[hacker161]

Considering it happens across both opencode and other apps like Claude and Codex as well as across models it seems like something inherent to the models themselves and not necessarily a bug in the apps wrapping them. But maybe there’s more opencode et. al could be doing to prevent it.

[eloisius]

The harnesses are the part of the stack responsible for tools, so it would be a bug there, not the model. The model itself isn’t doing anything but generating tokens. The harness gives it a blob of text telling it which tools exist, and the model may choose to tell the harness to call one.