Models like gemma4, qwen3.5, and ministral served via Ollama's native
/api/chat respond to OpenAI-style tool schemas by emitting a single
native tool_call chunk and then stopping. The agent loop receives
1 token of round_response and no recognised ToolBlock, so the round
ends immediately — the user sees a one-token response.
Root cause: _is_api_model was True for any endpoint whose host appears
in _API_HOSTS (which includes "host.docker.internal" and "localhost")
OR whose model name matches a keyword like "gemma". Native Ollama
endpoints were never excluded from this path.
Fix: import _is_ollama_native_url from llm_core and treat native Ollama
endpoints (/api/chat, port 11434) as text-only by default — falling back
to the fenced-block tool path the local models are tuned for. The
per-endpoint supports_tools=True toggle (Settings → Endpoints) still
overrides this for users who have explicitly opted in.
Fixes#1567
Lucas Daniel
68da800dcb