Tested Claude tips. Real numbers. No filler.
Every post is grounded in something I actually ran — A/B tests, token counts, blind grades. If a claim can't be measured, it doesn't go in.
Claude Code Agent Teams: How Multiple Claude Sessions Now Coordinate On One Task (Practical Guide)
Anthropic added Agent Teams to Claude Code — multiple Claude sessions that message each other directly, share a task list, and coordinate with file-locking. Experimental flag required. Here's how it works, when to use it, and what breaks.
Agent Teams vs Subagents in Claude Code: When to Use Which (Honest Decision Framework)
Claude Code now has both subagents (fan-out) and Agent Teams (multi-session coordination). They look similar and do different things. Here's a decision framework based on real usage — with the failure modes nobody's documenting.
Claude Mythos and Project Glasswing: Anthropic Just Released an AI That Found Zero-Days in Every Major OS
On April 7, 2026, Anthropic previewed Claude Mythos — a model that autonomously found and exploited a 17-year-old FreeBSD RCE and zero-days across every major OS and browser. It's not going GA. Here's what Project Glasswing is, who's in, and what it means for software security.
Claude Opus 4.7 vs 4.6: What Actually Changed (Benchmarks + Real Workload Tests)
Anthropic released Claude Opus 4.7 (claude-opus-4-7) with a 1M-token context window. I ran 60+ hours of real workload tests on both 4.7 and 4.6. Here is what actually changed, what stayed the same, and when upgrading is worth it.
AI for Strategy
Learn how to use AI for strategic planning, generate insights and align your team with a shared vision
What Is Claude Cowork? Anthropic's Desktop AI Agent for Non-Technical Workers (Explained)
Claude Cowork is Anthropic's desktop agent that runs multi-step tasks across Google Drive, Gmail, DocuSign, and Zoom. Launched Jan 2026 as research preview, now GA with enterprise features (April 2026). Here's what it does and who it's actually for.
6 Claude Code Plugins Worth Installing in 2026 (gstack, Superpowers, claude-mem, and the Anthropic Trio)
Claude Code's plugin ecosystem exploded in early 2026. Here's the 6 plugins I'd actually install today, what each one solves, and the order to install them.
Claude Design (2026): What It Is, How It Compares to Figma and Canva, and Who Should Actually Use It
Anthropic launched Claude Design on April 17, 2026 — a conversational design tool powered by Opus 4.7 that creates prototypes, decks, and mockups. Free with Claude Pro. Here's what it does, what it doesn't, and the Figma/Canva comparison that actually matters.
claude-mem: The Persistent Memory Plugin That Saves ~10x Tokens on Claude Code (2026 Setup Guide)
claude-mem hooks into Claude Code's session lifecycle to capture, compress, and re-inject context across sessions. 46K stars. Here's how it works, what it actually does, and when to install it.
gstack: Garry Tan's Claude Code Setup — What It Actually Does, Why It Got 66K Stars (And Haters)
Y Combinator's Garry Tan open-sourced his Claude Code setup as gstack. 23 opinionated tools that act as CEO, Designer, Eng Manager, QA, Release Manager. Full breakdown of what's inside and who it's for.
Superpowers for Claude Code: The 42K-Star Plugin That Forces TDD + YAGNI + DRY
obra/superpowers is a complete software-development methodology for Claude Code. Forces TDD, YAGNI, DRY. Here's what it does, how it differs from gstack, and when to install it.
Reduce AI Hallucinations
Learn how to minimize AI hallucinations in Claude using /skeptic and /trim prompt codes for more accurate responses.
AI Coding Assistant
Discover best prompts for AI coding assistant to automate tasks and improve coding efficiency
Claude Certified Architect (2026): Exam Domains, 4-Week Prep Plan, and the 3 Traps to Avoid
Anthropic's first official certification launched March 12, 2026. Here are the 5 exam domains with weightings, a 4-week prep plan, and the mistakes candidates are making in the first wave.
Best Claude Counter / Usage Tracker Extensions for Chrome (2026 Comparison)
4 Chrome extensions that track Claude usage, tokens, and the 5-hour window. Tested all four against claude.ai — here's which one to install based on what you actually need to see.
Graphify + Claude Code: The Knowledge Graph Tool That Cuts Token Usage Up to 49x (2026 Setup Guide)
Graphify is an open-source knowledge graph skill for Claude Code. Instead of Claude grepping every file, it reads your codebase's structure first. Here's how to install it and when it's worth the setup.
