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Debug First

Category: Engineering  ·  Sub-category: engineering-misc  ·  Last updated:
type:debug
Auto-trigger khi gặp error, bug, exception, traceback, "không chạy", "bị lỗi", "sao lại", "why is", "crash", "undefined", "TypeError", "KeyError", "AttributeError", "ImportError", "ModuleNotFoundError", "FAILED", "AssertionError", "500 Internal Server Error", "CORS", "Cannot read properties", "null reference", "Stack trace", "Traceback (most recent call last)", paste error message, screenshot lỗi. Rule: ĐỌC ERROR MESSAGE TRƯỚC — 80% bugs nằm ngay trong error message. Không đoán, không Google ngay.

From the source SKILL.md

Core mandate: Đọc error message TRƯỚC. Không đoán. Không Google ngay. Không refactor để tránh bug.

What this skill does

Debug First 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/debug-first/ and loads when your prompt matches the skill's trigger.

Who uses this skill

The Debug First 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 70,000+ 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/debug-first
curl -L https://claudskills.com/skills/debug-first/SKILL.md \
  -o ~/.claude/skills/debug-first/SKILL.md

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

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

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

Cite this skill

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

APA
ClaudSkills. (2026). Debug First [Claude Code skill]. ClaudSkills. https://claudskills.com/skills/debug-first/
BibTeX
@misc{debug-first-2026,
  author    = {ClaudSkills},
  title     = {Debug First [Claude Code skill]},
  year      = {2026},
  publisher = {ClaudSkills},
  url       = {https://claudskills.com/skills/debug-first/}
}

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More Engineering skills

Browse all Engineering skills in the ClaudSkills registry, or explore these other picks from the same category:

Browse all Engineering skills → Top 100 skills
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