AxAgentContextEvent

type AxAgentContextEvent = 
  | {
  actionLogEntryCount: number;
  checkpointActive: boolean;
  effectiveBudgetChars: number;
  fixedPromptChars: number;
  guidanceLogEntryCount: number;
  kind: "budget_check";
  mutablePromptChars: number;
  pressure: AxAgentContextPressure;
  stage: AxAgentContextStage;
  targetPromptChars: number;
  turn: number;
}
  | {
  coveredTurns: number[];
  kind: "checkpoint_created" | "checkpoint_cleared";
  reason: "over_budget" | "under_budget" | "disabled";
  stage: AxAgentContextStage;
  summaryChars?: number;
  turn: number;
}
  | {
  kind: "tombstone_created";
  resolvedByTurn: number;
  source: "deterministic" | "model";
  stage: AxAgentContextStage;
  summaryChars: number;
  turn: number;
}
  | {
  kind: "action_compacted";
  mode: "distill" | "compact";
  originalChars: number;
  reason: "structured_output" | "superseded" | "pressure" | "proactive" | "lean";
  renderedChars: number;
  stage: AxAgentContextStage;
  turn: number;
};