```trycmd
$ run.sh things find --deadline 'bad-expr'
? 1
Invalid --deadline expression: bad-expr (expected >, <, >=, <= or = before the day, such as <=2026-03-31)

```

```trycmd
$ run.sh things find --deadline '<=2026-13-01'
? 1
Invalid --deadline date: 2026-13-01 (expected YYYY-MM-DD, today, tomorrow or yesterday)

```