Trellis Session Insight
mindfold-ai/Trellis
Reach into past AI conversation history through the trellis mem CLI.
Four-mantra debugging discipline — reproduce, trace the fail path, falsify the hypothesis, cross-reference every breadcrumb.
Install Debug Mantra
$ npx skills add thananon/9arm-skills --skill debug-mantra -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install thananon/9arm-skills debug-mantra --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/thananon/9arm-skills.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/engineering/debug-mantra .claude/skills/debug-mantra && 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 "debug-mantra" agent skill from https://github.com/thananon/9arm-skills/tree/main/skills/engineering/debug-mantra into .claude/skills/debug-mantra/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "debug-mantra", 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/thananon/9arm-skills/tree/main/skills/engineering/debug-mantraType 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 thananon/9arm-skills --skill debug-mantra -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install thananon/9arm-skills debug-mantra --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/thananon/9arm-skills.git skills-src && mkdir -p .agents/skills && cp -r skills-src/skills/engineering/debug-mantra .agents/skills/debug-mantra && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "debug-mantra" agent skill from https://github.com/thananon/9arm-skills/tree/main/skills/engineering/debug-mantra into .agents/skills/debug-mantra/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "debug-mantra", 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 thananon/9arm-skills --skill debug-mantra -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install thananon/9arm-skills debug-mantra --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/thananon/9arm-skills.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/skills/engineering/debug-mantra .cursor/skills/debug-mantra && 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 "debug-mantra" agent skill from https://github.com/thananon/9arm-skills/tree/main/skills/engineering/debug-mantra into .cursor/skills/debug-mantra/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "debug-mantra", 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/thananon/9arm-skills.git --path skills/engineering/debug-mantra--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 thananon/9arm-skills --skill debug-mantra -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install thananon/9arm-skills debug-mantra --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/thananon/9arm-skills.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/skills/engineering/debug-mantra .gemini/skills/debug-mantra && 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 "debug-mantra" agent skill from https://github.com/thananon/9arm-skills/tree/main/skills/engineering/debug-mantra into .gemini/skills/debug-mantra/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "debug-mantra", 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 thananon/9arm-skills debug-mantraInstalls 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 thananon/9arm-skills --skill debug-mantra -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/thananon/9arm-skills.git skills-src && mkdir -p .github/skills && cp -r skills-src/skills/engineering/debug-mantra .github/skills/debug-mantra && 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 "debug-mantra" agent skill from https://github.com/thananon/9arm-skills/tree/main/skills/engineering/debug-mantra into .github/skills/debug-mantra/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "debug-mantra", 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 thananon/9arm-skills --skill debug-mantra -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install thananon/9arm-skills debug-mantra --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/thananon/9arm-skills.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/skills/engineering/debug-mantra .opencode/skills/debug-mantra && 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 "debug-mantra" agent skill from https://github.com/thananon/9arm-skills/tree/main/skills/engineering/debug-mantra into .opencode/skills/debug-mantra/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "debug-mantra", 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
debug-mantra- GitHub stars
- 3.2k
- Token cost
- ~1.2k tokens
- SKILL.md length
- 652 words
- Files
- 1
- Skills in repo
- 6
- Repo updated
- First seen
- Licence
- None found
At a glance
Four-mantra debugging discipline — reproduce, trace the fail path, falsify the hypothesis, cross-reference every breadcrumb.
- Works in 4 steps: Reproduce reliably → Know the fail path → Falsify the hypothesis → …
- /debug-mantra and proactively whenever debugging starts — user reports a bug
- SKILL.md covers Recite this — verbatim, as the…, 1. Reproduce reliably, 2. Know the fail path and 3. Falsify the hypothesis, plus 2 more sections
- Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
What it does
Debug Mantra is an agent skill from thananon/9arm-skills. Four-mantra debugging discipline — reproduce, trace the fail path, falsify the hypothesis, cross-reference every breadcrumb. Recite the mantra block verbatim at the start of any debugging session, then apply the four steps in order before proposing any fix. Trigger on /debug-mantra and proactively whenever debugging starts — user reports a bug, says something is broken/throwing/failing, asks to debug/diagnose/investigate an issue, or pastes a stack trace or error log.
Its SKILL.md is about 1.2k tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.
It sits in Development, covering Debugging.
When your agent uses it
- /debug-mantra and proactively whenever debugging starts — user reports a bug
- Says something is broken/throwing/failing
- Asks to debug/diagnose/investigate an issue
- Pastes a stack trace
Example prompts
- “/debug-mantra”
Workflow steps
4 steps, taken from the step headings in SKILL.md.
