Jev in production › Writing and content scoring

riff

riff prose linter uses Jev for semantic rule checks, returning calibrated probabilities per finding; an example run costs about $0.0004 (Scale Venture Partners).

Open on GitHub ↗

$0.0004measured, as published by the source
Use
Writing and content scoring
Industry
Productivity
Form
Open-source tool
Stage
Beta
Listed
2026-09-30
Found via
github
Repository
scale-venture-partners/riff
Stars
7
Forks
2
Last push
2026-10-09
Language
Python
License
MIT

The README opens with

A small, fast prose linter. It reads a document, flags the writing tells and clarity problems it finds, and reports them with ruff-style rule codes you can select, ignore, and configure. Static rules are pure Python and run in milliseconds; the semantic rules are one call each to TypeSafe's Jev model, which returns a calibrated probability per judgment instead of generated text.

riff is not on PyPI yet, so install it from source. It uses uv.

Run directly from GitHub, no clone, with uvx (the repo is private, so this uses your existing GitHub credentials via git):

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For the project's own README, linking back here:

Listed in Jev in production

Also used for writing and content scoring