/**
 * SEP host — the engine's implementation of the Smooth Extension Protocol.
 *
 * An extension is a long-lived subprocess speaking JSON-RPC 2.0 over ndjson on its
 * stdio (identical framing to MCP stdio). The canonical wire schemas live in the
 * `smooth-operator` repo at `spec/extension/`; {@link module:protocol} is this
 * host's typed view of that wire. The TS sibling of the Rust reference host at
 * `rust/smooth-operator-core/src/extension/`.
 *
 * Purely additive: nothing here runs unless a caller builds an {@link ExtensionHost}
 * and registers its {@link ExtensionHost.tools} into an agent. With no host built,
 * the agent loop behaves exactly as before.
 */
export * from './protocol.js';
export * from './manifest.js';
export { backoffFor, buildChildEnv, DefaultInboundHandler, ENV_PASSTHROUGH, ExtensionProcess, type InboundHandler, OBSERVE_QUEUE_CAP, PING_IDLE_MS, RESTART_BACKOFFS_MS, type SpawnSpec, } from './process.js';
export { DefaultHostDelegate, effectiveSubscriptions, ExtensionHost, foldHookChain, type FoldedHook, guardToolCallModify, hookDefaultTimeoutMs, hookFailClosed, type HostDelegate, type HookStep, type HookType, hookTypeFromName, type LoadFailure, toolOwnedBy, validateCommandContext, } from './host.js';
export { ExtensionTool, TOOL_EXECUTE_TIMEOUT_MS } from './tool_proxy.js';
/**
 * Canonical SEP event names the host dispatches to subscribed extensions. A
 * stringly-typed name is the wire contract; the engine's own event producers map
 * onto these.
 */
export declare const events: {
    readonly TURN_START: "turn_start";
    readonly TURN_END: "turn_end";
    readonly MESSAGE_START: "message_start";
    readonly MESSAGE_UPDATE: "message_update";
    readonly MESSAGE_END: "message_end";
    readonly TOOL_EXECUTION_START: "tool_execution_start";
    readonly TOOL_EXECUTION_UPDATE: "tool_execution_update";
    readonly TOOL_EXECUTION_END: "tool_execution_end";
    /** Delivered when the bounded observe queue shed events. Carries `{lost: N}`. */
    readonly EVENTS_LOST: "events_lost";
};
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