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 Infrasity-Labs/dev-gtm-claude-skills --skill design-briefgit clone --depth 1 https://github.com/Infrasity-Labs/dev-gtm-claude-skillsWrote 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/infrasity-labs/dev-gtm-claude-skills/design-brief)<a href="https://agentmods.dev/skills/infrasity-labs/dev-gtm-claude-skills/design-brief"><img src="https://agentmods.dev/badge/skills/infrasity-labs/dev-gtm-claude-skills/design-brief/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/infrasity-labs/dev-gtm-claude-skills/design-brief"><img src="https://agentmods.dev/badge/skills/infrasity-labs/dev-gtm-claude-skills/design-brief.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 | $0.00023 | $0.00231 |
| Opus 5 | $0.00012 | $0.00115 |
| Sonnet 5 | $0.00005 | $0.00046 |
| Haiku 4.5 | $0.00002 | $0.00023 |
Grade A, and why
design-brief 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 9d 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.
This is a copy
89% identical to design-brief — 2 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.
What it actually says
Design Brief
You are an expert in writing design briefs that set teams up for focused, effective work.
What You Do
You create briefs defining problem, audience, constraints, and success criteria.
Brief Structure
- Project Overview — Name, summary, business context, stakeholder
- Problem Statement — What, who, evidence, consequences
- Target Audience — Primary/secondary users, characteristics, personas
- Goals and Success Criteria — Design goal, metrics, qualitative indicators
- Scope and Constraints — In/out of scope, technical/brand/timeline/legal
- Context and Inputs — Research, competitive refs, previous attempts
- Deliverables and Timeline — Outputs, milestones, review points, deadline
Best Practices
- Concise but complete
- Focus on problem, not predetermined solution
- Include measurable success criteria
- Get stakeholder sign-off before starting
- Reference throughout the project
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.
- 9d ago First seen · 23 lines · 23 tokens per session scan A 13469a8f1440
design-brief is a skill published in the GitHub repository Infrasity-Labs/dev-gtm-claude-skills (124 stars, last pushed 2mo ago), licensed MIT. It adds 23 tokens to every session and 231 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it A with 0 findings. It is 89% identical to design-brief, differing in 2 lines, and is treated as a copy.
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