Imported from reason-machines/security-skills (skills/pentestcode-ai-pentest-agent/SKILL.md). Install upstream with npx skills add reason-machines/security-skills --skill pentestcode-ai-pentest-agent. Copyright stays with the author.

PentestCode AI Pentest Agent

Skill by ara.so — Security Skills collection.

PentestCode is an AI penetration testing agent that runs in your terminal with a multi-agent architecture. It maintains persistent engagement state, coordinates 13 specialized security agents, and automates reconnaissance through post-exploitation workflows. Built on TypeScript with Effect library.

Installation

# Quick install (self-contained binary)
curl -fsSL https://raw.githubusercontent.com/s0ld13rr/pentestcode/main/install.sh | bash

# Pin specific version
PENTESTCODE_VERSION=0.1.7 curl -fsSL https://raw.githubusercontent.com/s0ld13rr/pentestcode/main/install.sh | bash

# Custom install directory
PENTESTCODE_INSTALL=/usr/local/bin curl -fsSL https://raw.githubusercontent.com/s0ld13rr/pentestcode/main/install.sh | bash

# From source (requires Bun)
bun install
bun run build --single --skip-embed-web-ui
# Binary at packages/opencode/dist/pentestcode-<os>-<arch>/bin/pentestcode

Authentication & Configuration

# Configure LLM provider (required first step)
pentestcode auth login

# Configuration file: .pentestcode/pentestcode.jsonc

Example configuration:

{
  "provider": {
    "anthropic": {
      "model": "claude-sonnet-4-20250514",
      "apiKey": "${ANTHROPIC_API_KEY}"
    }
  },
  "mode": "auto",  // auto, free, or guided
  "pauseOnFindings": "checkpoint",  // never, always, checkpoint
  "scope": {
    "targets": ["10.10.10.0/24"],
    "exclude": ["10.10.10.1"]
  }
}

Supported providers: Anthropic, OpenAI, Google, Azure, AWS Bedrock, Ollama, Together, Groq, Fireworks, DeepSeek, Mistral.

Core Usage Patterns

Interactive Session

# Launch interactive mode
pentestcode

# Inside session
you: "pentest 10.10.10.5, goal is domain admin"
you: "scan 192.168.1.0/24 and enumerate all services"
you: "spray credentials across SMB and WinRM"

One-Shot Execution

# Execute single command and exit
pentestcode --prompt "scan 10.10.10.0/24 and enumerate all services"

# With custom config
pentestcode --config custom.jsonc --prompt "pentest 10.10.11.23"

CTF Mode

pentestcode --prompt "HTB box 10.10.11.45, find user.txt and root.txt"

Slash Commands

# Engagement dashboard
/status

# View discovered hosts and services
/targets

# Show vulnerabilities by severity
/vulns

# List discovered credentials
/creds

# View/edit target scope
/scope add 10.10.10.0/24
/scope exclude 10.10.10.1
/scope list

# Phase management
/phase         # Show current phase
/phase recon   # Jump to phase

# Switch operational modes
/mode auto     # Autonomous execution
/mode free     # No phase structure
/mode guided   # Step-by-step approval

# Pause behavior
/pause never      # Run continuously
/pause always     # Stop at every finding
/pause checkpoint # Stop at phase boundaries

# Generate report
/report

Multi-Agent Architecture

PentestCode uses 13 specialized agents coordinated by a strategist:

// Agent types and their roles:
// - pentest: Lead strategist/coordinator
// - recon: Passive information gathering
// - scanner: Active service discovery
// - enumerator: Service enumeration
// - exploiter: Vulnerability exploitation
// - identity: AD/Kerberos attacks
// - infrastructure: SNMP/IPMI/databases
// - webapp: OWASP Top 10 testing
// - post-exploit: Post-exploitation tasks
// - exploit-dev: Exploit development
// - critic: False positive checking
// - reporter: Report generation
// - (hidden): context compression, session management

Agents spawn in parallel and share engagement state:

# Scanner finds open ports → state updated
# Enumerator sees new services immediately → spawns parallel enumeration
# Exploiter receives vuln data → begins exploitation

