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BookLib

Context engineering tool for AI coding assistants. Detects post-training knowledge gaps, resolves them via MCP.

Stack

JavaScript (Node.js >= 18, ES modules). No build step. No TypeScript.

Key Directories

bin/ — CLI (booklib.js) and MCP server (booklib-mcp.js)
lib/engine/ — core: indexer, searcher, gap-detector, context-map, registries
lib/wizard/ — booklib init interactive wizard
hooks/ — PreToolUse/PostToolUse hooks for Claude Code
skills/ — 23 bundled skills (SKILL.md files)
tests/ — 767 tests via node:test

Commands

npm install — install deps
npm test — run all tests (must pass before committing)
npm link — link for local CLI testing
node bin/booklib.js <cmd> — run CLI from source

Rules

Always add a test when fixing a bug
Never write to CLAUDE.md or other agent config files from code — MCP handles discovery
MCP tools: lookup, review, remember, verify, guard (5 exposed, old names kept as aliases)

BookLib: knowledge tools for this project. Read skills/booklib-mcp-guide/SKILL.md before first use.