performing-reconnaissance

performing-reconnaissance is a skill for Claude Code, Codex from EvilFreelancer/secs. It costs 41 tokens per session (3,422 once invoked), scanned B, a copy of performing-reconnaissance, Apache-2.0.

A security-research guide for gathering information about systems, domains, networks, and public online sources. Reconnaissance means mapping what is exposed before attempting further security work.

In plain words
What is it for?
OSINT (open-source intelligence), subdomain discovery, port scanning, network mapping, service identification, vulnerability scanning, email harvesting, and cloud-asset discovery, with authorization requirements for active scanning.
Why use it?
It gives structure to the early information-gathering phase, helping identify subdomains, services, technologies, public exposures, and other parts of an attack surface.

Skill for Claude CodeCodex

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.

agentmods
npx agentmods add skills/evilfreelancer/secs/performing-reconnaissance
Any agent
npx skills add EvilFreelancer/secs --skill performing-reconnaissance
Clone the repo
git clone --depth 1 https://github.com/EvilFreelancer/secs

Made for: Claude Code, Codex.

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 performing-reconnaissance

README.md
[![agentmods](https://agentmods.dev/badge/skills/evilfreelancer/secs/performing-reconnaissance.svg)](https://agentmods.dev/skills/evilfreelancer/secs/performing-reconnaissance)
Your own site
<a href="https://agentmods.dev/skills/evilfreelancer/secs/performing-reconnaissance"><img src="https://agentmods.dev/badge/skills/evilfreelancer/secs/performing-reconnaissance.svg" alt="Measured on agentmods" height="20"></a>
Per session 41 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 3,422 The whole file, excluding the scripts and references it only reads on demand.
Security scan B 2 findings. Scan, not verified.
Origin 100% copy Near-identical to another mod 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 $0.00041 $0.03422
Opus 5 $0.00020 $0.01711
Sonnet 5 $0.00008 $0.00684
Haiku 4.5 $0.00004 $0.00342

Measured 5d ago against content hash 3b46058e819c, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade B, and why

performing-reconnaissance scanned grade B with 2 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 5d 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.

Asks for rootmediumPrivilege escalation

A mod that escalates privileges can change anything on the machine, not only the project.

sudo nmap -sU --top-ports 1000 target.com

Makes network callslowCapability

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

curl -s "https://crt.sh/?q=%25.domain.com&output=json" | jq -r '.[].name_value' | sort -u
Origin

This is a copy

100% identical to performing-reconnaissance — 0 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

.agents/skills/performing-reconnaissance/SKILL.md · 487 lines

How it starts

The opening of the file, as written. The whole thing — 487 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Initial Access and Reconnaissance Skill

You are an offensive security expert specializing in reconnaissance, OSINT, and initial access techniques. Use this skill when the user requests help with:

  • External reconnaissance and information gathering
  • Subdomain enumeration
  • Port scanning strategies
  • OSINT techniques
  • Public exposure detection
  • Network mapping
  • Service fingerprinting
  • Vulnerability scanning

When to Use

Activate this skill when the user asks to:

  • Perform reconnaissance on a target
  • Enumerate subdomains
  • Discover attack surface
  • Find public exposures
  • Gather OSINT information
  • Map network infrastructure
  • Identify technologies in use
  • Help with initial access techniques

Scope and authorization. Passive collection against public sources is generally lawful; the moment you send packets to a host you are acting under whatever authorization you hold, and unauthorized scanning is a criminal offense in most jurisdictions (CFAA in the US, Computer Misuse Act in the UK). Two failure modes specific to recon:

  • Inherited infrastructure. Subdomain and ASN enumeration walks into third-party estate constantly — the CDN, the SaaS tenant, the shared host, the acquired subsidiary nobody listed. Resolve ownership before you probe; "it was in the DNS tree" is not authorization.
  • OSINT on people. Employee enumeration, credential-dump correlation, and social-profile harvesting are personal-data processing under GDPR and similar regimes. Confirm the engagement covers it, and keep what you collect inside the engagement.

Get the target list, the explicitly excluded ranges, and the active-testing window in writing before the first active probe.

When NOT to Use

  • You already have network access — use enumerating-network-services
  • Code-level review of a known target — use auditing-code-for-vulnerabilities
  • Pretext development for a phishing campaign — use performing-social-engineering
  • Investigating an adversary rather than a target — use hunting-threats

Read the full file on GitHub · 487 lines

Files

What ships with it

1 file 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.

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. 5d ago First seen · 487 lines · 41 tokens per session scan B 3b46058e819c

Subscribe to this mod's changes

performing-reconnaissance is a skill published in the GitHub repository EvilFreelancer/secs (10 stars, last pushed 26d ago), licensed Apache-2.0. It adds 41 tokens to every session and 3,422 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it B with 2 findings (asks for root, makes network calls). It is 100% identical to performing-reconnaissance, differing in 0 lines, and is treated as a copy.

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