Source: https://seerepo.com/r/Automattic/harper
Markdown source: https://seerepo.com/r/Automattic/harper.md
Description: Automattic/harper is a Rust repo with 180,779 lines written. harper is built with Tokio, SvelteKit, Svelte, and 6 more and uses PostHog.

# What's inside Automattic/harper

Automattic/harper is a Rust repo with 180,779 lines written. harper is built with Tokio, SvelteKit, Svelte, and 6 more and uses PostHog. AI signed 0.5% of the 4,193 commits of harper.

Its description on GitHub: “Offline, privacy-first grammar checker. Fast, open-source, Rust-powered”

Rust · Apache-2.0 · 17,449 stars · GitHub: https://github.com/Automattic/harper

Read on November 6, 2026, at commit d52aeac.

## More on this repo

- [What is harper built with?](https://seerepo.com/r/Automattic/harper/built): harper is built with Tokio, SvelteKit, Svelte, and 6 more and uses PostHog.
- [How much of harper did AI write?](https://seerepo.com/r/Automattic/harper/ai): AI signed 0.5% of the 4,193 commits of harper.

## In figures

- 180,779 lines written: The ones people and agents wrote: product, tests, schemas and tooling. Generated code doesn’t count.
- 944 files: The same as the lines: product, tests, schemas and tooling. What’s generated doesn’t count.
- 112 test files: The files that test the code.
- 38 technologies: Each service with the file and line that prove it.

SeeRepo read the facts in its code and kept none of it. AI only helps sort its packages and folders by their names, and never sees its code.

## Frequently asked questions

### What is Automattic/harper?

Automattic/harper is a Rust repo with 180,779 lines written. Its description on GitHub: “Offline, privacy-first grammar checker. Fast, open-source, Rust-powered”

The proof: [its page on GitHub](https://github.com/Automattic/harper)

### What is harper built with?

harper is built with Tokio, SvelteKit, Svelte, and 6 more and uses PostHog.

The proof: [each service with its file and line](https://seerepo.com/r/Automattic/harper/built)

### How much of harper did AI write?

AI signed 0.5% of the 4,193 commits of harper.

The proof: [the commits each tool signed](https://seerepo.com/r/Automattic/harper/ai)

### What license does harper have?

harper is released under the Apache-2.0 license.

The proof: [its page on GitHub](https://github.com/Automattic/harper)

### How many stars does harper have on GitHub?

harper had 17,449 stars on GitHub on November 6, 2026.

The proof: [its page on GitHub](https://github.com/Automattic/harper)

## Add this badge to your README

It links to this page and updates itself each time SeeRepo reads the repo.

```markdown
[![Automattic/harper on SeeRepo](https://seerepo.com/badge/Automattic/harper.svg)](https://seerepo.com/r/Automattic/harper?de=insignia)
```

## What is your repo built with?

Any public repo, with no account: https://seerepo.com/r/owner/repo/built, with the owner and name it has on GitHub.