/**
 * @fileoverview Resolve the Codex (OpenAI) CLI binary across common install paths.
 *
 * Mirrors opencode-cli-resolver.ts pattern. Finds the `codex` binary
 * and provides an augmented PATH string for tmux sessions.
 *
 * @module utils/codex-cli-resolver
 */
/**
 * Finds the directory containing the `codex` binary.
 * Checks `which codex` first, then falls back to common install locations.
 * Result is cached for subsequent calls.
 *
 * @returns Directory path, or null if not found
 */
export declare function resolveCodexDir(): string | null;
/**
 * Check if Codex CLI is available on the system.
 */
export declare function isCodexAvailable(): boolean;
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