Typerighter

Spec sheet

Purpose

Typerighter checks documents against user-defined rules and is designed to work like a spelling or grammar checker.Read 9 Oct 2026 · github.com

Intended users

The documented roles are rule owners who maintain rules and rule users who check copy against them.Read 9 Oct 2026 · github.com

Deployment

The project assumes AWS cloud services, defaults to the eu-west-1 region, and uses the Guardian's riff-raff deployment platform.Read 9 Oct 2026 · github.com

License

The repository is published under the Apache-2.0 license.Read 9 Oct 2026 · github.com

Accuracy and control

The project vision prioritizes accurate matches, explains why text was matched, and leaves every suggested edit under the user's control.Read 9 Oct 2026 · github.com

Custom integration

The Checker can function as a standalone REST service, and requests require a valid pan-domain authentication cookie.Read 9 Oct 2026 · github.com

Deployment assumptions

The repository assumes AWS cloud services, defaults to the eu-west-1 region, and uses the Guardian's riff-raff deployment platform.Read 9 Oct 2026 · github.com

Designed for

The project vision describes a document-proofing service intended to be available across internal tools and other applications that publish text.Read 9 Oct 2026 · github.com

Document checking

The Checker service accepts document check requests and returns matches from the rule corpus.Read 9 Oct 2026 · github.com

Editor integration

The companion prosemirror-typerighter plugin lets a ProseMirror document be validated and provides an interface to review suggestions and apply changes.Read 9 Oct 2026 · github.com

Guardian use

The Guardian uses Typerighter to check content against its style guide.Read 9 Oct 2026 · github.com

Implementation

The Checker and Rule Manager are Scala services built with the Play framework.Read 9 Oct 2026 · github.com

Integration

The prosemirror-typerighter plugin integrates Typerighter with the ProseMirror rich text editor and lets users review suggestions and apply changes.Read 9 Oct 2026 · github.com

Match details

Matches include the applicable text range, an explanation, and relevant suggestions.Read 9 Oct 2026 · github.com

Notable limitation

The repository states that it contains Guardian-specific assumptions and invites contributions to make the project easier to use in other institutional contexts.Read 9 Oct 2026 · github.com

Origin story

The Guardian says Typerighter began as a tool to flag text issues and was later built into its Composer editing software.Read 9 Oct 2026 · theguardian.com

Project goal

The project vision describes a document proofing service intended to be available wherever authors write and easy to integrate into applications.Read 9 Oct 2026 · github.com

REST access

Typerighter can function as a standalone REST platform, and requests require a valid pan-domain authentication cookie.Read 9 Oct 2026 · github.com

Results

Matches include the applicable text range, an explanation, and any relevant suggestions.Read 9 Oct 2026 · github.com

Rule management

The Rule Manager maintains the rule corpus and publishes it as an artifact consumed by the Checker service.Read 9 Oct 2026 · github.com

Rule storage

The Rule Manager stores data in Postgres and publishes a JSON rules artifact to S3 for the Checker to consume.Read 9 Oct 2026 · github.com

Rule types

Its rules include user-defined regular expressions, user-defined LanguageTool XML patterns, and predefined LanguageTool core rules.Read 9 Oct 2026 · github.com

Technology

The Checker and Rule Manager are Scala services built with the Play framework, and the Rule Manager stores data in PostgreSQL.Read 9 Oct 2026 · github.com

Two services

Typerighter consists of a Rule Manager that manages and publishes rules and a Checker that checks copy against them.Read 9 Oct 2026 · github.com

Plans and prices

Every Typerighter plan and price →

Where Specifiction places it

• Writing Style Checkers#16 of 298.0