https://21no.de/ 2026-05-09 weekly 1.0 https://21no.de/books/ 2026-05-09 weekly 0.9 https://21no.de/viewer.html?file=the-next-frontier.md&label=Book 2026-05-08 monthly 0.8 https://21no.de/viewer.html?file=agent-event-loop.md&label=Technical+Essay 2026-05-08 monthly 0.8 https://21no.de/viewer.html?file=the-verification-trap.md&label=Whitepaper 2026-05-09 monthly 0.8 https://kai.21no.de/ 2026-05-05 weekly 0.9 https://go-mcp.21no.de/ 2026-05-05 weekly 0.9 https://go-vector.21no.de/ 2026-05-05 weekly 0.9 https://fast-injection.21no.de/ 2026-05-05 weekly 0.8 https://static.21no.de/ 2026-05-05 weekly 0.7