Sandboxing is the Key to Caching without False Positives

RWX presents its CI/CD platform as using automatic caching combined with sandboxed task execution to reduce cache misconfiguration and false cache hits. Unlike platforms such as GitHub Actions, where engineers typically define cache keys manually with tools like `hashFiles` while unrelated project files remain accessible during execution, RWX filters both determine cache inputs and restrict the files available to a task. The text argues that manually configured caches can overlook external dependencies, potentially causing builds to fail for other engineers or allowing untested defects into production. It describes sandboxing as a method of limiting a program’s access to files and resources, and states that applying it to task execution enables RWX to make cache results more reliable.

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