Best Claude Prompts for Startup Founders (Tested, Not Guessed)
10 Claude prompt codes founders actually use for decisions, cold outreach, fundraising, and pricing. Each tested against baseline. Each with a before/after.
/blindspots — The Claude Prompt That Finds What You Didn't Ask
/blindspots surfaces the 2-3 assumptions you didn't notice you were making. One of only 5 Claude prompt codes that actually shifts reasoning (not just output format).
Career-Ops: The Open-Source AI Job Search Agent Built on Claude Code (34K Stars)
Career-Ops turns Claude Code into a full job search command center — auto-evaluates offers, generates tailored CVs, scans job portals, and tracks your pipeline. 34K GitHub stars. Here's how to set it up.
Why ChatGPT Prompts Don't Work in Claude (And What To Use Instead)
The 'ultimate ChatGPT prompts' you paid for don't produce the same output in Claude. Here's why, which types transfer, and which Claude-specific codes replace them.
Claude Prompt Cheat Sheet (PDF + Web) — Free vs Paid Options Compared
Looking for a Claude prompt cheat sheet? Here are the genuinely useful free PDFs, which paid ones are worth it, and how to tell which codes have been tested vs just copied from a Reddit thread.
Claude Prompt Code Combos — The 10 Stacking Patterns That Actually Compound
Single prompt codes are fine. Stacks of 2-4 are where the output quality jumps. Here are 10 tested combo patterns for common founder and developer tasks.
Claude Haiku 4.5 Prompt Codes That Actually Work (Tested vs Sonnet 4.6)
Re-tested 120 prompt codes when Haiku 4.5 shipped. 20% of rankings shifted. Here's which codes still work, which got better, and which broke.
Claude PR Review
Optimize pull request reviews with effective Claude prompts
The CRISPE Framework for Claude Prompts (Better Than 'Act as an Expert')
CRISPE — Capacity, Role, Insight, Statement, Personality, Experiment — is the prompt structure that consistently outperforms generic 'act as an expert' prompts. Here's how to use it.
How to Test If a Claude Prompt Actually Works (The 30-Second Method)
Most 'secret Claude prompts' online are untested opinions. Here's the simple controlled-test method that tells you in 30 seconds whether a prefix is doing anything.
AI Client Proposals
Learn how to use AI for client proposals and create personalized content
47% of Popular Claude Prompts Are Placebo — Here's The Data
Ran 120 viral Claude prompt codes through a controlled testing harness. Nearly half produced output indistinguishable from baseline. Which ones don't work, and why.
How to Stop Claude From Hedging (The 3 Prompts That Actually Work)
Claude's hedging problem isn't going away on its own. Here are 3 tested prompt codes that force decisive answers — with real before/after examples.
Claude Skills 101
Discover what Claude skills are and learn how to install them for better interactions
claude prompt for email subject lines
## Crafting Compelling Email Subject Lines with Claude You're trying to write email subject lines that grab attention and drive opens, but your current app
Estimate with Claude
Optimize estimation with Claude using L99 and /deepthink prompts
Claude Prompt
Optimize GitHub issue reports with Claude prompt codes /trim and /simplify
Investor Update Tips
Streamline investor updates with Claude prompts, automate reports
Claude Prompt
Optimize podcast show notes with Claude prompt codes L99 and /trim
The 15 Best Claude Prompt Codes in 2026 (We Tested 120, These Won)
We tested 120 Claude prompt codes and ranked them by actual impact on output quality. These 15 codes consistently changed Claude's reasoning, not just its formatting. Ranked from good to game-changing.
Claude Code Skills vs Prompt Codes — What's the Difference and Which Do You Need?
Skills and prompt codes both make Claude better — but they work completely differently. Here's a clear breakdown of what each one does, when to use which, and how to combine them for the best results.
CLSkills vs SkillsMP — Why 2,300 Curated Skills Beat 66,000 Scraped Ones
SkillsMP has 66,000 skills. CLSkills has 2,300. We compared both side-by-side — quality, safety, and usability. Here's why more isn't always better when it comes to Claude Code skills.
The Free Claude Guide That Replaced My $200 Udemy Course (40 Pages, No Catch)
I bought a $200 Udemy course about Claude. Then I found a free 40-page guide that covered more, went deeper, and actually kept up with the latest features. Here's what's inside and why it's worth your time.
