Tip: Run Fully Local Agentic Coding with Qwen3.5 27B via llama.cpp and OpenCode — Zero API Cost

r/LocalLLaMA·medium signal

A practitioner guide on r/LocalLLaMA details running a complete local agentic coding environment using Qwen3.5 27B served through llama.cpp, connected to OpenCode as the agent interface. The setup requires no API keys or cloud services. Key finding: there is a performance bug in default llama.cpp settings that makes local models run 90% slower than expected — the guide documents the fix. Qwen3.5 27B dense is genuinely competitive on coding evaluations at this parameter count.