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yesterday-public-plugins marketplace

yesterday-public-plugins marketplace is a plugin for Claude Code from Yesterday-AI/skills. Its token cost is not measured, scanned A, original, MIT.

A compiled marketplace entry called skills. The available details do not explain which skills it contains or how they work.

In plain words
What is it for?
Its concrete jobs are not stated in the available details.
Why use it?
Without that information, it is not possible to say what development problem it removes.

Plugin for Claude Code

Written for Claude Code: SessionStart hook event. Also seen: mentions Claude Code; mentions Codex; built for gstack.

not rated 2repo changed 1mo ago A scan tokens not measured original MIT

Good fit Its concrete jobs are not stated in the available details.

Compare 6 plugins from other repositories ↓
Install in Claude Code
/plugin marketplace add Yesterday-AI/skills
/plugin install yesterday-public-plugins marketplace
View source ↗ Yesterday-AI/skills
Install

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.

Clone the repo
git clone --depth 1 https://github.com/Yesterday-AI/skills

Made for: Claude Code.

Wrote 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.

agentmods badge for yesterday-public-plugins marketplace

README.md
[![agentmods](https://agentmods.dev/badge/plugins/yesterday-ai/skills/marketplace/github.svg)](https://agentmods.dev/plugins/yesterday-ai/skills/marketplace)
Your own site
<a href="https://agentmods.dev/plugins/yesterday-ai/skills/marketplace"><img src="https://agentmods.dev/badge/plugins/yesterday-ai/skills/marketplace/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.

agentmods 80×15 button for yesterday-public-plugins marketplace

Your own site · 80×15
<a href="https://agentmods.dev/plugins/yesterday-ai/skills/marketplace"><img src="https://agentmods.dev/badge/plugins/yesterday-ai/skills/marketplace.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session not measured What this adds to a session before it is invoked.
When invoked not measured Not applicable: nothing here is loaded into a session.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Security

Grade A, and why

yesterday-public-plugins marketplace 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 1mo 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.

.claude-plugin/marketplace.json · 350 lines

How it starts

The opening of the file, as written. The whole thing — 350 lines — stays where its author put it; the contents beside it link to each section on GitHub.

{
  "name": "yesterday-public-plugins",
  "description": "Yesterday's PUBLIC plugin catalog.",
  "owner": {
    "name": "Yesterday"
  },
  "allowCrossMarketplaceDependenciesOn": [
    "claude-plugins-official"
  ],
  "renames": {
    "webflow": null,
    "paperclip-api": null,
    "para-memory-files": null
  },
  "plugins": [
    {
      "name": "ytstack",
      "description": "BUNDLE: Yesterday Technologies Stack -- opinionated software-development OS for AI agents. Curated superpowers + gstack skills plus Project-OS artifact discipline (PROJECT.md, DECISIONS.md, KNOWLEDGE.md, milestone/slice/task hierarchy), orchestrated via SessionStart hooks.",
      "source": {
        "source": "github",
        "repo": "Yesterday-AI/ytstack"
      },
      "author": {
        "name": "Yesterday"
      },
      "homepage": "https://github.com/Yesterday-AI/ytstack",
      "repository": "https://github.com/Yesterday-AI/ytstack",
      "license": "MIT",
      "keywords": [
        "claude-code",
        "agentic",
        "development-methodology",
        "project-management",
        "artifact-discipline",
        "yesterday"
      ]
    },
    {
      "name": "office",
      "description": "BUNDLE: Daily-work core tier. Generic productivity, creative, and knowledge skills for daily work; nothing requires external SaaS keys at install time. Optional SaaS integrations (Figma, Miro, Voxtral TTS, VRR transit) live in office-extras.",
      "source": "./plugins/office",
      "author": {
        "name": "Yesterday"
      },
      "keywords": [
        "claude-code",
        "yesterday",
        "productivity",
        "daily-work",
        "knowledge-management",
        "creative"
      ]
    },
    {
      "name": "office-extras",
      "description": "BUNDLE: Daily-work extras tier. Optional integrations needing external SaaS accounts/keys (Figma, Miro, Voxtral TTS, VRR transit). Install alongside office when you actually use these services.",
      "source": "./plugins/office-e

Read the full file on GitHub · 350 lines

Contents

The plugins it lists here

This marketplace lists 19 plugins kept in the same repository. Each has its own page, its own measurements and its own install command.

Changes

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.

  1. 1mo ago Changed · +46 lines 9df1c1a93552
  2. 1mo ago Changed · -16 lines 3c1d4764e4f2
  3. 2mo ago Changed · +319 lines cf97e01ba748
  4. 2mo ago First seen · 1 lines scan A 8956184205a3

Subscribe to this mod's changes

yesterday-public-plugins marketplace is a plugin published in the GitHub repository Yesterday-AI/skills (2 stars, last pushed 1mo 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 2026-08-31.

Claude Codeagent-skillsai-agentsclaude-code-pluginscursorcursor-plugins
Related

yesterday-public-plugins marketplace compared with plugins from other repositories

yesterday-public-plugins marketplace next to 6 plugins from other repositories
ModTypeStarsLast pushLicenceScanTokensWorks with
yesterday-public-plugins marketplaceYesterday-AI/skillsPlugin21mo agoMITA—Claude Code
before-you-buildwshobson/agentsPlugin42k4d agoMITA—Claude Code
handbook-agent-spec-kitNikiforovAll/claude-code-rulesPlugin14211d agoApache-2.0A—Claude Code
mc-agent-toolkitmonte-carlo-data/mc-agent-toolkitPlugin93yesterdayApache-2.0A—Cursor
pedantic-coderoborchers/fractional-ctoPlugin3719d agoMITA—Claude Code
python-packageoborchers/fractional-ctoPlugin3719d agoMITA—Claude Code
mosaic-bridgeMosaicXR-AI/mosaic-bridgePlugin11todaynoneA—Claude Code