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 memi-design/design-skills --skill design-sandbox-proofgit clone --depth 1 https://github.com/memi-design/design-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/memi-design/design-skills/design-sandbox-proof)<a href="https://agentmods.dev/skills/memi-design/design-skills/design-sandbox-proof"><img src="https://agentmods.dev/badge/skills/memi-design/design-skills/design-sandbox-proof/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/memi-design/design-skills/design-sandbox-proof"><img src="https://agentmods.dev/badge/skills/memi-design/design-skills/design-sandbox-proof.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 | $0.00027 | $0.00350 |
| Opus 5 | $0.00014 | $0.00175 |
| Sonnet 5 | $0.00005 | $0.00070 |
| Haiku 4.5 | $0.00003 | $0.00035 |
Grade A, and why
design-sandbox-proof 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 11d 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.
What it actually says
Design Sandbox Proof
Deprecated compatibility slug. Use
memoire-design-toolingfor current setup and release-surface verification.
Use this Note when a user asks for a real repo that proves memi works with app code, MCP, Agent Skills, Tailwind, shadcn, UX audit, and interface craft.
Clone and verify
git clone https://github.com/sarveshsea/design-sandbox.git
cd design-sandbox
pnpm install
pnpm memi:agent
pnpm memi:diagnose
pnpm memi:ux
memi craft audit . --json
pnpm memi:tokens
pnpm verify
What to inspect
.agents/skills/memoire-design-tooling/SKILL.md.mcp.jsonmemoire.agent.yamlAGENTS.md- package scripts for memi proof commands
- UI routes that should remain Tailwind/shadcn compatible
Proof language
Use design-sandbox as the external "show me" surface:
design-sandbox is the public memi proof workspace: a small Next.js/Tailwind/shadcn repo wired with MCP, Agent Skills, memi diagnostics, UX audit, interface craft, tokens, and verification commands.
Sources
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.
- 11d ago First seen · 48 lines · 27 tokens per session scan A f3de3675a720
design-sandbox-proof is a skill published in the GitHub repository memi-design/design-skills (7 stars, last pushed 1mo ago), licensed MIT. It adds 27 tokens to every session and 350 once invoked, about $0.0001 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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