import type { Action } from '../app-action-type.js';
import type { State } from '../app-state.js';
declare const composerActionTypes: readonly ["brainPromptSet", "brainPromptClear", "pickerOpen", "pickerClose", "pickerSetMatches", "pickerMove", "toolStarted", "toolEnded", "toolStreamAppend", "toolStreamClear", "enqueue", "dequeueFirst", "queueClear", "queueDelete", "queueToggleRefine", "slashPickerOpen", "slashPickerClose", "slashPickerMove", "historyPush", "historyUp", "historyDown", "setInputHistory", "clearInputHistory", "modelPickerOpen", "modelPickerClose", "modelPickerMove", "modelPickerPickProvider", "modelPickerBack", "modelPickerSearch", "modelPickerHint", "autonomyPickerOpen", "autonomyPickerClose", "autonomyPickerMove", "autonomyPickerHint", "themePickerOpen", "themePickerClose", "themePickerMove", "themePickerHint", "modePickerOpen", "modePickerClose", "modePickerMove", "modePickerHint", "skillPickerOpen", "skillPickerClose", "skillPickerMove", "skillPickerHint", "resourceMenuOpen", "resourceMenuClose", "resourceMenuMove", "resourceMenuHint", "resourceMenuFilter", "resourceMenuConfirm", "designPickerOpen", "designPickerClose", "designPickerMove", "designPickerStack", "promptPickerOpen", "promptPickerClose", "promptPickerMove", "promptPickerCategory", "resumePickerOpen", "resumePickerClose", "resumePickerMove", "resumePickerBusy", "resumePickerHint", "resumePickerError", "replaceHistory"];
type ComposerAction = Extract<Action, {
    type: (typeof composerActionTypes)[number];
}>;
export declare function isComposerAction(action: Action): action is ComposerAction;
/** Reduces composer tools, queues, history navigation, and session/model pickers. */
export declare function reduceComposer(state: State, action: ComposerAction): State;
export {};
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