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n-plus-one-killer

100 / 100 · Low risk

Fine to try.

By MadBomber/experiments (GitHub) · other · 11 stars · scanned at commit 8139ff6

Detect, diagnose, and eliminate N+1 queries in Ruby on Rails. Use when the user mentions slow Rails endpoints, slow queries, "N+1", Bullet, prosopite, includes/preload/eager_load, eager loading, query count is high, page is slow to render, or asks why a Rails controller is slow. Also use proactively when reviewing any controller action that iterates a collection and accesses associations, or any view that loops and calls `.author`, `.comments.count`, etc. Bundles a Bullet config script and an E…

Works with any agent that supports SKILL.md skills.

What this skill can do

We found nothing in the files we read that matches our rules. That does not prove the skill is safe: see the limits of static scanning.

Install

Paste this into your terminal. It downloads exactly the version we scanned, not whatever is newest.

if [ -e ~/.agents/skills/'n-plus-one-killer' ] || [ -L ~/.agents/skills/'n-plus-one-killer' ]; then echo 'A skill folder named n-plus-one-killer already exists — not replacing it' >&2; false; else d=$(mktemp -d) && git clone --quiet --filter=blob:none --no-checkout 'https://github.com/MadBomber/experiments' "$d" && git -C "$d" checkout --quiet '8139ff68e8895b544661aa2ba8b53268d68652bc' -- 'ai_misc/skills/rails-skills/02-n-plus-one-killer' && mkdir -p ~/.agents/skills && cp -R "$d"/'ai_misc/skills/rails-skills/02-n-plus-one-killer' ~/.agents/skills/'n-plus-one-killer' && rm -rf "$d"; fi

Codex reads ~/.agents/skills directly. For Claude Code, Cursor, Copilot, Gemini CLI, Antigravity or OpenCode, also link it. For Claude Code: ln -s ~/.agents/skills/'n-plus-one-killer' ~/.claude/skills/'n-plus-one-killer' (other agents: ~/.cursor/skills, ~/.copilot/skills, ~/.gemini/skills, ~/.gemini/config/skills, ~/.config/opencode/skills). Or install through the finder skill, which does both.

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