/**
 * @fileoverview Shared formatting helpers for tool format() functions and
 * searchCriteria enrichment trailers.
 * @module mcp-server/tools/utils/format-helpers
 */
/**
 * Flatten CR/LF in upstream text interpolated into a single line, so a line
 * break in the value cannot start a new `content[]` line and forge structure:
 * each whitespace run holding a CR or LF becomes one space, and every other
 * run is kept as is. Runs in time linear in the input. Applied to a value, or
 * to a whole rendered row whose every part is meant to share one line.
 * `structuredContent` keeps the value verbatim.
 */
export declare function oneLine(value: string): string;
export declare function oneLine(value: string | undefined): string | undefined;
/**
 * Render study fields not already covered by the primary formatter.
 * `renderedPrefixes` uses dot-notation paths matching the study structure
 * (e.g., `"protocolSection.identificationModule.nctId"`).
 *
 * Returns indented lines suitable for appending after a study's primary output,
 * one row per field: a line break in a value folds to a space, unless the leaf
 * is long-form prose (`PROSE_LEAF`), which keeps its breaks.
 */
export declare function formatRemainingStudyFields(study: Record<string, unknown>, renderedPrefixes: ReadonlySet<string>, { maxLines, maxValueLen }?: {
    maxLines?: number | undefined;
    maxValueLen?: number | undefined;
}): string[];
/**
 * A searchCriteria value as Markdown a CommonMark parse reads back as written,
 * so a `content[]`-only caller can copy it into its next call unchanged. A
 * string is a code literal: a code span sized past its longest backtick run,
 * or, when it holds a line break, a fenced block on lines of its own — a code
 * span cannot hold one, since the block parse ends the line there and reads
 * the next as a heading, list item, or quote. Each entry of a list renders the
 * same way, inside `[…]`; a number or boolean renders as itself.
 */
export declare function formatEchoValue(value: unknown): string;
/**
 * The searchCriteria trailer of `clinicaltrials_search_studies` and
 * `clinicaltrials_get_study_count`: one `- **key:** value` line per criterion.
 */
export declare function formatSearchCriteria(criteria: Record<string, unknown>): string;
//# sourceMappingURL=format-helpers.d.ts.map