writing
Writing about systems I’ve built, open source, and technical questions I’ve tried to answer.
12 Sep 2026
A Checkpoint in the Middle of an INSERT
How a checkpoint invalidated an unfinished INSERT’s cursor in Turso.
TursoSQLiteRust
12 Aug 2026
How a Python type checker decides a variable is unused
ty tracks reads across Python scopes to decide which local bindings your editor should dim.
PythonLSPty
7 Jul 2026
What AWS Lambda was hiding
A class of bugs Lambda's runtime had been quietly absorbing. The migration to long-running services exposed them.
distributed systemsserverless