Exact error messages from Claude Code, Codex, Ollama and AI APIs, what they mean, and the fix I tested. Start with the Claude Code error lookup.
"Selected model is at capacity. Please try a different model." isn't your usage limit. What the Codex error means in the source code, what OpenAI staff said, why October 2026…
Codex CLI install guide from OpenAI's docs (Oct 21, 2026): four official install methods, which ChatGPT plans include the CLI, ChatGPT vs API key vs device code login, Windows support…
Claude Code install guide checked against Anthropic's docs on Oct 21, 2026: one-line installers for Mac, Windows and Linux, why you likely don't need Node, first login, and nine install…
Claude Code mods went live on October 1, 2026. Two weeks in, and the community catalogue awesome-claude-code-mods says it’s already scanned 4,314 of them (scan dated October 16). Most are…
A lookup table for Claude Code errors, checked against Anthropic's error reference on Oct 21, 2026: what 400, 401, 403, 429 and 529 mean, login problems A1-A4, usage problems U1-U11,…
My notes on how to write a Claude Code plugin: a manifest, a custom command, a hook, then a mod. The first one I want to build is a handoff…