Go Concurrency Patterns
wshobson/agents
Reference patterns for goroutines, channels, sync primitives and context in Go, covering worker pools, pipelines, graceful shutdown and race-condition debugging.
Analyze and fix race conditions and concurrency bugs in async code.
Install Async Debugging
$ npx skills add revfactory/claude-code-harness --skill async-debugging -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install revfactory/claude-code-harness async-debugging --agent claude-codeProject scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).
$ git clone --depth 1 https://github.com/revfactory/claude-code-harness.git skills-src && mkdir -p .claude/skills && cp -r skills-src/experiments/results/case-002/harness/.claude/skills/async-debugging .claude/skills/async-debugging && rm -rf skills-srcUse ~/.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/
Install the "async-debugging" agent skill from https://github.com/revfactory/claude-code-harness/tree/main/experiments/results/case-002/harness/.claude/skills/async-debugging into .claude/skills/async-debugging/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "async-debugging", then confirm the skill loads.Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$skill-installer install https://github.com/revfactory/claude-code-harness/tree/main/experiments/results/case-002/harness/.claude/skills/async-debuggingType this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.
$ npx skills add revfactory/claude-code-harness --skill async-debugging -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install revfactory/claude-code-harness async-debugging --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/revfactory/claude-code-harness.git skills-src && mkdir -p .agents/skills && cp -r skills-src/experiments/results/case-002/harness/.claude/skills/async-debugging .agents/skills/async-debugging && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "async-debugging" agent skill from https://github.com/revfactory/claude-code-harness/tree/main/experiments/results/case-002/harness/.claude/skills/async-debugging into .agents/skills/async-debugging/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "async-debugging", then confirm the skill loads.Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add revfactory/claude-code-harness --skill async-debugging -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install revfactory/claude-code-harness async-debugging --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/revfactory/claude-code-harness.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/experiments/results/case-002/harness/.claude/skills/async-debugging .cursor/skills/async-debugging && rm -rf skills-srcUse ~/.cursor/skills/ instead of .cursor/skills for a personal install.
Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/
Install the "async-debugging" agent skill from https://github.com/revfactory/claude-code-harness/tree/main/experiments/results/case-002/harness/.claude/skills/async-debugging into .cursor/skills/async-debugging/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "async-debugging", then confirm the skill loads.Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gemini skills install https://github.com/revfactory/claude-code-harness.git --path experiments/results/case-002/harness/.claude/skills/async-debugging--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.
$ npx skills add revfactory/claude-code-harness --skill async-debugging -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install revfactory/claude-code-harness async-debugging --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/revfactory/claude-code-harness.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/experiments/results/case-002/harness/.claude/skills/async-debugging .gemini/skills/async-debugging && rm -rf skills-srcUse ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.
Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/
Install the "async-debugging" agent skill from https://github.com/revfactory/claude-code-harness/tree/main/experiments/results/case-002/harness/.claude/skills/async-debugging into .gemini/skills/async-debugging/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "async-debugging", then confirm the skill loads.Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gh skill install revfactory/claude-code-harness async-debuggingInstalls for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).
$ npx skills add revfactory/claude-code-harness --skill async-debugging -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/revfactory/claude-code-harness.git skills-src && mkdir -p .github/skills && cp -r skills-src/experiments/results/case-002/harness/.claude/skills/async-debugging .github/skills/async-debugging && rm -rf skills-srcUse ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.
GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/
Install the "async-debugging" agent skill from https://github.com/revfactory/claude-code-harness/tree/main/experiments/results/case-002/harness/.claude/skills/async-debugging into .github/skills/async-debugging/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "async-debugging", then confirm the skill loads.GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add revfactory/claude-code-harness --skill async-debugging -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install revfactory/claude-code-harness async-debugging --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/revfactory/claude-code-harness.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/experiments/results/case-002/harness/.claude/skills/async-debugging .opencode/skills/async-debugging && rm -rf skills-srcUse ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.
OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/
Install the "async-debugging" agent skill from https://github.com/revfactory/claude-code-harness/tree/main/experiments/results/case-002/harness/.claude/skills/async-debugging into .opencode/skills/async-debugging/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "async-debugging", then confirm the skill loads.OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
Facts
- Skill name
async-debugging- GitHub stars
- 120
- Token cost
- ~204 tokens
- SKILL.md length
- 102 words
- Files
- 2 (incl. references)
- Skills in repo
- 15
- Repo updated
- First seen
- Licence
- None found
At a glance
Analyze and fix race conditions and concurrency bugs in async code.
- Works in 4 steps: 식별: 코드에서 공유 상태에 대한 비동기 접근을 모두 찾기 → 시나리오 도출: 어떤 타이밍에 문제가 발생하는지 시퀀스 작성 → 영향 평가: 각 버그의 심각도와 발생 가능성 평가 → …
- Debugging async bugs
- SKILL.md covers 버그 분석 워크플로우, 수정 원칙 and 수정 전 반드시
- Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
What it does
Async Debugging is an agent skill from revfactory/claude-code-harness. Analyze and fix race conditions and concurrency bugs in async code. Use when debugging async bugs, fixing race conditions, resolving concurrency issues, or when shared state is accessed by multiple async operations.
Its SKILL.md is about 200 tokens, which your agent loads only when the skill is triggered. The skill folder holds 2 other files, including reference files (for example `references/patterns.md`).
