Simon Willison — 2026-04-09#
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Today’s most substantive update is the release of asgi-gzip 0.3, which serves as a great practical reminder of the hidden risks in automated maintenance workflows. A silently failing GitHub Action caused his library to miss a crucial upstream Starlette fix for Server-Sent Events (SSE) compression, which ended up breaking a new Datasette feature in production.
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[asgi-gzip 0.3] · Source
Simon released an update to asgi-gzip after a production deployment of a new Server-Sent Events (SSE) feature for Datasette ran into trouble. The root cause was datasette-gzip incorrectly compressing event/text-stream responses. The library relies on a scheduled GitHub Actions workflow to port updates from Starlette, but the action had stopped running and missed Starlette’s upstream fix for this exact issue. By running the workflow and integrating the fix, both datasette-gzip and asgi-gzip now handle SSE responses correctly.