Zukko Blog
Guides to Claude Code, Cursor, Codex and the Claude and GPT APIs: setup, token savings and troubleshooting.
Claude Code, opencode, Aider, Cline — how harnesses differ
3 min · · harness
They all read your project and edit code. The differences are in how much they ask, how much they spend, and where they live.
The agent says "I have no access to your files" — what broke
3 min · · harness
The model answers "I cannot access your project" even though the agent is configured. Almost always it's tool calls, not the model.
What an agent harness is, and how it differs from an IDE plugin
3 min · · harness
A model on its own cannot read files or run commands. The harness does that. Here is how it works.
Obsidian: setting up an AI plugin with your own API key
5 min · · инструменты
Obsidian AI plugins ask for three fields — endpoint, key, model. What goes in each, and why the first request sometimes fails with a 404.
Raycast: an extension using Claude and GPT on your own key
4 min · · IDE
Raycast AI bills by subscription seat; your own key bills by actual usage. Building a TypeScript extension that talks to the API directly, bypassing built-in AI.