Show HN: Gist – Zero-cost app specs for AI coding assistants

Generates the parts of a spec you wouldn't think to prompt for -- UX states beyond the happy path (error, offline, stale, empty), content security policy per data source variant, mock data shapes, implementation checkpoints so you approve the design before real data gets wired up.

You describe an app idea, answer questions about data sources and scale, pick your hosting. Output is a markdown spec with architecture guidance, trust boundaries, and a pre-ship checklist. Three complexity tiers based on your answers: minimal (plain HTML/CSS/JS, no build tools), standard (static site + optional edge proxy), full (SSG + edge proxy + KV cache + cron). Defaults to Cloudflare free tier but the stack choices are yours.

Spec generation is entirely client-side -- conditionals and templates, no LLM. Built with Astro 5 on Cloudflare Pages + Workers. Follows the same zero-stack pattern it generates specs for.