In the file .claude/plugins/quacker-channel/src/acp_dispatch.rs there is a function `fn tail_lines(text: &str, n: usize) -> String`. Rename its parameter `n` to `max_lines`, updating every use of that parameter inside the function body. Do not change behavior or any other function. Then run: git add -A && git commit -m "refactor: rename tail_lines param".