New: 98,000+ skills indexed from GitHub repos with 100+ stars · every skill safety-checkedBrowse top skillsTop skills
Esc to closeBrowse all skills
Submit a skillBrowse skills
Submit a skillBrowse skills

Agent skill

Grammar Check

by ethereum in ethereum/execution-specs

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

CC0-1.0Auto-check passedWriting & Content

Install Grammar Check

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

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

GitHub CLI
$ gh skill install ethereum/execution-specs grammar-check --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/grammar-check .claude/skills/grammar-check && 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
grammar-check
GitHub stars
1.2k
Token cost
~424 tokens
SKILL.md length
198 words
Files
1
Skills in repo
13
Repo updated
First seen
Licence
CC0-1.0

At a glance

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

  • Works in 6 steps: Missing prepositions ("refer the" →… → Subject-verb disagreement → Missing articles where required → …
  • Tasks that involve Copy editing and proofreading
  • SKILL.md covers Files to Check, What to Detect, What to Ignore and Output Format, plus 2 more sections
  • Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md

What it does

Grammar Check is an agent skill from ethereum/execution-specs. Audit grammar in documentation and code comments.

Its SKILL.md is about 420 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 Writing & Content, covering Copy editing and proofreading and Technical documentation. 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 Copy editing and proofreading
  • Tasks that involve Technical documentation

Example prompts

  • “/grammar-check”

Workflow steps

6 steps, taken from the first numbered list in SKILL.md.

  1. Missing prepositions ("refer the" → "refer to the", "comply the" → "comply with the")
  2. Subject-verb disagreement
  3. Missing articles where required
  4. Incorrect word order
  5. Sentence fragments in documentation
  6. Double words ("the the", "is is")

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

    No scripts in the folder and no shell commands in SKILL.md.

    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

Grammar Check loads about 424 tokens when it runs. Until then it costs about 16 tokens; SKILL.md has 198 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~16
When it runs · the whole SKILL.md, loaded when a task matches
~424

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). 198 words, ~424 tokens.

Download SKILL.mdSave it as .claude/skills/grammar-check/SKILL.md (or your agent's skills folder).
name
grammar-check
description
Audit grammar in documentation and code comments.

Grammar Check

Audit grammar in documentation and code comments.

Files to Check

Check $ARGUMENTS (default: src/). Use Glob to find:

  • **/*.py - check docstrings and # comments only
  • **/*.md - check prose content, skip code blocks

What to Detect

  1. Missing prepositions ("refer the" → "refer to the", "comply the" → "comply with the")
  2. Subject-verb disagreement
  3. Missing articles where required
  4. Incorrect word order
  5. Sentence fragments in documentation
  6. Double words ("the the", "is is")

What to Ignore

  • Code syntax and variable names
  • Technical terms, EIP numbers, hex values
  • Intentional shorthand in inline code comments
  • Content inside code blocks (``` or indented blocks in markdown)
  • URLs and email addresses

Output Format

For each issue, output a clickable link with line number:

path/to/file.md:42 - "original problematic text"
  Suggestion: "corrected text"
  Reason: brief explanation

For issues spanning multiple lines, use range format:

path/to/file.py:15-17 - "multi-line docstring issue"
  Suggestion: "corrected text"
  Reason: brief explanation

Process

  1. Find all matching files
  2. For .md files: check full prose content, skip code blocks
  3. For .py files: extract and check only docstrings (triple-quoted) and # comments
  4. Group findings by file
  5. End with summary: "Found N grammar issues in M files." or "No grammar issues found."

Important

  • Report findings only, do not auto-fix
  • Be conservative: only flag clear errors, not style preferences
  • When uncertain, skip rather than false-positive

© 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/grammar-check of ethereum/execution-specs.

Open the folder on GitHubat commit dc6d1a5

Compare with similar skills

Grammar Check 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.

