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 devinilabs/pro-skill --skill nested-container-framesgit clone --depth 1 https://github.com/devinilabs/pro-skillWrote 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/devinilabs/pro-skill/nested-container-frames)<a href="https://agentmods.dev/skills/devinilabs/pro-skill/nested-container-frames"><img src="https://agentmods.dev/badge/skills/devinilabs/pro-skill/nested-container-frames/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/devinilabs/pro-skill/nested-container-frames"><img src="https://agentmods.dev/badge/skills/devinilabs/pro-skill/nested-container-frames.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 | $0.00087 | $0.00242 |
| Opus 5 | $0.00044 | $0.00121 |
| Sonnet 5 | $0.00017 | $0.00048 |
| Haiku 4.5 | $0.00009 | $0.00024 |
Grade A, and why
nested-container-frames 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.
This is a copy
100% identical to nested-container-frames — 0 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
Nested Container Frames Skill
Use When
- A layout needs a container-in-container system with visible outer bounds, inset inner frames, and layered page structure.
Workflow
- Define an outer centered container that controls the global page width.
- Add visible vertical boundary lines and small corner markers to establish the frame.
- Place inner containers inset from the outer edges using consistent padding.
- Give each inner level its own background, border, radius, and spacing rhythm.
- Use the frame hierarchy to separate hero, feature, proof, and CTA modules without adding heavy cards.
Guardrails
- Do not nest cards inside cards until the layout feels boxed in.
- Do not let frame lines overpower content readability.
What ships with it
9 files 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.
- demo/assets/page-01-2f563338-39fa-47ea-9761-658d4f3f84db-1600w.jpg 292 KB
- demo/assets/page-02-4f5668c5-fc4a-44e0-bc5e-a664189d3c31-1600w.jpg 212 KB
- demo/assets/page-03-77415a2e-dcbc-4748-a29d-fced4821881a-1600w.jpg 354 KB
- demo/assets/page-04-c92852bb-a510-405a-85ab-ffa0fde136a4-1600w.jpg 209 KB
- demo/assets/source-preview.jpg 72 KB
- demo/index.html 21 KB
- demo/preview.jpg 54 KB
- demo/PROMPT.md 2.9 KB
- demo/source.json 3.2 KB
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 · 21 lines · 87 tokens per session scan A 02fde1df60f9
nested-container-frames is a skill published in the GitHub repository devinilabs/pro-skill (23 stars, last pushed 26d ago), licensed MIT. It adds 87 tokens to every session and 242 once invoked, about $0.0004 per session on Opus 5. A static security scan graded it A with 0 findings. It is 100% identical to nested-container-frames, differing in 0 lines, and is treated as a copy.
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