import { type RuleContext, type RuleValue } from "./types.mjs";
/**
 * Resolve a rule to a value against `ctx`. Accepts a `{$rule}` placeholder or a
 * bare node. A malformed or unknown node throws a `ChartRuleError` (never a
 * native `TypeError`), so a caller reading an untrusted, deserialized rule can
 * catch every failure with one type. When the rule is a colour placeholder, the
 * result is checked to be a colour (`string | null`) — a rule that resolves to a
 * number or boolean is a `RuleTypeError`, not something the renderer paints.
 *
 * Pure and non-recursive: the only inputs are the validated flat rule and the
 * context. No clock, randomness, callbacks, or I/O.
 */
export declare function evaluate(rule: unknown, ctx: RuleContext): RuleValue;
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