book-mirror

82 / 100 · Low risk

Fine to try.

By garrytan/gbrain (GitHub) · design · 32,412 stars · scanned at commit 001c8c3

Take any book (EPUB/PDF), produce a personalized chapter-by-chapter analysis. Each chapter is preserved in detail (The Chapter) and mirrored back to the reader's actual life (The Mirror) using brain context. The mirror observes and resonates — a friend pointing out parallels, NOT a consultant rearranging the reader's life, NOT a therapist assigning homework. The reader decides what to do about it. Layout is a top-aligned HTML table or stacked sections, never a bare markdown pipe table (pipe tab…

Works with any agent that supports SKILL.md skills.

What this skill can do

Runs commands on your computer

This is disclosed by the author in the skill's SKILL.md or README. It runs automatically when the plugin is installed.

Found in 11 places.

skills/book-mirror/SKILL.md, line 82ls path/to/book.epub
skills/book-mirror/SKILL.md, line 101SLUG="this-book" # kebab-case
skills/book-mirror/SKILL.md, line 134pdftotext -layout path/to/book.pdf "$WORK/full.txt"

Show 8 more

skills/book-mirror/SKILL.md, line 200gbrain query "QUERY" --limit 3
skills/book-mirror/SKILL.md, line 225CONTEXT="$WORK/context.md"
skills/book-mirror/SKILL.md, line 371gbrain eval cross-modal --slug <slug>-personalized \
skills/book-mirror/SKILL.md, line 400gbrain book-mirror \
.codex-plugin/mcp.json, line 4"command": "./.agents/gbrain-launcher",
.claude-plugin/plugin.json, line 24"command": "${CLAUDE_PLUGIN_ROOT}/.agents/gbrain-launcher",
.claude-plugin/plugin.json, line 40"command": "env GBRAIN_HOOK_LANE=plugin \"${CLAUDE_PLUGIN_ROOT}/.agents/gbrain-launcher\" hook user-prompt",
.codex-plugin/plugin.json, line 30"command": "env GBRAIN_HOOK_LANE=plugin \"${PLUGIN_ROOT}/.agents/gbrain-launcher\" hook user-prompt --harness codex",

Downloads and installs other software

The author does not mention this.

Found in 1 place.

skills/book-mirror/SKILL.md, line 124If `bs4` is missing: `pip3 install beautifulsoup4 lxml`.

Other copies in this repository

garrytan/gbrain has 2 more folders with a skill named book-mirror. This page shows the lowest-scoring copy.

plugin/skills/book-mirror 82/100 · Low risk
test/fixtures/openclaw-mixed-merge/skills/book-mirror 95/100 · Low risk

Install

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

if [ -e ~/.agents/skills/'book-mirror' ] || [ -L ~/.agents/skills/'book-mirror' ]; then echo 'A skill folder named book-mirror already exists — not replacing it' >&2; false; else d=$(mktemp -d) && git clone --quiet --filter=blob:none --no-checkout 'https://github.com/garrytan/gbrain' "$d" && git -C "$d" checkout --quiet '001c8c39e84d726e9bb6ecbae053458c970d5af3' -- 'skills/book-mirror' && mkdir -p ~/.agents/skills && cp -R "$d"/'skills/book-mirror' ~/.agents/skills/'book-mirror' && 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/'book-mirror' ~/.claude/skills/'book-mirror' (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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Score history

Date	Version	Score
2026-11-10	`001c8c3`	82
2026-11-08	`98dda48`	82
2026-11-07	`a03306c`	82