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3 changes: 2 additions & 1 deletion docs/user/guide.md
Original file line number Diff line number Diff line change
Expand Up @@ -114,7 +114,8 @@ Choose one command:
copies, but any copy can recover the seed.
- **Custom:** thresholds 4 through 9 require `--shares` or `--indices`. For
example, `ms32 create 4cash --shares 7` produces seven `cash` shares; any
four recover the seed.
four recover the seed. The identifier tells backups apart, so choose one
that no other backup you keep uses.

More required shares make theft harder; fewer required shares make recovery
easier.
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2 changes: 1 addition & 1 deletion src/codex32/_cli_parser.py
Original file line number Diff line number Diff line change
Expand Up @@ -160,7 +160,7 @@ def parser(prog: str = "codex32", *, master_seed: bool = False) -> argparse.Argu
"header",
nargs="?",
metavar="HEADER",
help="backup header or sharing threshold, such as 3cash or 3; omit for a single recovery card",
help="sharing threshold, such as 3, or threshold and identifier, such as 3cash, using an identifier no other backup you keep uses; omit for a single recovery card",
)
create.add_argument(
"--bytes",
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