knowledge-virtuoso

knowledge-virtuoso is a plugin for Claude Code from krzysztofsurdy/code-virtuoso. Its manifest loads nothing; the 15 skills it bundles cost 1,435 tokens per session together, scanned A, original, MIT.

A collection of software-development guidance covering design, refactoring, architecture, debugging, testing, APIs, security, teamwork, performance, microservices, Git, CI/CD, accessibility, and databases.

In plain words
What is it for?
Use it for code design and refactoring, debugging, testing, API and database work, security reviews, Git workflows, and continuous integration and delivery.
Why use it?
It gives agents reference guidance for making technical decisions across common development tasks.

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 krzysztofsurdy/code-virtuoso
agentmods
npx agentmods add plugins/krzysztofsurdy/code-virtuoso/knowledge-virtuoso
Clone the repo
git clone --depth 1 https://github.com/krzysztofsurdy/code-virtuoso

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 knowledge-virtuoso

README.md
[![agentmods](https://agentmods.dev/badge/plugins/krzysztofsurdy/code-virtuoso/knowledge-virtuoso.svg)](https://agentmods.dev/plugins/krzysztofsurdy/code-virtuoso/knowledge-virtuoso)
Your own site
<a href="https://agentmods.dev/plugins/krzysztofsurdy/code-virtuoso/knowledge-virtuoso"><img src="https://agentmods.dev/badge/plugins/krzysztofsurdy/code-virtuoso/knowledge-virtuoso.svg" alt="Measured on agentmods" height="20"></a>
Per session not measured What this adds to a session before it is invoked.
When invoked not measured The manifest loads nothing itself; its 15 skills cost 1,435 tokens a session between them.
Security scan A 0 findings. Scan, not verified.
Origin original No closer match found in the catalogue.
Security

Grade A, and why

knowledge-virtuoso 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 yesterday.

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#knowledge-virtuoso · 23 lines

What it actually says

{
  "name": "knowledge-virtuoso",
  "description": "15 knowledge skills — design patterns, refactoring, SOLID, debugging, clean architecture, testing, API design, security, scrum, performance, microservices, git workflow, CI/CD, accessibility, and database design",
  "source": "./",
  "strict": false,
  "skills": [
    "./skills/knowledge/design-patterns",
    "./skills/knowledge/refactoring",
    "./skills/knowledge/solid",
    "./skills/knowledge/debugging",
    "./skills/knowledge/clean-architecture",
    "./skills/knowledge/testing",
    "./skills/knowledge/api-design",
    "./skills/knowledge/security",
    "./skills/knowledge/scrum",
    "./skills/knowledge/performance",
    "./skills/knowledge/microservices",
    "./skills/knowledge/git-workflow",
    "./skills/knowledge/cicd",
    "./skills/knowledge/accessibility",
    "./skills/knowledge/database-design"
  ]
}
Files

What ships with it

1 file beside marketplace.json#knowledge-virtuoso 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. yesterday First seen · 23 lines scan A 2ffa6af6a997

Subscribe to this mod's changes

knowledge-virtuoso is a plugin published in the GitHub repository krzysztofsurdy/code-virtuoso (20 stars, last pushed 3mo 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 2026-09-03.