```trycmd
$ run.sh things3 --today-ts 1699920000 --now-ts 1700000111.0 edit A7h5eCi24RvAWKC3Hv3muf --add-checklist 'Step three'
✓ Edited Task with checklist A7h5eCi24RvAWKC3Hv3muf (add-checklist)
{
"ancestor_index": 0,
"changes": {
"[..]": {
"e": "ChecklistItem3",
"p": {
"cd": 1700000111.0,
"ix": 2,
"md": 1700000111.0,
"ss": 0,
"ts": [
"A7h5eCi24RvAWKC3Hv3muf"
],
"tt": "Step three"
},
"t": 0
}
}
}
```