/**
 * What a deleted session leaves behind outside its own rows: the per-session
 * Codex CODEX_HOME overlay, which holds a session-scoped capability in its
 * config.toml, and any heartbeats it armed, which have no owner left to fire
 * into. Both are idempotent and a no-op for a session that never had them.
 */
export declare function cleanUpDeletedSession(sessionId: string): void;
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