Module engine 

Re-exports

pub use react_loop_guard::NoopGuard;

pub use react_loop_guard::ReactLoopGuard;

pub use crate::types::AgentResult;

pub use auto_continue::AutoContinueMiddleware;

pub use max_turns_nudge::MaxTurnsNudgeConfig;

pub use max_turns_nudge::MaxTurnsNudgeMiddleware;

Modules

auto_continue

max_turns_nudge

react_loop_guard

Structs

AgentBuilder

AgentRuntime

AgentSession

Stable identity + rolling state of a single chat thread.

AllowAllApprovalHandler

ApprovalRequest

ConsecutiveFailureRecovery

Recovery strategy that tracks consecutive failures per tool and stops after a limit.

ContextWindowManager

DefaultPipeline

Default pipeline: ToolPolicy hooks + timeout + output size limit.

DenyAllApprovalHandler

GuardCtx

Guard context information — built by runtime, passed to guard.

InMemorySessionStore

PostLlmCtx

PreLlmCtx

RetryOnError

Continue on tool failure, feeding the error back to the model

SessionId

Unique identifier for an agent session.

SessionManager

StopOnError

Default strategy: stop on tool failure.

ToolEnforcementConfig

ToolEnforcementMiddleware

TurnFactMiddleware

Turn fact summary middleware — injects structured facts from the previous turn’s tool results into the next user message.

TurnToolLimitMiddleware

Middleware that enforces a hard limit on tool calls per turn.

UserMessageCtx

Enums

ApprovalDecision

GuardDecision

Guard decision — returned by guard, executed by base loop.

QueueMode

Controls how queued messages are drained each turn.

RiskLevel

ToolErrorAction

Action taken by the runtime after a tool execution failure

Traits

ApprovalHandler

Trait for handling tool approval requests.

ContextCompaction

Trait for inline context compaction within the react loop.

Middleware

SessionStore

Session Persistence Adapter

ToolErrorRecovery

Recovery strategy after a tool execution failure

ToolExecutionPipeline

Pure execution pipeline — cares about how to safely execute a tool.

Functions

estimate_messages_tokens

Estimate total tokens across a message list using ContextWindowManager::message_tokens.

first_system_prompt

Find the first non-ephemeral System message (the system prompt).