grammar-check
An agent skill by phuryn, from phuryn/pm-skills. Tags: copy-editing, debugging, documents, office.
What it does
Identify grammar, logical, and flow errors in text and suggest targeted fixes without rewriting the entire text. Use when proofreading content, checking writing quality, or reviewing a draft.
Install
With the skills CLI, which installs into Claude Code, Codex, Cursor and other agents:
npx skills add phuryn/pm-skills --skill grammar-checkOr copy the skill folder into Claude Code's skills directory by hand (~/.claude/skills for every project, or .claude/skills inside one):
git clone --depth 1 https://github.com/phuryn/pm-skills
cp -r pm-skills/pm-toolkit/skills/grammar-check ~/.claude/skills/grammar-checkSafety box score
Grade A, minimal risk: 5 of 100 risk points, rated 2026-10-16. The grade rates what the skill and its scripts can reach on the machine of whoever installs it, across eight categories from shell execution to secrets access. How the score works.
This is a plain markdown proofreading skill: it reviews user-provided text for grammar, logic, and flow and returns suggestions only. It does not ship scripts, touch files, call services, or request secrets; the main consideration is that it is a fully self-contained prompt with a role assignment and response-shaping instructions.
| Category | Level | Why |
|---|---|---|
| Code & shell execution | 0 (none) | No shell commands, code execution, or bundled scripts are present; the skill is only `SKILL.md` prose. |
| Network access | 0 (none) | There are no fetches, uploads, API calls, or remote endpoints in the skill. |
| Filesystem reach | 0 (none) | The skill reads only the text the user provides and does not mention writing, deleting, or accessing paths on disk. |
| Secrets & credentials | 0 (none) | It does not ask for tokens, passwords, `.env` files, keychains, or browser sessions. |
| Privilege & persistence | 0 (none) | No sudo, global installs, services, shell startup edits, or OS/git setting changes are described. |
| Instruction hijack surface | 1 (low) | It contains role and response-control instructions such as `You are an expert copyeditor` and `Do NOT include the corrected text in full`, but nothing that bypasses safeguards or fetches untrusted instructions. |
| Irreversible actions | 0 (none) | The skill only analyzes text and suggests fixes; it does not send messages, publish, pay, deploy, or delete anything. |
| Transparency | 0 (none) | All content is readable markdown; there are no binaries, obfuscated blobs, or unpinned downloads. |
Before installing
- Read `SKILL.md` to confirm it is just a text-review prompt and not paired with any hidden scripts or downloads.
- If you will use it on sensitive drafts, verify the host environment does not log or retain pasted text beyond your expectations.
- No extra setup is needed; there are no dependencies, installers, or permissions to check.
Rated 2026-10-16 by an automated review of 1 file from the skill's repository.
Source
- Repository
- phuryn/pm-skills (all skills from this repository)
- Path
- pm-toolkit/skills/grammar-check/SKILL.md
- Branch
- main
- Updated
- 2026-09-19
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