Systematic Debugging
ChrisWiles/claude-code-showcase
Applies a four-phase debugging routine that finds the root cause of a bug or failing test before any fix is written.
Runs a hypothesis-driven debugging loop for crashes, hangs and silent failures in any language, grounding every claim in runtime evidence and locking the fix with a test.
Install Hypothesis-Driven Debugging
$ npx skills add code-yeongyu/oh-my-openagent --skill debugging -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install code-yeongyu/oh-my-openagent 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/code-yeongyu/oh-my-openagent.git skills-src && mkdir -p .claude/skills && cp -r skills-src/packages/shared-skills/skills/debugging .claude/skills/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 "debugging" agent skill from https://github.com/code-yeongyu/oh-my-openagent/tree/dev/packages/shared-skills/skills/debugging into .claude/skills/debugging/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "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/code-yeongyu/oh-my-openagent/tree/dev/packages/shared-skills/skills/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 code-yeongyu/oh-my-openagent --skill debugging -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install code-yeongyu/oh-my-openagent debugging --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/code-yeongyu/oh-my-openagent.git skills-src && mkdir -p .agents/skills && cp -r skills-src/packages/shared-skills/skills/debugging .agents/skills/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 "debugging" agent skill from https://github.com/code-yeongyu/oh-my-openagent/tree/dev/packages/shared-skills/skills/debugging into .agents/skills/debugging/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "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 code-yeongyu/oh-my-openagent --skill debugging -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install code-yeongyu/oh-my-openagent debugging --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/code-yeongyu/oh-my-openagent.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/packages/shared-skills/skills/debugging .cursor/skills/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 "debugging" agent skill from https://github.com/code-yeongyu/oh-my-openagent/tree/dev/packages/shared-skills/skills/debugging into .cursor/skills/debugging/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "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/code-yeongyu/oh-my-openagent.git --path packages/shared-skills/skills/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 code-yeongyu/oh-my-openagent --skill debugging -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install code-yeongyu/oh-my-openagent debugging --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/code-yeongyu/oh-my-openagent.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/packages/shared-skills/skills/debugging .gemini/skills/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 "debugging" agent skill from https://github.com/code-yeongyu/oh-my-openagent/tree/dev/packages/shared-skills/skills/debugging into .gemini/skills/debugging/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "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 code-yeongyu/oh-my-openagent 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 code-yeongyu/oh-my-openagent --skill debugging -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/code-yeongyu/oh-my-openagent.git skills-src && mkdir -p .github/skills && cp -r skills-src/packages/shared-skills/skills/debugging .github/skills/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 "debugging" agent skill from https://github.com/code-yeongyu/oh-my-openagent/tree/dev/packages/shared-skills/skills/debugging into .github/skills/debugging/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "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 code-yeongyu/oh-my-openagent --skill 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 code-yeongyu/oh-my-openagent debugging --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/code-yeongyu/oh-my-openagent.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/packages/shared-skills/skills/debugging .opencode/skills/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 "debugging" agent skill from https://github.com/code-yeongyu/oh-my-openagent/tree/dev/packages/shared-skills/skills/debugging into .opencode/skills/debugging/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "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
debugging- GitHub stars
- 70k
- Token cost
- ~3.2k tokens
- SKILL.md length
- 1,506 words
- Files
- 26 (incl. references)
- Skills in repo
- 44
- Repo updated
- First seen
- Licence
- Custom licence
At a glance
Runs a hypothesis-driven debugging loop for crashes, hangs and silent failures in any language, grounding every claim in runtime evidence and locking the fix with a test.
- Works in 2 steps: Runtime truth beats code reading. Every… → Leave no trace. Debugging creates…
- Chasing a crash, hang or silent failure without an obvious cause
- SKILL.md covers Runtime Setup — MANDATORY…, Specialist Tools — ACTIVELY…, The Phase Loop — READ THE… and Non-Negotiable Safety Invariants, plus 1 more section
- Runs JavaScript scripts from its folder; calls git, poetry and node
What it does
The skill rests on two rules. Runtime truth beats code reading, so every claim about why a bug happens must come from observed state. And leave no trace, so every artifact created while debugging is journaled and removed before the task is done. The SKILL.md is deliberately small and works as a map; the knowledge sits in the references, which must be read before attaching a debugger or running commands from their domain.
The references include runtime guides for Python, Node, Go, Rust, native binaries and bundled JavaScript binaries, methodology files for setup, investigation, flaky triage, an oracle triple, escalation, fixing, QA and cleanup, and a dap.mjs script. The method escalates to orthogonal oracle angles and finishes by locking the fix with a failing test. It targets crashes, silent failures, hangs, wrong responses, memory leaks, async misbehavior and reverse engineering.
When your agent uses it
- Chasing a crash, hang or silent failure without an obvious cause
- Investigating a memory leak or async misbehavior
- Triaging a flaky test
- Needing the fix locked in with a failing test
Example prompts
- “The worker hangs after the third job and logs nothing. Debug it from runtime evidence.”
- “Find why this Node script returns the wrong response and lock the fix with a failing test first.”
- “Triage this flaky test and tell me what the evidence says.”
Workflow steps
2 steps, taken from the first numbered list in SKILL.md.
- Runtime truth beats code reading. Every claim about why the bug happens must come from observed state — never from a plausible story spun…
- Leave no trace. Debugging creates artifacts. Every artifact is journaled and removed before you call the task done.
What it can do on your machine
Read from SKILL.md and the folder at commit cbd7dd2. 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
Ships script files (JavaScript, from the files we listed), which the agent can run.
Shell commands in SKILL.md call:
gitpoetrynodegorgdeno
From the folder's file list and the shell code blocks in SKILL.md.
