skills

A collection of writing skills for quoting sources, documenting evidence, running surveys, and describing research papers.

In plain words
What is it for?
Use it to prepare sourced Markdown documents, format quotations, conduct surveys, and record paper details.
Why use it?
It provides shared rules for citations, quotations, translations, and source lists, reducing inconsistent or unsupported writing.

Plugin for Claude Code

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.

Claude Code
/plugin marketplace add mathbullet/skills
agentmods
npx agentmods add plugins/mathbullet/skills/marketplace
Clone the repo
git clone --depth 1 https://github.com/mathbullet/skills

Made for: Claude Code.

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. Scan, not verified.
Origin original No closer match found in the catalogue.
Security

Grade A, and why

skills 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 2d 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 · 82 lines

How it starts

The opening of the file, as written. The whole thing — 82 lines — stays where its author put it; the contents beside it link to each section on GitHub.

{
  "name": "skills",
  "owner": {
    "name": "mathbullet"
  },
  "metadata": {
    "description": "Claude Code skills by mathbullet"
  },
  "plugins": [
    {
      "name": "writing-quotation",
      "source": "./plugins/writing-quotation",
      "description": "Formatting rules for quoting external sources inside a Markdown document. Quotations always live in code blocks (never `>`), original and translation sit together, the source reference goes on the line after the fence, and bare numeric references are forbidden.",
      "version": "1.0.0",
      "author": {
        "name": "mathbullet"
      },
      "license": "MIT"
    },
    {
      "name": "documenting-with-sources",
      "source": "./plugins/documenting-with-sources",
      "description": "Common conventions for writing Markdown documents that cite outside sources. Defines mandatory citations, in-text reference format, separation of quotation from prose, the ban on fabricated associations, and the source-list format. Used by survey, paper-details, and other sourced-writing skills.",
      "version": "1.0.0",
      "author": {
        "name": "mathbullet"
      },
      "license": "MIT"
    },
    {
      "name": "survey",
      "source": "./plugins/survey",
      "description": "Multi-source investigation skill that collects papers, articles, social-media posts, and industry signals on a topic into an indexed Markdown report. Includes sub-agent parallelism, Assertion-Evidence prose ordering, table-of-contents requirements, and an output convention. Depends on documenting-with-sources and writing-quotation.",
      "version": "1.0.0",
      "author": {
        "name": "mathbullet"
      },
      "license": "MIT"
    },
    {
      "name": "paper-details",
      "source": "./plugins/paper-details",
      "description": "Produce a faithful detailed explainer of an academic paper as a Markdown document. Section structure mirrors the paper, equations render as LaTeX with explicit variable definitions, cita

Read the full file on GitHub · 82 lines

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. 2d ago First seen · 82 lines scan A 4971e94b6757

Subscribe to this mod's changes

skills is a plugin published in the GitHub repository mathbullet/skills (114 stars, last pushed 4d 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 2026-08-30.

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