Optimize the native tool-calling loop for qwen2.5:3b on CPU, where it
previously invented paths (/ai/bin/bash), ran scripts it never wrote, and
silently dropped valid actions. Three changes:
- NATIVE_SYSTEM rewritten directive: explicit write→chmod→run workflow,
relative paths only, never run an uncreated file, never guess interpreter
paths, fix the cause on non-zero exit.
- New _sandbox_facts() probe injects LIVE SANDBOX STATE (real cwd, bash
path, current files) into the system prompt so the model anchors to
ground truth instead of guessing.
- OllamaProvider recovers tool calls qwen emits as <tool_call>{json}</…>
TEXT in content (brace-balanced JSON scan), so a correct action isn't lost.
- Bump Ollama timeout 120→240s: the tool turn is non-streaming and a long
write_file can exceed a tighter cap on a contended CPU box.
Live-validated (podman/Kali): 0/3 incoherent → reliable write/run with
self-correction on exit=126 for both single- and multi-script tasks.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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