web3-bug-classes

web3-bug-classes is a skill for Claude Code, Codex from Gabson0x/bountyforge. It costs 72 tokens per session (10,334 once invoked), scanned A, original, no licence file.

A reference guide to 10 common bug types in DeFi smart contracts, including reentrancy, oracle manipulation, and signature replay. DeFi means financial applications built on blockchains.

In plain words
What is it for?
It helps identify and investigate accounting, access-control, vault, flash-loan, proxy, and other smart-contract vulnerabilities.
Why use it?
It gives auditors known attack patterns to check instead of starting from an unstructured search.

Skill for Claude CodeCodex

Which agent this was written for is unclear — body not stored (licence); the path alone says nothing.

Good fit It helps identify and investigate accounting, access-control, vault, flash-loan, proxy, and other smart-contract vulnerabilities.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/gabson0x/bountyforge/web3-bug-classes
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 Gabson0x/bountyforge --skill web3-bug-classes
Clone the repo
git clone --depth 1 https://github.com/Gabson0x/bountyforge

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 web3-bug-classes

README.md
[![agentmods](https://agentmods.dev/badge/skills/gabson0x/bountyforge/web3-bug-classes/github.svg)](https://agentmods.dev/skills/gabson0x/bountyforge/web3-bug-classes)
Your own site
<a href="https://agentmods.dev/skills/gabson0x/bountyforge/web3-bug-classes"><img src="https://agentmods.dev/badge/skills/gabson0x/bountyforge/web3-bug-classes/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 web3-bug-classes

Your own site · 80×15
<a href="https://agentmods.dev/skills/gabson0x/bountyforge/web3-bug-classes"><img src="https://agentmods.dev/badge/skills/gabson0x/bountyforge/web3-bug-classes.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 72 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 10,334 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin unknown 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 $0.00072 $0.10334
Opus 5.5 $0.00029 $0.04134
Sonnet 5.5 $0.00014 $0.02067
Haiku 4.5 $0.00007 $0.01033

Measured 1mo ago against content hash 5d79fd580055, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

web3-bug-classes scanned grade A with 0 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 1mo 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.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

skills/web3/web3-bug-classes/SKILL.md · 1,123 lines

The source is not reproduced here

No licence file

A repository with no LICENSE is all rights reserved by default, so the body is not copied here. The metadata, the measurements and the link are.

Read it on GitHub

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. 1mo ago Changed · +2 lines 5d79fd580055
  2. 1mo ago First seen · 1,121 lines · 72 tokens per session scan A 03cd842c5cba

Subscribe to this mod's changes

web3-bug-classes is a skill published in the GitHub repository Gabson0x/bountyforge (455 stars, last pushed 1mo ago), with no licence file. It adds 72 tokens to every session and 10,334 once invoked, about $0.0003 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-14.

Related

Other skills, from other repositories