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AI EngineeringJavaScript

Codex Explain

by sd0xdev

Codex Explain is an AI Engineering skill for Claude Code, published by sd0xdev in sd0x-harness.

188 stars24 forkson sd0xdev/sd0x-harnessAdded 2026/09/06Repository updated 2026/09/05
View source on GitHubDownload repo ZIP
agent-harnessclaude-codeclaude-code-plugincodexharness-engineeringskills
Install in seconds
Install Codex Explain
Copy Codex Explain into your Claude Code skills folder. Run the command in your terminal, or review the source on GitHub before installing.
terminal
npx degit https://github.com/sd0xdev/sd0x-harness/tree/main/skills/codex-explain ~/.claude/skills/codex-explain

Requires Node.js. Downloads this skill only — not the rest of the repository — into your Claude Code skills folder.

Without Node.js

git clone https://github.com/sd0xdev/sd0x-harness.git

Clones the whole repository, then copy the skill’s own directory into your skills folder yourself.

In this catalog

Source file
skills/codex-explain/SKILL.md in sd0xdev/sd0x-harness
Installs to
~/.claude/skills/codex-explain
Collection
One of 25 skills cataloged from this repository
Category
AI Engineering — 3278 skills

What Codex Explain does

Codex Explain produces structured explanations of code at a chosen depth. Use it to understand complex logic, trace data flow, or onboard to unfamiliar code.

Codex Explain is cataloged under AI Engineering on DirSkills. Codex Explain comes from a repository tagged agent-harness, claude-code, claude-code-plugin, codex and harness-engineering.

Documentation

README

Codex Explain Skill

Trigger

  • Keywords: explain code, what does this do, how does this work, code walkthrough

When NOT to Use

  • Code review (use codex-code-review)
  • Bug investigation (use bug-fix or issue-analyze)
  • Architecture overview (use code-explore)

Workflow

Read target → [Collect context] → Codex explain → Output explanation

Step 1: Read Target File

Read file content. If --lines specified, extract only that range.

Step 2: Codex Explanation

Dispatch per @skills/codex-code-review/references/codex-transport.md § Start with the explanation prompt. See references/codex-prompt-explain.md.

Depth Levels

This is the opening of the README. Read the full README on GitHub.

Commands Codex Explain provides

Slash commands named in this skill’s SKILL.md, listed in the order they first appear.

  • /codex-explain

Frequently asked about Codex Explain

  • What else does sd0xdev publish alongside Codex Explain?

    Codex Explain is one of 25 skills that DirSkills catalogs from sd0xdev/sd0x-harness, the repository it ships in. Its siblings there include Adr, Architecture Design and Ask. Each one is a separate skill with its own page in this directory, installs the same way Codex Explain does, and is maintained by sd0xdev in that same repository. The rest of the collection is listed on the sd0xdev/sd0x-harness page.

  • How does Codex Explain compare to other AI Engineering skills?

    Codex Explain ranks #2970 by stars among the 3278 AI Engineering skills in this catalog. The most-starred ones next to it are Architecture Decision Records, AI-First Engineering and Agentic OS. DirSkills ranks by the star count of the repository each skill ships in, so that order reflects how popular those repositories are rather than any review of Codex Explain against them. Open each page to compare what they document and how they install.

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