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Nemotron-3-Super:120b and nemoclaw stalls due to OpenClaw's interpretation of end-of-turn #2051

@fetchingcat

Description

@fetchingcat

Description

When using the tutorial setup for spark (NemoClaw + Nemotron-3-Super:120b + local Ollama) on multi-step coding tasks, the agent silently stalls mid-task. The model returns an assistant response with only a thinking block (no toolCall and no visible text) and stopReason: "stop", which OpenClaw's loop treats as end-of-turn, so the conversation hangs waiting for the user instead of continuing. Reproducible by asking for any multi-file project, stalls consistently after 5–10 successful tool calls.

Possibly related to #1193

Reproduction Steps

Ask the agent in tui...

build a personal finance tracker API using FastAPI and SQLite. It should support user registration with JWT auth, CRUD for accounts and transactions, category tagging, and a monthly summary endpoint that shows spending by category. Include proper project structure, Pydantic models, and pytest tests.

Environment

GB10 DGX Spark NemoClaw + Nemotron-3-Super:120b + local Ollama
Following the tutorial from the site itself https://build.nvidia.com/spark/nemoclaw/instructions

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  • I confirmed this bug is reproducible
  • I searched existing issues and this is not a duplicate

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    area: local-modelsLocal model providers, downloads, launch, or connectivityarea: providersInference provider integrations and provider behavior

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