/**
 * Renders the gap-signal tail appended to a pipeline step's Knowledge
 * Base section. The tail instructs downstream agents to emit a
 * knowledge_gap_signal observability event when they search the
 * knowledge base for a topic and find nothing.
 *
 * Returns the empty string when SCAFFOLD_GAP_SIGNAL_QUIET=1 so test
 * fixtures and CI stay deterministic.
 *
 * Called from two sites:
 *  - src/core/assembly/engine.ts (runtime assembly path)
 *  - src/core/adapters/claude-code.ts (generated-command path)
 */
export interface RenderGapSignalTailOptions {
    stepName: string;
}
export declare function renderGapSignalTail(opts: RenderGapSignalTailOptions): string;
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