LenaX
LenaX ist ein lokal-first KI-Coding-Agent für VS Code und JetBrains, entwickelt von Timo Böhme (TB-Software). Der Name kombiniert ‘Lena’ (meine Tochter) und ‘X’ (variable Form intelligenter Systeme). Ziel: Ein Agent, der lokal auf deinem Computer agiert, Dateien liest und schreibt, Markdown-Dokumente erstellt/zusammenfasst/überwacht und wirklich beim Programmieren hilft.
Fokusmodelle: xAI Grok Code Fast 1, Codex-ähnliche Codemodelle und selbstgehostete LLMs wie Mistral (OpenAI-kompatible APIs, Ollama/LM Studio). Keine Werbetexte, keine künstlichen Grenzen – du entscheidest, welche Anbieter/Modelle du verwendest.
What LenaX can actually do
- Code generation and explanation: From task description to structured code including comments and tests
- Refactoring and Quality: Clean rewrites, type safety, lint fixes, dead code removal
- Test Support: Minimal tests, snapshot adjustments, small test harnesses
- Local file access: Read/write project files, create/analyze/sync Markdown docs
- Task automation: builds, tests, terminal commands, simple script automations
- MCP Integration: Extensible via Model Context Protocol
- Agent modes: Plan (Architect), Implement (Coder), Debug (Debugger); custom mode presets available
Languages & Stacks (Examples)
- C#, VB.NET, PowerShell (Windows focus), SQL
- TypeScript/JavaScript (Node.js, React/Vite, WebView UI)
- Python (scripts, analysis, tools)
- Shell/Pipeline tasks
Models & Providers
- xAI Grok Code Fast 1 (Focus on fast code comprehension)
- Codex-like code models (code optimization, completion)
- Mistral/Mixtral and other OpenAI-compatible LLMs
- Local runners: Ollama, LM Studio (OpenAI API compatible)
Installation & Quick Start
VSIX Installation
) Download the VSIX file from tb-software.ch/page/lenax-ai-coder-agent down 2) In VS Code: Extensions → ... Menu → Install from VSIX... → Select the downloaded file
3) Restart VS Code
TB-Software default configuration
Install Settings (Gear icon) 3) Create a new profile
- Name:
TB-Software Test - Provider:
LM Studio - Base URL:
http://yourhosting.com/ - Model ID
mistralai/magistral-small-2509
) Click Save and activate the profile
Alternative: Local models (Ollama/LM Studio)
If you want to work completely locally: LM Studio or Ollama) Download a model (e.g. mistral, codellama, deepseek-coder) 3) Start the local server
4) Configure LenaX:
- Provider:
LM StudioorOllama - Base URL:
http://localhost:1234(LLMProxy)http://localhost:11434(Ollama) - Model ID Name of the loaded model
First task
<ol><li>Open the LenaX view</li><li>Enter a task, e.g.</li></ol>
- Create a C# class for customer orders with properties and validation
- Explain this function (after you’ve selected code)
- “Debug this error” (when displaying error messages)
Note: LenaX also works purely locally with self-hosted models – without external cloud services.