Auto Bug Finder — Code Security Scanner#

Iterative, LLM-inspired bug detection and fixing system for production code. Currently supports Solidity (Hardhat + Slither). Extensible to Node.js, Python, and other stacks. Inspired by Andrej Karpathy's methodology: analyze → find → fix → test → repeat until clean.

What It Does#

Runs multi-tool security scans in iterative sprints:

1. Scan — Compiles, runs tests, runs static analysis (Slither for Solidity), checks coverage
2. Analyze — Parses all tool outputs into structured findings (Critical/High/Medium/Low/Info)
3. Fix — Generates patches for each finding with documentation
4. Verify — Recompiles, retests, rescans to confirm fixes
5. Loop — Repeats until 0 Critical/High/Medium findings OR 10 sprints max

When To Use#

• Before marking any Solidity contract as complete (mandatory per Netrix policy)
• Before mainnet deployment — catch issues cheaply on testnet
• After major refactors — verify no regressions
• As part of CI/CD — automated security gate

How To Use#

Quick Start#

bash

# Copy the skill into your contract project
cp skills/auto-bug-finder/auto-bug-finder.js projects/my-contract/auto-bug-finder.js

# Run from the project root (where hardhat.config.js lives)
cd projects/my-contract
node auto-bug-finder.js

Requirements#

• Node.js 18+
• Hardhat project with existing tests
• Slither ( pip install slither-analyzer)
• Solidity 0.8.x contracts

Output#

The script creates in auto-bug-finder/:

• FINAL-REPORT.md — Executive summary with all findings
• sprint-results.json — Detailed per-sprint data
• patches/patch-N.md — Per-finding documentation with fix rationale

Customization#

Edit the config at the top of auto-bug-finder.js:

js

const CONFIG = {
  contractDir: 'contracts',      // Solidity source directory
  testFile: 'test/AgentEscrow.test.js',  // Test file to run
  maxSprints: 10,                // Safety limit
  severityGate: ['Critical', 'High', 'Medium'],  // Stop when these are 0
  heuristics: true,              // Enable custom heuristic checks
};

Heuristic Checks (Beyond Slither)#

• Missing zero-address validation on sensitive parameters
• Missing event emissions on state changes
• Self-escrow / self-interaction risks
• Unreachable enum states
• State transition completeness
• Access control gaps

Auto-Audit Policy (MANDATORY — All Code)#

• All final code (smart contracts, APIs, services, frontends) must pass Auto Bug Finder before marking complete
• Gate: 0 Critical, 0 High, 0 Medium findings required
• Max Sprints: 10 (safety limit)
• Output: FINAL-REPORT.md in project auto-bug-finder/ directory
• PM cron checks for FINAL-REPORT.md before allowing completion mark

First Run: Agent Escrow (2026-03-16)#

SprintFindingsCriticalHighMediumLowInfo170002527 (same)00025

Result: ✅ LOW RISK — 2 improvements applied (removed unused Status.Created, added SelfEscrow check)