Network
No URLs in SKILL.md. Its commands use git, which can reach the network depending on how they are called.
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
Hypothesis-Driven Debugging loads about 3.2k tokens when it runs, and up to ~53k if it reads all its reference files. Until then it costs about 69 tokens; SKILL.md has 1,506 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
Its licence (Custom licence) doesn't allow us to republish the file, so here is its outline and opening line. It has 1,506 words (~3,168 tokens).
“You are a hypothesis-driven debugger. Two disciplines apply regardless of language, runtime, or whether you have source:”
- name
- debugging
Files
SKILL.md and 25 other files (references) in packages/shared-skills/skills/debugging of code-yeongyu/oh-my-openagent.
- SKILL.md
- references/methodology/00-setup.md
- references/methodology/02-investigate.md
- references/methodology/03-flaky-triage.md
- references/methodology/04-oracle-triple.md
- references/methodology/05-escalate.md
- references/methodology/06-fix.md
- references/methodology/08-qa.md
- references/methodology/09-cleanup.md
- references/methodology/partial-runtime-evidence.md
- references/runtimes/bundled-js-binary.md
- references/runtimes/go.md
- references/runtimes/native-binary.md
- references/runtimes/node.md
- references/runtimes/python.md
- references/runtimes/rust.md
- references/scripts/dap.mjs
- … and 9 more
Open the folder on GitHubat commit cbd7dd2
Used in 1 other repository
We found 1 copy of this SKILL.md (exact, near-identical or edited) in other folders. This page covers the copy in code-yeongyu/oh-my-openagent, which our catalogue first saw on October 7, 2026.
Compare with similar skills
Hypothesis-Driven 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 |
|---|---|---|---|---|---|---|
| Hypothesis-Driven Debugging this skillcode-yeongyu/oh-my-openagent | 70k | — | ~3.2k | Automated safety check: Pass | Custom licence | |
| Systematic DebuggingChrisWiles/claude-code-showcase | 6.1k | 3 repos | ~1.2k | Automated safety check: Pass | None | |
| Debugging and Error Recoveryaddyosmani/agent-skills | 102k | 1 repos | ~2.6k | Automated safety check: Pass | MIT | |
| Systematic Debugginged3dai/ed3d-plugins | 250 | 3 repos | ~2.4k | Automated safety check: Pass | None | |
| Debugging And Error Recoveryabashev/vfs-s3 | 106 | 6 repos | ~2.6k | Automated safety check: Pass | Apache-2.0 | |
| Veomni DebugByteDance-Seed/VeOmni | 2.2k | — | ~2.8k | Automated safety check: Pass | Apache-2.0 |
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Related
Categories
Questions about Hypothesis-Driven Debugging
What does Hypothesis-Driven Debugging do?
Runs a hypothesis-driven debugging loop for crashes, hangs and silent failures in any language, grounding every claim in runtime evidence and locking the fix with a test. The skill rests on two rules. Runtime truth beats code reading, so every claim about why a bug happens must come from observed state.
When should I use Hypothesis-Driven Debugging?
Hypothesis-Driven Debugging fits situations like: chasing a crash, hang or silent failure without an obvious cause; investigating a memory leak or async misbehavior; triaging a flaky test; needing the fix locked in with a failing test.
How do I install Hypothesis-Driven Debugging in Claude Code?
Run `npx skills add code-yeongyu/oh-my-openagent --skill debugging -a claude-code`. Or copy the skill folder (packages/shared-skills/skills/debugging in code-yeongyu/oh-my-openagent) into .claude/skills/debugging in your project. Claude Code loads it when a task matches its description.
How do I install Hypothesis-Driven Debugging in Codex?
Run `npx skills add code-yeongyu/oh-my-openagent --skill debugging -a codex`. Or copy the skill folder (packages/shared-skills/skills/debugging in code-yeongyu/oh-my-openagent) into .agents/skills/debugging in your project. Codex loads it when a task matches its description.
Can I use Hypothesis-Driven 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 code-yeongyu/oh-my-openagent --skill 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/debugging, .gemini/skills/debugging, .github/skills/debugging and .opencode/skills/debugging in your project.
What does Hypothesis-Driven Debugging need to run?
Going by SKILL.md and its folder, Hypothesis-Driven Debugging needs JavaScript for the scripts in its folder and the command-line tools its instructions call (git, poetry, node, go, rg and deno).
Does Hypothesis-Driven Debugging access the network?
SKILL.md contains no URLs. Its commands use git, which can reach the network depending on how they are called. This is read from the text; nothing was executed.
Is Hypothesis-Driven 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 Hypothesis-Driven Debugging use?
Hypothesis-Driven Debugging has a licence file (the repository's licence) that doesn't match a standard licence. Read it on GitHub before reusing the skill.
How many tokens does Hypothesis-Driven Debugging use?
About 3.2k tokens (SKILL.md is roughly 13k 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 50k tokens, read only when the agent opens those files.
What are the alternatives to Hypothesis-Driven Debugging?
Skills that share tags, products or a category with Hypothesis-Driven Debugging: Systematic Debugging (ChrisWiles/claude-code-showcase, 6.1k stars), Debugging and Error Recovery (addyosmani/agent-skills, 102k stars), Systematic Debugging (ed3dai/ed3d-plugins, 250 stars) and Debugging And Error Recovery (abashev/vfs-s3, 106 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Hypothesis-Driven Debugging?
code-yeongyu (a GitHub user) maintains it in code-yeongyu/oh-my-openagent, which has 69,850 GitHub stars. The repository holds 44 skills in this directory. The repository was last updated on October 7, 2026.
Source: code-yeongyu/oh-my-openagent on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.