kalomaze slams Anthropic's opaque agent harness: sub-model misreads /goal and blocks the main model

kalomaze · x · 2026-11-14

Local-LLM dev kalomaze calls out Claude's agent harness: a smaller, shorter-context sub-model misinterprets an abbreviation in /goal as something entirely different, then prevents the main model from finishing — and it's on by default. He says he hates "invisible nontransparent harness bullshit," implying Anthropic is a big fan of it. A pointed critique of observability in commercial coding agents: sub-agent interactions users can't see or control.

Related event: Developer slams Claude's invisible sub-calls and opaque eval harness(4 posts)→

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