copywriting
Use when writing, rewriting or editing any text a user will read — interface strings, buttons, errors, empty states, landing and pricing pages, blog posts, changelogs, social posts, app store listings, ads, lifecycle email. Triggers - "write copy" / "напиши текст", "rewrite this" / "перепиши", "headline" / "заголовок", "CTA" / "кнопка", "post for X" / "пост в твиттер", "store listing" / "описание в сторе", "this sounds like AI" / "звучит как нейросеть", "microcopy" / "микрокопия", "error text" / "текст ошибки", "build a landing page" / "сделай лендинг" (the copy for it; the visual layer is sheleg-design's). For defining the voice itself, see brand-voice.
How do I install this agent skill?
npx skills add https://github.com/ssheleg/super-ux --skill copywritingIs this agent skill safe to install?
- Gen Agent Trust Hubwarn
The copywriting skill manages product and marketing text according to a brand identity pack. It includes a linter script and refers to a vendor-provided tool via npx. A readiness check for landing pages includes a shell script that fetches external URLs and executes dynamic Python code to analyze the results. This creates a surface for indirect prompt injection and involves dynamic code generation.
- Socketpass
No alerts
- Snykpass
Risk: LOW · No issues
What does this agent skill do?
copywriting — write it in the product's own voice
Part of super-ux — see system-map.md. After changes, resolve and run the brand linter as described below.
First action, every time: read the brand pack. docs/brand/voice.md,
terminology.md, and the channels.md record for the surface being written.
No pack? Stop and hand off to brand-voice. Do not improvise a voice.
Guessing it and being wrong costs more than the pause, and a product whose
copy was invented surface by surface is exactly the drift this layer exists
to remove.
The opt-out is spoken, never assumed: "no brand" / «без бренда» — or "draft it" / «черновиком» — is the operator declining this route: write directly and say the pack was skipped on request, never skip it silently.
Ownership is by FILE, not by directory. brand-voice owns the pack's
sources of truth — voice.md, the terminology dictionary, facts.md, the
channel playbooks and the locale policy — and this skill never writes those:
a term missing from the dictionary, or a number with no row in facts.md, is
reported, never invented to finish the sentence — adding it is
brand-voice's decision. This skill DOES own strings.md (the interface-
string registry, written with Status: proposed) and the product text itself.
Both live under docs/brand/, but the directory is not the owner — the file
is. Writing a strings.md row is this skill's job and needs no extra approval
for its LOCATION; a coordinated run claims the file before editing, and voice
and facts stay untouched in the same pass.
References
| Read | When |
|---|---|
| ui-copy.md | any string inside the product |
| marketing-copy.md | pages, long form, the seven sweeps, grounding |
| landing-pages.md | assembling a landing page: the offer, awareness, proof, the action |
| channel-playbooks.md | a social, blog, changelog, ads or email surface |
| store-copy.md | App Store or Google Play |
| seo-aeo-safety.md | anything a crawler or answer engine reads |
| ai-tells.md | every mode that produces text: the pass runs by default |
| localization.md | any locale that is not primary |
| surface-registers.md | the register for a surface |
Modes
The humanization pass runs by default, in every mode that produces text. It is not a mode you enter, it is the last step of Write, Edit and Adapt, under the guards in ai-tells.md which are not optional. The reason it is a default rather than an option: a draft nobody swept carries the markers that file grades, and a reader registers them before they can name why.
voice.md records the state in two fields that answer different questions.
Humanization: on | off is whether the pass runs, and it defaults to on
when the field is absent. Humanization pass: names which implementation
runs, and absent it is own, the only one that reads this pack's registers and
canonical facts. Turning it off is a legitimate decision that outlives whoever
made it, so off carries a Humanization declined: line with the reason and
the date. B064 checks all three states.
Every delivery of copy states what happened, in one line, before the copy or immediately after it:
Humanization: on — own pass, 7 markers at 2 densities, 4 addressed, 11% changed
Humanization: off — declined 2026-08-30, wording fixed by counsel
The line is not decoration. A pass that runs invisibly is indistinguishable from one that did not run, and the reader of the copy is usually not the person who chose the setting.
Write
- Name the surface. It must exist in
channels.md; if it does not, that is abrand-voicedecision, not an improvisation here. - Apply the register: the axes from
voice.md, plus that surface's deltas. Deltas move axes; they never cross the invariants. - Write. Every claim traces to
facts.md. Every product term comes fromterminology.md. - Deliver the copy first, then the reasoning. For headlines and CTAs give two or three options with what each trades away.
- For interface strings, add or update the
strings.mdrow — key,file:line, scenario,Status: proposed. - Run the humanization pass under the Humanize guards below, then print the status line. On new text the change rate is measured against the draft you just wrote, so the 50% ceiling does not apply the way it does to an edit; report the rate regardless.
Edit
The seven sweeps from marketing-copy.md, in order, looping back after each:
clarity, voice and tone, so-what, prove-it, specificity, emotion, zero risk.
Deliver sweep by sweep, prioritised by impact, not by reading order.
