Strix Code Vulnerability Scan
usestrix/strix
Runs a Strix white-box security review that reads the source, then exploits what it finds in a sandbox so each reported issue has a proof-of-concept.
Subdomain discovery via subfinder, DNS brute-force, and passive sources
Install Subdomain Enumeration
$ npx skills add NeoTheCapt/RedteamAgent --skill subdomain-enumeration -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install NeoTheCapt/RedteamAgent subdomain-enumeration --agent claude-codeProject scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).
$ git clone --depth 1 https://github.com/NeoTheCapt/RedteamAgent.git skills-src && mkdir -p .claude/skills && cp -r skills-src/agent/skills/subdomain-enumeration .claude/skills/subdomain-enumeration && rm -rf skills-srcUse ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.
Claude Code skills documentation · loads skills from .claude/skills/
Install the "subdomain-enumeration" agent skill from https://github.com/NeoTheCapt/RedteamAgent/tree/master/agent/skills/subdomain-enumeration into .claude/skills/subdomain-enumeration/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "subdomain-enumeration", then confirm the skill loads.Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$skill-installer install https://github.com/NeoTheCapt/RedteamAgent/tree/master/agent/skills/subdomain-enumerationType this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.
$ npx skills add NeoTheCapt/RedteamAgent --skill subdomain-enumeration -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install NeoTheCapt/RedteamAgent subdomain-enumeration --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/NeoTheCapt/RedteamAgent.git skills-src && mkdir -p .agents/skills && cp -r skills-src/agent/skills/subdomain-enumeration .agents/skills/subdomain-enumeration && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "subdomain-enumeration" agent skill from https://github.com/NeoTheCapt/RedteamAgent/tree/master/agent/skills/subdomain-enumeration into .agents/skills/subdomain-enumeration/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "subdomain-enumeration", then confirm the skill loads.Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add NeoTheCapt/RedteamAgent --skill subdomain-enumeration -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install NeoTheCapt/RedteamAgent subdomain-enumeration --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/NeoTheCapt/RedteamAgent.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/agent/skills/subdomain-enumeration .cursor/skills/subdomain-enumeration && rm -rf skills-srcUse ~/.cursor/skills/ instead of .cursor/skills for a personal install.
Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/
Install the "subdomain-enumeration" agent skill from https://github.com/NeoTheCapt/RedteamAgent/tree/master/agent/skills/subdomain-enumeration into .cursor/skills/subdomain-enumeration/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "subdomain-enumeration", then confirm the skill loads.Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gemini skills install https://github.com/NeoTheCapt/RedteamAgent.git --path agent/skills/subdomain-enumeration--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.
$ npx skills add NeoTheCapt/RedteamAgent --skill subdomain-enumeration -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install NeoTheCapt/RedteamAgent subdomain-enumeration --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/NeoTheCapt/RedteamAgent.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/agent/skills/subdomain-enumeration .gemini/skills/subdomain-enumeration && rm -rf skills-srcUse ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.
Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/
Install the "subdomain-enumeration" agent skill from https://github.com/NeoTheCapt/RedteamAgent/tree/master/agent/skills/subdomain-enumeration into .gemini/skills/subdomain-enumeration/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "subdomain-enumeration", then confirm the skill loads.Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gh skill install NeoTheCapt/RedteamAgent subdomain-enumerationInstalls for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).
$ npx skills add NeoTheCapt/RedteamAgent --skill subdomain-enumeration -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/NeoTheCapt/RedteamAgent.git skills-src && mkdir -p .github/skills && cp -r skills-src/agent/skills/subdomain-enumeration .github/skills/subdomain-enumeration && rm -rf skills-srcUse ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.
GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/
Install the "subdomain-enumeration" agent skill from https://github.com/NeoTheCapt/RedteamAgent/tree/master/agent/skills/subdomain-enumeration into .github/skills/subdomain-enumeration/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "subdomain-enumeration", then confirm the skill loads.GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add NeoTheCapt/RedteamAgent --skill subdomain-enumeration -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install NeoTheCapt/RedteamAgent subdomain-enumeration --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/NeoTheCapt/RedteamAgent.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/agent/skills/subdomain-enumeration .opencode/skills/subdomain-enumeration && rm -rf skills-srcUse ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.
OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/
Install the "subdomain-enumeration" agent skill from https://github.com/NeoTheCapt/RedteamAgent/tree/master/agent/skills/subdomain-enumeration into .opencode/skills/subdomain-enumeration/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "subdomain-enumeration", then confirm the skill loads.OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
Facts
- Skill name
subdomain-enumeration- GitHub stars
- 142
- Token cost
- ~1.7k tokens
- SKILL.md length
- 283 words
- Files
- 1
- Skills in repo
- 25
- Repo updated
- First seen
- Licence
- None found
At a glance
Subdomain discovery via subfinder, DNS brute-force, and passive sources
- Works in 5 steps: Passive Enumeration with subfinder → DNS Brute-Force with ffuf → Filter, Verify & Fingerprint Subdomains → …
- Tasks that involve Penetration testing
- SKILL.md covers When to Activate, Tools, Methodology and What to Record
- Needs SUBFINDER_VIRUSTOTAL_API_KEY and SUBFINDER_SECURITYTRAILS_API_KEY
What it does
Subdomain Enumeration is an agent skill from NeoTheCapt/RedteamAgent. Subdomain discovery via subfinder, DNS brute-force, and passive sources
Its SKILL.md is about 1.7k tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.
It sits in Security, covering Penetration testing. The repository describes itself as: An AI red-team agent for authorized labs and web app pentesting workflows. Turns Claude Code / OpenCode / Codex into a structured recon → test → exploit → report workflow, with…
When your agent uses it
- Tasks that involve Penetration testing
Example prompts
- “/subdomain-enumeration”
Requirements
- A credential in SUBFINDER_VIRUSTOTAL_API_KEY
- A credential in SUBFINDER_SECURITYTRAILS_API_KEY
Workflow steps
5 steps, taken from the step headings in SKILL.md.
- Passive Enumeration with subfinder
- DNS Brute-Force with ffuf
- Filter, Verify & Fingerprint Subdomains
- Recursive Enumeration
- Feed Results into Pipeline
What it can do on your machine
Read from SKILL.md and the folder at commit 2e60476. It shows what the files ask for, not the result of running them.
Tool permissions
Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.
From allowed-tools in the SKILL.md frontmatter.
Runs code
No scripts in the folder and no shell commands in SKILL.md (its code samples are bash).
From the folder's file list and the shell code blocks in SKILL.md.
Network
No URLs in SKILL.md.
From URLs in SKILL.md, links to its own repository left out.
Credentials
Names these keys or tokens, usually read from environment variables:
SUBFINDER_VIRUSTOTAL_API_KEYSUBFINDER_SECURITYTRAILS_API_KEYSUBFINDER_SHODAN_API_KEY
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.
Context cost
Subdomain Enumeration loads about 1.7k tokens when it runs. Until then it costs about 23 tokens; SKILL.md has 283 words of instructions outside code blocks.
Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.
Safety
Auto-check: notes
The automated check noted patterns worth knowing about, such as sudo or a known installer.
- NoteMentions a .env fileSKILL.md:33
ith all sources (uses API keys from $DIR/.env if mounted) - NoteMentions a .env fileSKILL.md:46
ificantly. Configure in `$ENGAGEMENT_DIR/.env`: - NoteMentions a .env fileSKILL.md:52
into the container automatically via the .env volume mount.
Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.
SKILL.md
Without a licence we can't republish the file, so here is its outline and opening line. It has 283 words (~1,711 tokens).
“subfinder queries 40+ passive sources (crt.sh, VirusTotal, Shodan, SecurityTrails, etc.) without sending traffic to the target.”
- name
- subdomain-enumeration
- origin
- RedteamOpencode
Files
Just SKILL.md in agent/skills/subdomain-enumeration of NeoTheCapt/RedteamAgent.
