A curated list of tools, references, and learning material for Claude Code users.
- Claude Code Documentation : Anthropic's official docs
- Claude Code GitHub : Source and issue tracker
- Anthropic Skills Repository : Official pre-built skills (PDF, DOCX, XLSX, PPTX)
- Claude Code Changelog : Release notes for every version
- Build This Now : AI-powered SaaS build system with 18 specialist agents and 55+ skills. Uses Claude Code's agent architecture to go from idea to production in 48 hours. One-time $197 purchase.
- Build This Now Blog : In-depth Claude Code guides, best practices, and agent engineering patterns
- lean-ctx : Compresses CLI output and caches file reads between Claude and the model. A 30K-token file read drops to 195 tokens on the second pass.
- caveman : Claude Code skill that rewrites replies in compressed "caveman speak." Same meaning, 70% fewer tokens.
- symdex : Pre-indexes your repo into SQLite with symbols, call graphs, and embeddings. Symbol lookups drop from 7,500 tokens to 200.
- Agent Skills for Context Engineering : Library of 13 skills for context compression, filesystem offloading, and multi-agent orchestration.
- ccusage :
npm install -g @ryoppippi/ccusage. Shows daily and monthly token spend with per-model breakdowns. Essential for cost control.
- r/ClaudeAI : Active subreddit for Claude users
- Claude Code Discord : Community chat
- Build in Public on X : Follow #ClaudeCode for real-time tips
If you're just getting started, work through the guides in this order:
- Getting Started
- CLAUDE.md Mastery
- Skills and Slash Commands
- Context Management
- Memory Systems
- Planning Modes
- Git Integration and Worktrees
- Performance and Cost
For deep dives on agent engineering and production Claude Code patterns, check out the Build This Now blog.