Add AI 3D modeling walkthrough article, AI CAD skill pack, and update Discord/3D Fuel links

Articles/readme.md

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+---
+title: "Community Articles & Technical Walkthroughs"
+category: "articles"
+order: 1
+description: "In-depth technical walkthroughs, maker project write-ups, and AI CAD workflows from the Fargo 3D Printing Meetup."
+tags:
+  - articles
+  - overview
+---
+
+# Community articles & technical walkthroughs
+
+In-depth project write-ups, technical guides, and experiment recaps from the Fargo 3D Print Meetup community.
+
+## Featured articles
+
+| Article / Resource | Topic | Summary |
+| :--- | :--- | :--- |
+| **[Building 3D-Printable CAD with AI](./AI-3D-Modeling-Walkthrough.md)** | AI CAD, SolidCraft, FigCraft, CadCraft & FreeCAD | How a zip-tied 40 mm fan on a MikroTik switch led us to build a four-skill AI CAD pipeline that turns steel ruler photos into 1:1 mm orthographic 2D blueprints and editable step-by-step 3D assemblies across `SnapS4`, `BC250`, and `Plerion`. |
+| **[AI CAD Skill & Agent Pack](./ai-cad-skill-pack/readme.md)** ([Download `.zip`](./ai-cad-skill-pack/ai-cad-skill-pack.zip)) | Skills, Custom Agents & Git Sparse-Checkout | Browse or download all four AI CAD skills (`.agents/skills/`), custom agents (`.github/agents/`), and steering files (`AGENTS.md`, `GEMINI.md`, `CLAUDE.md`, `.cad-tools.example.json`) via direct ZIP download or `git sparse-checkout`. |
+
+---
+
+**Last Updated**: October 31, 2026
+