poc-developer

poc-developer is an agent for coding agents from allsmog/vuln-scout. It costs 52 tokens per session (2,214 once invoked), scanned A, original, MIT.

An agent that develops working proof-of-concept exploit scripts for confirmed security vulnerabilities. A proof of concept is a small, reproducible demonstration that a vulnerability can be triggered.

In plain words
What is it for?
Use it during the exploit-development stage to turn a confirmed finding and payload into a documented script with setup, safety checks, and verification steps.
Why use it?
It starts from verified evidence and required conditions, reducing the risk of building an exploit around an unconfirmed issue.

Agent

Part of the vuln-scout plugin — 32 skills, 15 commands, 9 agents shipped together

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 agents/allsmog/vuln-scout/poc-developer
Clone the repo
git clone --depth 1 https://github.com/allsmog/vuln-scout

Or install vuln-scout, the plugin that ships this one along with the rest of its 32 skills, 15 commands, 9 agents.

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 poc-developer

README.md
[![agentmods](https://agentmods.dev/badge/agents/allsmog/vuln-scout/poc-developer.svg)](https://agentmods.dev/agents/allsmog/vuln-scout/poc-developer)
Your own site
<a href="https://agentmods.dev/agents/allsmog/vuln-scout/poc-developer"><img src="https://agentmods.dev/badge/agents/allsmog/vuln-scout/poc-developer.svg" alt="Measured on agentmods" height="20"></a>
Per session 52 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 2,214 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 1 finding. Scan, not verified.
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 $0.00052 $0.02214
Opus 5 $0.00026 $0.01107
Sonnet 5 $0.00010 $0.00443
Haiku 4.5 $0.00005 $0.00221

Measured 5d ago against content hash d3d73b9180ad, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

poc-developer 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 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.

Runs shell commandslowCapability

Expected in a hook, worth knowing in a rule or an instructions file.

return `this.constructor.constructor('return process')().mainModule.require('child_process').spawnSync('id').stdout.toString()`;
vuln-scout/agents/poc-developer.md · 308 lines

How it starts

The opening of the file, as written. The whole thing — 308 lines — stays where its author put it; the contents beside it link to each section on GitHub.

You are an exploit development specialist for Phase 3 of whitebox penetration testing - Proof of Concept Development.

Handoff Protocol

Receiving from local-tester

When receiving a confirmed vulnerability from local-tester, expect:

  • Finding ID: The id and stable_key from .claude/findings.json
  • Confirmed payload: Use this as the basis for the exploit script
  • Auth requirements: Credentials/tokens needed to reach the endpoint
  • Environment notes: Setup steps needed to reproduce
  • Test evidence: The observed vulnerable behavior

Use the confirmed payload as your starting point rather than developing payloads from scratch.

Examples

Your Core Responsibilities:

  1. Develop working exploit scripts for confirmed vulnerabilities
  2. Create clean, documented, reproducible PoC code
  3. Include safety checks and verification steps
  4. Ensure exploits are suitable for professional reporting

Development Process:

  1. Requirements Gathering

    • Understand the confirmed vulnerability
    • Identify target endpoint/function
    • Document required payloads and bypasses
    • Note authentication requirements
  2. Exploit Design Choose appropriate language:

    • Python: Web apps, network services (most common)
    • JavaScript: Client-side, XSS demonstrations
    • Bash: Simple command chaining, quick PoCs
    • Same as target: When reusing application logic

Read the full file on GitHub · 308 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. 5d ago First seen · 308 lines · 52 tokens per session scan A d3d73b9180ad

Subscribe to this mod's changes

poc-developer is an agent published in the GitHub repository allsmog/vuln-scout (24 stars, last pushed 2mo ago), licensed MIT. It adds 52 tokens to every session and 2,214 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it A with 1 finding (runs shell commands). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.