The humanization pass runs last, after the seven, and then the status line. Last because the sweeps rewrite whole sentences and a humanization pass run before them is measured against text that no longer exists; and because the semantic-preservation checklist is cheapest to apply to a version nobody is about to rewrite again.
Adapt
One piece across several surfaces. Re-write per surface — never paste one register into another. What survives adaptation is the claim and the proof; what changes is length, structure, CTA policy and register.
State plainly what each version drops. A thread is not a page with line breaks.
The pass runs per surface, not once on the source. Each version is different text in a different register, and a marker density that is fine in a blog post is not fine in a landing hero. One status line per surface.
Humanize
The standalone mode, for auditing text that already exists without writing any: an inherited page, a competitor's copy, a draft somebody else wrote. The same guards govern the pass wherever it runs, and they are not optional:
- Above ~10 markers per 500 words, say so and rewrite from the argument — a patch produces the same patterns with better words.
- Above a 50% change rate, do not ship. Report the rate and ask. That is no longer an edit.
- Run the semantic-preservation checklist before output: numbers, dates and proper nouns intact; causal direction unchanged; no negation inverted; quotations untouched; the core claim the same.
- Text that already reads naturally is left alone. Editing what is fine to prove the pass ran is this mode's failure.
- A marker count is not a verdict and never gates anything. Say which markers
are present at what density; never say a text was AI-written. A number of
markers does not prove authorship — the false positives fall hardest on people
writing in a second language, and a writer is not a defect to be edited into
fluency they did not ask for. The humanization pass is ADVISORY throughout:
B060warns, it does not error.ai-tells.mdcarries the measurement and what it binds. - A quote, a registered term, and an explicit
offnever force a rewrite. A marker inside a quotation is the source's word; a term interminology.mdis meant to recur; andHumanization: off(with its reason) preserves the text exactly. Brand bans are a separate user policy — a forbidden word is the brand's own choice interminology.md, not a machine-drafting tell, and it is that check's business, not this pass's. - Read
voice.md's two fields first.Humanization:is whether the pass runs and defaults toon;Humanization pass:names which implementation, and absent it isown. Neither absence stops work: run the default, print the status line saying it was a default, and offer to record it once. A value naming a tool that is not installed falls back toownand says so — a missing optional tool must not stop copy being written. - Other implementations exist and two are worth knowing —
npx sshlg-skills humanizerslists what this machine has. Reach for one for an audit with no rewrite, for long-form prose, or when the writer has a sample of their own writing to match. Stay here for product copy: the brand pack's registers and canonical facts are the constraint, and a general-purpose humanizer does not read them.
Non-negotiables
-
No decorative full stop in headings or labels, including nested HTML, formatted Markdown and staccato fragments such as “Your agents. Your tools.” Read the rendered role, not merely a flat copy export. Keep real questions, ellipses, abbreviations, versions, URLs and normal paragraph punctuation. A project may extend this rule to hero summaries and captions; record that scope in its brand policy and test the generated page too. When restoring historical copy, reapply the current project punctuation policy; an old exact-text snapshot is not an intentional exception.
-
No fabricated facts, statistics, quotes or experts. Not for a deadline, not for a benchmark, not because a placeholder would look better. Refuse, say why, offer to find a real one.
-
No humor on
error,destructive confirm,billing and receiptsorpaywall and upgrade— in any pack. The user is losing something there. -
One action, one name. Before naming an action, search
strings.mdfor it. A second name for an existing action is a defect, not a synonym. -
Never quote a number that is not in
facts.md.
Definition of done
- Every string or section traces to a surface record and a voice.
- The humanization status line is printed, whichever state it reports.
- New interface strings are in
strings.mdwith location and scenario. - Resolve the linter before running it: use
docs/brand/lint.pyif present; otherwise locate the installed super-ux linterbrand_lint.pyin its scripts directory and pass the project'sdocs/brandpath. Do not invent a project-local script or assume the shell exports a plugin-root variable. If neither exists, name the missing tool and the manual coverage; never call it a lint pass. - Confirm
Sources:resolves to the touched surfaces. HTML heading roles must survive a copy projection; flat paragraphs do not prove heading coverage. Run the resolved script with--fail-on B063when title punctuation is a required gate (or--strictfor all warnings). An older script that rejects the flag needs an update, not a retry that quietly drops the gate. - Report scanned surfaces, remaining warnings and the exact command/exit code. Exit zero with advisory warnings is not a clean review. Inspect the rendered copy and generators; a source-only check cannot see external CSS or runtime text.
- Anything reported as missing — a term, a fact, a surface — is named explicitly, not worked around.
What else is in references/. This skill names 10 contract(s) directly; references/ holds 12, because a contract this skill names links others and the whole closure ships inside the skill — the skills CLI installs one directory and a sibling's file would arrive dangling. Open the ones named here; the rest are reached from them, by name, when a contract sends you.
How can the creator link this skill?
Add the canonical catalog link to the repository README so users can inspect current installs and available audits. The publishing guide covers the complete discovery path.
<a href="https://skillzs.dev/skills/ssheleg/super-ux/copywriting">View copywriting on skillZs</a>