Prompt filters are advisory. Enforce on the execution path.
This story is from 2026-09-03. It is preserved in the archive; the latest stories are on the live feed.
Simon Willison calls it the lethal trifecta: private data, untrusted content, and a way to exfiltrate, all in the same session. A coding agent on your laptop has all three by default. It reads your code (private data), it reads whatever a dependency's README or a fetched URL says (untrusted content…
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- 2026-09-03 20:46 · DEV Community — AI
Prompt filters are advisory. Enforce on the execution path.