/**
 * Shared source-file loader used by tools that accept `source_paths[]`.
 *
 * The point of a path-based tool input is context preservation — Claude does
 * not pre-read the file, the server does. Keep this module fast and boring.
 */
export interface LoadedSource {
    path: string;
    body: string;
}
/**
 * Hard cap on a single source file's byte size — mirrors the indexer's
 * MAX_FILE_BYTES. loadSources only ever uses the first `perFileMax` CHARS, but
 * it read the WHOLE file into a JS string first: a multi-hundred-MB log (the
 * advertised incident_pack workload) OOM'd, and a file over V8's ~512MB string
 * limit threw ERR_STRING_TOO_LONG surfaced as a misleading SOURCE_PATH_NOT_FOUND.
 * We now reject over-cap files via the already-open handle's stat BEFORE any
 * read (never buffering the whole file), with a distinct SOURCE_FILE_TOO_LARGE
 * so callers can tell "too big" apart from "missing". (M7, 2026-07 health pass.)
 */
export declare const MAX_SOURCE_BYTES: number;
/**
 * Read each path, slice to `perFileMax` chars per file, return in input order.
 * Throws SOURCE_PATH_NOT_FOUND on the first missing/unreadable path, and
 * SOURCE_FILE_TOO_LARGE on the first file whose byte size exceeds `maxBytes`
 * (default MAX_SOURCE_BYTES) — either way failing loud instead of a partial
 * answer or an OOM. `maxBytes` is an override seam (tests / future per-caller
 * caps); production callers pass two args and get the default.
 */
export declare function loadSources(paths: string[], perFileMax: number, maxBytes?: number): Promise<LoadedSource[]>;
/** Format loaded sources as a single prompt block with begin/end markers per file. */
export declare function formatSourcesBlock(sources: LoadedSource[]): string;
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