Add new resources to the library (#2134)

Co-authored-by: Cursor Agent <[email protected]>

Author: marcklingen

pages/library/index.mdx

@@ -11,7 +11,8 @@ description: A collection of resources, blog posts, and talks to learn more abou
 
 - **Learn Prompting**, [docs page](https://learnprompting.org/docs)
 - **The Prompt Report: A Systematic Survey of Prompting Techniques**, [paper on arxiv](https://arxiv.org/pdf/2406.06608), [summary in tweets](https://x.com/learnprompting/status/1800931910404784380)
-- **How to prompt o1** (o1 isn’t a chat model – and that’s the point), [blog post](https://www.latent.space/p/o1-skill-issue), _by Ben Hylak_
+- **How to prompt o1** (o1 isn't a chat model – and that's the point), [blog post](https://www.latent.space/p/o1-skill-issue), _by Ben Hylak_
+- **Effective Context Engineering for AI Agents**, [blog post](https://www.anthropic.com/engineering/effective-context-engineering-for-ai-agents), _by Anthropic_
 
 ## Agents