--- title: "Build Your Own Local AI Coding Agent with Gemma 4 and OpenCode" url: https://daily.dev/posts/build-your-own-local-ai-coding-agent-with-gemma-4-and-opencode-0qdn5fx8j source_url: https://towardsdatascience.com/build-your-own-local-ai-coding-agent-with-gemma-4-and-opencode-2 type: article source: "Towards Data Science" published: 2026-06-23T12:34:24.137Z updated: 2026-06-23T12:35:43.463Z tags: ["ollama", "local-ai", "gemma", "opencode"] reading_time: 7 upvotes: 0 comments: 0 language: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # Build Your Own Local AI Coding Agent with Gemma 4 and OpenCode **[Towards Data Science](https://daily.dev/sources/tds)** · 7 min read · 0 upvotes · 0 comments ## Summary A step-by-step guide to setting up a fully local AI coding agent using Ollama as the model server, Gemma 4 (E4B variant) as the LLM, and OpenCode as the agent interface. Covers installation on Windows and Linux, downloading and configuring Gemma 4 with a 128K context window via a Modelfile, and connecting OpenCode to the local Ollama endpoint via an opencode.json config. The result is a privacy-preserving, cost-free coding agent that keeps all data on-device. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Similar posts on daily.dev - [I Replaced Codex with Gemma 4 \+ Ollama — Here’s My Local AI Coding Agent](https://daily.dev/posts/i-replaced-codex-with-gemma-4-ollama-here-s-my-local-ai-coding-agent-n41mne32x) · Faun · 0 upvotes · 0 comments --- Tags: [#ollama](https://daily.dev/tags/ollama), [#local-ai](https://daily.dev/tags/local-ai), [#gemma](https://daily.dev/tags/gemma), [#opencode](https://daily.dev/tags/opencode) [View this post on daily.dev](https://daily.dev/posts/build-your-own-local-ai-coding-agent-with-gemma-4-and-opencode-0qdn5fx8j)