The Pre-Deploy Checklist That Prevents Embarrassing Website Launches
Every website deployment goes through a gated checklist: clean build, visual screenshots at three screen sizes, performance verification, security headers, and post-deploy verification within 30 minutes.
A website deployment is not pressing a button. It is a gated process where each gate must pass before the next step happens. If any blocking item fails, the deploy stops until the issue is fixed and re-verified.
Gate one: clean build. Zero TypeScript errors, zero linting warnings, total JavaScript bundle under 100KB. Gate two: every route returns a 200 status code. No broken links, no 404 pages, no missing redirects.
Gate three: visual verification. We capture automated screenshots at three viewport widths (desktop 1440px, tablet 768px, mobile 375px) and visually inspect each one. Code reviews cannot catch visual bugs. Only screenshots can. This step is non-negotiable.
Gate four: performance. All images optimized to WebP format. Total public directory under 1MB. No render-blocking font requests. Analytics loaded on lazy strategy. Gate five: security headers configured (content type, frame options, referrer policy, content security policy). Gate six: SEO signals verified (metadata, structured data, sitemap, robots.txt).
Post-deploy: the live URL is checked within 30 minutes. Not the staging URL. The actual production URL that clients will visit. This final verification catches deployment-specific issues like CDN caching, DNS propagation, or environment variable differences.
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