Smart Contract Audit
forefy/.context
Comprehensive smart contract security audit framework with multi-expert analysis.
Deep reentrancy vulnerability analysis for Solidity contracts.
Install Reentrancy Auditor
$ npx skills add alt-research2/SolidityGuard --skill reentrancy-auditor -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install alt-research2/SolidityGuard reentrancy-auditor --agent claude-codeProject scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).
$ git clone --depth 1 https://github.com/alt-research2/SolidityGuard.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.claude/skills/solidity-guard/skills/reentrancy-auditor .claude/skills/reentrancy-auditor && rm -rf skills-srcUse ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.
Claude Code skills documentation · loads skills from .claude/skills/
Install the "reentrancy-auditor" agent skill from https://github.com/alt-research2/SolidityGuard/tree/main/.claude/skills/solidity-guard/skills/reentrancy-auditor into .claude/skills/reentrancy-auditor/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "reentrancy-auditor", then confirm the skill loads.Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$skill-installer install https://github.com/alt-research2/SolidityGuard/tree/main/.claude/skills/solidity-guard/skills/reentrancy-auditorType this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.
$ npx skills add alt-research2/SolidityGuard --skill reentrancy-auditor -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install alt-research2/SolidityGuard reentrancy-auditor --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/alt-research2/SolidityGuard.git skills-src && mkdir -p .agents/skills && cp -r skills-src/.claude/skills/solidity-guard/skills/reentrancy-auditor .agents/skills/reentrancy-auditor && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "reentrancy-auditor" agent skill from https://github.com/alt-research2/SolidityGuard/tree/main/.claude/skills/solidity-guard/skills/reentrancy-auditor into .agents/skills/reentrancy-auditor/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "reentrancy-auditor", then confirm the skill loads.Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add alt-research2/SolidityGuard --skill reentrancy-auditor -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install alt-research2/SolidityGuard reentrancy-auditor --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/alt-research2/SolidityGuard.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/.claude/skills/solidity-guard/skills/reentrancy-auditor .cursor/skills/reentrancy-auditor && rm -rf skills-srcUse ~/.cursor/skills/ instead of .cursor/skills for a personal install.
Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/
Install the "reentrancy-auditor" agent skill from https://github.com/alt-research2/SolidityGuard/tree/main/.claude/skills/solidity-guard/skills/reentrancy-auditor into .cursor/skills/reentrancy-auditor/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "reentrancy-auditor", then confirm the skill loads.Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gemini skills install https://github.com/alt-research2/SolidityGuard.git --path .claude/skills/solidity-guard/skills/reentrancy-auditor--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.
$ npx skills add alt-research2/SolidityGuard --skill reentrancy-auditor -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install alt-research2/SolidityGuard reentrancy-auditor --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/alt-research2/SolidityGuard.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/.claude/skills/solidity-guard/skills/reentrancy-auditor .gemini/skills/reentrancy-auditor && rm -rf skills-srcUse ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.
Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/
Install the "reentrancy-auditor" agent skill from https://github.com/alt-research2/SolidityGuard/tree/main/.claude/skills/solidity-guard/skills/reentrancy-auditor into .gemini/skills/reentrancy-auditor/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "reentrancy-auditor", then confirm the skill loads.Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gh skill install alt-research2/SolidityGuard reentrancy-auditorInstalls for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).
$ npx skills add alt-research2/SolidityGuard --skill reentrancy-auditor -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/alt-research2/SolidityGuard.git skills-src && mkdir -p .github/skills && cp -r skills-src/.claude/skills/solidity-guard/skills/reentrancy-auditor .github/skills/reentrancy-auditor && rm -rf skills-srcUse ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.
GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/
Install the "reentrancy-auditor" agent skill from https://github.com/alt-research2/SolidityGuard/tree/main/.claude/skills/solidity-guard/skills/reentrancy-auditor into .github/skills/reentrancy-auditor/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "reentrancy-auditor", then confirm the skill loads.GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add alt-research2/SolidityGuard --skill reentrancy-auditor -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install alt-research2/SolidityGuard reentrancy-auditor --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/alt-research2/SolidityGuard.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/.claude/skills/solidity-guard/skills/reentrancy-auditor .opencode/skills/reentrancy-auditor && rm -rf skills-srcUse ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.
OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/
Install the "reentrancy-auditor" agent skill from https://github.com/alt-research2/SolidityGuard/tree/main/.claude/skills/solidity-guard/skills/reentrancy-auditor into .opencode/skills/reentrancy-auditor/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "reentrancy-auditor", then confirm the skill loads.OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
Facts
- Skill name
reentrancy-auditor- GitHub stars
- 104
- Token cost
- ~1.8k tokens
- SKILL.md length
- 271 words
- Files
- 1
- Skills in repo
- 7
- Repo updated
- First seen
- Licence
- Custom licence
At a glance
Deep reentrancy vulnerability analysis for Solidity contracts.
- Works in 5 steps: Purpose → Reentrancy Variants → Detection Workflow → …
- Tasks that involve Smart contract auditing
- SKILL.md covers 1. Purpose, 2. Reentrancy Variants, 3. Detection Workflow and 4. Secure Patterns, plus 1 more section
- Calls rg
What it does
Reentrancy Auditor is an agent skill from alt-research2/SolidityGuard. Deep reentrancy vulnerability analysis for Solidity contracts. Covers single-function, cross-function, cross-contract, and read-only reentrancy. Maps all external call paths and validates CEI pattern compliance.
Its SKILL.md is about 1.8k tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.
It sits in Security, covering Smart contract auditing and Smart contracts. It works with Solidity. The repository describes itself as: Solidity/EVM smart contract security auditor — 104 vulnerability patterns, 8 tools, 100% CTF + EVMBench benchmark (120/120).
When your agent uses it
- Tasks that involve Smart contract auditing
- Tasks that involve Smart contracts
Example prompts
- “/reentrancy-auditor”
Requirements
- Pre-approved tools (allowed-tools): Read, Grep, Glob
Workflow steps
5 steps, taken from the step headings in SKILL.md.
- Purpose
- Reentrancy Variants
- Detection Workflow
- Secure Patterns
- Finding Format
What it can do on your machine
Read from SKILL.md and the folder at commit 35645e8. It shows what the files ask for, not the result of running them.
Tool permissions
Pre-approves these tools, so the agent can use them without asking each time:
ReadGrepGlob
From allowed-tools in the SKILL.md frontmatter.
Runs code
Shell commands in SKILL.md call:
rg
From the folder's file list and the shell code blocks in SKILL.md.
Network
No URLs in SKILL.md.
From URLs in SKILL.md, links to its own repository left out.
Credentials
Names no API keys, tokens, secrets or passwords.
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.
Context cost
Reentrancy Auditor loads about 1.8k tokens when it runs. Until then it costs about 58 tokens; SKILL.md has 271 words of instructions outside code blocks.
Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.
Safety
Auto-check passed
The automated check found no risky patterns in SKILL.md.
Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.
SKILL.md
Its licence (Custom licence) doesn't allow us to republish the file, so here is its outline and opening line. It has 271 words (~1,799 tokens).
“Detect all variants of reentrancy vulnerabilities in Solidity contracts. Reentrancy is the #1 cause of DeFi exploits historically, responsible for The DAO ($60M), Rari Capital ($80M), and many others.”
- name
- reentrancy-auditor
- allowed-tools
- Read, Grep, Glob
Files
Just SKILL.md in .claude/skills/solidity-guard/skills/reentrancy-auditor of alt-research2/SolidityGuard.
Open the folder on GitHubat commit 35645e8
Compare with similar skills
Reentrancy Auditor next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.
| Skill | Stars | Used in | Tokens | Auto-check | Licence | Repo updated |
|---|---|---|---|---|---|---|
| Reentrancy Auditor this skillalt-research2/SolidityGuard | 104 | — | ~1.8k | Automated safety check: Pass | Custom licence | |
| Smart Contract Auditforefy/.context | 152 | 1 repos | ~5.1k | Automated safety check: Pass | MIT | |
| Smart Contract Auditelophanto/EloPhanto | 106 | — | ~2.7k | Automated safety check: Pass | Custom licence | |
| Fizzpashov/skills | 1.2k | 2 repos | ~11k | Automated safety check: Pass | MIT | |
| Fizz Convertpashov/skills | 1.2k | 2 repos | ~3.7k | Automated safety check: Pass | MIT | |
| Smart Contract Auditgreatpie/smart-contract-audit-skill | 101 | — | ~1.1k | Automated safety check: Pass | None |
Similar skills
Smart Contract Audit
elophanto/EloPhanto
A skill your agent uses when reviewing a Solidity, Vyper, or Rust (Solana/Anchor) smart contract for paid audit work or pre-launch sanity check.
