shadcn-ui

name	shadcn-ui
description	ShadCN UI component installation workflow for Wasp projects. Use when installing ShadCN components, fixing import errors, or working with UI components. Includes CRITICAL version lock (v2.3.0 ONLY) and mandatory import path fix.
triggers	["shadcn","component","install component","button","dialog","card","UI component","shadcn error"]
version	1
last_updated	"2025-10-18T00:00:00.000Z"
allowed_tools	["Bash","Edit","Read"]

ShadCN UI Component Installation Skill

Quick Reference

When to use this skill:

• Installing ShadCN UI components
• Fixing ShadCN import errors
• Setting up new UI components

CRITICAL Version Lock

ONLY USE: ShadCN v2.3.0

Why: Newer versions require Tailwind v4, which is incompatible with Wasp.

Complete Installation Workflow

Step 1: Install Component

npx shadcn@2.3.0 add button
# Replace 'button' with desired component name

CRITICAL: Always use @2.3.0 version lock

Step 2: Fix Import Path (MANDATORY)

This fix is REQUIRED for EVERY component installation!

File location: app/src/client/components/ui/{component}.tsx

Before (WRONG):

import { cn } from "s/lib/utils";

After (CORRECT):

import { cn } from "../../lib/utils";

Why: ShadCN generates wrong import path. Must fix manually.

Step 3: Use Component

import { Button } from '@/components/ui/button'

<Button variant="default">Click me</Button>

Available Components

Common components to install:

• button
• card
• dialog
• dropdown-menu
• input
• label
• textarea
• select
• checkbox
• radio-group
• switch
• accordion
• tabs
• toast
• alert
• badge
• form
• table
• sheet

Component Location

All ShadCN components go in:

app/src/client/components/ui/
├── button.tsx
├── card.tsx
├── dialog.tsx
└── ...

Common Errors & Solutions

Error: Cannot find module 's/lib/utils'

Cause: Forgot to fix import path after installation

Fix: Change import in component file:

-import { cn } from "s/lib/utils"
+import { cn } from "../../lib/utils"

Error: Component styling broken

Cause: Wrong import path or missing Tailwind config

Fix:

1. Verify import path fix was applied
2. Check tailwind.config.js has ShadCN config

Error: ShadCN version mismatch

Cause: Used wrong version (not v2.3.0)

Fix: Uninstall and reinstall with correct version:

rm app/src/client/components/ui/{component}.tsx
npx shadcn@2.3.0 add {component}

Installation Checklist

After EVERY component installation:

• Used npx shadcn@2.3.0 add {component}
• Fixed import path from s/lib/utils to ../../lib/utils
• Verified component renders correctly
• No import errors in console

Critical Rules

✅ DO:

• Always use @2.3.0 version lock
• Fix import path after every installation
• Verify component works before proceeding

❌ NEVER:

• Use shadcn without version lock
• Skip import path fix
• Use newer ShadCN versions (breaks with Tailwind v4)

Examples

Installing Button Component

# 1. Install
npx shadcn@2.3.0 add button

# 2. Fix import in app/src/client/components/ui/button.tsx
# Change: import { cn } from "s/lib/utils"
# To: import { cn } from "../../lib/utils"

# 3. Use
import { Button } from '@/components/ui/button'
<Button>Click me</Button>

Installing Multiple Components

npx shadcn@2.3.0 add button card dialog

# Then fix import path in ALL THREE files:
# - app/src/client/components/ui/button.tsx
# - app/src/client/components/ui/card.tsx
# - app/src/client/components/ui/dialog.tsx

Troubleshooting

If components don't work after installation:

1. Check version: npm list shadcn-ui
2. Verify import path fix was applied
3. Check Tailwind config includes ShadCN
4. Restart wasp: ../scripts/safe-start.sh (multi-worktree safe)