[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"doc-detail-114245-en":3,"doc-seo-114245-105":29,"detail-sidebar-cat-0-en-105":90},{"code":4,"msg":5,"data":6},0,"success",{"doc_id":7,"user_id":8,"nickname":9,"user_avatar":10,"doc_module":4,"category_id":11,"category_name":12,"doc_title":13,"doc_description":14,"doc_content":15,"file_id":16,"file_url":17,"file_type":18,"file_size":19,"view_count":4,"is_deleted":4,"is_public":20,"is_downloadable":20,"audit_status":20,"page_count":21,"language":22,"language_code":23,"site_id":24,"html_lang":23,"table_of_contents":25,"faqs":26,"seo_title":13,"seo_description":14,"update_tm":27,"read_time":28},114245,4398048949847,"Eliana","https://ap-avatar.wpscdn.com/avatar/400002536579ef2da7f?_k=1778318612642679267",6,"Technology","Hands-On Context Engineering - Building Context Systems for Agentic AI - Applications","Hands-On Context Engineering focuses on building practical context systems for agentic AI, guiding readers from foundational principles to applied techniques across retrieval, tools-as-context, and memory. It presents an end-to-end roadmap that covers context selection, transformation, boundary management, and lifecycle operations, culminating in evaluation and optimization. Early Release ebooks provide author draft content so readers can apply these methods well before the official publication, accelerating implementation and experimentation in real projects.","Hands-On Context Engineering  \nBuilding Context Systems for Agentic AI  \nApplications  \nWith Early Release ebooks, you get books in their earliest form—the author ’s raw and unedited content as they write—so you can take advantage of these technologies long before the official release of these titles.  \nXinye Tang and Wei Sun  \n[OceanofPDF.com](OceanofPDF.com)  \nHands-On Context Engineering  \nby Xinye Tang and Wei Sun  \nCopyright © Xinye Tang and Wei Sun. All rights reserved.  \nPublished by O’Reilly Media, Inc., 141 Stony Circle, Suite 195, Santa Rosa, CA 95401.  \nO’Reilly books may be purchased for educational, business, or sales promotional use. Online editions are also available for most titles ([https://oreilly.com](https://oreilly.com)). For more information, contact our corporate/institutional sales department: 800-998-9938 or [corporate@oreilly.com](corporate@oreilly.com).  \nAcquisitions Editor: Nicole Butterfield  \nDevelopment Editor: Shira Evans  \nProduction Editor: Destiny Baitinger  \nCover Designer: Susan Brown  \nCover Illustrator: José Marzan Jr.  \nInterior Illustrator: Kate Dullea  \nNovember 2027: First Edition  \nRevision History for the Early Release  \n 2026-07-13: First Release  \nSee [https://oreilly.com/catalog/errata.csp?isbn=9798295900105](https://oreilly.com/catalog/errata.csp?isbn=9798295900105) for release details.  \nThe O’Reilly logo is a registered trademark of O’Reilly Media, Inc. HandsOn Context Engineering, the cover image, and related trade dress are trademarks of O’Reilly Media, Inc.  \nThe views expressed in this work are those of the author(s) and do not represent the publisher ’s views. While the publisher and the author(s) have used good faith efforts to ensure that the information and instructions contained in this work are accurate, the publisher and the author(s) disclaim all responsibility for errors or omissions, including without limitation responsibility for damages resulting from the use of or reliance on this work. Use of the information and instructions contained in this work is at your own risk. If any code samples or other technology this work contains or describes is subject to open source licenses or the intellectual property rights of others, it is your responsibility to ensure that your use thereof complies with such licenses and/or rights.  \n979-8-295-9006-8  \n[OceanofPDF.com](OceanofPDF.com)  \nBrief Table of Contents ( Not Yet Final)  \nPart I: Foundations: Building Context Systems (available)  \nChapter 1: Foundations of Context Engineering (available)  \nChapter 2: Building a Baseline Context Pipeline (available)  \nPart II: Context Sources: Knowledge, Tools, and Memory (unavailable)  \nChapter 3: Retrieving External Knowledge (unavailable)  \nChapter 4: Tools as Context Generators (unavailable)  \nChapter 5: Building Memory Systems (unavailable)  \nPart III: Shape and Control Context (unavailable)  \nChapter 6: Context Selection and Prioritization (unavailable) Chapter 7: Processing and Transforming Context (unavailable) Chapter 8: Context Boundaries, Isolation and Safety (unavailable)  \nChapter 9: Managing Context Lifecycle (unavailable)  \nPart IV: Context in Complex Systems (unavailable)  \nChapter 10: Context for Multi-Step Workflows (unavailable)  \nChapter 11: Context for Multi-Agent Systems (unavailable)  \nPart V: Building Complete Context Systems (unavailable)  \nChapter 12: Evaluating, Observing, and Optimizing Context Systems (unavailable)  \nChapter 13: Capstone: Completing the End-to-End Context System (unavailable)  \n[OceanofPDF.com](OceanofPDF.com)  \nPreface  \nConventions Used in This Book  \nThe following typographical conventions are used in this book: Italic  \nIndicates new terms, URLs, email addresses, filenames, and file extensions  \nConstant width  \nUsed for program listings, as well as within paragraphs to refer to program elements such as variable or function names, databases, data types, environment variables, statements, and keywords  \nConstant width bold  \nShows 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