/**
 * The dotted chain the cursor is in the middle of typing.
 *
 * Deliberately TEXTUAL, and only for completion. `chainAt` (over the parsed
 * CEL AST) is what hover and go-to-declaration use, because there the
 * expression is complete and the cursor sits on a specific identifier whose
 * span matters. Completion fires on text that frequently does not parse —
 * `req.` is not an expression — so a parse-first approach would go silent
 * exactly while the user is asking for help. An open segment recovers to its
 * longest parseable PREFIX, which by definition drops the token being typed.
 */
import type { CelSegment } from "@telorun/analyzer";
export interface CelCursorChain {
    /** Identifiers resolved before the token under the cursor (`req.query.` → `["req","query"]`). */
    prefix: string[];
    /** The partial identifier being typed, possibly empty. */
    token: string;
    /** True when the cursor follows a `.` — a member position, where only the
     *  prefix's members are offered and functions are not. */
    member: boolean;
}
/**
 * Split the text before the cursor into a resolved prefix and a partial token.
 *
 * Returns undefined when the cursor does not follow an identifier-shaped run —
 * after an operator, inside a string literal's content, at the start of an
 * empty body — where the caller offers the root scope instead of a member list.
 */
export declare function celCursorChain(text: string, segment: CelSegment, offset: number): CelCursorChain | undefined;
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