13 tagged error patterns, measured the same way as everything else here.
Browse within: best-practices 13
Skill Claude CodeCodex
Always use when user asks to create, generate, draw, or design a diagram, flowchart, architecture diagram, ER diagram, sequence diagram, class diagram, network diagram, mockup, wireframe, or UI sketch, or mentions draw.io, drawio, drawoi, .drawio files, or diagram export to PNG/SVG/PDF.
Skill Claude CodeCodex
Review recently changed files for code reuse, quality, and efficiency issues, then fix them. Use when implementation is already complete and you want a final cleanup pass that mirrors Claude Code's /simplify behavior as closely as Codex can, without overriding Claude's native /simplify.
Skill Claude CodeCodex
Shell and tool-call environment facts: escaping inside single-quoted zsh/jq/Python strings, complex regex in zsh, absolute paths and cwd resets between Bash calls, linter invocation, curl and JSON output handling, and choosing a built-in tool over a shell one-liner.