Agent skill · marketing growth · kostja94
404-page-generator
When the user wants to create, optimize, or audit 404 error pages. Also use when the user mentions "404 page," "404 error," "error page," "page not found," "broken link page," "404 design," "custom 404," "404 redirect," "404 page UX," or "404 recovery." For sitewide page planning, use website-structure.
Why this skill is useful
Provides specific guidelines and best practices for designing effective 404 error pages that enhance user experience and conversion rates.
What it needs
About 2k tokens when loaded. Last updated 2026-06-09. 860 stars on the source repository.
What this skill does
Pages: 404 Error Page Guides 404 error page design for UX, conversion recovery, and brand consistency. When invoking: On first use, if helpful, open with 1-2 sentences on what this skill covers and why it matters, then provide the main output. On subsequent use or when the user asks to skip, go directly to the main output. Initial Assessment Check for project context first: If .claude/project-context.md or .cursor/project-context.md exists, read it for brand voice, key pages, and Section 12 (Visual Identity). Identify: 1. Site structure: Key pages to link (homepage, popular pages, search) 2. Brand tone: Friendly, professional, playful 3. Conversion goal: Recover lost visitors, drive to key pages Best Practices Clear Error Messaging User-friendly: Neutral message explaining the page wasn't found Optional 404 display: Can show "404" but avoid blaming the user Empathetic tone: Acknowledge the error gracefully; turn frustration into opportunity Navigation and Redirection Element Purpose --------- --------- Site navigation Header/footer so users know they're still on your site Search Help users find what they need Popular pages Links to homepage, features, pricing, blog Similar URLs Suggest corrections for common typos Avoid auto-redirect Unless confident of user intent Design and Branding Consistent design: Same header, footer, colors as rest of site (brand-visual-generator) Avoid confusion: Users should not think they've left your domain Mobile responsive: Test on all devices Conversion Opportunities 404 pages can drive conversions by: Showcasing popular products or features Featuring testimonials or social proof Offering special promotions or value Linking to mobile app or newsletter Technical Track 404s: Monitor broken links, fix or redirect Accessibility: Maintain WCAG standards HTTP status: Ensure proper 404 response code Output Format Copy options (headline, message, CTA) Link structure (what to include) Design checklist SEO: Typically noindex; ensure canonical if …
How to use it
Reference it in AdaL, Claude Code, Cursor or any coding agent — nothing to install:
@skills kostja94/404