Lucas Carlson https://lucascarlson.net/blog/ Essays on durable systems, open source, and building software. en A lease with a timeout is not a lock https://lucascarlson.net/2026/09/09/a-lease-with-a-timeout-is-not-a-lock/ https://lucascarlson.net/2026/09/09/a-lease-with-a-timeout-is-not-a-lock/ Wed, 09 Sep 2026 16:00:00 GMT Four fixes for one duplicate email. Each one closed a real gap. None of them was a lock, because none of them ran inside the write. Durable Objects without Cloudflare, on the database you already run https://lucascarlson.net/2026/08/24/introducing-open-source-durable-objects/ https://lucascarlson.net/2026/08/24/introducing-open-source-durable-objects/ Mon, 24 Aug 2026 16:00:00 GMT The Durable Objects programming model as a plain library on the SQL database you already run. And as of this week, the whole runtime runs in a browser tab on SQLite WASM.