Fettle documentation

Fettle is a native review desk for local code changes. It keeps the diff, the prompt that caused it, screenshots, and your verdict in one place.

Choose a path

Get Fettle running

Build the app, open a repository, and choose a change to review.

Review a change

Read the diff, leave comments, inspect screenshots, and return a verdict.

Fettle works alone for repositories and pull requests. Pair it with Saggar to group changes by agent turn and include the prompt that produced them.