/**
 * Parser for the sub-agent streaming format with search/replace support.
 *
 * The LLM outputs edits using markers with square-bracket delimiters
 * (to avoid confusion with HTML angle brackets in the content):
 *
 * ```
 * [[[FIELD:0]]]
 * [[[SEARCH]]]
 * misspelled word
 * [[[REPLACE]]]
 * correctly spelled word
 * [[[FIELD:2]]]
 * [[[FULL]]]
 * complete new value for field 2
 * ```
 *
 * - `[[[FIELD:N]]]` starts edits for field at 0-based index N.
 * - `[[[SEARCH]]]...[[[REPLACE]]]...` is a find-and-replace pair.
 * - `[[[FULL]]]` replaces the entire field value.
 * - Multiple SEARCH/REPLACE pairs per field are allowed.
 * - Only fields that need changes are included.
 */
export type ParserEvent = {
    type: 'field_start';
    index: number;
    mode: 'full' | 'patch';
} | {
    type: 'full_delta';
    index: number;
    value: string;
} | {
    type: 'replace_delta';
    index: number;
    search: string;
    value: string;
} | {
    type: 'operation_end';
    index: number;
    search: string;
    replace: string;
} | {
    type: 'field_end';
    index: number;
};
export declare class FieldStreamParser {
    private buffer;
    private state;
    private fieldIndex;
    private fieldMode;
    private currentValue;
    private currentSearch;
    private stripLeadingNewline;
    /**
     * Feed a text chunk and return any events produced.
     */
    feed(text: string): ParserEvent[];
    /**
     * Call when the stream ends to close any open state.
     */
    flush(): ParserEvent[];
    /**
     * Try to match a marker at the start of the buffer.
     * Returns true if a marker was consumed.
     */
    private tryMatchMarker;
    /**
     * Consume a marker from the buffer, stripping the optional newline after it.
     */
    private consumeMarker;
    /**
     * Append content to the current accumulator and emit deltas.
     */
    private appendContent;
    /**
     * Emit buffered content as delta, keeping a tail for partial markers.
     * Returns true if content was emitted.
     */
    private emitBufferedContent;
    /**
     * Close any open operation or field, emitting the appropriate events.
     */
    private closeCurrentState;
    private trimTrailingNewline;
}