Built-in Tools

Parser Tools (Mandatory Usage)

# nmap_parse - Parse nmap XML into engagement state
nmap -sS -sV -p- 10.10.10.5 -oX scan.xml
# Agent must use: nmap_parse scan.xml

# nuclei_parse - Parse Nuclei JSON findings
nuclei -u https://target.com -json -o nuclei.json
# Agent must use: nuclei_parse nuclei.json

# cme_parse - Parse NetExec/CrackMapExec output
netexec smb 10.10.10.0/24 -u users.txt -p passwords.txt > cme.log
# Agent must use: cme_parse cme.log

# gobuster_parse - Parse directory brute output
gobuster dir -u https://target.com -w wordlist.txt -o gobuster.txt
# Agent must use: gobuster_parse gobuster.txt

# bloodhound_parse - Parse SharpHound JSON
# Agent must use: bloodhound_parse bloodhound.json

# sqlmap_parse - Parse sqlmap output
# Agent must use: sqlmap_parse sqlmap.log

Analysis Tools

# xss_detect - Analyze HTTP responses for XSS
# Input: response body, reflected parameters
# Output: XSS vulnerability classification

# jwt_analyze - JWT security analysis
# Checks: alg:none, weak HMAC, expiry, claims

# scope_check - Validate targets against scope
# Returns: in_scope boolean, CIDR/wildcard matching

Tactical Tools

# cred_spray - Plan credential spray
# Inputs: credentials list, discovered services
# Output: spray plan across SMB/WinRM/RDP/LDAP/SSH

# attack_path_suggest - Graph-based attack path finding
# Algorithm: Dijkstra + Yen's K-shortest paths
# Output: Ranked paths to objective

# tunnel_manage - Manage pivot tunnels
# Supports: SSH, chisel, ligolo
# Tracks: Live sessions, tunnel topology

State Management Tools

// state_update - Record findings (30+ mutation types)
// Usage patterns:

// Add host
state_update({
  type: "add_host",
  ip: "10.10.10.5",
  hostname: "dc01.corp.local",
  os: "Windows Server 2019"
})

// Add service
state_update({
  type: "add_service",
  host: "10.10.10.5",
  port: 445,
  protocol: "tcp",
  service: "microsoft-ds",
  version: "Windows Server 2019"
})

// Add vulnerability
state_update({
  type: "add_vuln",
  host: "10.10.10.5",
  title: "SMB Signing Not Required",
  severity: "medium",
  confidence: 0.9,
  evidence: "nmap output shows signing disabled"
})

// Add credential
state_update({
  type: "add_cred",
  username: "administrator",
  password: "P@ssw0rd",
  type: "plaintext",
  domain: "CORP",
  valid_for: ["smb://10.10.10.5", "winrm://10.10.10.5"]
})

// Batch updates
state_update([
  { type: "add_host", ip: "10.10.10.6" },
  { type: "add_service", host: "10.10.10.6", port: 80 }
])

// state_query - Query engagement state (20+ query types)

// Get all hosts
state_query({ type: "hosts" })

// Get services on specific host
state_query({ type: "services", host: "10.10.10.5" })

// Get vulnerabilities by severity
state_query({ type: "vulns", severity: "critical" })

// Get all credentials
state_query({ type: "creds" })

// Get access paths
state_query({ type: "access", host: "10.10.10.5" })

// Get AD domain model
state_query({ type: "ad_domain" })

// Check attack paths to objective
state_query({ 
  type: "attack_paths", 
  source: "10.10.10.5",
  target: "domain_admin"
})

Engagement State Structure

The engagement state persists at .pentestcode/state.json:

interface EngagementState {
  // Hosts & services
  hosts: Array<{
    ip: string;
    hostname?: string;
    os?: string;
    ports: Array<{
      port: number;
      protocol: "tcp" | "udp";
      state: "open" | "closed" | "filtered";
      service?: string;
      version?: string;
      banner?: string;
    }>;
  }>;

