Reference: transform

Commands that rewrite existing text. All take text via pipe (preferred) or as a positional argument; all return plain text on stdout.

tr

Translate text to a target language.

tr <target> [--from <lang>] [--formal] [--casual] [...text]

Flag	Default	What
target (positional)	required	Target language — ISO code (da, en, fr) or name (dansk, engelsk)
--from	auto	Source language hint; auto-detected if omitted
--formal	off	Use formal register where the language has one (De-form, Sie-form, vous)
--casual	off	Use informal register (du-form, tu)
...text	—	Inline text (otherwise via pipe)

Example:

"Hello" | tr da
"Hej" | tr --formal en

Alias: ,t

rw

Rewrite per a freeform instruction. Preserves meaning and concrete facts.

rw <instruction> [...text]

Flag	Default	What
instruction (positional)	required	What to do — passed to the LLM as the rewrite rule
...text	—	Inline text (otherwise via pipe)

Example:

"long convoluted sentence" | rw "shorter and clearer"
open --raw draft.md | rw "more direct, active voice"

Alias: ,r

sum

Summarize text. Default is dense prose in the source language.

sum [--bullets] [--max <int>] [...text]

Flag	Default	What
-b, --bullets	off	Output as a bullet list instead of prose
-m, --max	model-decided	Cap on sentences (prose) or bullets
...text	—	Inline text (otherwise via pipe)

Example:

open --raw article.md | sum
open --raw article.md | sum --bullets --max 5

Alias: ,s

proof

Correct spelling, grammar and punctuation. Preserves voice and structure.

proof [--strict] [...text]

Flag	Default	What
-s, --strict	off	Also correct awkward phrasing and unclear constructions
...text	—	Inline text (otherwise via pipe)

Example:

"Jeg har set tre hunde igår" | proof
open --raw draft.md | proof | save -f draft.md

Alias: ,p

tone

Shift register/style without changing content.

tone <style> [...text]

Flag	Default	What
style (positional)	required	Style label or freeform description
...text	—	Inline text (otherwise via pipe)

Known styles: formal, casual, executive, friendly, neutral, direct, diplomatic. Any other value is passed verbatim to the model.

Example:

"we should meet at 2" | tone formal
"Dear Sir/Madam" | tone casual
"long technical explanation..." | tone executive

Alias: ,o

Behaviour shared by all commands

• Input: pipe (preferred) or positional args. Positional args are joined with spaces.
• Output: plain text on stdout. No quotes, code fences, preambles or trailing commentary. Trailing whitespace trimmed.
• Source language is preserved unless explicitly translating.
• Uses $env.COMMA_CFG for provider/model/tools — see configuration.