Harper is an offline, privacy-first grammar checker written in Rust by Automattic. It runs locally with sub-10ms response times, supports LSP for editor integration, compiles to WebAssembly for browser use, and provides grammar, spelling, and style checking without sending text to external servers.
Installs into .claude/skills of the current project.
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---
name: "Harper Offline Privacy-First Grammar Checker by Automattic"
slug: "harper-offline-grammar-checker-automattic"
description: "Harper is an offline, privacy-first grammar checker written in Rust by Automattic. It runs locally with sub-10ms response times, supports LSP for editor integration, compiles to WebAssembly for browser use, and provides grammar, spelling, and style checking without sending text to external servers."
github_stars: 10182
verification: "listed"
source: "https://github.com/Automattic/harper"
category: "Content Writing & SEO"
framework: "Multi-Framework"
tool_ecosystem:
github_repo: "Automattic/harper"
github_stars: 10182
---
# Harper Offline Privacy-First Grammar Checker by Automattic
Harper is an offline, privacy-first grammar checker written in Rust by Automattic. It runs locally with sub-10ms response times, supports LSP for editor integration, compiles to WebAssembly for browser use, and provides grammar, spelling, and style checking without sending text to external servers.
## Installation
No source-backed install or usage instructions could be extracted automatically. Review the upstream project before running this skill in a sensitive workflow.
- Source: https://github.com/Automattic/harper
## Source
- [Agent Skill Exchange](https://agentskillexchange.com/skills/harper-offline-grammar-checker-automattic/)
