# Copylint

> Copylint is a deterministic quality gate for user-facing copy. It reports each finding with line, rule, and excerpt, suggests a fix where the catalog has one, and changes the text only when you accept a fix.

A draft scores 0 to 100 against a fixed catalog of AI writing tells and passes below 40. Critical findings add 20, major 10, minor 3. The same input gets the same score on every run, with no model in the score. Each finding can carry a suggested fix from the catalog, and the web app can ask a model to rewrite one flagged sentence; the rewrite is scanned again, and the text changes only when the writer accepts it. The scanner is open source as unmachined (MIT); Copylint hosts it with history, an API, and team voice profiles.

- It is not a humanizer. It never rewrites a whole draft; every fix is a visible suggestion for one finding that you accept or skip.
- It does not detect AI authorship. A low score says the text avoids a known catalog, not who wrote it.
- It will not help anyone pass GPTZero or another detector.

## Product
- [Home and live demo](https://copylint.splitlabs.io): Paste a draft and see its score and every finding.
- [Pricing](https://copylint.splitlabs.io/#pricing): Open source free, Solo $19 a month, Team $79 a month.
- [Straight answers](https://copylint.splitlabs.io/#faq): What Copylint does not do, the default threshold, false positives, and how pasted text is handled.

## Documentation
- [Rules reference](https://copylint.splitlabs.io/rules): Every rule with its severity and weight, and how a score is calculated.
- [Scan API](https://copylint.splitlabs.io/docs): POST /api/v1/scan, request and response, errors and limits, a CI recipe, and the voice profile flag.
- [Open-source scanner](https://github.com/0xNyk/unmachined): unmachined on GitHub, MIT license.

## Policies
- [Privacy](https://copylint.splitlabs.io/privacy): Privacy policy.
- [Terms](https://copylint.splitlabs.io/terms): Terms of service.

## Optional
- [Full reference](https://copylint.splitlabs.io/llms-full.txt): Pricing, answers, the complete rule catalog, and the API contract in one plain-text file.