  // Vulnerabilities
  vulns: Array<{
    id: string;
    host: string;
    title: string;
    severity: "critical" | "high" | "medium" | "low" | "info";
    status: "suspected" | "confirmed" | "exploited";
    confidence: number;  // 0.0-1.0
    evidence: string[];
    cve?: string;
  }>;

  // Credentials
  creds: Array<{
    username: string;
    password?: string;
    hash?: string;
    type: "plaintext" | "ntlm" | "aes256" | "rc4" | "ssh_key";
    domain?: string;
    valid_for: string[];  // URLs where cred works
  }>;

  // Access gained
  access: Array<{
    host: string;
    type: "shell" | "rdp" | "winrm" | "ssh" | "db" | "smb";
    username: string;
    privilege: "user" | "admin" | "system";
  }>;

  // Relationships (entity graph)
  relationships: Array<{
    from: string;
    to: string;
    type: "EXPLOITED_VIA" | "CREDENTIAL_FROM" | "ADMIN_OF" | "PIVOT_TO";
    cost: number;  // For path finding
  }>;

  // Active Directory model
  ad_domain?: {
    name: string;
    domain_controllers: string[];
    domain_admins: string[];
    password_policy: object;
    trusts: Array<{ domain: string; type: string }>;
  };

  // Current phase
  phase: "recon" | "scan" | "enumerate" | "exploit" | "post-exploit" | "report";
  
  // Objectives (for CTF/goal-oriented tests)
  objectives: Array<{
    id: string;
    description: string;
    status: "pending" | "complete";
    flag?: string;
  }>;
}

Real Workflow Example

# 1. Start engagement
pentestcode
you: "pentest 10.10.10.5, goal is domain admin"

# Agent flow:
# - Spawns scanner agent → runs nmap
# - Parses XML with nmap_parse → populates hosts/services in state
# - Recognizes ports 88 (Kerberos) + 389 (LDAP) → identifies DC
# - Spawns 3 parallel enumerators: SMB, LDAP, HTTP
# - SMB enumerator finds null session → writable share
# - LDAP enumerator extracts user list → updates state
# - HTTP enumerator runs gobuster → finds admin portal
# - Identity agent runs AS-REP roast → gets hash
# - Exploiter runs hashcat → cracks password
# - Post-exploit agent sprays cred across all services
# - WinRM access gained → spawns shell
# - Dumps SAM/LSA → extracts domain admin hash
# - Updates state with EXPLOITED_VIA relationships
# - Generates findings.md with evidence chain

# 2. Check progress
/status
# Shows: 1 DC, 7 services, 12 vulns, 3 creds, WinRM access

# 3. View findings
/vulns
# Lists vulnerabilities by severity with evidence

# 4. Review credentials
/creds
# Shows cracked passwords and where they work

# 5. Generate report
/report
# Creates markdown pentest report with timeline

Skills System

PentestCode loads knowledge packs on demand:

# Skills directory: .pentestcode/skills/

# Phase checklists (6 files)
PHASE_RECON.md
PHASE_SCAN.md
PHASE_ENUMERATE.md
PHASE_EXPLOIT.md
PHASE_POST_EXPLOIT.md
PHASE_REPORT.md

# Service knowledge (9 files)
SERVICE_SMB.md
SERVICE_SSH.md
SERVICE_HTTP.md
SERVICE_DNS.md
SERVICE_DATABASES.md
# ... etc

# Playbooks (4 files)
PLAYBOOK_INFRASTRUCTURE.md
PLAYBOOK_ACTIVE_DIRECTORY.md
PLAYBOOK_WEB_APPLICATION.md
PLAYBOOK_CLOUD.md

Add custom skills by creating SKILL_NAME.md:

# Custom Skill: Internal App Testing

## Tools
- Custom scanner at /opt/internal-scanner
- Credential wordlist at /wordlists/internal.txt

## Workflow
1. Run internal-scanner against target
2. Parse output with custom parser
3. ...

Skills are plain markdown — no code changes needed.

