# Simplicity review

> Use when a change looks over-engineered and the code may not need to exist.

Reviews changes for unnecessary code and structural complexity, judging whether new code, abstractions, dependencies, or configuration need to exist. Use for YAGNI, simplicity, minimalism, maintainability, over-engineering, deep code-quality, or explicitly harsh and thermo-nuclear reviews.

## Facts

- Type: Agent skill
- Discipline: Engineering
- Author: Lachlan Donald (https://github.com/lox)
- Upstream: https://github.com/lox/agent-skills/blob/main/simplicity-review/SKILL.md
- Source file: https://raw.githubusercontent.com/lox/agent-skills/main/simplicity-review/SKILL.md (4589 bytes, sha256:950db6b4dbc8192e7127506ff85e18276bd643a5557e3703d8beacd35bfc2750)
- Licence: none declared by the repo
- Upstream copy last changed: 2026-09-17
- Status: listed, not yet ruled on by the curator

## Use it

I want to use the Simplicity review skill by Lachlan Donald.
This is what it does, in the author's own words: Reviews changes for unnecessary code and structural complexity, judging whether new code, abstractions, dependencies, or configuration need to exist. Use for YAGNI, simplicity, minimalism, maintainability, over-engineering, deep code-quality, or explicitly harsh and thermo-nuclear reviews.
Download the whole folder at https://github.com/lox/agent-skills/tree/main/simplicity-review, SKILL.md and every file beside it, into your skills directory: ~/.claude/skills/simplicity-review/ for Claude Code, ~/.agents/skills/simplicity-review/ for Codex, ~/.cursor/skills/simplicity-review/ for Cursor. Get it from the author's repo, not from startupskills.dev.
Then tell me the path you installed it to and how to invoke it.

Nothing here is vendored: install from the author's repo. This file carries none of the author's file.

## Links

- Page: https://startupskills.dev/lox/simplicity-review
- Author: https://startupskills.dev/lox
- Index: https://startupskills.dev/llms.txt

## The file

Not reproduced here: the repo does not license republication. Read it on the author's GitHub:
https://github.com/lox/agent-skills/blob/main/simplicity-review/SKILL.md