/**
 * Stable group-key builders for `peaks code context-audit` — the
 * `(tool name, short input key)` half of the grouping contract.
 *
 * Moved out of `./context-audit.ts` (wave 3, eslint-family sweep). Every
 * case body, predicate and clip budget below is copied EXACTLY from the
 * original switch; the switch is only split into two sequential halves so
 * no single function crosses the complexity ceiling. For every `(tool,
 * input)` pair the returned key is identical to before the move.
 */
/**
 * Build the stable group key for one tool call. Unknown tools fall back to a
 * clipped JSON rendering of their input so the group is still recognizable.
 */
export declare function contextAuditKey(tool: string, input: unknown): string;