Mode-Specific Patterns

Auto Mode (Autonomous)

pentestcode --prompt "pentest 10.10.10.0/24"

# Agent:
# - Plans full engagement
# - Spawns subagents as needed
# - Progresses through phases automatically
# - Stops at checkpoints for review (if pause=checkpoint)

Free Mode (Unrestricted)

pentestcode
/mode free
you: "scan this random IP I found: 8.8.8.8"

# Agent:
# - Bypasses scope checks
# - No phase structure
# - Responds to direct requests
# - Useful for ad-hoc testing

Guided Mode (Step-by-Step)

pentestcode
/mode guided
you: "pentest 10.10.10.5"

# Agent proposes: "Run nmap -sS -sV -p- 10.10.10.5?"
you: "yes"
# Agent runs scan, then asks: "Enumerate SMB on port 445?"
you: "yes"
# ... continues with approval at each step

Troubleshooting

High Token Usage

# Use cheaper model for recon phases
{
  "provider": {
    "anthropic": {
      "model": "claude-haiku-3-5-20250305"  # Cheaper for bulk work
    }
  }
}

# Limit verbosity
you: "scan target, only report critical findings"

Agent Loops / Repeats Work

# Check state before running tools
/status
/targets  # See what's already discovered

# Be explicit
you: "enumerate HTTP on port 80 at 10.10.10.5, do not rescan"

# Use guided mode to prevent redundant actions
/mode guided

Parser Failures

# Parsers expect specific formats
# If tool output is non-standard, parse manually:

you: "the nmap XML is at scan.xml but format is unusual"
# Agent should read file, extract data, manually call state_update

# Check findings.md for parse errors
tail -f .pentestcode/findings.md

Missing Dependencies

# PentestCode doesn't bundle pentest tools
# Install separately:

# Kali/Debian
sudo apt install nmap nuclei gobuster netexec bloodhound crackmapexec

# Arch
sudo pacman -S nmap

# macOS
brew install nmap nuclei gobuster

Scope Violations

# Agent stops: "Target out of scope"
/scope add 10.10.11.0/24

# Bypass scope checks temporarily
/mode free
you: "scan 1.2.3.4"
/mode auto  # Return to normal

Environment Variables

# LLM Provider Keys
export ANTHROPIC_API_KEY="sk-ant-..."
export OPENAI_API_KEY="sk-..."
export GOOGLE_API_KEY="..."

# Custom config location
export PENTESTCODE_CONFIG="/path/to/config.jsonc"

# Install directory
export PENTESTCODE_INSTALL="/usr/local/bin"

# Version pinning (for install script)
export PENTESTCODE_VERSION="0.1.7"

Integration Patterns

With Existing Tools

# Run external tools, feed to PentestCode
nmap -sS -sV -p- 10.10.10.5 -oX scan.xml
pentestcode --prompt "parse scan.xml and continue pentest"

# Chain with CTF tools
python exploit.py > output.txt
pentestcode --prompt "analyze output.txt and suggest next steps"

With CI/CD

#!/bin/bash
# Automated security testing pipeline

pentestcode --prompt "scan staging environment at 10.0.1.0/24" \
  --config ci.jsonc \
  --report report.md

# Check for critical findings
if grep -q "severity: critical" report.md; then
  exit 1
fi

Programmatic State Access

// Read engagement state from another tool
import fs from 'fs';

interface State {
  hosts: Array<{ ip: string; ports: any[] }>;
  vulns: Array<{ severity: string; title: string }>;
  creds: Array<{ username: string; password: string }>;
}

const state: State = JSON.parse(
  fs.readFileSync('.pentestcode/state.json', 'utf-8')
);

// Extract critical vulns
const critical = state.vulns.filter(v => v.severity === 'critical');

// Get valid credentials
const valid_creds = state.creds.filter(c => c.valid_for.length > 0);

Performance Optimization

# Limit parallel agent spawning
{
  "maxParallelAgents": 3  # Default is unlimited
}

# Use local models for expensive operations
{
  "provider": {
    "ollama": {
      "model": "llama3.1:8b",
      "baseURL": "http://localhost:11434"
    }
  }
}

# Checkpoint-based pausing reduces redundant work
/pause checkpoint  # Review at phase boundaries only

License

MIT License - See project LICENSE file for details.