/**
 * Validator for Handlebars for Marketing Cloud Next (MCN).
 *
 * Runs only when a document targets Marketing Cloud Next (`targetPlatform:
 * 'next'`). It is mutually exclusive with the GTL validator, which runs only
 * for Engagement. Diagnostics emitted here:
 *
 *   - `handlebars/syntax-error`        (Error)   malformed Handlebars syntax
 *   - `handlebars/unsupported-construct` (Error) partials, decorators, log, …
 *   - `handlebars/unknown-helper`      (Warning) helper not in the MCN catalog
 *   - `handlebars/unknown-binding`     (Warning) unknown `{!$...}` data binding
 *
 * The MCN templating engine is based on Handlebars.Net and is locked down: you
 * cannot register helpers, partials, or decorators. Anything outside the fixed
 * catalog is therefore flagged.
 */
import type { Diagnostic } from '../types.js';
export declare const DIAG_CODE_HBS_SYNTAX = "handlebars/syntax-error";
export declare const DIAG_CODE_HBS_UNSUPPORTED_CONSTRUCT = "handlebars/unsupported-construct";
export declare const DIAG_CODE_HBS_UNKNOWN_HELPER = "handlebars/unknown-helper";
export declare const DIAG_CODE_HBS_UNKNOWN_BINDING = "handlebars/unknown-binding";
/** Payload attached to unknown-helper / unknown-binding diagnostics for quick fixes. */
export interface HandlebarsSuggestionData {
    /** The unknown name the user typed (helper name or binding token). */
    typed: string;
    /** The closest known name to suggest as a replacement. */
    suggestion: string;
}
/**
 * MCN Handlebars diagnostic codes that duplicate eslint-plugin-sfmc (`-next`
 * config) rules and can be suppressed via `disableLspDiagnosticsForEslintRules`:
 *   - unsupported-construct → `hbs-no-unsupported-construct`
 *   - unknown-helper → `hbs-no-unknown-helper`
 *   - unknown-binding → `hbs-no-unknown-binding`
 *
 * `handlebars/syntax-error` is deliberately excluded: it is a parser-level error
 * with no eslint-plugin-sfmc equivalent, so it must always surface.
 */
export declare const HBS_ESLINT_DUPLICATE_DIAG_CODES: Set<string>;
/**
 * Validate Handlebars for Marketing Cloud Next within a (possibly mixed)
 * document. AMPscript regions are blanked before parsing so the Handlebars
 * parser does not choke on `%%[...]%%` / `%%=...=%%` syntax. Diagnostics are
 * pushed in place, honoring the shared problem budget.
 * @param text - Full document text.
 * @param diagnostics - Diagnostics sink (shared across validators).
 * @param remainingBudget - Maximum number of additional problems to report.
 */
export declare function validateMcnHandlebars(text: string, diagnostics: Diagnostic[], remainingBudget: number): void;
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