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.
npx agentmods add skills/krzysztofsurdy/code-virtuoso/plugin-creatornpx skills add krzysztofsurdy/code-virtuoso --skill plugin-creatorgit clone --depth 1 https://github.com/krzysztofsurdy/code-virtuosoWrote 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/skills/krzysztofsurdy/code-virtuoso/plugin-creator)<a href="https://agentmods.dev/skills/krzysztofsurdy/code-virtuoso/plugin-creator"><img src="https://agentmods.dev/badge/skills/krzysztofsurdy/code-virtuoso/plugin-creator.svg" alt="Measured on agentmods" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00097 | $0.01514 |
| Opus 5 | $0.00048 | $0.00757 |
| Sonnet 5 | $0.00019 | $0.00303 |
| Haiku 4.5 | $0.00010 | $0.00151 |
Grade A, and why
plugin-creator 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.
How it starts
The opening of the file, as written. The whole thing — 91 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Plugin Creator
Scaffold a well-formed Claude Code plugin with exactly the components the user wants - no more, no less. A plugin is a self-contained directory with a manifest (.claude-plugin/plugin.json) plus any of: skills, agents, hooks, MCP servers, LSP servers, bin executables, output styles, default settings. This tool generates the correct structure, writes a valid manifest, adds a marketplace entry when requested, and explains how to test locally with --plugin-dir.
Core Principles
| Principle | Meaning |
|---|---|
| Manifest is optional, but recommended | If omitted, the directory name becomes the plugin name and components auto-discover at default locations. Provide one whenever metadata, versioning, or custom paths matter. |
| Default locations first | Prefer skills/, agents/, hooks/hooks.json, .mcp.json, .lsp.json at plugin root. Only override paths in plugin.json when there is a real reason. |
Components live at the root, not in .claude-plugin/ |
Only plugin.json belongs inside .claude-plugin/. Everything else (skills/, agents/, etc.) is at the plugin root. This is the single most common mistake. |
Use ${CLAUDE_PLUGIN_ROOT} for every plugin-internal path |
Absolute paths break when the plugin is cached. ${CLAUDE_PLUGIN_ROOT} resolves to the installed plugin directory at runtime. Use ${CLAUDE_PLUGIN_DATA} for state that must survive updates. |
| Namespacing is automatic | Plugin skills are always invoked as /plugin-name:skill-name. Names are derived from the name field in plugin.json (or directory name if no manifest). |
| Semantic versioning in one place | Set version in plugin.json OR in the marketplace entry - not both. When present in both, plugin.json wins. |
Workflow
This skill uses guided phases - each phase is a separate file loaded one at a time. Every phase ends with a gate where you must wait for user confirmation before proceeding. Do not skip phases or merge them.
What ships with it
10 files beside SKILL.md 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.
- phases/01-plugin-identity.md 1.5 KB
- phases/02-component-selection.md 1.3 KB
- phases/03-component-details.md 2.3 KB
- phases/04-distribution.md 1.4 KB
- phases/05-write-files.md 1.8 KB
- phases/06-test-instructions.md 1.1 KB
- references/component-templates.md 11 KB
- references/distribution.md 8.0 KB
- references/marketplace-manifest.md 12 KB
- references/plugin-manifest.md 11 KB
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.
- 2d ago First seen · 91 lines · 97 tokens per session scan A 23f4b016e681
plugin-creator is a skill published in the GitHub repository krzysztofsurdy/code-virtuoso (20 stars, last pushed 3mo ago), licensed MIT. It adds 97 tokens to every session and 1,514 once invoked, about $0.0005 per session on Opus 5. 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.
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