ClaudSkills / Engineering / engineering-misc

Cross Ref

Q: What is a Claude Code skill and how does the Cross Ref skill fit in?

A Claude Code skill is a SKILL.md file that lives under ~/.claude/skills/<name>/ and tells the Claude Code CLI agent how to perform a specific task (instructions, prompts, allowed tools). Skills are auto-discovered at session start. Cross Ref is one of 67,000+ skills indexed in the open ClaudSkills catalog, classified under the Engineering category. Learn more at https://claudskills.com/learn/what-is-skill-md/.

Category: Engineering · Sub-category: engineering-misc · Last updated: 2026-06-10

Cross-reference GitHub PRs and issues to find duplicates and missing links. Spawns parallel Sonnet subagents to semantically analyze the last N PRs and issues, finding PRs that solve the same problem (duplicates) and issues resolved by open PRs but not yet linked. Groups findings into thematic clusters, scores them by actionability, and offers rate-limited commenting or bulk actions (close, label). Use this skill when the user wants to find duplicate PRs, link issues to PRs, clean up a repo's cross-references, or audit PR/issue relationships. Also useful when the user says things like "find related PRs", "which PRs fix this issue", "are there duplicate PRs", "link issues and PRs", or "audit cross-references".

From the source SKILL.md

You find hidden connections between PRs and issues that humans miss at scale. The core loop is: fetch → analyze in parallel → cluster → verify → report → act.

What this skill does

Cross Ref is a community-contributed Claude Code skill in the engineering-misc sub-category. It ships as a SKILL.md file that Claude Code auto-discovers under ~/.claude/skills/cross-ref/ and loads when your prompt matches the skill's trigger.

Who uses this skill

The Cross Ref Claude Code skill is built for software engineers, backend developers, full-stack teams, and technical leads building and maintaining production systems. It's part of ClaudSkills (also referred to as Claude Skills or Claude Code Skills) — the open community-curated registry of 116,000+ SKILL.md files for Anthropic's Claude Code agent and the wider Claude ecosystem (Claude API, Claude Agent SDK).

How to install

Free

Manual install (2 steps)

mkdir -p ~/.claude/skills/cross-ref
curl -L https://claudskills.com/skills/cross-ref/SKILL.md \
  -o ~/.claude/skills/cross-ref/SKILL.md

Or just download SKILL.md directly and drop it into ~/.claude/skills/cross-ref/. Claude Code auto-discovers it on next session.

Skills live at ~/.claude/skills/cross-ref/SKILL.md on macOS/Linux, or %USERPROFILE%\.claude\skills\cross-ref\SKILL.md on Windows. See the full install guide for step-by-step instructions.

📱 Install from your phone or desktop Telegram

Open @claudskills_bot on Telegram, tap Open Desktop App, and the desktop app installs this skill for you. Or share the bot link with a colleague — they get the same one-tap install. Learn more →

Pro

One-click install via the desktop app

The ClaudSkills desktop app installs any skill directly into ~/.claude/skills/ with one click — no terminal required. Pro starts at $9/mo or $149 lifetime.

Pro

For the full experience including quality scoring and one-click install features for each skill — upgrade to Pro.

See pricing → Download desktop app

Frequently asked questions

How do I install the Cross Ref Claude Code skill?

Install via the ClaudSkills desktop app (one click) or copy SKILL.md from the source repository to ~/.claude/skills/cross-ref/SKILL.md and restart Claude Code. Both flows are detailed at claudskills.com/install/.

What does the Cross Ref skill do?

Is this skill free to install?

Yes. ClaudSkills is an open registry — every skill keeps its source repository's license, and manual install via copy is free. ClaudSkills Pro ($9/mo, $79/yr, or $149 one-time) adds one-click install via the desktop app and a multi-signal Quality Score.

When should I use the Cross Ref skill?

Use Cross Ref when your Claude Code task falls under the Engineering category — specifically in the engineering misc area. Claude Code auto-discovers installed skills and invokes the right one based on the task description, so you can also ask Claude directly (e.g. "use Cross Ref" or describe the task and let Claude pick). Browse related skills at /category/engineering/.

What is a Claude Code skill and how does the Cross Ref skill fit in?

A Claude Code skill is a SKILL.md file that lives under ~/.claude/skills/<name>/ and tells the Claude Code CLI agent how to perform a specific task (instructions, prompts, allowed tools). Skills are auto-discovered at session start. Cross Ref is one of 67,000+ skills indexed in the open ClaudSkills catalog, classified under the Engineering category. Learn more at /learn/what-is-a-claude-skill/.

Attribution & license

Source: https://github.com/ndesv21/openclaw-master-skills/blob/HEAD/skills/cross-ref/SKILL.md
License: MIT
Author: ndesv21
Website: https://myclaw.ai

Cite this skill

If you reference this skill in a blog post, paper, or documentation, you can cite it as:

APA

ndesv21. (2026). Cross Ref [Claude Code skill]. ClaudSkills. https://claudskills.com/skills/cross-ref/

BibTeX

@misc{cross-ref-2026,
  author    = {ndesv21},
  title     = {Cross Ref [Claude Code skill]},
  year      = {2026},
  publisher = {ClaudSkills},
  url       = {https://claudskills.com/skills/cross-ref/}
}

Embed this skill

Promote, attribute, or link this skill from your own README, blog post, or documentation. All three snippets are free to use — no sign-up, no API key. More distribution surfaces →

Badge

[![ClaudSkills](https://claudskills.com/badge/cross-ref.svg)](https://claudskills.com/skills/cross-ref/?utm_source=badge&utm_medium=readme&utm_campaign=skill_badge)

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