ktesio.dev — writing Essays from Ktesio on running AI agents like software: design notes behind its open-source projects. https://ktesio.dev/writing/atom.xml2026-09-07T00:00:00Z Zola Ktesio Metering agents you don't control https://hekma.ktesio.dev/docs/design/metering-agents-you-dont-control/ 2026-09-07T00:00:00Z Why Hekma meters an agent's model traffic at a boundary the agent cannot bypass, how the loopback proxy, the Usage Ledger and budget enforcement fit together, and what the meter still cannot see.