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power-analysis

100 / 100 · Low risk

Fine to try.

By gaasher/Agent-Loop-Skills (GitHub) · data · 181 stars · scanned at commit f1169e6

Use when the user is planning a two-arm comparison (an A/B test, a simple RCT, a behavioral study, or a two-model/two-config evaluation) and needs to size it and preregister it before collecting data — finding the per-group sample size that hits target statistical power for the smallest effect worth detecting, auditing the design against a validity checklist, and locking it in a preregistration. Only for a single two-arm comparison with one primary outcome. Not for factorial, repeated-measures,…

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/'power-analysis' ] || [ -L ~/.agents/skills/'power-analysis' ]; then echo 'A skill folder named power-analysis already exists — not replacing it' >&2; false; else d=$(mktemp -d) && git clone --quiet --filter=blob:none --no-checkout 'https://github.com/gaasher/Agent-Loop-Skills' "$d" && git -C "$d" checkout --quiet 'f1169e6db0b0f8a83ced3a18562b7c57e14a748a' -- 'loops/power-analysis' && mkdir -p ~/.agents/skills && cp -R "$d"/'loops/power-analysis' ~/.agents/skills/'power-analysis' && 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/'power-analysis' ~/.claude/skills/'power-analysis' (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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