How this magazine is made.

A scheduled job runs each morning at 06:00 UTC. The four steps:

1. Scrape. Adapters pull items from RSS feeds, the Hacker News API, the arXiv API, and a last-resort HTML scraper. Each adapter has a 10s timeout and tolerates partial failure.
2. Curate. Sonnet reads the deduplicated pool and picks the day's biggest stories, with a one-line angle for each. Structured output via tool use.
3. Write. Opus turns the brief into a feature article in Czech and English, plus dispatches and the wire — runner-up items the curator considered but didn't lead with.
4. Illustrate. A pluggable provider generates a single sci-fi cover. The prompt is constrained server-side; no people, no logos, no text-in-image.

• claude-opus-4-7 — feature writing.
• claude-sonnet-4-6 — curation and summarisation.
• claude-haiku-4-5-20251001 — utility passes.

System prompts and the style guide are passed with prompt caching; the variable items of the day live outside the cached region.

Every issue is written natively in Czech and English in a single pass — not machine-translated. Czech is the default and serves at the root; English mirrors under /en. A handful of early demo issues exist in English only.

Each issue carries a signal strength from 0 to 100, shown as a small segment bar. It's computed deterministically from the cited sources: half from how diverse the source pool is, half from their average editorial weight.