/**
 * Guards the Codex SDK's internal `child_process.spawn` against unhandled
 * 'error' events on stdio streams.
 *
 * The SDK spawns the Codex CLI binary and writes the turn input to the
 * child's stdin immediately. When the child exits before the write completes,
 * the write fails with EPIPE and the 'error' event on stdin has no listener,
 * crashing the host process. The SDK only attaches an 'error' listener to
 * the ChildProcess itself, not to its stdio streams.
 *
 * This module patches `child_process.spawn` at the CJS module layer and
 * synchronizes Node's ESM built-in bindings. The wrapper only activates for
 * Codex binary names or the SDK's argument and environment markers; every
 * other spawn passes through untouched.
 *
 * For matching spawns, `guardChildProcessStreams` attaches 'error' listeners
 * on the process and each stdio stream. The guard logs and swallows the
 * error, terminates the child when a stream fails, and tears down listeners
 * on child close. The SDK can then surface `Codex Exec exited with ...`
 * through the existing provider-error classification.
 *
 * Matching spawns also get their stdout routed through the U+2028 / U+2029
 * escape stream from `json-line-separator-stream.ts`, so the SDK's
 * readline-based JSONL parser never splits one JSON event into fragments.
 * The replacement happens synchronously inside the spawn wrapper, before the
 * SDK reads `child.stdout`.
 */
export declare function installCodexSpawnGuard(): void;
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