5 PromptBase Alternatives for Claude Users in 2026 (One Is Free)
PromptBase was built for GPT prompts. If you use Claude, you need something different. Here are 5 alternatives compared — features, pricing, quality, and which one actually has Claude-specific content.
7 AI Tools for Sales Teams in 2026 That Actually Work (Not Just CRM Plugins)
Most 'AI for sales' lists are just CRM plugins. Here are 7 tools that actually change how you sell — from cold email to competitive positioning to deal coaching. Tested by a solo founder who does his own sales.
Claude Code Secret Commands — 12 Hidden Slash Commands Inside the CLI (2026)
Most Claude Code users only know /clear and /model. We tested every command in the CLI and found 12 hidden ones that change how Claude Code actually works — with examples for each.
Claude Secret Code Combos — 9 Stacking Patterns That 3x Your Output (2026)
Single prompt prefixes are useful. Stacked combos are where the real leverage is. We tested 40+ combos of Claude secret codes and found the 9 that consistently outperform any single code.
8 Claude Secret Codes I Use Every Day as a Solo SaaS Founder (2026)
I run CLSkills solo. Claude is my engineering team, my marketing team, and my sales coach. These are the 8 secret prompt codes I genuinely use every day, and the exact moments I use each one.
The Cold Email Follow-Up That Gets Replies — 5 Templates That Don't Sound Desperate (2026)
Your prospect didn't reply to your cold email. Here are 5 follow-up templates that actually get responses — each one from a different sales philosophy, with the psychology behind why they work.
How to Handle Pricing Objections in Sales — The 7 Reframes That Actually Work (With AI Examples)
Stop saying 'we offer great value.' Here are 7 specific pricing objection reframes used by founders who built billion-dollar companies — with exact scripts you can copy.
Claude API vs ChatGPT API Pricing (2026) — Complete Cost Comparison
A detailed 2026 pricing comparison of Claude API vs ChatGPT API: per-token costs, context windows, rate limits, and which is cheaper for your use case.
Claude Code vs Cursor (2026) — Terminal AI vs AI-Native Editor
Claude Code vs Cursor in 2026: comparing terminal-based AI coding with an AI-native editor. Different philosophies, different strengths, and who should use which.
Claude Code vs GitHub Copilot (2026) — Terminal AI vs Inline AI, Which Is Better?
Claude Code and GitHub Copilot are fundamentally different tools. One lives in your terminal and understands your entire project. The other lives in your editor and autocompletes lines. Here's when to use each.
Claude Context Window Explained — How Much Can Claude Remember? (2026)
Understand Claude's context window, token limits for Opus 4.6, Sonnet 4.6, and Haiku 4.5, and practical tips for working within context limits.
Claude Opus 4.6 vs Sonnet 4.6 — When to Use Which (2026 Guide)
When should you use Claude Opus 4.6 over Sonnet 4.6? A practical 2026 guide with real examples showing when the extra cost and latency is worth it.
Claude Pro vs ChatGPT Plus — Which $20/Month Subscription Is Worth It in 2026?
Comparing Claude Pro and ChatGPT Plus in 2026: message limits, model access, features, and who should pick which $20/month AI subscription.
Claude Projects vs Conversations — When to Use Which (2026)
Learn the difference between Claude Projects and regular conversations, when to use each, and how Projects give you persistent context and better results.
Claude System Prompts Explained — How to Set Claude's Behavior for Every Conversation
Learn what system prompts are, how they control Claude's behavior, and how to write effective system prompts with practical examples and templates.
Claude Temperature Settings Guide — How to Control Randomness vs Precision
Learn what temperature means for Claude, when to use low vs high temperature, and how to tune it for coding, writing, brainstorming, and more.
Claude vs ChatGPT for Business Use (2026) — Which AI Should Your Team Use?
Comparing Claude and ChatGPT for business tasks: emails, strategy, analysis, presentations, customer support, and team workflows. Practical guide for managers and team leads.
Claude vs ChatGPT for Coding (2026) — Which One Actually Writes Better Code?
An honest comparison of Claude Opus 4.6 vs GPT-5.4 for code generation, debugging, refactoring, and code review. With real examples and recommendations for different use cases.
Claude vs ChatGPT for Writing (2026) — Which One Sounds More Human?
Comparing Claude Opus 4.6 vs GPT-5.4 for emails, blog posts, cold outreach, and professional writing. Which AI writes more naturally and follows instructions better?
