/**
 * This package's own version, or '' when it cannot be read.
 *
 * A function rather than a module-scope constant, and in its own module rather than in bin.ts,
 * because two callers now need it: bin.ts for the startup nudge and `--version`, and `upgrade` for
 * the post-engine-bump check. Staying lazy is what keeps it importable from a command module —
 * cli.ts and everything it pulls in must have no side effects at import time (cli.test.ts imports
 * it for `subCommands`), and reading package.json at module scope would be one.
 *
 * `../../package.json` resolves to this package's manifest from both dist/update/ and src/update/,
 * so the same specifier works in the built CLI and under ts-jest.
 */
export declare function currentCliVersion(): string;