System Prompts Leaks is a collection of captured system instructions used to guide AI chatbots and coding agents before they receive user messages. It serves researchers and developers studying how different AI assistants are directed.
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 asgeirtj/system_prompts_leaks --skill hi-fi-designgit clone --depth 1 https://github.com/asgeirtj/system_prompts_leaksWrote 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/asgeirtj/system_prompts_leaks/hi-fi-design)<a href="https://agentmods.dev/skills/asgeirtj/system_prompts_leaks/hi-fi-design"><img src="https://agentmods.dev/badge/skills/asgeirtj/system_prompts_leaks/hi-fi-design/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/asgeirtj/system_prompts_leaks/hi-fi-design"><img src="https://agentmods.dev/badge/skills/asgeirtj/system_prompts_leaks/hi-fi-design.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- Snyk pass
- NVIDIA SkillSpector pass
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 | $0.01745 |
| Opus 5 | $0.00014 | $0.00873 |
| Sonnet 5 | $0.00005 | $0.00349 |
| Haiku 4.5 | $0.00003 | $0.00175 |
Grade A, and why
hi-fi-design 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 13d 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.
Copies of this mod
1 near-identical copy found in the catalogue:
- hi-fi-design — 92% identical, 18 lines differ
How it starts
The opening of the file, as written. The whole thing — 57 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Hi-fi design
Create a high-fidelity, polished design.
Follow this general design process (use the todo list to remember): (1) ask questions, (2) find existing UI kits and collect design context — copy ALL relevant components and read ALL relevant examples; ask the user if you can't find them, (3) start your file with assumptions + context + design reasoning (as if you are a junior designer and the user is your manager), with placeholders for the designs, and show it to the user early, (4) build out the designs and show the user again ASAP; append some next steps, (5) use your tools to check, verify and iterate on the design.
Good hi-fi designs do not start from scratch — they are rooted in existing design context. Ask the user to Import their codebase, or find a suitable UI kit / design resources, or ask for screenshots of existing UI. You MUST spend time trying to acquire design context, including components. If you cannot find them, ask the user for them. In the Import menu, they can link a local codebase, provide screenshots or Figma links; they can also link another project. Mocking a full product from scratch is a LAST RESORT and will lead to poor design. If stuck, try listing design assets and ls'ing design system files — be proactive! Some designs may need multiple design systems — get them all. Use the starter components (device frames and the like) to get high-quality scaffolding for free.
When showing multiple design options on one page, decide between (a) a single full-size responsive prototype with a tweaks panel, or (b) a vertical stack of anchored option cards. Choose based on how design-y vs prototype-y the ask is, how many options there are, and how big each is. For (b):
Present multiple design options as a vertical stack of turns — each turn of options is its own <section>, newest turn at the top, and every option gets a stable {turn}{letter} id (1a, 1b, 2a…) that the user references back in chat and you cross-link between turns. Always include <meta name="design_doc_mode" content="canvas"> in <helmet> — the host provides pan/zoom, so the user can freely zoom out on designs wider than the viewport.
How to write it — put one <style> block in <helmet>, then one <section class="dv-turn"> per turn as a direct child of the root (right after </helmet>, no wrapper). When the user asks for another round, insert the new section ABOVE the existing ones so the latest work sits at the top; never reorder, renumber, or delete earlier turns.
<helmet data-dc-atomics><meta name="design_doc_mode" content="canvas"><style>
body{margin:0;background:#f0eee9;font-family:system-ui,sans-serif}
.dv-turn{padding:40px 44px 32px;border-bottom:1px solid rgba(0,0,0,.08);scroll-margin-top:16px}
.dv-thd{display:flex;align-items:baseline;gap:10px;margin:0 0 20px}
.dv-tid{font:600 10px ui-monospace,Menlo,monospace;padding:3px 7px;background:#1a1a1a;color:#fff;border-radius:4px;text-decoration:none}
.dv-tname{font:600 13px/1.2 system-ui,sans-serif;color:#1a1a1a}
.dv-opts{display:flex;flex-wrap:wrap;gap:28px;align-items:flex-start}
.dv-opt{flex:none;display:flex;flex-direction:column;gap:9px;scroll-margin-top:16px}
.dv-oid{font:600 10.5px ui-monospace,Menlo,monospace;padding:3px 7px;background:rgba(0,0,0,.08);color:#1a1a1a;border-radius:5px;text-decoration:none}
.dv-olabel{display:flex;align-items:baseline;gap:8px;font:400 11px/1.3 system-ui,sans-serif;color:rgba(0,0,0,.55)}
.dv-card{max-width:100%;background:#fff;border:1px solid rgba(0,0,0,.08);border-radius:8px;box-shadow:0 1px 3px rgba(0,0,0,.06);overflow:hidden}
.dv-opt:target .dv-oid{background:#2a78d6;color:#fff}
.dv-next{margin:22px 0 0;font:12px/1.5 system-ui,sans-serif;color:rgba(0,0,0,.5)}
</style></helmet>
<section class="dv-turn" id="t2">
<div class="dv-thd"><a class="dv-tid" href="#t2">2</a><span class="dv-tname">Riffs on <a class="dv-oid" href="#1b">1b</a></span></div>
<div class="dv-opts">
<div class="dv-opt" id="2a"><div class="dv-olabel"><a class="dv-oid" href="#2a">2a</a>Tighter spacing</div><div class="dv-card" style="width:360px">…design…</div></div>
<div class="dv-opt" id="2b">…</div>
</div>
<p class="dv-next">Try next: "more like <a class="dv-oid" href="#2a">2a</a> but with the serif from <a class="dv-oid" href="#1c">1c</a>" · "make <a class="dv-oid" href="#2b">2b</a> full-bleed" · "new directions"</p>
</section>
<section class="dv-turn" id="t1">…turn 1, unchanged…</section>
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.
- 13d ago First seen · 57 lines · 27 tokens per session scan A cbc66c2deb7c
hi-fi-design is a skill published in the GitHub repository asgeirtj/system_prompts_leaks (64,893 stars, last pushed 2d ago), licensed CC0-1.0. It adds 27 tokens to every session and 1,745 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 2026-08-30.
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