/**
 * `hula backlog <subcommand>` — the human-facing, project-level backlog command
 * group. Project-owned backlog items survive chat/session archival, so this
 * group targets a project (`--project owner/repo`, or the git remote) rather
 * than a single plan.
 *
 * Every subcommand prints exactly ONE JSON object on stdout (the same contract
 * as `hula script`/`hula plan`) and sends human-readable lines to stderr, so it
 * runs on the CLI fast path (registered in src/index.ts before the spinner).
 * It coexists with the chat-scoped `hula script backlog-*` scripts.
 *
 * Subcommands: add · list · launch.
 *
 * Stdout discipline: NEVER call logger.info/success (they write to stdout). All
 * progress/warnings go through logStderr.
 */
export declare function runBacklogCommand(argv: string[]): Promise<number>;
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