export type WorkflowRuleCondition = {
    kind: 'semantic';
    label: string;
} | {
    kind: 'when';
    expression: string;
} | {
    kind: 'aggregate';
    aggregate: 'all' | 'any';
    targetConditions: WorkflowRuleCondition[];
} | {
    kind: 'and';
    left: WorkflowRuleCondition;
    right: WorkflowRuleCondition;
};
/** Engine-produced aggregate label for a parallel participant that ended in terminal error. */
export declare const PARALLEL_TERMINAL_ERROR_LABEL = "error";
/** A semantic label selectable during Phase 3 status judgment. */
export interface SemanticRuleCandidate {
    label: string;
    appendix?: string;
}
interface SemanticRuleSource {
    condition: WorkflowRuleCondition;
    interactiveOnly?: boolean;
    appendix?: string;
}
export interface SemanticAppendixRule extends SemanticRuleSource {
    ruleIndex: number;
}
export interface SemanticAppendixConflict {
    ruleIndex: number;
    label: string;
}
export declare function isParallelSubStepRuleCondition(condition: WorkflowRuleCondition): boolean;
export declare function parseWorkflowRuleCondition(value: string): WorkflowRuleCondition;
export declare function formatWorkflowRuleCondition(condition: WorkflowRuleCondition): string;
export declare function semanticLabelsOf(condition: WorkflowRuleCondition): string[];
export declare function aggregateConditionsOf(condition: WorkflowRuleCondition): Extract<WorkflowRuleCondition, {
    kind: 'aggregate';
}>[];
export declare function dynamicParallelAggregateTargetLabel(condition: Extract<WorkflowRuleCondition, {
    kind: 'aggregate';
}>): string | undefined;
export declare function findSemanticAppendixConflicts(rules: readonly SemanticAppendixRule[]): SemanticAppendixConflict[];
export declare function hasAggregateCondition(condition: WorkflowRuleCondition): boolean;
/**
 * Returns each selectable semantic label once, in its first YAML appearance.
 */
export declare function semanticRuleCandidatesOf(rules: readonly SemanticRuleSource[], interactive: boolean): SemanticRuleCandidate[];
export declare function needsSemanticStatusJudgment(rules: readonly SemanticRuleSource[], interactive: boolean): boolean;
/** Detects an unquoted, complete state identifier reference. */
export declare function hasUnquotedIdentifierReference(expression: string, identifier: string): boolean;
/** Detects an unquoted companion state reference in a parsed rule condition. */
export declare function hasCompanionReference(condition: WorkflowRuleCondition): boolean;
export declare function terminalLabelOf(condition: WorkflowRuleCondition): string | undefined;
export {};
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