mitsuhiko complains Opus 5.5 keeps editing files via bash, mulls a blocking extension
mitsuhiko · x · 2026-09-25
Armin Ronacher (mitsuhiko) shared a friend Mario's proposal to write an extension that injects "mofo, don't use bash to edit files" — noting it matches his current experience with Opus 5.5.
The quip highlights a concrete behavioral flaw of the new Claude Opus in coding-agent workflows: it tends to bypass dedicated file-editing tools in favor of raw bash commands, and users are already working around it with prompt-injecting extensions.
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