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 agentmods add skills/educlopez/ui-craft/briefnpx skills add educlopez/ui-craft --skill briefgit clone --depth 1 https://github.com/educlopez/ui-craftWrote 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/educlopez/ui-craft/brief)<a href="https://agentmods.dev/skills/educlopez/ui-craft/brief"><img src="https://agentmods.dev/badge/skills/educlopez/ui-craft/brief.svg" alt="Measured on agentmods" 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 | $0.00043 | $0.01036 |
| Opus 5 | $0.00022 | $0.00518 |
| Sonnet 5 | $0.00009 | $0.00207 |
| Haiku 4.5 | $0.00004 | $0.00104 |
Grade A, and why
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 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.
How it starts
The opening of the file, as written. The whole thing — 66 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Context: this sub-skill is one lens of the broader ui-craft skill. If the ui-craft skill is also installed, read its SKILL.md first for Discovery + Anti-Slop + Craft Test, then apply the specific lens below.
Load references/brief.md for the brief format before proceeding.
Step 1: Detect existing brief
Check whether .ui-craft/brief.md exists. Use Read or ls on .ui-craft/.
If it exists: load its contents. If $ARGUMENTS names a specific update ("update principles", "shift target user", "add out of scope"), focus the session there and skip unchanged sections. Otherwise summarize what's in the brief and ask: "What do you want to change?"
If it doesn't exist: proceed to Step 2. Also check the repo root for a DESIGN.md or design-tokens.json (an ecosystem convention some teams already maintain) — if present, read it and pre-fill the brief's answers from it instead of re-asking; note the source. The brief complements an existing design contract, never contradicts it.
Step 2: Draft a new brief (absent case)
Walk the user through the five required sections in a single pass. Ask ONE compact question per section. Do not open five separate prompts unless the user asks for depth.
Compact prompt template:
"To write your design brief I need five things — answer as tersely as you like, I'll fill in structure:
- Product purpose — what does it do, in one sentence?
- Primary user — who, by role and context?
- Principles — what does this product believe? Give me three to five stances it takes. (If you don't have these yet, say so — I'll run the principles workshop.)
- Success metric — what does 'the user succeeded on this surface' look like in observable behavior?
- Out of scope — three to five things this surface deliberately does NOT do."
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 First seen · 66 lines · 43 tokens per session scan A 874dcc6608be
brief is a skill published in the GitHub repository educlopez/ui-craft (310 stars, last pushed yesterday), licensed MIT. It adds 43 tokens to every session and 1,036 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 2026-08-30.
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