e4d1499230* fix(studio): prevent small models from stalling on tool-calling tasks
Small GGUF models (< 9B params) in "Think, Search, Code" mode would
often describe what they planned to do ("Let me create this dashboard")
and then stop generating without ever calling a tool.
Three changes:
1. Simplify web_tips for small models: remove the "fetch its full content
by calling web_search with the url parameter" guidance for models < 9B.
This multi-step instruction causes small models to plan elaborate
search-then-fetch-then-code sequences they cannot reliably execute.
2. Add "always call tools directly" imperative to the system prompt nudge
so models act immediately instead of narrating their intentions.
3. Add plan-without-action re-prompt in the agentic loop: when the model
emits planning text (matching patterns like "let me", "I'll", etc.)
without calling any tool, inject a nudge asking it to call the tool
and continue the loop. Capped at 2 re-prompts per request.
Benchmarked with Qwen3.5-4B-GGUF (N=5 trials per variant):
- Baseline: 40% of requests had any tool call
- Combined fix: 100% of requests had at least one tool call
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Co-authored-by: Daniel Han <danielhanchen@users.noreply.github.com>
Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>
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