Move your Effect codebase from v3 to v4.
What it does
Migrates an Effect v3 codebase to v4 using upstream API mappings and source signatures.
When to use it
Use when migrating a codebase or upgrading Effect ecosystem packages across the v3/v4 boundary.
How to use it
Give it an Effect v3 project; it updates dependencies and call sites until the v4 type-check passes, then reports verification results.
What you provide
- An existing project
Uses
Good to know
- starts one helper agent per item, so the count depends on the work
- cannot be undone: .repos/effect
Latest review
What you need · 3
Applies to a codebase using Effect v3 or its ecosystem packages that needs migration to v4.
Uses Node.js to check that an existing upstream checkout contains a 4.x version of Effect.
Access · 2
This skill
.repos/effect
Write
Deletes stale Effect checkouts (irreversible)
https://github.com/Effect-TS/effect
Read
Reads upstream Effect migration guidance