How does it detect potential deadlocks?

The skill looks for patterns where multiple locks are acquired in the same method and checks if the ordering is consistent, which is a primary preventive measure against deadlocks.

What kind of distributed lock issues can this skill find?

It identifies missing TTLs, non-atomic SETNX patterns, missing try/finally release blocks, unsafe local file locks in distributed environments, and inconsistent lock ordering that causes deadlocks.

Does this skill work with the Symfony Lock component?

Yes, it specifically encourages the use of Symfony's Lock component and can identify when custom implementations should be replaced by this standard framework tool.

Can it help with Redis-specific locking issues?

Yes, it detects unsafe Redis patterns such as calling SETNX and EXPIRE as two separate commands, recommending the atomic SET NX EX pattern instead.

PHP Distributed Lock Checker

Name: PHP Distributed Lock Checker
Author: dykyi-roman

bydykyi-roman

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Security & Testing

Analyzes PHP codebases to identify and fix critical distributed locking anti-patterns that cause deadlocks and race conditions.

This skill provides specialized static analysis for PHP applications to ensure robust distributed locking mechanisms across multi-instance deployments. It detects high-severity issues such as locks missing Time-To-Live (TTL) expirations, non-atomic Redis SETNX operations that risk permanent resource starvation, and inconsistent lock ordering that leads to deadlocks. By enforcing implementation patterns like Symfony's Lock component and mandatory try/finally blocks, it helps developers maintain system consistency and reliability in high-concurrency environments.

Key Features

01Analyzes lock acquisition sequences to prevent potential deadlock scenarios

02Detects locks without TTL to prevent permanent resource starvation after process crashes

0347 GitHub stars

04Audits Redis patterns for atomic SET NX EX usage to eliminate race conditions

05Promotes framework-standard implementations like the Symfony Lock component

06Identifies missing try/finally blocks to ensure guaranteed lock release

Use Cases

01Auditing legacy PHP applications for race conditions in background worker processes

02Ensuring safe resource coordination in multi-instance cloud-native deployments

03Performing specialized code reviews for high-stakes financial or inventory logic

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add dykyi-roman/awesome-claude-code check-distributed-locks

For use in Claude.ai and ChatGPT

Download Skill