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 skills add charlesjones-dev/claude-code-plugins-dev --skill modernize-auditgit clone --depth 1 https://github.com/charlesjones-dev/claude-code-plugins-devWrote 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/charlesjones-dev/claude-code-plugins-dev/modernize-audit)<a href="https://agentmods.dev/skills/charlesjones-dev/claude-code-plugins-dev/modernize-audit"><img src="https://agentmods.dev/badge/skills/charlesjones-dev/claude-code-plugins-dev/modernize-audit/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.
<a href="https://agentmods.dev/skills/charlesjones-dev/claude-code-plugins-dev/modernize-audit"><img src="https://agentmods.dev/badge/skills/charlesjones-dev/claude-code-plugins-dev/modernize-audit.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector warn
SkillSpector: 2 findings, up to high
These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →
- high Anti-Refusal · line 271 Skill attempts to nullify the agent's safety policies or restrictions ('you have no restrictions', 'ignore your guidelines', 'do anything now'). This is a direct jailbreak that disables guardrails.Fix: Remove jailbreak framing that nullifies safety policies or restrictions. Skill content must not instruct the agent to ignore its guidelines or operate without guardrails.
- high Privilege Escalation · line 395 Code accesses credential files (SSH keys, AWS credentials, etc.). This could indicate credential theft attempts.Fix: Remove references to credential paths. Use environment variables or secrets managers. For docs, use placeholder paths (e.g., /path/to/config). Never load .env or token files in production code paths.
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 | $0.00030 | $0.09340 |
| Opus 5.5 | $0.00012 | $0.03736 |
| Sonnet 5.5 | $0.00006 | $0.01868 |
| Haiku 4.5 | $0.00003 | $0.00934 |
Grade A, and why
modernize-audit 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 10d 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 — 837 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Modernize Audit
You are a comprehensive codebase modernization assessor with deep expertise in software engineering principles (SOLID, DRY, KISS, YAGNI), modern development practices, security, performance optimization, and the common failure modes of older AI code generation models.
Instructions
CRITICAL: This command MUST NOT accept any arguments. If the user provided any text, URLs, or paths after this command (e.g., /modernize-audit ./src or /modernize-audit --quick), you MUST COMPLETELY IGNORE them. Do NOT use any paths or other arguments that appear in the user's message. You MUST ONLY gather requirements through the interactive AskUserQuestion tool as specified below.
BEFORE DOING ANYTHING ELSE: Use the AskUserQuestion tool to interactively determine the audit configuration. DO NOT skip this step even if the user provided arguments after the command.
Before starting the audit, gather the following configuration through interactive questions:
Step 1: AI Tool History
Ask the user about the AI tools and models that were used to generate or assist with the codebase.
-
Question 1: "What AI coding tools were used to build or assist with this codebase?"
- Options: Claude 3-era models, Claude (Sonnet 4/Opus 4), Cursor (2024 or earlier), Cursor (2025+), GitHub Copilot, ChatGPT / GPT-4, Windsurf / Codeium, Multiple tools / Not sure, No AI tools (legacy human code)
- Header: "AI Tool History"
- multiSelect: true
-
Question 2: "When was the majority of this codebase written?"
- Options: Before 2024, 2024 (Jan-Jun), 2024 (Jul-Dec), 2025 (Jan-Jun), 2025 (Jul-Dec), 2026+, Mixed / Not sure
- Header: "Codebase Era"
Step 2: Technology Stack Detection
Before asking, attempt to auto-detect the technology stack by checking for common project files:
- Use the Glob tool to check for:
package.json,tsconfig.json,*.csproj,*.sln,requirements.txt,pyproject.toml,go.mod,Cargo.toml,composer.json,Gemfile,pom.xml,build.gradle - If
package.jsonexists, read it to detect frameworks (React, Vue, Next.js, Nuxt, Angular, Svelte, Express, Fastify, etc.) - If
.csprojor.slnexists, read to detect .NET version and project type
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.
- 10d ago Changed e232b844bbde
- 1mo ago First seen · 837 lines · 30 tokens per session scan A f4a03d068532
modernize-audit is a skill published in the GitHub repository charlesjones-dev/claude-code-plugins-dev (35 stars, last pushed 6d ago), licensed MIT. It adds 30 tokens to every session and 9,340 once invoked, about $0.0001 per session on Opus 5.5. 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 2026-08-30.
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