export declare const SESSION_BACKENDS: readonly ["claude", "pi", "codex"];
export interface SessionRegistryWriter {
    generateSessionName(): Promise<string>;
    registerSession(name: string, opts: {
        sessionId: string;
        channel: string;
        backend: string;
        kind: 'local' | 'scheduled';
        projectId: string;
        label?: string | null;
        profileName?: string | null;
    }): Promise<void>;
}
export interface RegisterNamedSessionOpts {
    sessionId: string;
    channel: string;
    backend: string;
    projectId: string;
    kind?: 'local' | 'scheduled';
    label?: string | null;
    profileName?: string | null;
}
/** Generate a fresh session name and register a registry record for sessionId. Returns the name.
 *  Centralizes the generateSessionName + registerSession pairing used by inbound-message session
 *  creation (agent-runner) and TUI fresh-session creation. */
export declare function registerNamedSession(store: SessionRegistryWriter, opts: RegisterNamedSessionOpts): Promise<string>;
export interface AttachExistingSessionOpts {
    sessionId: string;
    sessionName: string;
    backend: string;
    profileName?: string | null;
}
/** Attach a channel to an existing session: restore its profile (if any), point sessions.json at it,
 *  and switch the conversation ledger. Mirrors the !resume switch sequence. */
export declare function attachExistingSession(channel: string, opts: AttachExistingSessionOpts): Promise<void>;
/** Clear a channel's session state: drop sessions.json keys for every backend, clean session
 *  backups, and clear the conversation ledger. Mirrors the store-level half of !new. */
export declare function resetChannelSession(channel: string): Promise<void>;