Claude vs Gemini in 2026 — The Honest Comparison (Opus 4.6 vs Gemini 3.1 Pro)
Claude Opus 4.6 vs Google Gemini 3.1 Pro — comparing reasoning, coding, research, speed, and pricing. Which AI is better for your specific use case in 2026?
Claude vs Perplexity for Research (2026) — Thinking Partner vs Search Engine
Claude vs Perplexity for research in 2026: when to use Claude as a reasoning partner and when Perplexity's source-backed search is the better tool.
How to Use Claude for Code Review — Catch Bugs Your Team Misses
Use Claude Opus 4.6 for thorough code reviews with /debug, /antipattern, SENTINEL, and PERSONA protocols. Copy-paste prompts included.
How to Use Claude for Data Analysis — Upload a Spreadsheet, Get Insights
Practical guide to analyzing CSV and spreadsheet data with Claude. Prompts for summaries, trends, anomalies, and visualizations included.
How to Use Claude for Debugging — The /debug Protocol That Saves 2 Hours Every Time
The exact /debug template for Claude: EXPECTED, ACTUAL, ERROR, CODE, TRIED. Real debugging examples that save hours of frustrating troubleshooting.
How to Use Claude for Email Writing — Professional Emails in 30 Seconds
Step-by-step guide to writing professional emails with Claude. Cold outreach, follow-ups, client updates, difficult conversations — with copy-paste prompts for each.
How to Use Claude for Legal Research (With Caveats) — A Lawyer's Practical Guide
How lawyers can use Claude for legal research, contract review, and case analysis. Includes real prompts and critical limitations every attorney must know.
How to Use Claude for Lesson Planning — Differentiated Materials in 10 Minutes
Teachers can use Claude to create differentiated lesson plans, worksheets, and assessments for any grade level and subject in minutes. Prompts included.
How to Use Claude for Meeting Notes — From Rambling Notes to Action Items in 60 Seconds
Turn messy meeting notes into structured action items with owners and deadlines using Claude. Copy-paste prompt templates included.
How to Use Claude to Write a Resume That Gets Interviews
Use Claude's PERSONA mode as a hiring manager to craft resumes that pass ATS filters and impress recruiters. Section-by-section prompts included.
How to Use Claude for Sales Emails That Don't Sound Like AI
Write outbound sales emails that get replies using Claude's /ghost, /punch, and /voice protocols. Full email sequence templates with copy-paste prompts.
How to Use Claude for SEO Content — Write Articles That Actually Rank
Use Claude with DEEPDIVE, /ghost, and BEASTMODE to write SEO content that ranks on Google and reads like a human wrote it. Full workflow inside.
How to Write a CLAUDE.md File — Step-by-Step Guide With Examples
A practical step-by-step tutorial for writing a CLAUDE.md file that makes Claude Code understand your project. Includes a complete real-world example.
What Are Claude Skills? How to Make Claude an Expert in Any Domain
Learn what Claude Skills are, how they work with Claude Code, where to put skill files, and how to use them to make AI an expert in any domain or workflow.
What Are MCP Servers? How to Connect Claude to Your Real Tools (2026)
Learn what MCP (Model Context Protocol) servers are, how they connect Claude to databases, APIs, and tools, and how to set them up in 2026.
What Is Claude Artifacts? Interactive Outputs Explained
Learn what Claude Artifacts are, what types of content they produce, when to use them, and how they make Claude's outputs interactive and visual.
What Is Claude Code? A Complete Beginner's Guide (2026)
Learn what Claude Code is, how it works in your terminal, how it differs from claude.ai, and how to install it. A plain-English beginner's guide for 2026.
What Is a CLAUDE.md File? The Complete Guide to Project Instructions
Learn what a CLAUDE.md file is, why it matters for Claude Code, and how to write one that makes AI understand your project's conventions and architecture.
The 15 Best Claude Prompt Prefixes in 2026 (Tested and Ranked)
The 15 Claude prompt prefixes that actually make a measurable difference in output quality. Ranked by usefulness, with examples for each. Tested over 3 months on Opus and Sonnet.
Claude Cheat Codes — The Complete Guide to Every Working Prompt Prefix (2026)
Every Claude "cheat code" that actually works in 2026. 120 community-discovered prompt prefixes tested over 3 months, organized by category, with examples. The definitive reference.
