Is the Add Tool skill free?

Yes. The skill itself is free from 26zl/cybersec-toolkit. SkillProof publishes the install command and an independent test verdict at no cost.

What is the Add Tool SkillProof Score?

9.6/10 — installs cleanly 5/5, triggers reliably 5/5, output vs. baseline 9/10, docs & honesty 5/5.

How do I install Add Tool?

Copy the install command from this page, run it in your terminal, and restart Claude Code. Skills live in ~/.claude/skills/ (global) or .claude/skills/ inside a project.

Can I use Add Tool with Cursor, Copilot, Gemini CLI, Codex or other AI tools?

The SKILL.md format is native to Claude (Claude Code, Desktop, claude.ai). The instructions inside adapt to other assistants: Cursor rules, GitHub Copilot instructions, Windsurf rules, Custom GPTs, AGENTS.md for OpenAI Codex, and GEMINI.md for Google Gemini CLI — our conversion guides cover each, and the free converter on the tools page does the wrapping for you.

Add Tool

Adds a new cybersecurity tool to this specific installer's modules, config, and validators.

by 26zl · 26zl/cybersec-toolkit

Tested · Works

Install — copy the command Download source ↗

Test report

Verdict: Tested · Works
Score: 9.6/10
Tested: Jul 15, 2026
Environment: Claude Code 2.x (agent harness)
Upstream re-checked: Aug 10, 2026 · 0bb6753

Real A/B in the cloned repo: my naive baseline added trivy via git-clone (no actual build step) and tripped the validator with 'Missing URL'; following the skill's preferred binary-release method plus its own validate_tools_config.py and validate_mcp_sync.py scripts landed a clean 0-errors/0-warnings pass.

Scored on four weighted criteria — install, triggering, output vs. baseline, docs. How scoring works

Installs cleanly 5/5
Triggers reliably 5/5
Output vs. baseline 9/10
Docs & honesty 5/5

What Add Tool does

Walks through registering a new tool in the cybersec-toolkit installer: picking the right module array (apt/pipx/go/cargo/binary/git), adding metadata to tools_config.json, and running the repo's own validator and MCP-sync scripts. Triggers on phrasing like 'add tool X', 'register a new tool', or 'include X in the installer' — it is scoped entirely to maintaining this one repo, not installing tools generally.

How to install Add Tool

git clone https://github.com/26zl/cybersec-toolkit
cd cybersec-toolkit
mkdir -p ~/.claude/skills
cp -r .claude/skills/add-tool ~/.claude/skills/add-tool

Skills live in ~/.claude/skills/ (global) or .claude/skills/ (per-project). Restart Claude Code after installing.

Commands — how to trigger Add Tool

/add-tool Adds a new cybersecurity tool to this specific installer's modules, config, and validators.

It also activates on plain-language prompts like these:

add trivy as a new tool to the containers module of the installer
register a new pipx based tool in the cybersec toolkit config
add this cli scanner to the installer and pass its own validators

Frequently asked questions

Is the Add Tool skill free?: Yes. The skill itself is free from 26zl/cybersec-toolkit. SkillProof publishes the install command and an independent test verdict at no cost.
Does Add Tool work with Claude Code?: We tested it with Claude Code 2.x (agent harness) on Jul 15, 2026. Verdict: Tested · Works. Real A/B in the cloned repo: my naive baseline added trivy via git-clone (no actual build step) and tripped the validator with 'Missing URL'; following the skill's preferred binary-release method plus its own validate_tools_config.py and validate_mcp_sync.py scripts landed a clean 0-errors/0-warnings pass.
What is the Add Tool SkillProof Score?: 9.6/10 — installs cleanly 5/5, triggers reliably 5/5, output vs. baseline 9/10, docs & honesty 5/5.
How do I install Add Tool?: Copy the install command from this page, run it in your terminal, and restart Claude Code. Skills live in ~/.claude/skills/ (global) or .claude/skills/ inside a project.
Can I use Add Tool with Cursor, Copilot, Gemini CLI, Codex or other AI tools?: The SKILL.md format is native to Claude (Claude Code, Desktop, claude.ai). The instructions inside adapt to other assistants: Cursor rules, GitHub Copilot instructions, Windsurf rules, Custom GPTs, AGENTS.md for OpenAI Codex, and GEMINI.md for Google Gemini CLI — our conversion guides cover each, and the free converter on the tools page does the wrapping for you.