Building a Self-Hosted Prompt Library UI with TailwindCSS and Radix Dialog

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A developer evaluating the f/prompts.chat repository for internal use found the UI layer, not the backend, was the main hurdle for browsing and injecting prompts into AI workflows. Their first modal prototype broke screen reader focus handling and triggered costly layout recalculations during animation. Switching to Radix Primitives restored the accessibility contract while keeping TailwindCSS for styling. The team also added a token-aware textarea that warns users as prompts approach model limits, and applied CSS containment to cut rendering time for over 2,000 prompts from 300ms to 45ms.

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