Fizz
pashov/skills
Generate Echidna/Medusa-compatible Solidity fuzz suites from Foundry or Hardhat projects.
Fizz Convert
pashov/skills
Convert English-language properties in PROPERTIES.md (produced by the Fizz skill) into Solidity assertions inside the existing fuzz harness, then flip their checkboxes.
Smart Contract Audit
greatpie/smart-contract-audit-skill
Script-backed, out-of-box auditing workflow for Solidity/EVM repositories based on EVMbench detect/patch/exploit methodology.
Solidity Auditor
Gabson0x/bountyforge
Security audit of Solidity code while you develop. An agent skill from Gabson0x/bountyforge.
More from alt-research2/SolidityGuard
Storage Analyzer
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Analyzes storage layout, proxy patterns, and state variable security in Solidity contracts.
Entry Point Analyzer
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Analyzes Solidity contract entry points to map attack surface.
Fuzz Generator
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Generates Foundry invariant tests and Echidna property-based fuzz tests for Solidity contracts.
Report Generator
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Generates professional security audit reports from findings.
Solidity Vulnerability Scanner
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Comprehensive Solidity contract security scanner detecting 104 vulnerability patterns across reentrancy, access control, arithmetic, DeFi, proxy, and token categories.
Spec Compliance
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Validates Solidity implementation against specification documents.
Related
Works with
Categories
Questions about Reentrancy Auditor
What does Reentrancy Auditor do?
Deep reentrancy vulnerability analysis for Solidity contracts. Reentrancy Auditor is an agent skill from alt-research2/SolidityGuard. Deep reentrancy vulnerability analysis for Solidity contracts.
When should I use Reentrancy Auditor?
Reentrancy Auditor fits situations like: tasks that involve Smart contract auditing; tasks that involve Smart contracts.
How do I install Reentrancy Auditor in Claude Code?
Run `npx skills add alt-research2/SolidityGuard --skill reentrancy-auditor -a claude-code`. Or copy the skill folder (.claude/skills/solidity-guard/skills/reentrancy-auditor in alt-research2/SolidityGuard) into .claude/skills/reentrancy-auditor in your project. Claude Code loads it when a task matches its description.
How do I install Reentrancy Auditor in Codex?
Run `npx skills add alt-research2/SolidityGuard --skill reentrancy-auditor -a codex`. Or copy the skill folder (.claude/skills/solidity-guard/skills/reentrancy-auditor in alt-research2/SolidityGuard) into .agents/skills/reentrancy-auditor in your project. Codex loads it when a task matches its description.
Can I use Reentrancy Auditor in Cursor, Gemini CLI or GitHub Copilot?
Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add alt-research2/SolidityGuard --skill reentrancy-auditor -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/reentrancy-auditor, .gemini/skills/reentrancy-auditor, .github/skills/reentrancy-auditor and .opencode/skills/reentrancy-auditor in your project.
What does Reentrancy Auditor need to run?
Going by SKILL.md and its folder, Reentrancy Auditor needs the command-line tools its instructions call (rg). Its frontmatter pre-approves these tools: Read, Grep, Glob.
Does Reentrancy Auditor access the network?
SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.
Is Reentrancy Auditor safe to install?
Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.
What licence does Reentrancy Auditor use?
Reentrancy Auditor has a licence file (the repository's licence) that doesn't match a standard licence. Read it on GitHub before reusing the skill.
How many tokens does Reentrancy Auditor use?
About 1.8k tokens (SKILL.md is roughly 7.2k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.
What are the alternatives to Reentrancy Auditor?
Skills that share tags, products or a category with Reentrancy Auditor: Smart Contract Audit (forefy/.context, 152 stars), Smart Contract Audit (elophanto/EloPhanto, 106 stars), Fizz (pashov/skills, 1.2k stars) and Fizz Convert (pashov/skills, 1.2k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Reentrancy Auditor?
alt-research2 (a GitHub organization) maintains it in alt-research2/SolidityGuard, which has 104 GitHub stars. The repository holds 7 skills in this directory. The repository was last updated on June 12, 2026.
Source: alt-research2/SolidityGuard on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.