/** The `customType` stamped on the hidden custom message the inbox watcher
 *  sends for an existing node's situational-context update. */
export declare const SITUATIONAL_CONTEXT_CUSTOM_TYPE = "crtr-situational-context";
/** Upsert the node's current situational context (replace, not append) — the
 *  one sanctioned writer for the sidecar. No-op for blank text, so a caller
 *  can pass through an optional/empty value with no guard at the call site. */
export declare function appendSituationalContext(nodeId: string, text: string): void;
/** Read the current situational context, or null if none was ever set. */
export declare function readSituationalContext(nodeId: string): string | null;
/** The `<situational-context>` block for `nodeId`, or '' when none is set —
 *  callers append/filter this like any other optional sibling block. */
export declare function situationalContextBlock(nodeId: string): string;