Shadcn Code Block Diagnostics & Actions

Line actions and diagnostics. Built by composing Badge, Button, Code Block. A free, open source shadcn code block example you can install with npx shadcn@latest add @reui/c-code-block-11 and edit as your own code.

Error and warning lines with an action button on the active line.

For AI Agents

Hand your agent this brief or the ReUI MCP, not a screenshot. Free to install.

Best for: A function with an error line and a warning line, tallied in header badges, where a Fix line button appears on hover over either

When to use

Assistant replies and agent output that stream code, or lines a reader picks to ask about
Code review of diffs, git patches and diagnostics, with accept, reject and fix actions
Docs snippets and terminal or test logs with line numbers, copy, wrap, folding and search

When not to use

A fix that rewrites the source in place and can be undone: use the Code Block Fix With AI example
A full assistant conversation screen with thread list, transcript and composer: use the AI Chat blocks
A discount or promo code shown for a shopper to copy at checkout: use the Coupon blocks
A release console with environment lanes, a deploy history grid and streaming logs: use the Dev Ops blocks

Agent notes

The Fix line Button inside CodeBlockLineActions has no click handler; attach your fix action to it
The error and warning Badge counts are fixed text; derive them from lineLevels
Line specs such as highlightedLines, diff and folded count source lines from 1, whatever startLine prints in the gutter
maxLines caps height only on the built-in surface; with CodeBlockContent inside your own ScrollArea, cap that viewport yourself
Hoist transformers to module scope; a new array on every render re-tokenizes the whole file

Markdownhttps://reui.io/components/code-block/c-code-block-11.md

MCPget_example("c-code-block-11")

Installnpx shadcn@latest add @reui/c-code-block-11

Full index for agents:llms.txtReUI MCP setup

Shadcn Components in Code Block Diagnostics & Actions

About Shadcn Code Block Diagnostics & Actions

What You Can Build With Shadcn Code Block Diagnostics & Actions

Composes Badge, Button, Code Block, so it drops into any project already using those components.
Install it with the shadcn CLI: npx shadcn@latest add @reui/c-code-block-11
Open source and free, with the full source on this page to copy or adapt.

More Shadcn Code Block Examples

Basic Basic code block
Pinned Copy Pinned copy button
Streaming Agent Streaming agent response
AI Chat AI chat with code fences
Diff Summary Diff with change summary
Transformer Diff Diff via shiki transformers
Highlights Highlighted lines and words
Focus Walkthrough Focus walkthrough
Terminal Output Terminal output
Long File Long file with expand
Line Selection Line selection
Search In File Search in file

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Data Grid
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Frequently Asked Questions

When should I use Shadcn Code Block Diagnostics & Actions?

Use it for a function with an error line and a warning line, tallied in header badges, where a Fix line button appears on hover over either.

Shadcn Code Block as a whole fits:

Assistant replies and agent output that stream code, or lines a reader picks to ask about
Code review of diffs, git patches and diagnostics, with accept, reject and fix actions
Docs snippets and terminal or test logs with line numbers, copy, wrap, folding and search

For a fix that rewrites the source in place and can be undone, use the Code Block Fix With AI example. For a full assistant conversation screen with thread list, transcript and composer, use the AI Chat blocks. For a discount or promo code shown for a shopper to copy at checkout, use the Coupon blocks. For a release console with environment lanes, a deploy history grid and streaming logs, use the Dev Ops blocks.

How do I install Shadcn Code Block Diagnostics & Actions?

Run npx shadcn@latest add @reui/c-code-block-11. The CLI copies the source into your project, so you own the code and can edit it freely.

Is Shadcn Code Block Diagnostics & Actions free to use?

Yes. Every ReUI component example is open source and free for personal and commercial projects.

Which components does Shadcn Code Block Diagnostics & Actions use?

It composes Badge, Button, Code Block. The shadcn CLI installs those alongside the example.

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