I write about code, systems & the craft of building things

Essays on distributed systems, language internals, and the occasional sharp opinion about abstractions.

# graceful shutdown that actually works
async def serve(app, stop: asyncio.Event):
    async with asyncio.TaskGroup() as tg:
        tg.create_task(app.listen())
        await stop.wait()
        app.drain(timeout=5)
# in-flight requests finish, then we're out.

Things I've written down so I don't forget

From SWIM Paper to eBPF Kernel Hooks: Building a Service Mesh Sidecar

Distributed systems infrastructure is typically treated as a black box. Developers use Consul for service discovery, etcd for consensus, and Istio for traffic management

8 min read·Aug 02, 2026·Read →