Module state 

Structs

ApiFailureTracker

API failure tracking for exponential backoff

HistoryValidationReport

Validation report for conversation history state

MissingOutput

Record of a missing output in conversation history

ToolCallId

Unique identifier for a tool call.

Enums

OutputStatus

Status of a tool execution

PairableHistoryItem

Items that participate in call/output pairing for validation

Functions

ensure_call_outputs_present

Ensure all tool calls have corresponding outputs in the message list.

normalize_history

Normalize history to enforce call/output pairing invariants.

recover_history_from_crash

Recover from crashed or interrupted session by fixing history invariants.

remove_orphan_outputs

Remove outputs without corresponding calls (orphaned outputs) from the message list.

safe_history_split_point

Find a split point that keeps tool-call outputs paired with their calls.

summarize_list

validate_history_invariants

Validate that conversation history maintains call/output invariants.