/u/locbuilds on r/LocalLLM gives advice for an issue where the Qwen 3.8-27b model enters repetitive loops when making tool calls during debugging sessions. Community members suggest that this is often a bug within the agent harness rather than the model itself, recommending several technical mitigations to manage these failures effectively.
- Implement hard loop breakers in the application harness to detect and stop identical consecutive tool calls.
- Provide explicit "error" or "already tried" feedback in tool observations to signal failure back to the model.
- Lower temperature (0.1–0.3) for tool-heavy turns and apply repetition penalties via the sampler.
- Use specialized chat templates, such as Froggeric's Qwen fixed template, which may alleviate looping issues.
- Implement hard loop breakers in the application harness to detect and stop identical consecutive tool calls.
- Provide explicit "error" or "already tried" feedback in tool observations to signal failure back to the model.
- Lower temperature (0.1–0.3) for tool-heavy turns and apply repetition penalties via the sampler.
- Use specialized chat templates, such as Froggeric's Qwen fixed template, which may alleviate looping issues.
