Module chat_template 

Structs

ChatTemplateOptions

ModelChatTemplate

Model-provided chat template, usually from GGUF or Hugging Face metadata.

PromptFunctionCall

PromptMessage

Common prompt-message shape used by both CLI run and OpenAI serve.

PromptToolCall

Tool-call shape exposed to model chat templates.

Enums

ModelReasoningProtocol

Resolved reasoning behavior of the model-owned template and output protocol. Unknown is not equivalent to a template that explicitly has no reasoning mode.

ReasoningEffort

Standard reasoning effort vocabulary. A request’s omitted or null effort is represented by Option::None, separately from the explicit "none" value.

ReasoningEffortSupport

An explicit model contract, independent of its output parser or whether a template happens to interpolate an effort variable. Unknown support must not be treated as a declaration that a requested effort is unsupported.

Functions

render_chat_prompt

Render OpenAI-style chat messages into the prompt string the model was trained on.

render_chat_prompt_with_model_template

render_chat_prompt_with_model_template_options

render_chat_prompt_with_tools

render_chat_prompt_with_tools_and_model_template

render_prompt_messages

Render common chat messages into the prompt string the model was trained on. Prefer a model-provided chat template when available; otherwise use a centralized legacy fallback for model families ferrum already supports.

render_prompt_messages_with_options