In a recent article, I wrote about using skills to encode judgement and understanding into agents.
I put together a set of skills that each focus on a different part of a product and help make it better.
/better-ui
/better-typography
/better-colors
More skills are coming soon.
npx skills add jakubkrehel/skills
can confirm - 5.6 sol is great at fixing React useEffect slop too!
prompt: "Run npx react-doctor@latest, triage each issue and create a central draft PR, then stack verified fixes onto that PR"
submitting an iOS app soon?
this might save you from losing two weeks to one stupid App Store rejection
I went through the most common reasons Apple rejects apps and put them all into one article
it’s a long article, so don’t just scroll past and forget it
save it now and read it when you have time
Introducing /improve-react
Find bad React code in your codebase, triage, and fix
I've found it really effective with GPT 5.6 Sol / Fable 5 (if you have $)
Liquid Glass background
Prompt (Fable 5):
Create a Liquid Glass background (code file) in Apple's Liquid Glass style.
Key effect: when placed over content, the glass must refract and warp the background behind it like looking through a water droplet, the background bends, magnifies, and shifts color at the edges (strongest distortion near the borders, subtle in the center). Not just blur.
Use an SVG displacement filter (feTurbulence + feDisplacementMap) on the backdrop, plus edge chromatic dispersion (RGB split) for the rainbow fringe.
Adjustable settings: Light, Refraction (distortion strength), Depth, Dispersion (chromatic edge), Frost (blur amount), Splay (edge falloff).
Start using this new Skill for iOS app development.
Antoine is a Swift expert and is building skills that help your agents work more effectively.
Follow him for more great skills + tips. @twannl
New skill: /apple-design
Apple’s WWDC videos are a goldmine of knowledge. I’ve combed through my favorite ones and came up with 17 design and motion principles.
Use them to review existing work or when working on something new to get it right.
https://t.co/jCwhthpi20
More of the iOS app loop, now inside Codex.
The Build iOS Apps plugin lets Codex view and test your iOS app in the in-app browser, open SwiftUI previews, and hot reload edits without leaving Codex.
How to design the perfect IOS mobile app:
- Flawless shadows
- Consistent spacing
- 430px width, 932px height
- Simplifying everything down
- Great typography (SF pro rounded)
Take notes!
Loop engineering - the reading list
In 2026 agents stopped being about smarter prompts and started being about longer runs.
Everyone needs to stop writing stupid prompts and start learning Loop engineering.
The real question isn't "what do i type". It's "how does my agent keep going for 40 minutes without falling over".
1. Can it recover from a failed step?
2. Can it control spend?
3. Does it know when to stop?
All of it comes back to loop design:
[ READING LIST ]
1. Addy Osmani - Loop engineering:
https://t.co/kzIbYW8wLG
2. Firecrawl - Loop engineering:
https://t.co/8UhKcZvbw9
3. Oracle - What is the AI agent loop:
https://t.co/Jg5ic7dxJc
4. OpenAI - Harness engineering:
https://t.co/7i34jS1Qk9
5. Martin Fowler - Harness engineering for coding agent users: https://t.co/1QvsIHGbXa
6. From React to loop engineering - Agentic loops:
https://t.co/WERkgRXWsy
7. Mem0 - Loop engineering for ai agents, memory-first:
https://t.co/mJxzguwX7z
[ OPEN SOURCE WORTH READING ]
1. Codex CLI: https://t.co/TCbo5tNb3b
2. Openhands: https://t.co/KgPJOHgLK4
3. Pydanticai: https://t.co/6Dd1Hu9Etj
4. OpenAI Agents SDK: https://t.co/JobwcV75dH
[ WHAT TO STUDY ]
- How the loop runs?
- How the loop stops?
- How the loop verifies?
- How the loop recovers?
- How the loop is debugged?
[ THE POINT ]
- Prompt decides how the agent starts.
- Context decides what the agent sees.
- Loop decides how far the agent gets.
Scheme:
Think -> Act -> Observe -> Verify -> Evolve -> Repeat
[ START HERE ]
Before you touch anything above - read my Article first -It's the entry point.
this guy just dropped a library of 25 INSANE loops for Fable 5
> automations for marketing, sales, research, coding…
> every one documented, flow mapped, prompt ready
> each paired with the exact tool to run it and the goal it hits
plus it's free... all you do is send these screenshots to Claude:
I don't prompt Claude Code anymore.
I have loops running that prompt Fable, and my job is just to write loops.
This is the Boris Cherny method, and I have to say, it's extremely powerful.
Everything you need to get started with loop engineering (as a complete beginner):