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.
git clone --depth 1 https://github.com/Yesterday-AI/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/plugins/yesterday-ai/skills/yesterday-pages)<a href="https://agentmods.dev/plugins/yesterday-ai/skills/yesterday-pages"><img src="https://agentmods.dev/badge/plugins/yesterday-ai/skills/yesterday-pages/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/plugins/yesterday-ai/skills/yesterday-pages"><img src="https://agentmods.dev/badge/plugins/yesterday-ai/skills/yesterday-pages.svg" alt="Reviewed on agentmods" width="80" height="20"></a>Grade A, and why
yesterday-pages 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 6d 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
{
"name": "yesterday-pages",
"description": "Use when Markdown, research, concepts, analyses, offers, image folders, or mechanisms need to become a branded Yesterday HTML page, visual report, whitepaper, visual story, data narrative, interactive explainer, or lightweight prototype.",
"author": {
"name": "Yesterday"
},
"homepage": "https://github.com/Yesterday-AI/skills/tree/main/.compiled/skill-plugins/yesterday-pages",
"repository": "https://github.com/Yesterday-AI/skills",
"license": "MIT",
"keywords": [
"skills",
"yesterday-pages"
]
}
What it installs
The manifest is a name and a version. 1 skill travel with it, and installing the plugin installs all of them — 50 tokens a session between them. Each is measured on its own page, and each can be installed alone.
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.
- 6d ago First seen · 15 lines scan A ed677a9e881b
yesterday-pages is a plugin published in the GitHub repository Yesterday-AI/skills (2 stars, last pushed 6d ago), licensed MIT. Its token cost is not measured: this kind of file is read by the harness, not the model. 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 2026-10-14.
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