discovery

discovery is a skill for Claude Code from MingyiSecLab/Mingyi-Atlas. It costs 21 tokens per session (1,347 once invoked), scanned A, original, Apache-2.0.

A first-pass guide for mapping a website's directories, files, virtual hosts, and endpoints embedded in JavaScript.

In plain words
What is it for?
Use it to fuzz paths and file extensions, scan recursively, find virtual hosts, inspect JavaScript for endpoints and secrets, and check common sensitive files.
Why use it?
Important pages, backup files, alternate hostnames, or API routes may not be linked from the visible site.

Skill for Claude Code

Written for Claude Code: allowed-tools in frontmatter.

Good fit Use it to fuzz paths and file extensions, scan recursively, find virtual hosts, inspect JavaScript for endpoints and secrets, and check common sensitive files.

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Install with agentmods
npx agentmods add skills/mingyiseclab/mingyi-atlas/discovery
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.

Any agent
npx skills add MingyiSecLab/Mingyi-Atlas --skill discovery
Clone the repo
git clone --depth 1 https://github.com/MingyiSecLab/Mingyi-Atlas

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 discovery

README.md
[![agentmods](https://agentmods.dev/badge/skills/mingyiseclab/mingyi-atlas/discovery/github.svg)](https://agentmods.dev/skills/mingyiseclab/mingyi-atlas/discovery)
Your own site
<a href="https://agentmods.dev/skills/mingyiseclab/mingyi-atlas/discovery"><img src="https://agentmods.dev/badge/skills/mingyiseclab/mingyi-atlas/discovery/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.

agentmods 80×15 button for discovery

Your own site · 80×15
<a href="https://agentmods.dev/skills/mingyiseclab/mingyi-atlas/discovery"><img src="https://agentmods.dev/badge/skills/mingyiseclab/mingyi-atlas/discovery.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 21 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,347 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 1 finding. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Token cost

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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00021 $0.01347
Opus 5 $0.00010 $0.00674
Sonnet 5 $0.00004 $0.00269
Haiku 4.5 $0.00002 $0.00135

Measured 7d ago against content hash f9edef30680b, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-10, from the pricing page.

Security

Grade A, and why

discovery scanned grade A with 1 finding 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 7d 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.

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

code=$(curl -s -o /dev/null -w "%{http_code}" "https://<target>/$path")
src/skills/standard/recon/web-recon/discovery/SKILL.md · 117 lines

How it starts

The opening of the file, as written. The whole thing — 117 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Web Discovery — Directories, vHosts, JavaScript

Surface the application's path tree, alternate virtual hosts, and JS-embedded endpoints/secrets. This is the first pass of web recon — feeds every later sub-skill.

1. Directory & File Discovery

ffuf (Recommended — Fast, Flexible)

# Basic directory fuzzing
ffuf -u https://<target>/FUZZ -w /usr/share/wordlists/dirb/common.txt -mc 200,301,302,403

# With file extensions
ffuf -u https://<target>/FUZZ -w /usr/share/wordlists/dirb/common.txt \
    -e .php,.asp,.aspx,.jsp,.html,.js,.json,.xml,.txt,.bak,.old,.sql,.zip,.tar.gz

# Filter by response size (exclude default pages)
ffuf -u https://<target>/FUZZ -w wordlist.txt -fs <default_size>

# Recursive scanning (depth 2)
ffuf -u https://<target>/FUZZ -w wordlist.txt -recursion -recursion-depth 2

# Throttled for stealth
ffuf -u https://<target>/FUZZ -w wordlist.txt -rate 10 -mc 200,301,302,403

Sensitive Files to Check

# Common sensitive paths
for path in .env .git/config .htaccess robots.txt sitemap.xml \
    wp-config.php web.config server-status .DS_Store \
    backup.sql dump.sql database.sql .svn/entries \
    crossdomain.xml clientaccesspolicy.xml; do
    code=$(curl -s -o /dev/null -w "%{http_code}" "https://<target>/$path")
    echo "$code $path"
done

2. Virtual Host (vHost) Discovery

# vHost fuzzing via Host header
ffuf -u https://<target_ip>/ -H "Host: FUZZ.<target>" \
    -w /usr/share/wordlists/subdomains.txt -fs <default_size>

# With TLS SNI
ffuf -u https://FUZZ.<target>/ -w /usr/share/wordlists/subdomains.txt \
    -mc 200,301,302,403 -fs <default_size>

Why vHost discovery matters:

  • Multiple applications may share one IP but respond differently based on Host header
  • Internal/staging apps often hidden behind non-public vhost names

3. Nginx/Apache Alias Off-By-One Probe

When a server uses alias /var/www/static/ for /static, an off-by-one allows reading parent directory:

  • Configured: location /static { alias /var/www/static/; }/static../ becomes /var/www/static/../ → escapes to /var/www/
  • Vulnerable to: /static../<file> requests reading outside the alias root

Read the full file on GitHub · 117 lines

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. 7d ago First seen · 117 lines · 21 tokens per session scan A f9edef30680b

Subscribe to this mod's changes

discovery is a skill published in the GitHub repository MingyiSecLab/Mingyi-Atlas (11 stars, last pushed 2mo ago), licensed Apache-2.0. It adds 21 tokens to every session and 1,347 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-03.