---

name: prompting-tool-use-tokenization description: "Route Qwen system prompts, ReAct/tool use, OpenAI-style function calling, ChatML, special tokens, tokenizer safety, and BPE merge workflows." disable-model-invocation: true metadata: disco-role: operating license: Apache 2.0

Qwen Prompting, Tool Use, and Tokenization

Use this sub-skill when the user wants Qwen-specific system prompts, ReAct prompting, OpenAI-style function calling, Hugging Face Agent patterns, function-calling fine-tune samples, ChatML behavior, special-token safety, or tokenizer BPE merge extension.

Safe start

• Use scripts/validate_function_call_messages.py before debugging a function-calling request or fine-tune sample.
• Use scripts/qwen_tokenizer_merge_helper.py for a safe local BPE-merge helper when extending tokenizer merge files.
• Keep prompt/tool behavior separate from model loading and server launch.

Routes

User request	Read
System prompts, role/language/task/behavior control, or stable assistant behavior across turns	references/system-prompts.md
ReAct template, function schemas, OpenAI-compatible message conversion, Observation: stop words, fine-tune samples for function calling	references/function-calling-and-react.md
ChatML roles, `<	im_start
Invalid role order, streaming function calls, tokenizer decode issues, special-token injection, or fine-tune sample mistakes	references/troubleshooting.md

Boundaries

• For loading a model before calling chat, use ../inference-model-loading/SKILL.md.
• For launching an OpenAI-compatible server, use ../serving-deployment/SKILL.md.
• For fine-tuning command plans, use ../finetuning-quantization/SKILL.md.
• For plugin/tool benchmark reproduction, use ../evaluation-reproduction/SKILL.md.

Operating rules

• Qwen's OpenAI-style function calling is implemented through ReAct text conversion, not through a separate hidden tool runtime.
• The local API server rejects function calling with streaming; route users to non-streaming requests when functions are present.
• Do not allow untrusted text containing special-token surface forms to be treated as control tokens unless the user deliberately wants that behavior.
• Do not add ordinary vocabulary tokens casually; Qwen's tokenizer documentation discourages adding regular tokens and preserves extra special tokens for controlled uses.