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.
npx skills add Andytoizer/gtm-brain-builder --skill brand-voice-agentgit clone --depth 1 https://github.com/Andytoizer/gtm-brain-builderWrote 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.
[](https://agentmods.dev/skills/andytoizer/gtm-brain-builder/brand-voice-agent)<a href="https://agentmods.dev/skills/andytoizer/gtm-brain-builder/brand-voice-agent"><img src="https://agentmods.dev/badge/skills/andytoizer/gtm-brain-builder/brand-voice-agent/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.
<a href="https://agentmods.dev/skills/andytoizer/gtm-brain-builder/brand-voice-agent"><img src="https://agentmods.dev/badge/skills/andytoizer/gtm-brain-builder/brand-voice-agent.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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 | $0.00032 | $0.00518 |
| Opus 5 | $0.00016 | $0.00259 |
| Sonnet 5 | $0.00006 | $0.00104 |
| Haiku 4.5 | $0.00003 | $0.00052 |
Grade A, and why
brand-voice-agent 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 10d 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.
How it starts
The opening of the file, as written. The whole thing — 44 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Brand Voice Agent
Owns brand/ and tone files under company/ when present.
Inputs
- Brand system, website, design files, lifecycle messages, and approved public copy.
- Claude.ai/design projects or exports when the operator is using it to create or refine a brand kit.
- Person-specific writing/speaking samples for each speaker profile.
- Operator/accountable-owner taste review.
Outputs
brand/brandkit.mdbrand/design-resources.mdbrand/voice-system.mdbrand/speaker-tone-{person}.mdcompany/tone-of-voice.md
Claude.ai/Design Workflow
Use Claude.ai/design when the operator wants help turning GTM Brain context into a practical brand kit.
- Read the smallest useful source set: product truth, approved claims, ICP, messaging, proof approvals, voice system, and existing visual assets.
- Draft a Claude.ai/design prompt that includes audience, category, desired perception, tone boundaries, visual references, proof constraints, and do-not-claim rules.
- Tell the operator to open
https://claude.ai/design, create a brand-kit or design-system project, paste the prompt, and upload approved visual assets. - Ask Claude.ai/design for logo usage, color palette with hex values, typography recommendations, layout rules, image style, component examples, slide/social examples, and do/don't examples.
- Bring the output back into the GTM Brain only after review: approved choices go in
brand/brandkit.md, project links and exports go inbrand/design-resources.md, and voice implications go inbrand/voice-system.md.
Rules
- Tone is separate from sales copy.
- Speaker tone comes from that speaker's own samples.
- Sales calls and campaign tools inform buyer language, objections, proof, and message performance, not the speaker's voice by themselves.
- Claude.ai/design output is a visual draft until an accountable owner approves it.
- Do not let Claude.ai/design invent positioning, customer proof, or product claims that are not already supported by the brain.
- Use
$design-system-agentwhen the user needs a structured design brief, Claude.ai/design walkthrough, Codex implementation/import instructions, or design-system token/component guidance. - Ask Grill-me before durable taste or tone decisions.
What ships with it
1 file 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.
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.
- 10d ago First seen · 44 lines · 32 tokens per session scan A ed951ca05ca3
brand-voice-agent is a skill published in the GitHub repository Andytoizer/gtm-brain-builder (8 stars, last pushed 4mo ago), licensed MIT. It adds 32 tokens to every session and 518 once invoked, about $0.0002 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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