Enum ReasoningPolicy 

pub enum ReasoningPolicy {
    Include,
    Exclude,
}

Per-provider strategy for echoing back reasoning_content from historical assistant tool_call messages on subsequent requests.

Different thinking-model APIs contradict each other:

• Moonshot Kimi K2-thinking / K2.5 / K2.6 — MUST echo reasoning_content on every assistant tool_call message in history; otherwise returns 400 with “thinking is enabled but reasoning_content is missing in assistant tool call message at index N”.
• DeepSeek-R1 / deepseek-reasoner (V3 family) — MUST NOT include reasoning_content in subsequent requests; returns 400 if present.
• DeepSeek V4 family (deepseek-v4*, thinking mode) — opposite of V3: MUST echo reasoning_content on every assistant tool_call message, or the API returns 400 “The reasoning_content in the thinking mode must be passed back to the API”.
• MiniMax-M2 (default) — thinking is embedded in content as <think>...</think>, goes through the plain-text path; no separate field handling needed.
• Anthropic — uses a different thinking block structure in its own messages format; not affected by this policy.

Variants

Include

Echo the stored reasoning_content back on every assistant tool_call message. When the stored value is None, emit an empty string so the field is always present (some providers treat a missing field as “field absent” and error out even with empty content).

Exclude

Strip reasoning_content — never emit the field in outbound requests, even if we captured it from the stream. This is the safe default.

Trait Implementations

impl Clone for ReasoningPolicy

fn clone(&self) -> ReasoningPolicy

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for ReasoningPolicy

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl PartialEq for ReasoningPolicy

fn eq(&self, other: &ReasoningPolicy) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Copy for ReasoningPolicy

impl Eq for ReasoningPolicy

impl StructuralPartialEq for ReasoningPolicy