Deadlock Diagnoser

Q: What is a Claude Code skill and how does the Deadlock Diagnoser 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. Deadlock Diagnoser is one of 67,000+ skills indexed in the open ClaudSkills catalog, classified under the General category. Learn more at https://claudskills.com/learn/what-is-skill-md/.

Category: General · Sub-category: general-misc · Last updated: 2026-07-19

type:debug

Diagnose a database deadlock from the engine's own deadlock report, reconstruct the lock cycle (A holds 1 wants 2, B holds 2 wants 1), name the root cause — almost always two code paths locking the same rows in different orders — and fix it with consistent lock ordering, shorter transactions, and a retry-the-victim safeguard. Use when the DB logs deadlock errors, when transactions intermittently fail under load, or when queries mysteriously block each other.

Security AStatic scan found no risk patternsHow grading works ›

From the source SKILL.md

A deadlock looks random from the application — a transaction that worked a thousand times suddenly errors out under load — but the database already did the forensics for you. When the engine detects a cycle it picks a victim, rolls it back, and logs exactly who held what and waited on what. This skill reads that report instead of guessing: it pulls the Postgres deadlock log lines (or the SQL Server deadlock graph / innodb status in MySQL), reconstructs the cycle (A holds lock 1 and wants lock 2 while B holds 2 and wants 1), and names the real root cause — which is almost always two code paths…

What this skill does

Deadlock Diagnoser is a community-contributed Claude Code skill in the general-misc sub-category. It ships as a SKILL.md file that Claude Code auto-discovers under ~/.claude/skills/deadlock-diagnoser/ and loads when your prompt matches the skill's trigger.

When to invoke it: Use when the DB logs deadlock errors, when transactions intermittently fail under load, or when queries mysteriously block each other.

Who uses this skill

The Deadlock Diagnoser Claude Code skill is built for Claude Code users and developers across all disciplines looking for general-purpose AI assistance. It's part of ClaudSkills (also referred to as Claude Skills or Claude Code Skills) — the open community-curated registry of 196,000+ 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/deadlock-diagnoser
curl -L https://claudskills.com/skills/deadlock-diagnoser/SKILL.md \
  -o ~/.claude/skills/deadlock-diagnoser/SKILL.md

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

Skills live at ~/.claude/skills/deadlock-diagnoser/SKILL.md on macOS/Linux, or %USERPROFILE%\.claude\skills\deadlock-diagnoser\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 Deadlock Diagnoser Claude Code skill?

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

What does the Deadlock Diagnoser 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 Deadlock Diagnoser skill?

Use Deadlock Diagnoser when your Claude Code task falls under the General category — specifically in the general 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 Deadlock Diagnoser" or describe the task and let Claude pick). Browse related skills at /category/general/.

What is a Claude Code skill and how does the Deadlock Diagnoser 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. Deadlock Diagnoser is one of 67,000+ skills indexed in the open ClaudSkills catalog, classified under the General category. Learn more at /learn/what-is-a-claude-skill/.

Attribution & license

Source: https://github.com/imtiazrayhan/agentscamp-library/blob/HEAD/skills/deadlock-diagnoser/SKILL.md
License: MIT
Author: imtiazrayhan
Website: https://agentscamp.com

Cite this skill

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

APA

imtiazrayhan. (2026). Deadlock Diagnoser [Claude Code skill]. ClaudSkills. https://claudskills.com/skills/deadlock-diagnoser/

BibTeX

@misc{deadlock-diagnoser-2026,
  author    = {imtiazrayhan},
  title     = {Deadlock Diagnoser [Claude Code skill]},
  year      = {2026},
  publisher = {ClaudSkills},
  url       = {https://claudskills.com/skills/deadlock-diagnoser/}
}

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Badge

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Security scan

Grade A · scanned 2026-09-28 — free static scan against the OWASP Agentic Skills Top 10.

No risk patterns were found in any of the ten OWASP-aligned categories. How grading works ›

✓ Prompt injection
✓ Data exfiltration
✓ Supply chain
✓ Reverse shell
✓ Credentials
✓ Execution
✓ Filesystem
✓ Persistence
✓ Obfuscation
✓ Network

Show this grade on your repo (click to copy):

[![Security: A](https://img.shields.io/badge/Security-A-2e7d32)](https://claudskills.com/skills/deadlock-diagnoser/#security)

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Part of ClaudSkills — the open registry for Claude Skills & Claude Code Skills. · What's New · Install guide · About · llms.txt

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