/** Minimal YAML subset parser for agent/graph.yaml (no dependency). */
export type GraphNode = {
    id: string;
    needs: string[];
    tools: string[];
    writes: string[];
    eval: string;
    maxAttempts: number;
    refs: string[];
    optional?: boolean;
    inputs?: string[];
    optionalInputs?: string[];
    optionalRefs?: string[];
    kind?: "agent" | "tool" | "critic";
    command?: string[];
    repair?: string;
    historicalAfter?: string;
    subjectPaths?: string[];
};
export type SkillGraph = {
    version: number;
    stop_at: string;
    nodes: GraphNode[];
};
/** Parse the Vitris agent graph YAML (intentionally small surface). */
export declare function parseGraphYaml(text: string): SkillGraph;
export type NodeStatus = "pending" | "in_progress" | "done" | "failed";
export type CumulativeSpend = {
    iterations: number;
    calls: number;
    inputTokens: number;
    outputTokens: number;
    durationMs: number;
    jevCalls?: number;
    jevInputTokens?: number;
    jevOutputTokens?: number;
    agentTokensMeasured?: boolean;
    hasUnmeteredStages?: boolean;
    toolCalls?: number;
    toolDurationMs?: number;
    reviewer?: {
        calls: number;
        inputTokens: number;
        outputTokens: number;
        tokens: number;
        durationMs: number;
        reservedTokens: number;
        unknownCalls: number;
    };
};
export type AgentState = {
    version: number;
    status: string;
    current: string | null;
    preview_ready: boolean;
    launched: boolean;
    iteration: number;
    cumulativeSpend?: CumulativeSpend;
    limits?: {
        iterations: number;
        tokens?: number;
        durationMs?: number;
    };
    consecutiveFailures?: Record<string, number>;
    nodes: Record<string, {
        status: NodeStatus;
        attempts: number;
        invocationBaseline?: number;
        inputHash?: string;
        outputHash?: string;
        skillHash?: string;
        failures?: string[];
        themeSelectionHash?: string | null;
    }>;
};
export declare function nextNode(graph: SkillGraph, state: AgentState, opts?: {
    includeOptional?: boolean;
}): GraphNode | null;
export declare function isPreviewReady(graph: SkillGraph, state: AgentState): boolean;
export declare function validateGraph(graph: SkillGraph): void;
export declare function initialState(graph: SkillGraph): AgentState;
export declare function invalidate(graph: SkillGraph, state: AgentState, id: string): void;