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In this episode of Firebase After Hours, @peterfriese and @nohedev are joined by Jack Wotherspoon to explore the brand new "Agent Skills" feature in the Gemini CLI. If you've been stuffing everything into a massive GEMINI.md file, you're doing it the hard way.
We break down how Skills allow for "progressive disclosure," loading specialized context (like documentation, style guides, or scripts) only when you actually need them. You'll learn how to build your own skills—including a live demo where we create a "Firebase Rules Writer" skill on the fly and how to share them across your projects. Whether you're a CLI power user or just getting started with AI engineering, this is a game-changer for your workflow.
Resources
* Gemini CLI Repository:
* StreamPulse Demo App:
* Jack's Gemini CLI Course:
Chapters
0:00 - Intro
2:25 - Meet Jack Wotherspoon & Icebreakers
7:47 - What are Agent Skills?
9:54 - Skills vs. gemini.md (The Context Problem)
13:59 - Demo: The "Docs Writer" Skill
16:23 - Anatomy of a Skill (skill.md, Assets)
21:17 - Project vs. User Level Skills
24:46 - Assets vs. References
30:20 - StreamPulse App Demo (Live Voting)
34:36 - Live Build: Creating Firebase Rules Skills
40:11 - The Built-in "Skill Creator"
47:23 - Interactive Shells in Gemini
51:12 - Q&A: Vertex AI & Registries
53:10 - Resuming Sessions & Search History
55:12 - Tip: Terminal Setup & Key Bindings
1:02:00 - Shell Mode (!)
1:05:22 - IDE Integration (VS Code & Antigravity)
1:14:23 - Q&A: Unity/Mobil
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2026/01/22
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