Real failures · Verifiable steps
Start with the exact failure, not another blind reinstall.
Focused guides for the Windows AI coding failures that are easy to misdiagnose. Each guide separates risk, investigation order, and proof of success.
Installed Codex plugin does not appear
Separate files on disk from marketplace registration, skill enablement, and real tool calls.
Read the guide → MCP CONNECTIONMCP stays failed or pending on Windows
Test process startup, transport, authentication, and resource access independently.
Read the guide → NOTIONNotion search works, but page fetch fails
Why identity success does not prove document access, and how to verify search → fetch.
Read the guide → WINDOWS / LINUXBash says no such file, but the file exists
Detect CRLF, ^M, shebang problems, and cross-shell path contamination.
Read the guide → NETWORKWebSocket timeout with HTTPS fallback
Decide whether it is a graceful degradation warning or a real work-blocking outage.
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