Claude Mythos: The AI Model So Dangerous Anthropic Won't Release It (What We Know)
Claude Mythos broke out of its sandbox during testing. It finds real vulnerabilities in real software. Anthropic locked it down. Here's everything we know — capabilities, restrictions, and when you might get access.
I Found the One Claude Command That Makes AI Writing Undetectable
/ghost strips every AI tell from your writing — em-dashes, 'I hope this helps', balanced sentences, hedging. The output reads like a tired human typed it at 11pm. Before/after examples inside.
PERSONA Claude Prompt — The Full Guide (Why Specific Personas Beat Generic Ones)
PERSONA is one of the most powerful Claude prompt prefixes — but only if you use it right. Generic personas barely work. Specific ones with real biases produce wildly better answers. Here's how.
/skeptic Claude Prompt — How to Make Claude Challenge Your Question First
/skeptic is a Claude prompt prefix that catches the wrong-question problem before you waste time on the wrong answer. Claude challenges your premise instead of answering. Here's how it works and when to use it.
ULTRATHINK Claude Prompt — Maximum Reasoning Depth, Zero Hedging
ULTRATHINK is the most powerful reasoning prefix for Claude — deeper than L99, longer answers, zero hedging. Here's when to use it, when it's overkill, and how it stacks with other prefixes.
7 Hidden Claude Prompts That Actually Work (Tested in 2026)
Most 'secret Claude prompts' on the internet are made up. We tested 50+ and found 7 that genuinely change how Claude responds. Here they are with real before/after examples.
Complete List of Claude Code Slash Commands (2026 Edition)
Every Claude Code slash command in one place — built-in commands, hidden ones, and the secret prompt codes that work like commands. Updated for 2026 with examples for each.
Claude L99 vs OODA vs ARTIFACTS: Which Mode to Use When (Tested)
Three of Claude's most powerful prompt codes — L99, OODA, and ARTIFACTS — each change how Claude thinks. We tested all three on the same prompts. Here's when each one wins.
The Claude Command Senior Devs Use That Nobody Talks About (L99)
L99 turns Claude from a quick-answer machine into a senior engineer. Same model, dramatically different depth. Here's what it does, when to use it, and why most people don't know it exists.
OpenClaude is Here — And All 2,300+ CLSkills Work With It
OpenClaude just launched as an open-source coding-agent CLI that works with OpenAI, Gemini, DeepSeek, Ollama, and 200+ models. The good news: every skill file on Claude Skills Hub works with it out of the box.
I Tested 100 Claude 'Secret Codes' — Only 5 Actually Changed the Output
I ran 120 Claude prompt codes through a testing harness. 70% are pure formatting. ~5 actually shift the reasoning. Here's the full list with honest verdicts on every single one.
10 Best Claude Code Agents in 2026 (Free Download)
Complete guide to the 10 autonomous AI agents for Claude Code. PR review, test writing, security audit, bug fixing, and more. All free to download and use.
How to Add Claude Skills — Install Claude Code Skills in 2 Minutes (2026)
How to add Claude skills to Claude Code. Step-by-step guide to installing skills on macOS, Linux, and Windows. 3 methods — download, curl, or git clone. Under 2 minutes.
30 Best Claude Code Skills in 2025
Discover the top 30 Claude Code skills available in 2025. From smart commits to full-stack scaffolding, these skills will transform your development workflow.
Claude Skills vs MCP Servers: What's the Difference?
Understand the key differences between Claude Code skills and MCP (Model Context Protocol) servers. Learn when to use each approach and how they complement each other.
How to Create Your Own Custom Claude Code Skills
A comprehensive guide to writing, testing, and sharing custom Claude Code skills. Learn the markdown format, frontmatter structure, best practices, and how to make your skills effective.
How to Use Claude Code Skills: Complete Beginner's Guide
Learn how to install, configure, and use Claude Code skills to supercharge your development workflow. A step-by-step beginner's guide covering everything from finding skills to using them effectively.
10 Claude Code Skills That Will 10x Your Developer Productivity
Discover 10 practical Claude Code skills that dramatically speed up common development tasks. Real examples showing how each skill saves time and improves code quality.
Setting Up Claude Code from Scratch: A Developer's Guide
A complete walkthrough for installing and configuring Claude Code for the first time. Covers installation, API setup, CLAUDE.md configuration, adding skills, and pro tips for maximum productivity.