Flaky Test Root-Cause Analyzer

The problem

Intermittent test failures waste developer time, break CI pipelines, and hide real regressions. Traditional debugging often leads to blind retries or mutes that don't address the underlying race conditions or state leaks.

What it does

• Reconstructs failure patterns by analyzing logs, traces, and environment variables across passing and failing runs.
• Identifies root causes across 17 categories including shared mutable state, timing assumptions, and resource contention.
• Ranks hypotheses based on evidence to distinguish between probable causes and weak correlations.
• Provides a concrete reproduction plan and remediation steps without making destructive code changes.
• Calculates a 100-point stability score to determine if a test is safe for release gates.

Why this beats prompting it yourself

General LLMs often suggest simple timeouts or retries. This tool follows a 25-step technical audit that systematically checks for subtle issues like clock boundaries, database isolation levels, and worker reuse that are easily missed in manual reviews.

Use cases

• Diagnosing CI-only failures that cannot be replicated on local developer machines.
• Analyzing order-dependent test failures caused by incomplete cleanup or state leaks.
• Evaluating whether a flaky test should block a production release or be quarantined.
• Identifying synchronization issues in complex UI and browser-based integration tests.

Known limitations

Analysis only. This tool does not execute tests, modify source code, or fix infrastructure directly. It requires existing logs, traces, or code snippets to perform a diagnosis.