Harper Grammar Checker Skill

Check grammar and style in documents offline with Harper.

Updated Jan 22, 2026
One-click install
npx skills add https://github.com/uset82/Thesis-Writer-Kit --skill harper-grammar-checker-skill
Or copy as Structured Prompt for Agent
Please help me install this Agent Skill.
Skill: Harper Grammar Checker Skill
Source: https://github.com/uset82/Thesis-Writer-Kit/tree/main/.agent/skills/harper
Command: npx skills add https://github.com/uset82/Thesis-Writer-Kit --skill harper-grammar-checker-skill

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes references (resource) components.

What problem does it solve?

This Skill addresses the need for fast, private, and efficient grammar and style checking within your writing workflow, ensuring error-free documents without compromising data privacy.

Core Features & Use Cases

  • Offline Grammar Checking: Utilizes the Harper tool to identify and correct grammatical errors, subject-verb agreement issues, article usage, sentence structure, repeated words, and punctuation mistakes.
  • Privacy-Focused: Operates entirely offline, meaning no document content is ever sent to external servers.
  • Use Case: After drafting a section of your thesis, you can run Harper to automatically catch and fix common writing errors, ensuring a polished and professional output before further editing or submission.

Quick Start

Run the harper-cli tool to lint the file named 'introduction.md'.

Frequently Asked Questions about Harper Grammar Checker Skill

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I check grammar and writing style offline without sending document text to external servers?

Offline grammar checking can be performed using the Harper tool to identify subject-verb agreement, article usage, and punctuation errors locally. The process operates entirely offline, ensuring no document content is ever sent to external servers, which maintains strict data privacy.

What is offline privacy-first proofreading and how does it handle sentence structure errors?

Offline privacy-first proofreading analyzes documents locally to catch grammatical mistakes and repeated words. It addresses sentence structure errors by running a local linting process that ensures document quality and adherence to grammatical standards without external data transmission.

How do I lint a markdown file to fix common writing errors automatically?

You can lint a markdown file to fix common writing errors by running the harper-cli tool directly on the document. This local linting process automatically catches and corrects grammatical issues, ensuring a polished and professional output before further editing.

Can I use this offline grammar checker for thesis editing and academic writing?

Yes, the offline grammar checker is suitable for thesis editing and academic writing. It addresses common writing errors including subject-verb agreement and punctuation, ensuring document quality and adherence to grammatical standards for academic submissions without external data transmission.

What are the limitations of offline style checkers compared to cloud-based alternatives?

Offline style checkers operate without external data transmission, meaning they rely entirely on local processing power. While this ensures privacy, limitations include dependency on local hardware resources and potential lack of cloud-based dynamic updates for grammar rules.

Does the Harper grammar checker require an internet connection to proofread documents?

No, the Harper grammar checker operates entirely offline and does not require an internet connection to proofread documents. It ensures document quality by addressing grammatical errors locally without any external data transmission.