Grammar Check compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Grammar Check this skillethereum/execution-specs1.2k—~424Automated safety check: PassCC0-1.0
evlog Content Passevloghq/evlog1.9k—~4kAutomated safety check: PassMIT
Evidence-Backed Documentation Writerbgauryy/octocode949—~2kAutomated safety check: PassMIT
Not AIudaysharmadev/Not-Ai132—~4.7kAutomated safety check: PassMIT
Tech Writerstacklok/mecatl250—~2.2kAutomated safety check: PassApache-2.0
Beads Documentation Style Guidegastownhall/beads28k—~3.2kAutomated safety check: PassMIT

Similar skills

  • evlog Content Pass

    evloghq/evlog

    Runs the daily review of evlog's written material: picks the worst-scoring files in one group, rewrites what holds up, and opens a single pull request that reports the changes.

    1.9k GitHub stars~4k tokensUpdated yesterday
    Writing & ContentAuto-check passed

  • Evidence-Backed Documentation Writer

    bgauryy/octocode

    Writes, repairs and copyedits project docs against the Google developer documentation style guide, verifying claims in the repository before stating them.

    949 GitHub stars~2k tokensUpdated today
    DevelopmentAuto-check passed

  • Not AI

    udaysharmadev/Not-Ai

    Edit prose into a clear, specific, source-grounded version that preserves the author's meaning and voice.

    132 GitHub stars~4.7k tokensUpdated 5 days ago
    Writing & ContentAuto-check passed

  • Tech Writer

    stacklok/mecatl

    A skill your agent uses when writing or substantively editing user-facing documentation: drafting a new page, rewriting or restructuring an existing one, adding a major section, or turning…

    250 GitHub stars~2.2k tokensUpdated today
    DevelopmentAuto-check passed

  • Beads Documentation Style Guide

    gastownhall/beads

    Sets the house style for the beads user docs: the canonical concept model, required terminology, prose and diagram conventions, and checks before docs work is done.

    28k GitHub stars~3.2k tokensUpdated today
    Writing & ContentAuto-check passed

  • Technical Writing Standard

    cursor/plugins

    Official

    Applies four layers of technical-writing rules to docs, RFCs, readmes, PR descriptions and commit messages so a tired engineer follows them on the first read.

    10k GitHub starsUsed in 10 repos~2.4k tokens
    Writing & ContentAuto-check passed

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 yesterday
    Auto-check passed

  • Eip Checklist

    ethereum/execution-specs

    Track EIP test coverage with the repository checklist system.

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

  • Implement Eip

    ethereum/execution-specs

    Implement EIP specification changes using repository conventions.

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

  • Write Docstring

    ethereum/execution-specs

    Write specification docstrings using repository conventions.

    1.2k GitHub stars~2.6k tokensUpdated yesterday
    Auto-check passed

Categories

Questions about Grammar Check

What does Grammar Check do?

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

When should I use Grammar Check?

Grammar Check fits situations like: tasks that involve Copy editing and proofreading; tasks that involve Technical documentation.

How do I install Grammar Check in Claude Code?

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

How do I install Grammar Check in Codex?

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

Can I use Grammar Check 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 grammar-check -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/grammar-check, .gemini/skills/grammar-check, .github/skills/grammar-check and .opencode/skills/grammar-check in your project.

What does Grammar Check need to run?

SKILL.md names no scripts, command-line tools or credentials: Grammar Check is instructions for the agent only.

Does Grammar Check 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 Grammar Check 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 Grammar Check use?

Grammar Check 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 Grammar Check use?

About 424 tokens (SKILL.md is roughly 1.7k 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 Grammar Check?

Skills that share tags, products or a category with Grammar Check: evlog Content Pass (evloghq/evlog, 1.9k stars), Evidence-Backed Documentation Writer (bgauryy/octocode, 949 stars), Not AI (udaysharmadev/Not-Ai, 132 stars) and Tech Writer (stacklok/mecatl, 250 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Grammar Check?

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.