/**
 * Pi coding agent extension for context-mode.
 *
 * Follows the OpenClaw adapter pattern: imports shared session modules,
 * registers Pi-specific hooks. NO copy-paste of session logic.
 * NO external npm dependencies beyond what Pi runtime provides.
 *
 * Entry point: `export default function(pi: ExtensionAPI) { ... }`
 *
 * Lifecycle: session_start, tool_call, tool_result, before_agent_start,
 * session_before_compact, session_compact, session_shutdown.
 */
/** Pi extension default export. Called once by Pi runtime with the extension API. */
export default function piExtension(pi: any): void;