/**
 * Expression Evaluation
 *
 * Evaluates Core IR expressions against evaluation context.
 *
 * AXIOM A35: Expression evaluation is total; invalid operations return null, never throw.
 *
 * @see SPEC v0.4.0 §18
 */
import type { ExprNode } from "@manifesto-ai/core";
import type { EvaluationContext } from "./context.js";
/**
 * Evaluate a Core IR expression.
 *
 * Total function: returns null on any error, never throws.
 *
 * @param expr - Core IR expression
 * @param ctx - Evaluation context
 * @returns Evaluated value or null on error
 *
 * @see SPEC v0.4.0 §18.4, A35
 */
export declare function evaluateExpr(expr: ExprNode, ctx: EvaluationContext): unknown;