Add a CLI flag --max-tail-lines <N> (default 30) to the `acp dispatch goose` subcommand in .claude/plugins/quacker-channel/src/cli.rs. Thread it into DispatchOptions (a new field) in acp_dispatch.rs and use it in run_verify in place of the hardcoded 30 passed to tail_lines. Update EVERY DispatchOptions construction site, including the ones in the #[cfg(test)] modules, so the crate compiles and all tests pass. Then run: git add -A && git commit -m "feat: configurable verify tail lines".