/**
 * Extract the launch branch name from the portion of the command AFTER the
 * launch marker. Reproduces the bash positional parser:
 *   - `--handoff <user>` consumes two tokens (never shifts the branch position)
 *   - `--kill` marks a pure-kill (no new task ⇒ no record)
 *   - `--test` / `--kill-and-relaunch` / any other `--flag` (including the `--`
 *     passthrough separator) are skipped
 *   - remaining tokens are positional; positional[1] is the branch
 *
 * Returns null when this is a pure-kill or there is no branch positional.
 */
export declare function extractBranch(afterMarker: string): string | null;
/**
 * Parse a hook-JSON payload and, when it is a launch invocation with a branch,
 * write the session provenance file. Pure of stdin/exit handling so it can be
 * unit-tested. Never throws for expected "ignore" cases — returns silently.
 */
export declare function processHookInput(input: string): Promise<void>;
/**
 * `hula session-hook` entrypoint. Always resolves to exit code 0 — a capture
 * failure must never block the tool call.
 *
 * @param _argv unused; the hook reads its input from stdin.
 */
export declare function runSessionHook(_argv: string[]): Promise<number>;
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