sl-atlas is an interactive textbook for post-quantum lattice cryptography — and a working demonstration of the lab's research method. Every concept renders at three depths so the same material reaches a curious non-expert, a working programmer, and a formal researcher without any of them reading the others' version.

• Follow the path — or don't. The sidebar is a numbered learning path from why any of this matters to the lab's own draft format. Every concept stands alone too; wander with j / k, search with /, look things up in the glossary (g).
• Pick a depth. Press 1 Simple, 2 Developer, 3 Researcher, or c for side-by-side Compare — the same concept, authored once, rendered three ways.
• Predict, then verify. Four concepts carry live demonstrations — the LWE equation, a draggable lattice, an encoder with an exact failure probability, and an attack-cost explorer. Each asks for your prediction before it shows the answer, and each ends with a plain statement of what it does not demonstrate. Concepts close with Check your understanding questions.
• The sidebar shows the method, not just the content. Held by Teacher gate is where the lab's own editorial review parks drafts it refused to publish — the gate's one BLOCK on record (and its resolution) is preserved in the decision log. The gate has teeth; you can see them.
• Every claim has a provenance chain. Each concept carries an evidence grade and citation IDs that resolve to CITATIONS.md. CI fails the build if any reference rots — and fails it if the published site drifts from the authored content.

New here? The first-hour visitor path walks the whole lab in six steps. Or just start exploring — pick a concept from the sidebar.