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Anthropic just dropped a 100% free course on Loop Engineering with Fable 5. This is the clearest breakdown of Claude Code and agentic loops you'll find anywhere. People are paying for tutorials that teach less than this one hour does. Watch it today, then read the step by step guide on building loops below.

Don't waste 2 years learning to code. The man who built Claude Code tells you what to learn instead. 82 minutes. Free: 24:03 - Anthropic's real engineering rules 27:44 - $100k+/month on Claude 40:42 - What to learn instead of coding Writing code is the old job. Building loops is the new one. Watch it. Then build your own loop with the guide below.

✅ Claude Code ✅ Claude Cowork ✅ Claude Design ✅ Claude Finance ✅ Claude Science ✅ Claude Teacher ⬜ Claude HR ⬜ Claude Analytics ⬜ Claude Marketing ⬜ Claude Sales ⬜ Claude Legal ⬜ Claude R&D ⬜ Claude Procurement ⬜ Claude Accounting ⬜ Claude Engineering

I did it. I figured out the perfect AI coding loop It's called the Finn Loop and it's 100x'd my vibe code output while cutting the work I need to do down by 95% ANYONE can implement this. It's super easy. Here's how it works: 1. 3 new skills inside your coding agent. /spec, /build, /review 2. You start out with /spec "your idea". The skill then asks you enough questions to fully understand your idea in detail then create a detailed spec inside Linear (amazing project management tool. Very generous free tier) 3. In another Codex/Claude Code session: you have a /build loop running. Once a spec is created, the /build skill picks it up and builds it out for you. Then advances the status of the issue in Linear 4. In another session, you have /review loop running. It picks up every issue that is built out then reviews it. Checks for security issues, optimization issues, then tests the code in its own browser, lays out test steps, takes screenshots, creates a PR, and puts it in its own vercel test sandbox for you to test it 5. The review loop then takes all of that and pings you in a channel in your favorite messaging service. I use Slack for this. It shows you the PR, gives you all the testing steps, and executive summary of the changes, and a link to the Vercel sandbox where you can test it 6. You go to the message in Slack, review the change, then send a rocket ship emoji as a reaction. This signals to the loop that the PR should be merged. The only manual steps in this loop are you submitting an idea to your agent, and verifying the change at the end. Everything in between is automated in the loop. Your vibe coding workflow today is hand holding your agent step by step on everything you build. You spend all day doing this. Your vibe coding workflow when using the Finn Loop is you wake up, make a cup of coffee, give your agent a list of ideas, then come back at night and review all the changes. You're free to do whatever you want during the day. Let me know if you want my full spec, build, and review skills. Will release them soon. Will also film a tutorial video on this. There's also a ton more details I'll share shortly too, like the interface I built for monitoring all of this. You also can probably just send this tweet to your agent and it will recreate the Finn loop for you. Carve off some time and try this out today. I promise it will dramatically improve your workflow

One of the smartest things you can do with Fable 5 right now: Re-create your AI second brain to log all your business ideas, personal context, and important data. The first time I built an AI second brain was with Opus, but I recently re-created it with Fable 5, and it blew my mind. Here's exactly how to get started: Step 1. Set up your Obsidian vault Download Obsidian from Obsidian dot md if you haven't already. Then, go ahead and create a clean vault with your most important folders. For example: /ideas → business ideas, content angles, random thoughts /context → who you are, your business, your goals, your stack /data → important numbers, portfolios, metrics /log → daily entries, decisions, lessons learned This is your database. Everything Fable reads lives here. Step 2. Connect Fable 5 to your vault I like this Claude Code prompt: "/goal connect to my Obsidian vault at [path] and act as my second brain orchestrator. Read everything in /context before every session. Log anything new I tell you to /log with today's date." Fable now reads your vault before it answers anything - it knows your business, your goals, your history. Step 3. Build the self-update habit Every time you have an idea, a decision, or a lesson, tell Fable: "Log this to my second brain: [thought]" Step 4. Start querying it You can start sending prompts like: → "What are the most common themes across my last 30 ideas?" → "Based on my context, what should I be prioritising this week?" → "What decisions have I made about my content strategy so far?" Opus was good at this, but Fable is on another level. I feel the depth of reasoning it brings to your data is genuinely unlike anything I've used before. Some might argue it's a bit of overkill to use Fable for a simple second-brain setup, but if you have the means, it's 100% worth it. Build this once, and it'll compound forever.