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textbook-index

95 / 100 · Low risk

Fine to try.

By jiayaoqijia/cryptoskill (GitHub) · other · 81 stars · scanned at commit 0dc9f60

Build and query a table-of-contents index of math and crypto textbooks to answer "which book and chapter proves X?". Use when a proof needs a standard lemma, when idea mining needs an external mathematical structure, or when adding books to references/textbooks.

Works with any agent that supports SKILL.md skills.

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What this skill can do

Install

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

if [ -e ~/.agents/skills/'textbook-index' ] || [ -L ~/.agents/skills/'textbook-index' ]; then echo 'A skill folder named textbook-index already exists — not replacing it' >&2; false; else d=$(mktemp -d) && git clone --quiet --filter=blob:none --no-checkout 'https://github.com/jiayaoqijia/cryptoskill' "$d" && git -C "$d" checkout --quiet '0dc9f60ab1f3fcae24da49c4cef09c46c589f903' -- 'skills/dev-tools/acprk-textbook-index' && mkdir -p ~/.agents/skills && cp -R "$d"/'skills/dev-tools/acprk-textbook-index' ~/.agents/skills/'textbook-index' && 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/'textbook-index' ~/.claude/skills/'textbook-index' (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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