export declare const PROTOCOL_VERSION: 1;
export declare const MAX_DRAFT_BYTES = 8192;
export declare const MAX_SUGGESTION_BYTES = 1024;
export declare const MAX_SUGGESTION_CHARACTERS = 160;
export declare const MAX_SUGGESTION_TOKENS = 64;
export interface AdapterCapabilities {
    readonly transport: "native";
    readonly inlineRender: "eol-only";
    readonly bufferRead: true;
    readonly cursorRead: true;
    readonly atomicAcceptance: true;
    readonly cancellation: true;
    readonly resizeAwareness: true;
    readonly alternateScreenSafety: true;
    readonly nativeCompletionAwareness: true;
    readonly attachmentReferences: false;
}
export interface PromptSnapshot {
    readonly revision: number;
    readonly text: string;
    readonly cursorByte: number;
}
export interface SuggestionCandidate {
    readonly protocolVersion: typeof PROTOCOL_VERSION;
    readonly requestId: string;
    readonly revision: number;
    readonly edit: {
        readonly startByte: number;
        readonly endByte: number;
        readonly text: string;
    };
    /** Zero while partial; otherwise normalized, bounded visible-output tokens. */
    readonly tokenCount: number;
}
export type ClearReason = "accepted" | "dismissed" | "edited" | "pasted" | "cursor-moved" | "submitted" | "stale" | "unsafe" | "layout-unknown" | "session-changed" | "disabled" | "provider-error";
export type ValidationResult = {
    readonly ok: true;
    readonly value: SuggestionCandidate;
} | {
    readonly ok: false;
};
export declare function parseSuggestionCandidate(input: unknown): ValidationResult;
export declare function isSafeSuggestion(value: unknown): value is string;
export declare function containsUnsafeTerminalText(value: string): boolean;
export declare function sanitizeSuggestionText(value: string): string;
export declare function utf8ByteLength(value: string): number;
export declare function isWellFormedUnicode(value: string): boolean;
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