/**
 * Pure functions for building shell environment variable exports for Bedrock mode.
 *
 * All functions are pure (no side effects, no process.env access).
 */
import { ModelTriple } from './types.js';
/**
 * Shell-escapes a string value for use in a POSIX export statement.
 * Uses single-quote wrapping with embedded-single-quote escaping.
 * Strategy: wrap in single quotes, replace ' with '\'' (end-quote, escaped-quote, re-open-quote).
 */
export declare function shellEscape(value: string): string;
/**
 * Renders a list of [key, value] pairs as POSIX export statements.
 * Values are shell-escaped to prevent injection.
 *
 * Special case: CLAUDE_CONFIG_DIR_BEFORE_BEDROCK must be emitted with
 * double-quote expansion so the shell expands ${CLAUDE_CONFIG_DIR:-} at
 * eval-time, capturing the current value rather than storing the literal
 * string. All other values use single-quote escaping.
 */
export declare function renderExports(pairs: Array<[string, string]>): string;
/**
 * Builds the 8 environment variable pairs for Bedrock enable mode.
 * Returns pairs in stable, documented order.
 */
export declare function buildEnableEnv(opts: {
    models: ModelTriple;
    configDir: string;
    region: string;
}): Array<[string, string]>;
/**
 * Builds the shell snippet for disabling Bedrock mode.
 * Conditionally restores CLAUDE_CONFIG_DIR from CLAUDE_CONFIG_DIR_BEFORE_BEDROCK.
 * Returns an array of shell lines.
 */
export declare function buildDisableEnv(): string[];
/**
 * Renders the disable snippet as a single string.
 */
export declare function renderDisableExports(): string;
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