/Tech13h ago

CEO Introduces /Improve Tool To Audit Code With Claude Models

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Original postGuillermo Rauch#672
shadcn@shadcn

You have Claude Fable for only a few days. Here's how to make the most of it.

Introducing /improve: use your most capable model to audit your codebase and write plans for cheaper models to execute later.

Studies your code, figures out bugs, perf, tech debt, missing tests, what to build and writes plans any agent can run.

4:31 AM · Jun 10, 2026 · 263.2K Views
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Many users praised shadcn's new /Improve CLI for catching subtle codebase issues and thanked the author for the valuable feature.

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shadcn@shadcn

The idea: use your smartest model for intelligence and cheaper models for execution.

You can run it across your whole codebase or on your current working branch.

Every plan comes with audit, discovery, scope, execution, testing and stop conditions.

GitHub: https://github.com/shadcn/improve

13hViews 5.9KLikes 87Bookmarks 91
shadcn@shadcn

@kapish_dima right. any codebase. not ui related. not frontend. a general coding skills.

13hViews 1.6KLikes 25Bookmarks 2
Duncan@ephraimduncan

@shadcn will fable run "/improve security"?

13hViews 1.6KLikes 3Bookmarks 1
KapishDima@kapish_dima

@shadcn Did I understand correctly that this isn't specifically a shadcn/ui improvement, but something for the codebase in general?

13hViews 1.9KLikes 5Bookmarks 1
shadcn@shadcn

@ephraimduncan Yes.

13hViews 1.3KLikes 5

@shadcn this is so good.

think I'll keep it in the toolbelt in general, I usually plan with an intelligent model and then send off to Composer 2.5 for cheap grunt work 🫡

13hViews 133Likes 2Bookmarks 1
shadcn@shadcn

@ludylops Yes. Run `/improve --issues` and it will create one issue per plan.

(By default plans are written under ./plans.)

13hViews 1.5KLikes 2

@shadcn Amazing, will be using it today. Instead of saving the plan can I ask it to just open well structured issues on my repo?

13hViews 1.8KLikes 1
shadcn@shadcn

@ephraimduncan Here's sample output.

13hViews 85Likes 2
Moinul Moin@moinulmoin

@shadcn i am on it

13hViews 457Likes 4
Duncan@ephraimduncan

@shadcn good thank you, i’m going to try it

13hViews 126Likes 1

@shadcn https://gist.github.com/OmerFarukOruc/753f95b1ac278b683be83ed26b3bcc1f

I have thought doing same and prepared with the Claude's Fable prompting guide. Maybe that /improve skill can be finetuned with those instructions.

https://platform.claude.com/docs/en/build-with-claude/prompt-engineering/prompting-claude-fable-5

13hViews 224Likes 1
Jan Marshal@janmarshaldev

@shadcn on it 👀

13hViews 151Likes 1
Stefan@stfvsl

@shadcn This is exactly how I use Fable now, great job!

13hViews 649Likes 2
Christian@chrisgoingturbo

@shadcn where is your cape man? you saving out here 🔥👨🏾‍🍳

13hViews 472Likes 2
shrey@shreytwts

@shadcn thankyou design engineers be like

9hViews 383Likes 2
CodeHagen@CodeHagen

@shadcn Went into X to look for a best practice with Fable. This was the first comment 🔥

The ROI in time you give me is insane 😅

13hViews 344Likes 2
Uh Mungus@mungus_uh

@kostyniuk00 @shadcn bruv it’s a one liner…

9hViews 8Likes 1
flavio@flaviocopes

@shadcn

6hViews 263Likes 2
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