A Gopher's Guide to Vibe Coding

Keynote delivered at DevFest Birmingham 2025.

1. Birmingham Daniela Petruzalek Developer Relations, Google Cloud A Gopher’s Guide to Vibe Coding
2. About me… DevRel at Google UK Originally from Brazil Backend / Data Engineer Currently obsessed with AI Love Games, Anime and Cats =^_^=
3. Agenda The Developer’s Craft The Technology Ways of Working
4. The Developer’s Craft
5. https://www.tomshardware.com/tech-industry/artificial-intelligence/jensen-huang-advises-against-learning -to-code-leave-it-up-to-ai Published 25/Feb/2024 https://www.finalroundai.com/blog/sam-altman-says-world-wants-1000x-more-software Published 24/Jul/2025
7. Vibe coding is a coding approach that relies on LLMs to generate working code by providing natural language descriptions rather than manually writing it
8. What could possibly go wrong? 😅
11. Everyone in this room is capable of cooking, but not everyone in this room is a professional chef
12. The Technology
13. Jules Asynchronous coding agent that helps with fixing bugs, creating documentation and adding new features jules.google
14. Gemini CLI Open source coding agent that uses the Gemini model family. Can be used standalone or in combination with an IDE geminicli.com
15. Stitch Design agent to create web and mobile interfaces. Export to Figma or directly generate the frontend code stitch.withgoogle.com
16. Antigravity Google Antigravity is our agentic development platform, evolving the IDE into the agent-first era antigravity.google
17. Ways of Working
19. A Simple Ticket Template Context To Do Not To Do (optional) Acceptance Criteria
20. A Good Prompt Task: what you want to achieve, including context, constraints, etc. References: links to documentation, reference implementations, etc. Testing: example commands with output.
21. RED Write a Failing Test GREEN All Tests Pass REFACTOR
22. Vibe Coding is TDD on steroids RED: Start with a new feature request Make it work → GREEN PURPLE: Make it GOOD!
23. My Current Workflow Business Value Technical Certainty High High Low
24. My Current Workflow Business Value Technical Certainty High High Low TOP PRIORITY NOT DOING NEEDS RESEARCH NICE TO HAVE
25. My Current Workflow Business Value Technical Certainty High High Low SYNC Gemini CLI + IDE ASYNC Deep Research Prototyping ASYNC Jules Don’t! (or Jules)
26. Final Words Handcrafted code: for what you really care about Develop your prompting / story writing skills Actively manage your context window Prioritise your tasks Equip your toolbox with MCP servers
27. Codelab: Build an MCP server with Gemini CLI and Go goo.gle/cli-lab
28. Birmingham Examples: github.com/danicat/devfest2025 Daniela Petruzalek Developer Relations, Google Cloud danicat.dev | @danicat83 Thank you!