```trycmd
$ run.sh things3 --today-ts 1699920000 --now-ts 1700000111.0 edit A7h5eCi24RvAWKC3Hv3muf --rename-checklist 'MpkEei:Renamed step'
✓ Edited Task with checklist A7h5eCi24RvAWKC3Hv3muf (rename-checklist)
{
"ancestor_index": 0,
"changes": {
"MpkEei6ybkFS2n6SXvwfLf": {
"e": "ChecklistItem3",
"p": {
"md": 1700000111.0,
"tt": "Renamed step"
},
"t": 1
}
}
}
```