bounty-hunting

bounty-hunting is a skill for Claude Code, Codex from MingyiSecLab/Mingyi-Atlas. It costs 35 tokens per session (1,301 once invoked), scanned A, a copy of bounty-hunting-methodology, Apache-2.0.

A method for finding security bugs in open-source projects that have a bug bounty, security advisory process, or responsible-disclosure policy. It emphasizes understanding the code and proving that a weakness can be exploited.

In plain words
What is it for?
Use it to assess a project’s security program, map its attack surface, investigate source code, and prepare evidence for a vulnerability report.
Why use it?
It helps focus research on meaningful, reportable issues and check whether the project accepts the finding before investing time.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

Good fit Use it to assess a project’s security program, map its attack surface, investigate source code, and prepare evidence for a vulnerability report.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/mingyiseclab/mingyi-atlas/bounty-hunting
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 bounty-hunting
Clone the repo
git clone --depth 1 https://github.com/MingyiSecLab/Mingyi-Atlas

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 bounty-hunting

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

Your own site · 80×15
<a href="https://agentmods.dev/skills/mingyiseclab/mingyi-atlas/bounty-hunting"><img src="https://agentmods.dev/badge/skills/mingyiseclab/mingyi-atlas/bounty-hunting.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 35 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,301 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 91% 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 5.1 $0.00035 $0.01301
Opus 5 $0.00017 $0.00651
Sonnet 5 $0.00007 $0.00260
Haiku 4.5 $0.00003 $0.00130

Measured 12d ago against content hash 317b91979b7e, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade A, and why

bounty-hunting 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 12d 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.

- `exec()`, `eval()`, `spawn()`, `subprocess.run()`, `os.system()`
Origin

This is a copy

91% identical to bounty-hunting-methodology — 5 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.

src/skills/standard/analyst/bounty-hunting/SKILL.md · 131 lines

How it starts

The opening of the file, as written. The whole thing — 131 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Bug Bounty Hunting Methodology

You are not scanning. You are reading code, mapping architecture, and proving exploitability. Volume is the enemy — signal is the metric. Every report must survive triage by an experienced security engineer.

Target Assessment

Before committing iteration budget, evaluate the target:

  1. Impact surface: downloads/week, GitHub stars, dependency depth. A vuln in lodash or React Router has 10-100x the impact of a vuln in a 200-star project.
  2. Trust boundary complexity: Does the app load config from untrusted sources? Handle plugins? Parse user-controlled serialized data? Multi-tenant auth? Complex trust boundaries = more attack surface.
  3. Security advisory history: Check github.com/advisories?query=<package>. Projects that accept and credit researchers will work with you. Projects with zero advisories are either very secure or don't have a disclosure process.
  4. Reward program: HackerOne, Bugcrowd, Immunefi, GitHub Security Advisories, Google VRP. Check scope, excluded vuln classes, and reward tiers.

Record the assessment as a node:

kg_add_node("repo", "<name>", props={"stars": N, "downloads_weekly": N,
  "has_security_policy": true, "advisory_count": N, "bounty_program": "hackerone"})

White-Box Methodology

This is the core loop. Fork. Read. Trace. Prove.

Step 1 — Map the project

find /workspace/target -name 'package.json' -o -name 'pyproject.toml' \
  -o -name 'go.mod' -o -name 'Cargo.toml' -o -name 'composer.json' | head -20

Identify: language, framework, entry points, config loading, auth middleware.

Step 2 — Map trust boundaries

Where does untrusted input enter the system? Trace these sources:

  • HTTP request params, headers, body
  • Environment variables and .env files
  • Config files from current directory (.gemini/settings.json, .vscode/settings.json)
  • Plugin/extension loading paths
  • Deserialization of user-controlled data (pickle, YAML, JSON with class hints)
  • IPC channels, WebSocket messages, MCP tool inputs

Read the full file on GitHub · 131 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. 12d ago First seen · 131 lines · 35 tokens per session scan A 317b91979b7e

Subscribe to this mod's changes

bounty-hunting is a skill published in the GitHub repository MingyiSecLab/Mingyi-Atlas (11 stars, last pushed 2mo ago), licensed Apache-2.0. It adds 35 tokens to every session and 1,301 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 1 finding (runs shell commands). It is 91% identical to bounty-hunting-methodology, differing in 5 lines, and is treated as a copy.