Detects and fixes boundary violations, range errors, and edge-case logic bugs in PHP applications.
The find-boundary-issues skill is a specialized diagnostic tool for Claude Code designed to identify subtle logic errors and runtime risks in PHP codebases. It systematically scans for common pitfalls such as off-by-one errors in loops, unchecked array index access, empty collection handling, and integer overflows. By providing specific grep patterns and severity classifications, it helps developers harden their applications against crashes and unexpected behavior caused by invalid data ranges, multibyte string issues, or unhandled edge cases in date and time logic.
Key Features
01Scans for multibyte string handling issues and invalid date/time boundaries
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03Provides automated grep patterns for rapid codebase auditing and pattern matching
04Detects unchecked array and collection access risks that lead to runtime exceptions
05Identifies off-by-one errors in loops, substring operations, and array slices
06Flags potential integer overflows and underflows in mathematical calculations
Use Cases
01Conducting pre-release code reviews to ensure robust range and boundary validation
02Auditing legacy PHP codebases for hidden runtime exceptions and logic flaws
03Hardening application security by preventing logic-based vulnerabilities and buffer errors
