/**
 * Folds a route path's pre-split segments into its shape: every `{name:type}`
 * capture collapses to `{}` and every literal segment stays itself, so two
 * paths share a shape exactly when a request cannot tell them apart by
 * position. The body uses only indexed access, `.length` and primitive string
 * concatenation — no method lookups — because the serve runtime embeds this
 * exact source inside its hardened primordial Realm, where prototypes are
 * assumed hostile. Callers split on "/" themselves with whatever split they
 * trust.
 */
export declare function routeShapeFromSegments(segments: readonly string[]): string;
/**
 * The same definition as JavaScript source, for the serve runtime template.
 * Deriving it from the compiled function keeps the rule written once: editing
 * `routeShapeFromSegments` edits both referees.
 */
export declare const ROUTE_SHAPE_FROM_SEGMENTS_SOURCE: string;
/** The shape of a full route path, for callers outside the hardened Realm. */
export declare function routeShape(path: string): string;
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