Condition-Based Async Waiting

About

The Condition-Based Waiting skill provides Claude with specialized patterns to identify and fix timing-related test failures. It replaces brittle sleep or setTimeout calls with smart polling mechanisms that wait for actual state changes, ensuring tests run as fast as possible while remaining stable across different environments like CI/CD pipelines. This approach is essential for testing asynchronous operations, event-driven systems, and complex state transitions where fixed delays often lead to intermittent failures or unnecessarily long execution times.

Key Features

• Replaces arbitrary sleep and setTimeout calls with smart polling logic
• Handles complex conditions like event counts, state transitions, and file system changes
• Implements generic waitFor patterns with configurable timeouts and polling intervals
• 81 GitHub stars
• Reduces total test suite execution time by eliminating unnecessary wait periods
• Distinguishes between arbitrary timing guesses and legitimate timing behavior tests

Use Cases

• Fixing flaky tests that pass on local machines but fail under load in CI environments
• Waiting for asynchronous event emissions or background process completions
• Optimizing integration tests by replacing fixed delays with state-aware polling