Concise monthly summary for 2026-04 focusing on business value and technical achievements. Key features delivered: Ast-grep Usage Documentation for tldr-pages/tldr detailing usage for searching, linting, and rewriting code using AST patterns in ast-grep (commit a9bc0d790d7d69e39e7a096f9332bb7aead9a437). Major bugs fixed: None reported this month. Overall impact and accomplishments: Improves onboarding and accelerates adoption of AST-based code analysis in the project, enabling faster tooling adoption and consistent documentation. Technologies/skills demonstrated: Documentation, Markdown, open-source collaboration (co-authored PR #21517), Git commit traceability, AST-pattern knowledge.

March 2026: Implemented a new high-value book resource in EbookFoundation/free-programming-books: Probabilistic Machine Learning: Advanced Topics. This addition expands access to advanced ML education and aligns with the repository’s goal of providing free, practical programming and data science resources. The update was coordinated with co-author Eric Hellman and includes a subject index update for discoverability.