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Agent skill

Common Debugging

by HoangNguyen0403 in HoangNguyen0403/agent-skills-standard

Troubleshoot systematically using the Scientific Method. An agent skill from HoangNguyen0403/agent-skills-standard.

MITAuto-check passedDevelopment

Install Common Debugging

skills CLI
$ npx skills add HoangNguyen0403/agent-skills-standard --skill common-debugging -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI
$ gh skill install HoangNguyen0403/agent-skills-standard common-debugging --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy
$ git clone --depth 1 https://github.com/HoangNguyen0403/agent-skills-standard.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/common/common-debugging .claude/skills/common-debugging && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Facts

Skill name
common-debugging
GitHub stars
572
Token cost
~528 tokens
SKILL.md length
238 words
Files
3 (incl. references)
Skills in repo
211
Repo updated
First seen
Licence
MIT

At a glance

Troubleshoot systematically using the Scientific Method. An agent skill from HoangNguyen0403/agent-skills-standard.

  • Works in 6 steps: OBSERVE: Gather error, logs, repro… → REPRODUCE: Make the failure happen on… → HYPOTHESIZE: State one hypothesis in… → …
  • Debugging crashes
  • SKILL.md covers Priority: P1 (HIGH), Root-Cause Protocol, Red Flags and Rationalization Prevention, plus 4 more sections
  • Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md

What it does

Common Debugging is an agent skill from HoangNguyen0403/agent-skills-standard. Troubleshoot systematically using the Scientific Method. Use when debugging crashes, tracing errors, diagnosing unexpected behavior, or investigating exceptions.

Its SKILL.md is about 530 tokens, which your agent loads only when the skill is triggered. The skill folder holds 4 other files, including reference files (for example `evals/evals.json` and `references/bug-report-template.md`).

It sits in Development, covering Debugging. The repository describes itself as: A collection of Agent Skills Standard and Best Practice for Programming Languages, Frameworks that help our AI Agent follow best practies on frameworks and programming laguages. The licence is MIT.

When your agent uses it

  • Debugging crashes
  • Diagnosing unexpected behavior
  • Investigating exceptions

Example prompts

  • “/common-debugging”

Workflow steps

6 steps, taken from the first numbered list in SKILL.md.

  1. OBSERVE: Gather error, logs, repro steps, recent diffs.
  2. REPRODUCE: Make the failure happen on demand or gather more evidence.
  3. HYPOTHESIZE: State one hypothesis in plain language.
  4. EXPERIMENT: Change one variable to prove or kill the theory.
  5. FIX: Touch code only after root cause proven.
  6. VERIFY: Re-run the failing case and regression checks.

What it can do on your machine

Read from SKILL.md and the folder at commit b529c2d. It shows what the files ask for, not the result of running them.

  • Tool permissions

    Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.

    From allowed-tools in the SKILL.md frontmatter.

  • Runs code

    No scripts in the folder and no shell commands in SKILL.md.

    From the folder's file list and the shell code blocks in SKILL.md.

  • Network

    No URLs in SKILL.md.

    From URLs in SKILL.md, links to its own repository left out.

  • Credentials

    Names no API keys, tokens, secrets or passwords.

    From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Common Debugging loads about 528 tokens when it runs, and up to ~688 if it reads all its reference files. Until then it costs about 45 tokens; SKILL.md has 238 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~45
When it runs · the whole SKILL.md, loaded when a task matches
~528
With references · SKILL.md plus every file in references/, read only if the agent opens them
~688

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check passed

The automated check found no risky patterns in SKILL.md.

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

The full file from HoangNguyen0403/agent-skills-standard at commit b529c2d, republished under its MIT licence (© HoangNguyen0403). 238 words, ~528 tokens.

Download SKILL.mdSave it as .claude/skills/common-debugging/SKILL.md (or your agent's skills folder). This skill also uses 2 other files; get the full folder from GitHub.
name
common-debugging
description
Troubleshoot systematically using the Scientific Method. Use when debugging crashes, tracing errors, diagnosing unexpected behavior, or investigating exceptions.

Debugging Expert

Priority: P1 (HIGH)

Root-Cause Protocol

  1. OBSERVE: Gather error, logs, repro steps, recent diffs.
  2. REPRODUCE: Make the failure happen on demand or gather more evidence.
  3. HYPOTHESIZE: State one hypothesis in plain language.
  4. EXPERIMENT: Change one variable to prove or kill the theory.
  5. FIX: Touch code only after root cause proven.
  6. VERIFY: Re-run the failing case and regression checks.

