/**
 * Build a structural signature for a model string.
 *
 * Two values produce the same signature iff their sequence of `{{name}}`
 * pills is identical. The editor uses this to skip a DOM rebuild for
 * plain-text edits that do not change the pill set, which preserves the
 * live caret and avoids any flicker.
 *
 * Returns an empty signature when pill rendering is disabled or the text
 * contains no pill markers — both cases share a single "no pills" bucket.
 */
export declare const pillSignature: (text: string, withVariables: boolean) => string;
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