March 2026 monthly summary focused on delivering practical documentation and usage experiments to improve developer experience, performance, and onboarding across two major repos (nodejs/undici and axios/axios). Key work centered on cache-driven patterns, API behavior clarity, and RFC-compliant examples that reduce ambiguity and enable faster adoption of caching features. Highlights include: a practical Cache Interceptor Usage Example for the Fetch API in undici, clarifications of API behavior and RFC 2606-compliant documentation across the Dispatcher API, and BuildURL encoding clarifications in axios. These efforts have improved consistency, reduced support effort, and provided concrete examples that demonstrate business value through better performance visibility and easier integration for teams using these libraries. Key achievements: - Undici: Added a practical Cache Interceptor Usage Example for Fetch API to demonstrate caching and performance improvements (commit 407120545755b8c128857afa937674406c383e5d). - Undici: Documented API behavior clarifications (onResponseStart ignored) and added RFC 2606 domain usage with a cache interceptor fetch example in Dispatcher API (commits 4865, 4873, 4870). - Axios: Clarified BuildURL encoding process and replacement of URL-encoded characters with plain counterparts to improve developer understanding (commit 042e7763356f92a0459477839aea0bbc3c475908). - Cross-repo impact: Improved docs readability, onboarding, and consistency around caching usage and API behavior across undici and axios, enabling faster feature adoption and reduced ambiguity.