Red Flags

  • Stop if you are changing code before repro: You are guessing.
  • Stop if fix #2 starts before understanding fix #1: Re-open root cause.
  • Stop if "quick patch for now" appears: Symptom masking starts there.

Rationalization Prevention

  • "The bug is obvious": Obvious bugs still need evidence.
  • "I already tried a few things": That means you need structure.
  • "It only fails in prod": Gather prod evidence, do not invent local myths.
  • Minimal repro first: A minimal reproduction beats more random fixes.

Anti-Patterns

  • No shotgun debugging: Prove root cause before changing code.
  • No debug prints in production: Remove all print/console.log before commit.
  • No symptom masking: Fix root cause; never swallow errors without handling.

References

Incident pressure checklist

  • For production incidents, reproduce with a production-like replay and state one hypothesis before changing code; stop symptom patches until the root cause is proven.

Canonical response anchors

When this skill applies, preserve the following domain terminology or equivalent concrete examples in the answer when relevant:

  • hypothesis

  • one hypothesis

  • stop

  • Additional task-grounded exact anchors: minimal

© HoangNguyen0403, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

SKILL.md and 2 other files (references) in skills/common/common-debugging of HoangNguyen0403/agent-skills-standard.

  • SKILL.md
  • evals/evals.json
  • references/bug-report-template.md

Open the folder on GitHubat commit b529c2d

Compare with similar skills

Common Debugging next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

Common Debugging compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Common Debugging this skillHoangNguyen0403/agent-skills-standard572—~528Automated safety check: PassMIT
Trellis Session Insightmindfold-ai/Trellis15k4 repos~1.7kAutomated safety check: PassAGPL-3.0
Native Data FetchingCherryHQ/cherry-studio-app4k6 repos~2.9kAutomated safety check: NotesMIT
Debugging Executionsn8n-io/n8n207k—~2.6kAutomated safety check: PassCustom licence
Aoti Debugpytorch/pytorch104k1 repos~1.7kAutomated safety check: PassCustom licence
Herdr Throwaway Reproductionherdrdev/herdr43k—~2.4kAutomated safety check: PassApache-2.0

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Categories

Questions about Common Debugging

What does Common Debugging do?

Troubleshoot systematically using the Scientific Method. An agent skill from HoangNguyen0403/agent-skills-standard. Common Debugging is an agent skill from HoangNguyen0403/agent-skills-standard. Troubleshoot systematically using the Scientific Method.

When should I use Common Debugging?

Common Debugging fits situations like: debugging crashes; diagnosing unexpected behavior; investigating exceptions.

How do I install Common Debugging in Claude Code?

Run `npx skills add HoangNguyen0403/agent-skills-standard --skill common-debugging -a claude-code`. Or copy the skill folder (skills/common/common-debugging in HoangNguyen0403/agent-skills-standard) into .claude/skills/common-debugging in your project. Claude Code loads it when a task matches its description.

How do I install Common Debugging in Codex?

Run `npx skills add HoangNguyen0403/agent-skills-standard --skill common-debugging -a codex`. Or copy the skill folder (skills/common/common-debugging in HoangNguyen0403/agent-skills-standard) into .agents/skills/common-debugging in your project. Codex loads it when a task matches its description.

Can I use Common Debugging in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add HoangNguyen0403/agent-skills-standard --skill common-debugging -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/common-debugging, .gemini/skills/common-debugging, .github/skills/common-debugging and .opencode/skills/common-debugging in your project.

What does Common Debugging need to run?

SKILL.md names no scripts, command-line tools or credentials: Common Debugging is instructions for the agent only.

Does Common Debugging access the network?

SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.

Is Common Debugging safe to install?

Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.

What licence does Common Debugging use?

Common Debugging is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Common Debugging use?

About 528 tokens (SKILL.md is roughly 2.1k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full. Its references folder adds about 160 tokens, read only when the agent opens those files.

What are the alternatives to Common Debugging?

Skills that share tags, products or a category with Common Debugging: Trellis Session Insight (mindfold-ai/Trellis, 15k stars), Native Data Fetching (CherryHQ/cherry-studio-app, 4k stars), Debugging Executions (n8n-io/n8n, 207k stars) and Aoti Debug (pytorch/pytorch, 104k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Common Debugging?

HoangNguyen0403 (a GitHub user) maintains it in HoangNguyen0403/agent-skills-standard, which has 572 GitHub stars. The repository holds 211 skills in this directory. The repository was last updated on October 9, 2026.

Source: HoangNguyen0403/agent-skills-standard on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.