Use apple contacts --help and subcommand help as the first reference.
Common reads:
apple contacts search --query "Ada" --json
apple contacts read --id CONTACT_ID --json
apple contacts duplicates --field email --json
apple contacts groups list --jsonImport/export and contact mutations use the DryRun safety flow:
apple contacts export --ids CONTACT_ID --output contacts.vcf --dry-run --json
apple contacts create --given-name Ada --family-name Lovelace --dry-run --jsonThe detailed capability boundary lives in
../../Architecture/Contacts/CapabilityList.md.