A set of rules and documents that defines how a product speaks, including its tone, preferred terms, forbidden words, facts, writing styles for different surfaces, and languages.

Use it to define or update a tone of voice, document product terminology and facts, set language-specific rules, and inspect or validate existing brand text.

It prevents product text from sounding inconsistent or making up unsupported facts. It also provides a way to check whether the written identity stays aligned over time.

brand-voice — Skill for Claude Code by ssheleg

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent

npx skills add ssheleg/super-ux --skill brand-voice

Clone the repo

git clone --depth 1 https://github.com/ssheleg/super-ux

Made for: Claude Code.

Or install super-ux, the plugin that ships this one along with the rest of its 7 skills, 15 commands.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

README.md

[![agentmods](https://agentmods.dev/badge/skills/ssheleg/super-ux/brand-voice/github.svg)](https://agentmods.dev/skills/ssheleg/super-ux/brand-voice)

Your own site

<a href="https://agentmods.dev/skills/ssheleg/super-ux/brand-voice"><img src="https://agentmods.dev/badge/skills/ssheleg/super-ux/brand-voice/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

Your own site · 80×15

<a href="https://agentmods.dev/skills/ssheleg/super-ux/brand-voice"><img src="https://agentmods.dev/badge/skills/ssheleg/super-ux/brand-voice.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 149 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 1,604 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.

Origin original No closer match found in the catalogue.

Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

Model	Per session	Once invoked
Fable 5.1	$0.00149	$0.01604
Opus 5	$0.00075	$0.00802
Sonnet 5	$0.00030	$0.00321
Haiku 4.5	$0.00015	$0.00160

Measured 5d ago against content hash 5232e797d83c, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-11, from the pricing page.

Security

Grade A, and why

brand-voice scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 5d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

plugins/super-ux/skills/brand-voice/SKILL.md · 134 lines

How it starts

The opening of the file, as written. The whole thing — 134 lines — stays where its author put it; the contents beside it link to each section on GitHub.

brand-voice — define and hold the verbal identity

Part of super-ux — see system-map.md for the whole pipeline. After changes, run python3 docs/brand/lint.py.

docs/ux/ decides what the product does. This skill decides how it speaks, and owns docs/brand/ in the target project.

Format contract: brand-contract.md (brand-contract v1). Read it before writing or editing anything under docs/brand/. Never deviate from its file names, field names or statuses — the linter and the audit key off them.

The pack library: voice-packs.md — six archetypes, each with a declared failure mode. The register model: surface-registers.md. Locales: localization.md.

Invoked with no task → status, then one next action

Report the state: is a pack recorded, what voice.md says its Status is, how many facts carry ⚠ TBD or no source, locale parity, and the linter's error and warning counts.
Name every unresolved fact. Never invent one to close a gap — an unknown is reported, not filled.
Propose exactly one next action, usually the top open fact or the surface the user actually came for.

Where the voice comes from

The pack is derived from docs/ux/foundation.md — personas, jobs, and the deciding input: what the user loses when the product fails. A voice that charms when the stakes are a playlist is intolerable when the stakes are payroll.

The dependency runs one way. A persona never changes because a tone was appealing. With no foundation, work in degraded mode: stamp Derived-from: inferred, say plainly that the WHY layer should be built, and continue rather than blocking.

The route itself has a spoken opt-out: an operator saying "no brand" / «без бренда» declines it — proceed without the pack and say so, rather than dropping it silently.

Choosing a workflow

Read the full file on GitHub · 134 lines

Files

What ships with it

17 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

5d ago Changed · +4 lines 5232e797d83c
11d ago First seen · 130 lines · 149 tokens per session scan A 4bcc16181736

Subscribe to this mod's changes

brand-voice is a skill published in the GitHub repository ssheleg/super-ux (3 stars, last pushed yesterday), licensed MIT. It adds 149 tokens to every session and 1,604 once invoked, about $0.0007 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

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