code-check-concurrency

What problem does it solve?

Concurrency defects let duplicate records, inconsistent state, and double-processing slip through because local testing rarely includes retries, parallel requests, or stale UI responses.

Core Features & Use Cases

• Detects webhook retries without idempotency: Flags handlers that process provider events multiple times when retries happen.
• Detects unsafe mutation patterns: Reviews create/insert/charge/send flows for missing idempotency safeguards and double-submit risks.
• Finds lost updates and unsafe write boundaries: Identifies read-modify-write races, missing transactions for multi-step writes, and stale async UI responses.
• Audits background job repeat-safety: Spots jobs/workers that re-run and corrupt state because they are not idempotent.

Quick Start

Ask the AI to run a concurrency scan for races, idempotency, and transaction boundaries in the files changed by your current diff.