It sits in Development, covering Async programming and Debugging.
When your agent uses it
- Debugging async bugs
- Fixing race conditions
- Resolving concurrency issues
- Shared state is accessed by multiple async operations
Example prompts
- “/async-debugging”
Workflow steps
4 steps, taken from the first numbered list in SKILL.md.
- 식별: 코드에서 공유 상태에 대한 비동기 접근을 모두 찾기
- 시나리오 도출: 어떤 타이밍에 문제가 발생하는지 시퀀스 작성
- 영향 평가: 각 버그의 심각도와 발생 가능성 평가
- 문서화: bug-analysis.md에 분석 결과 기록
What it can do on your machine
Read from SKILL.md and the folder at commit 267005c. 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
Async Debugging loads about 204 tokens when it runs, and up to ~735 if it reads all its reference files. Until then it costs about 58 tokens; SKILL.md has 102 words of instructions outside code blocks.
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
Without a licence we can't republish the file, so here is its outline and opening line. It has 102 words (~204 tokens).
- name
- async-debugging
Files
SKILL.md and 1 other file (references) in experiments/results/case-002/harness/.claude/skills/async-debugging of revfactory/claude-code-harness.
- SKILL.md
- references/patterns.md
Open the folder on GitHubat commit 267005c
Compare with similar skills
Async 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.
| Skill | Stars | Used in | Tokens | Auto-check | Licence | Repo updated |
|---|---|---|---|---|---|---|
| Async Debugging this skillrevfactory/claude-code-harness | 120 | — | ~204 | Automated safety check: Pass | None | |
| Go Concurrency Patternswshobson/agents | 40k | 8 repos | ~693 | Automated safety check: Pass | MIT | |
| Julessanjay3290/ai-skills | 430 | 1 repos | ~2.1k | Automated safety check: Pass | Apache-2.0 | |
| Frappe Errors ClientscriptsImpertio-Studio/Frappe_Claude_Skill_Package | 187 | — | ~2.4k | Automated safety check: Pass | MIT | |
| DebuggerTheDecipherist/claude-code-mastery-project-starter-kit | 338 | — | ~669 | Automated safety check: Notes | MIT | |
| Rust Debuggingmohitmishra786/low-level-dev-skills | 253 | — | ~1.6k | Automated safety check: Pass | MIT |
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sanjay3290/ai-skills
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Frappe Errors Clientscripts
Impertio-Studio/Frappe_Claude_Skill_Package
A skill your agent uses when debugging or preventing errors in Frappe Client Scripts.
Debugger
TheDecipherist/claude-code-mastery-project-starter-kit
Diagnose failures by root cause, not symptom. An agent skill from TheDecipherist/claude-code-mastery-project-starter-kit.
Rust Debugging
mohitmishra786/low-level-dev-skills
Rust debugging skill for systems programming. An agent skill from mohitmishra786/low-level-dev-skills.
Replay Oriented Instrumentation
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Instruments programs to record execution information for deterministic replay debugging.
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Related
Categories
Questions about Async Debugging
What does Async Debugging do?
Analyze and fix race conditions and concurrency bugs in async code. Async Debugging is an agent skill from revfactory/claude-code-harness. Analyze and fix race conditions and concurrency bugs in async code.
When should I use Async Debugging?
Async Debugging fits situations like: debugging async bugs; fixing race conditions; resolving concurrency issues; shared state is accessed by multiple async operations.
How do I install Async Debugging in Claude Code?
Run `npx skills add revfactory/claude-code-harness --skill async-debugging -a claude-code`. Or copy the skill folder (experiments/results/case-002/harness/.claude/skills/async-debugging in revfactory/claude-code-harness) into .claude/skills/async-debugging in your project. Claude Code loads it when a task matches its description.
How do I install Async Debugging in Codex?
Run `npx skills add revfactory/claude-code-harness --skill async-debugging -a codex`. Or copy the skill folder (experiments/results/case-002/harness/.claude/skills/async-debugging in revfactory/claude-code-harness) into .agents/skills/async-debugging in your project. Codex loads it when a task matches its description.
Can I use Async 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 revfactory/claude-code-harness --skill async-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/async-debugging, .gemini/skills/async-debugging, .github/skills/async-debugging and .opencode/skills/async-debugging in your project.
What does Async Debugging need to run?
SKILL.md names no scripts, command-line tools or credentials: Async Debugging is instructions for the agent only.
Does Async 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 Async 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 Async Debugging use?
No licence was found for Async Debugging or its repository. Without one, default copyright applies: ask the author before reusing or redistributing it.
How many tokens does Async Debugging use?
About 204 tokens (SKILL.md is roughly 816 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 531 tokens, read only when the agent opens those files.
What are the alternatives to Async Debugging?
Skills that share tags, products or a category with Async Debugging: Go Concurrency Patterns (wshobson/agents, 40k stars), Jules (sanjay3290/ai-skills, 430 stars), Frappe Errors Clientscripts (Impertio-Studio/Frappe_Claude_Skill_Package, 187 stars) and Debugger (TheDecipherist/claude-code-mastery-project-starter-kit, 338 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Async Debugging?
revfactory (a GitHub user) maintains it in revfactory/claude-code-harness, which has 120 GitHub stars. The repository holds 15 skills in this directory. The repository was last updated on March 6, 2026.
Source: revfactory/claude-code-harness on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.