add frontend skills

skills/frontend-design/reference/ux-writing.md

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+# UX Writing
+
+## The Button Label Problem
+
+**Never use "OK", "Submit", or "Yes/No".** These are lazy and ambiguous. Use specific verb + object patterns:
+
+| Bad | Good | Why |
+|-----|------|-----|
+| OK | Save changes | Says what will happen |
+| Submit | Create account | Outcome-focused |
+| Yes | Delete message | Confirms the action |
+| Cancel | Keep editing | Clarifies what "cancel" means |
+| Click here | Download PDF | Describes the destination |
+
+**For destructive actions**, name the destruction:
+- "Delete" not "Remove" (delete is permanent, remove implies recoverable)
+- "Delete 5 items" not "Delete selected" (show the count)
+
+## Error Messages: The Formula
+
+Every error message should answer: (1) What happened? (2) Why? (3) How to fix it? Example: "Email address isn't valid. Please include an @ symbol." not "Invalid input".
+
+### Error Message Templates
+
+| Situation | Template |
+|-----------|----------|
+| **Format error** | "[Field] needs to be [format]. Example: [example]" |
+| **Missing required** | "Please enter [what's missing]" |
+| **Permission denied** | "You don't have access to [thing]. [What to do instead]" |
+| **Network error** | "We couldn't reach [thing]. Check your connection and [action]." |
+| **Server error** | "Something went wrong on our end. We're looking into it. [Alternative action]" |
+
+### Don't Blame the User
+
+Reframe errors: "Please enter a date in MM/DD/YYYY format" not "You entered an invalid date".
+
+## Empty States Are Opportunities
+
+Empty states are onboarding moments: (1) Acknowledge briefly, (2) Explain the value of filling it, (3) Provide a clear action. "No projects yet. Create your first one to get started." not just "No items".
+
+## Voice vs Tone
+
+**Voice** is your brand's personality—consistent everywhere.
+**Tone** adapts to the moment.
+
+| Moment | Tone Shift |
+|--------|------------|
+| Success | Celebratory, brief: "Done! Your changes are live." |
+| Error | Empathetic, helpful: "That didn't work. Here's what to try..." |
+| Loading | Reassuring: "Saving your work..." |
+| Destructive confirm | Serious, clear: "Delete this project? This can't be undone." |
+
+**Never use humor for errors.** Users are already frustrated. Be helpful, not cute.
+
+## Writing for Accessibility
+
+**Link text** must have standalone meaning—"View pricing plans" not "Click here". **Alt text** describes information, not the image—"Revenue increased 40% in Q4" not "Chart". Use `alt=""` for decorative images. **Icon buttons** need `aria-label` for screen reader context.
+
+## Writing for Translation
+
+### Plan for Expansion
+
+German text is ~30% longer than English. Allocate space:
+
+| Language | Expansion |
+|----------|-----------|
+| German | +30% |
+| French | +20% |
+| Finnish | +30-40% |
+| Chinese | -30% (fewer chars, but same width) |
+
+### Translation-Friendly Patterns
+
+Keep numbers separate ("New messages: 3" not "You have 3 new messages"). Use full sentences as single strings (word order varies by language). Avoid abbreviations ("5 minutes ago" not "5 mins ago"). Give translators context about where strings appear.
+
+## Consistency: The Terminology Problem
+
+Pick one term and stick with it:
+
+| Inconsistent | Consistent |
+|--------------|------------|
+| Delete / Remove / Trash | Delete |
+| Settings / Preferences / Options | Settings |
+| Sign in / Log in / Enter | Sign in |
+| Create / Add / New | Create |
+
+Build a terminology glossary and enforce it. Variety creates confusion.
+
+## Avoid Redundant Copy
+
+If the heading explains it, the intro is redundant. If the button is clear, don't explain it again. Say it once, say it well.
+
+## Loading States
+
+Be specific: "Saving your draft..." not "Loading...". For long waits, set expectations ("This usually takes 30 seconds") or show progress.
+
+## Confirmation Dialogs: Use Sparingly
+
+Most confirmation dialogs are design failures—consider undo instead. When you must confirm: name the action, explain consequences, use specific button labels ("Delete project" / "Keep project", not "Yes" / "No").
+
+## Form Instructions
+
+Show format with placeholders, not instructions. For non-obvious fields, explain why you're asking.
+
+---
+
+**Avoid**: Jargon without explanation. Blaming users ("You made an error" → "This field is required"). Vague errors ("Something went wrong"). Varying terminology for variety. Humor for errors.