Enum HookEvent 

pub enum HookEvent<'a> {
    LoopIteration {
        turn: usize,
    },
    PreLlmCall {
        request: &'a CompletionRequest,
    },
    PostLlmCall {
        response: &'a CompletionResponse,
    },
    PreToolExecution {
        tool_name: &'a str,
        input: &'a Value,
    },
    PostToolExecution {
        tool_name: &'a str,
        output: &'a ToolOutput,
    },
    ContextCompaction {
        old_tokens: usize,
        new_tokens: usize,
    },
    SessionStart {
        session_id: &'a str,
    },
    SessionEnd {
        session_id: &'a str,
    },
}

Events fired during the agentic loop for observability.

Variants

LoopIteration

Start of a loop iteration.

Fields

turn: usize

The current turn number (0-indexed).

PreLlmCall

Before calling the LLM provider.

Fields

request: &'a CompletionRequest

The request about to be sent.

PostLlmCall

After receiving the LLM response.

Fields

response: &'a CompletionResponse

The response received.

PreToolExecution

Before executing a tool.

Fields

tool_name: &'a str

Name of the tool.

input: &'a Value

Input arguments.

PostToolExecution

After executing a tool.

Fields

tool_name: &'a str

Name of the tool.

output: &'a ToolOutput

The tool’s output.

ContextCompaction

Context was compacted.

Fields

old_tokens: usize

Token count before compaction.

new_tokens: usize

Token count after compaction.

SessionStart

A session started.

Fields

session_id: &'a str

The session identifier.

SessionEnd

A session ended.

Fields

session_id: &'a str

The session identifier.

Trait Implementations

impl<'a> Debug for HookEvent<'a>

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

Formats the value using the given formatter.