fef09d4a47
`aura run` keyed only on the first token being `run`, so `aura run extra-garbage` printed the full report and exited 0 -- a typo'd `aura run --sweep` silently ran instead of hinting. #16 ratified the strict reading over the lenient one (the lenient reading buys no real forward-compat: future args would be parsed explicitly anyway, while the silent-swallow actively hides typos and clashes with the exit-2 hygiene the unknown-subcommand path already enforces). Add a match guard so only a bare `run` reaches the JSON happy path: Some("run") if args.next().is_none() => println!(...) A trailing token fails the guard and falls through to the existing `_ =>` usage-error arm (stderr usage, exit 2) -- no literal duplication, the error path is reused. Bare `aura run` is unchanged, pinned by the positive-preservation assertion and the two sibling run-tests. Verified: cargo test -p aura-cli green (6), clippy --all-targets -D warnings clean. closes #16