Effect v4 Code Review Orchestrate a multi-agent review against Effect v4 ("effect-smol", the line) best practices. Effect v4 is a structural rewrite. Services, errors, , and all changed shape. This skill checks that v4 code follows v4 conventions — it does not hunt for leftover v3 APIs. If the codebase is on Effect v3, use the skill instead. Step 0: Determine Review Mode The skill has two modes: - PR mode — review only the files changed on the current branch / PR. - Repo mode — review the entire repository, fanning out across a large number of subagents. Pick the mode from the user's request:…