skillkit-marketplace

A toolkit for creating skills and subagents, which are reusable instructions or specialised helpers for a coding agent. It uses test-driven development, or TDD, where expected behaviour is defined and checked with tests during development.

In plain words
What is it for?
Use it to create skills and subagents, choose a shorter or fuller workflow, run behavioural pressure tests, and apply quality checks before delivery.
Why use it?
It provides a structured way to check whether a new skill behaves correctly, including under difficult or misleading inputs.

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 rfxlamia/skillkit
agentmods
npx agentmods add plugins/rfxlamia/skillkit/marketplace
Clone the repo
git clone --depth 1 https://github.com/rfxlamia/skillkit

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

skillkit-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 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 · 256 lines

How it starts

The opening of the file, as written. The whole thing — 256 lines — stays where its author put it; the contents beside it link to each section on GitHub.

{
  "$schema": "https://anthropic.com/claude-code/marketplace.schema.json",
  "name": "skillkit-marketplace",
  "description": "Professional skill creation with TDD workflow and behavioral validation. Includes dual-mode (fast/full), pressure testing, and quality gates.",
  "owner": {
    "name": "rfxlamia",
    "email": "[email protected]"
  },
  "metadata": {
    "version": "2.1.6",
    "description": "Professional skill and subagent creation toolkit with dual-mode workflow (fast/full), behavioral validation, and quality gates for 9.0/10+ scores."
  },
  "plugins": [
    {
      "name": "skillkit-core",
      "description": "Professional skill and subagent creation with dual-mode workflow: 12-step fast mode and 15-step full mode with behavioral pressure testing and TDD integration.",
      "source": "./skills/skillkit",
      "version": "2.1.6",
      "author": {
        "name": "rfxlamia"
      },
      "homepage": "https://github.com/rfxlamia/skillkit",
      "repository": "https://github.com/rfxlamia/skillkit",
      "license": "Apache-2.0",
      "keywords": [
        "skill-creator",
        "subagent-creator",
        "skillkit",
        "validation",
        "automation",
        "quality-assurance",
        "research-driven",
        "anti-hallucination",
        "testing",
        "security",
        "token-optimization",
        "tdd",
        "behavioral-testing",
        "pressure-testing"
      ],
      "category": "development",
      "strict": false
    },
    {
      "name": "skillkit-essentials",
      "description": "Essential skills for everyday development: beginner-friendly explanations (baby-education), comprehensive README creation (readme-expert), LLM prompt optimization (prompt-engineering), AI-to-human doc transformation (humanize-docs), technical spec creation (quick-spec), pre-deployment QA checklisting (pre-deploy-checklist), and developer progress logging (been-there-done-that).",
      "source": "./bundles/essentials",
      "versio

Read the full file on GitHub · 256 lines

Files

What ships with it

1 file beside marketplace.json 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.

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 · 256 lines scan A 2fdeeb8a7847

Subscribe to this mod's changes

skillkit-marketplace is a plugin published in the GitHub repository rfxlamia/skillkit (101 stars, last pushed 5mo ago), licensed Apache-2.0. 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.