> For the complete documentation index, see [llms.txt](https://dyns.ntd.asia/power-dynamics/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://dyns.ntd.asia/power-dynamics/artificial-intelligence/study-copilot-studio/core-agent-building-blocks.md).

# Core Agent Building Blocks

- [Topics & the Authoring Canvas](https://dyns.ntd.asia/power-dynamics/artificial-intelligence/study-copilot-studio/core-agent-building-blocks/topics-and-the-authoring-canvas.md): Session 2.1 — the authoring canvas, topics, trigger phrases, and the core node types, with a Northwind Outfitters Returns & Exchanges topic built step by step.
- [Entities and Variables](https://dyns.ntd.asia/power-dynamics/artificial-intelligence/study-copilot-studio/core-agent-building-blocks/entities-and-variables.md): Session 2.2 — entities, custom closed-list and regex entities, slot filling (including proactive slot filling), and variable scope (topic vs. global), built on the Northwind Outfitters Returns & Excha
- [Generative Answers and Instructions](https://dyns.ntd.asia/power-dynamics/artificial-intelligence/study-copilot-studio/core-agent-building-blocks/generative-answers-and-instructions.md): Session 2.3 of 4 — Core Agent Building Blocks. The generative answers node and agent instructions in Microsoft Copilot Studio, verified against Microsoft Learn.
- [Review & Retrieval](https://dyns.ntd.asia/power-dynamics/artificial-intelligence/study-copilot-studio/core-agent-building-blocks/review-and-retrieval.md): Session 2.4 of 4 — Group 2, Core Agent Building Blocks. Combines topics, entities, variables, and generative answers into one build; adds pass/return variables between topics, one-of-multiple-entities