Give any AI assistant the working habits of a top-tier engineer, as plain text files you can read, in about the time it takes to copy-paste.
You've noticed it. You ask an AI to do something and it says "Done! ✅" — but it never actually checked. It writes fifty lines where five would do. It fixes the thing you pointed at and quietly leaves three identical bugs next to it. It agrees with you a little too eagerly.
The expensive, top-tier models do this less. But you don't always want to pay top-tier prices for every little task.
fableify is a stack of "habit cards" for your AI.
Each card is a short, plain-text file that teaches one good habit — the kind a seasoned professional has and a hurried one doesn't. You hand a card to your AI, and it starts behaving like the careful, senior version of itself:
- 📖 Reads before it writes — understands the whole problem instead of pattern-matching the first line.
- ✅ Verifies before it says "done" — actually runs the check, instead of claiming it passed.
- 🚫 Refuses to fake a green checkmark — tells you when something failed, plainly.
- ✂️ Does less — the smallest solution that actually works, not the most impressive-looking one.
- 🎯 Says the useful thing first — the answer, then the detail. No throat-clearing.
The trick: these habits don't need the smartest model. Written down clearly, a cheaper model can follow them — so you get careful, senior-grade work at that model's price.
You want the quality of the best AI without the bill. Load a habit card and a mid-tier model works like a careful one.
You're tired of "Done! ✅" that wasn't. The whole point of these cards is an AI that checks its work and tells you the truth about it.
You want to see and tweak the rules. No black box. Every habit is a short file in plain English. Don't like a rule? Edit it. It's yours.
No install, no account, no lock-in. It's just text. Copy the card into whatever AI tool you already use.
Seventeen habits, grouped by what they're for. A few highlights:
| If you want your AI to… | Reach for |
|---|---|
| Stop claiming things work without checking | verification |
| Fix the real bug, not just the symptom | debugging, coding |
| Catch security holes and prove they're real | security-review |
| Actually push back instead of flattering you | sparring-partner |
| Think in real options with honest confidence | pure-thinking |
| Write clearly and cut the fluff | writing |
| Plan risky work before diving in | planning |
| Design something clean instead of over-built | design-system, design-ui |
| Give straight career advice, not a pep talk | career-advisor |
…plus habits for reviewing code, handing off work, making estimates, and orchestrating bigger jobs. The full list with a one-line description each is in docs.md.
- Pick a card — open the
skills/folder and find the habit you want (say,skills/verification/). - Hand it to your AI — paste the card's
SKILL.mdinto your AI's system prompt / custom-instructions box. That's it. The habit is now on.
Using Claude Code? Drop the skills/ folder into your project and it picks them up automatically. Full setup notes for every tool are in docs.md.
Yes — and we can show our work. Every habit card ships with three built-in tests: one that proves it kicks in when it should, one that proves it stays quiet when it shouldn't (so it doesn't turn every question into a lecture), and one tricky edge case.
The whole catalog was also stress-tested by an independent reviewer whose only job was to break the claim that it's ready — checking every card against the rules and running the behavioral tests. It passed with zero hard failures.
To fableify something is to give it the good habits of Claude Fable, Anthropic's top model — and hand them to any other model as a fable it can follow. The strong model's judgment, written down so a cheaper one can borrow it.
These are plain markdown files, not code. They work with any assistant that lets you set instructions — Claude, and most others. No dependencies, nothing to run, nothing to sign up for.
Careful beats clever. Now your AI can be both.