Open the folder on GitHubat commit 2e60476
Compare with similar skills
Subdomain Enumeration next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.
| Skill | Stars | Used in | Tokens | Auto-check | Licence | Repo updated |
|---|---|---|---|---|---|---|
| Subdomain Enumeration this skillNeoTheCapt/RedteamAgent | 142 | — | ~1.7k | Automated safety check: Notes | None | |
| Strix Code Vulnerability Scanusestrix/strix | 67k | — | ~1.1k | Automated safety check: Pass | Apache-2.0 | |
| Code Audit3stoneBrother/code-audit | 893 | 1 repos | ~2.7k | Automated safety check: Pass | None | |
| Fix Strix Security Findingsusestrix/strix | 67k | — | ~1.5k | Automated safety check: Pass | Apache-2.0 | |
| Metabigor OSINT Reconj3ssie/metabigor | 1.9k | — | ~2.4k | Automated safety check: Pass | MIT | |
| Wooyun Legacytanweai/wooyun-legacy | 1.8k | — | ~1.9k | Automated safety check: Pass | Custom licence |
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Operates the metabigor CLI to map a target's network ranges, subdomains, ports, related domains, CDNs and archived URLs from free sources without API keys.
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Related
Categories
Questions about Subdomain Enumeration
What does Subdomain Enumeration do?
Subdomain discovery via subfinder, DNS brute-force, and passive sources. Subdomain Enumeration is an agent skill from NeoTheCapt/RedteamAgent.
When should I use Subdomain Enumeration?
Subdomain Enumeration fits situations like: tasks that involve Penetration testing.
How do I install Subdomain Enumeration in Claude Code?
Run `npx skills add NeoTheCapt/RedteamAgent --skill subdomain-enumeration -a claude-code`. Or copy the skill folder (agent/skills/subdomain-enumeration in NeoTheCapt/RedteamAgent) into .claude/skills/subdomain-enumeration in your project. Claude Code loads it when a task matches its description.
How do I install Subdomain Enumeration in Codex?
Run `npx skills add NeoTheCapt/RedteamAgent --skill subdomain-enumeration -a codex`. Or copy the skill folder (agent/skills/subdomain-enumeration in NeoTheCapt/RedteamAgent) into .agents/skills/subdomain-enumeration in your project. Codex loads it when a task matches its description.
Can I use Subdomain Enumeration in Cursor, Gemini CLI or GitHub Copilot?
Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add NeoTheCapt/RedteamAgent --skill subdomain-enumeration -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/subdomain-enumeration, .gemini/skills/subdomain-enumeration, .github/skills/subdomain-enumeration and .opencode/skills/subdomain-enumeration in your project.
What does Subdomain Enumeration need to run?
Going by SKILL.md and its folder, Subdomain Enumeration needs credentials named SUBFINDER_VIRUSTOTAL_API_KEY, SUBFINDER_SECURITYTRAILS_API_KEY and SUBFINDER_SHODAN_API_KEY. Our summary lists: A credential in SUBFINDER_VIRUSTOTAL_API_KEY; A credential in SUBFINDER_SECURITYTRAILS_API_KEY.
Does Subdomain Enumeration access the network?
SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.
Is Subdomain Enumeration safe to install?
Our automated static check of SKILL.md found notes only (mentions a .env file), nothing it rates as a warning. It is not a guarantee. Review the folder before installing.
What licence does Subdomain Enumeration use?
No licence was found for Subdomain Enumeration or its repository. Without one, default copyright applies: ask the author before reusing or redistributing it.
How many tokens does Subdomain Enumeration use?
About 1.7k tokens (SKILL.md is roughly 6.8k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.
What are the alternatives to Subdomain Enumeration?
Skills that share tags, products or a category with Subdomain Enumeration: Strix Code Vulnerability Scan (usestrix/strix, 67k stars), Code Audit (3stoneBrother/code-audit, 893 stars), Fix Strix Security Findings (usestrix/strix, 67k stars) and Metabigor OSINT Recon (j3ssie/metabigor, 1.9k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Subdomain Enumeration?
NeoTheCapt (a GitHub user) maintains it in NeoTheCapt/RedteamAgent, which has 142 GitHub stars. The repository holds 25 skills in this directory. The repository was last updated on August 2, 2026.
Source: NeoTheCapt/RedteamAgent on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.