122 stars), Golang Continuous Integration (samber/cc-skills-golang, 3.4k stars), Golang Continuous Integration (context-labs/whip, 1.1k stars) and Fix (BUZZARDGTA/Session-Sniffer, 104 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Lint?

ethereum (a GitHub organization) maintains it in ethereum/execution-specs, which has 1,195 GitHub stars. The repository holds 13 skills in this directory. The repository was last updated on October 8, 2026.

Source: ethereum/execution-specs on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.