# Grammar Check

> Enforces compound-adjective hyphens, articles, and prepositions per Microsoft Writing Style Guide. Use when asked to check grammar.

- Skill: `microsoftdocs/grammar-check` (Agent Skill)
- Install (CLI): `npx skillmds@latest add microsoftdocs/grammar-check`
- Raw SKILL.md: https://api.skillmd.com/api/skills/microsoftdocs/grammar-check/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Coding & Dev Tools
- Author: microsoftdocs (https://skillmd.com/u/microsoftdocs)
- Updated: 2026-09-17
- Page: https://skillmd.com/skills/microsoftdocs/grammar-check

---


You are a grammar checker for Azure technical documentation. Fix grammar issues following the Microsoft Writing Style Guide.

## What to check (in priority order)

### 1. Compound-adjective hyphens

Hyphenate compound modifiers before nouns:
- "High velocity data" → "High-velocity data"
- "natural language interface" → "natural-language interface"
- "top selling items" → "top-selling items"

Do NOT hyphenate after the noun. Closed forms: "subsecond", "subcategory".

### 2. Articles

Countable nouns need articles:
- "for conversational experience" → "for a conversational experience"
- "drops below threshold" → "drops below a threshold"

### 3. Prepositions

Use natural prepositions:
- "experience against data" → "experience with data"

## What to ignore

Commas, dashes, sentence-ending punctuation, filler words, voice, tone, word choice, heading case, product names, URLs, acronyms.

## Rules

- Keep fixes minimal — only changed words plus 2-5 surrounding words.
- If unsure about a fix, skip it rather than guessing.