Enum ReasoningStepKind 

#[repr(u8)]
pub enum ReasoningStepKind {
    Thought = 1,
    ToolCall = 2,
    Observation = 3,
    Decision = 4,
    PlanStep = 5,
    FinalAction = 6,
    Error = 7,
    Retrieval = 8,
}

The semantic category of a recorded reasoning step.

These map directly to the observation/thought/action loop used in ReAct-style agents and are compatible with LangChain, LlamaIndex, AutoGen, and OpenAI Agents SDK trace structures.

The numeric value is stable across library versions and appears in the Merkle leaf hash. Adding a new variant requires a new leaf domain version.

Variants

Thought = 1

An internal model thought or chain-of-thought step.

ToolCall = 2

A tool or function call executed by the agent.

Observation = 3

The output returned from a tool or function call.

Decision = 4

A branching decision point with enumerated alternatives considered.

PlanStep = 5

A high-level plan step decomposed from the goal.

FinalAction = 6

The final action taken as the outcome of reasoning.

Error = 7

An error or exception that influenced reasoning.

Retrieval = 8

Retrieval result incorporated into reasoning context.

Implementations

impl ReasoningStepKind

pub fn as_u8(self) -> u8

pub fn name(self) -> &'static str

Trait Implementations

impl Clone for ReasoningStepKind

fn clone(&self) -> ReasoningStepKind

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ReasoningStepKind

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for ReasoningStepKind

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Display for ReasoningStepKind

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

Formats the value using the given formatter.

impl Hash for ReasoningStepKind

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for ReasoningStepKind

fn eq(&self, other: &ReasoningStepKind) -> 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 Serialize for ReasoningStepKind

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl Copy for ReasoningStepKind

impl Eq for ReasoningStepKind

impl StructuralPartialEq for ReasoningStepKind