/**
 * Human renderer for `cleo briefing`.
 *
 * Renders a {@link SessionBriefing} payload as readable text.
 *
 * Source of truth is TASKS + BRAIN (`tasks.db` + `brain.db`); this renderer
 * is a pure formatter that NEVER touches the filesystem. Sections render
 * only when their backing data is non-empty so a quiet briefing stays quiet.
 *
 * Sections (in order):
 * 1. Last session — handoff note, completed/created tasks, decisions
 * 2. Current task
 * 3. Active blockers
 * 4. Next suggested
 * 5. Open epics
 * 6. Recent decisions / observations from BRAIN
 *
 * Migrated from `packages/cleo/src/cli/renderers/system.ts` (T10131 — B6).
 *
 * @task T1593
 * @task T10131
 */
export declare function renderBriefing(data: Record<string, unknown>, quiet: boolean): string;
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