/**
 * client-session.ts — read the Claude Code session id captured by the
 * hula session-hook (see src/commands/session-hook.ts).
 *
 * The hook is a Claude Code PreToolUse hook: when a chat session runs
 * /hula-launch (i.e. Bash invokes `hula script launch-run`), it writes
 *   $HOME/.hublaunch-sessions/<repo-dir-name>/<branch>.json
 * moments before the hula CLI itself runs. `hula launch` reads it here and
 * forwards it to hula-server as `clientSessionId` (server PR #419) so client
 * tooling can later resume the launching session (/hula-verify, /hula-info).
 */
/**
 * Return the Claude Code session id recorded for a branch launch, or
 * undefined when none was captured (launch from a plain terminal, CI, or a
 * repo where the hook isn't registered). Never throws — provenance capture
 * must not interfere with launching.
 *
 * @param branchName - the branch/issue name passed to `hula launch`
 * @param projectRoot - consumer repo root (defaults to cwd; the hook keys the
 *   mapping directory by the repo directory's basename)
 */
export declare function readClientSessionId(branchName: string, projectRoot?: string): string | undefined;
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