- Reproduce reliably
- Know the fail path
- Falsify the hypothesis
- Every run is a breadcrumb
What it can do on your machine
Read from SKILL.md and the folder at commit a1fc303. 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
Debug Mantra loads about 1.2k tokens when it runs. Until then it costs about 121 tokens; SKILL.md has 652 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 652 words (~1,182 tokens).
“Four-step discipline for any debug session. Recite verbatim, then apply in order.”
- name
- debug-mantra
Files
Just SKILL.md in skills/engineering/debug-mantra of thananon/9arm-skills.
Open the folder on GitHubat commit a1fc303
Compare with similar skills
Debug Mantra 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 |
|---|---|---|---|---|---|---|
| Debug Mantra this skillthananon/9arm-skills | 3.2k | — | ~1.2k | Automated safety check: Pass | None | |
| Trellis Session Insightmindfold-ai/Trellis | 15k | 4 repos | ~1.7k | Automated safety check: Pass | AGPL-3.0 | |
| Native Data FetchingCherryHQ/cherry-studio-app | 4k | 6 repos | ~2.9k | Automated safety check: Notes | MIT | |
| Debugging Executionsn8n-io/n8n | 207k | — | ~2.6k | Automated safety check: Pass | Custom licence | |
| Aoti Debugpytorch/pytorch | 104k | 1 repos | ~1.7k | Automated safety check: Pass | Custom licence | |
| Herdr Throwaway Reproductionherdrdev/herdr | 43k | — | ~2.4k | Automated safety check: Pass | Apache-2.0 |
Similar skills
Native Data Fetching
CherryHQ/cherry-studio-app
A skill your agent uses when implementing or debugging ANY network request, API call, or data fetching.
- Official
Debugging Executions
n8n-io/n8n
Debug failed or wrong-output workflow executions using executions tools.
Aoti Debug
pytorch/pytorch
Debug AOTInductor (AOTI) errors and crashes. An agent skill from pytorch/pytorch.
Herdr Throwaway Reproduction
herdrdev/herdr
Runs a disposable, uniquely named Herdr session inside an existing one so runtime, pane, terminal or API bugs can be reproduced without touching the main session.
Systematic Debugging
ultralisp/ultralisp
A skill your agent uses when encountering any bug, test failure, or unexpected behavior, before proposing fixes
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Categories
Questions about Debug Mantra
What does Debug Mantra do?
Four-mantra debugging discipline — reproduce, trace the fail path, falsify the hypothesis, cross-reference every breadcrumb. Debug Mantra is an agent skill from thananon/9arm-skills. Four-mantra debugging discipline — reproduce, trace the fail path, falsify the hypothesis, cross-reference every breadcrumb.
When should I use Debug Mantra?
Debug Mantra fits situations like: /debug-mantra and proactively whenever debugging starts — user reports a bug; says something is broken/throwing/failing; asks to debug/diagnose/investigate an issue; pastes a stack trace.
How do I install Debug Mantra in Claude Code?
Run `npx skills add thananon/9arm-skills --skill debug-mantra -a claude-code`. Or copy the skill folder (skills/engineering/debug-mantra in thananon/9arm-skills) into .claude/skills/debug-mantra in your project. Claude Code loads it when a task matches its description.
How do I install Debug Mantra in Codex?
Run `npx skills add thananon/9arm-skills --skill debug-mantra -a codex`. Or copy the skill folder (skills/engineering/debug-mantra in thananon/9arm-skills) into .agents/skills/debug-mantra in your project. Codex loads it when a task matches its description.
Can I use Debug Mantra 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 thananon/9arm-skills --skill debug-mantra -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/debug-mantra, .gemini/skills/debug-mantra, .github/skills/debug-mantra and .opencode/skills/debug-mantra in your project.
What does Debug Mantra need to run?
SKILL.md names no scripts, command-line tools or credentials: Debug Mantra is instructions for the agent only.
Does Debug Mantra 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 Debug Mantra 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 Debug Mantra use?
No licence was found for Debug Mantra or its repository. Without one, default copyright applies: ask the author before reusing or redistributing it.
How many tokens does Debug Mantra use?
About 1.2k tokens (SKILL.md is roughly 4.7k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.
What are the alternatives to Debug Mantra?
Skills that share tags, products or a category with Debug Mantra: 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 Debug Mantra?
thananon (a GitHub user) maintains it in thananon/9arm-skills, which has 3,208 GitHub stars. The repository holds 6 skills in this directory. The repository was last updated on June 14, 2026.
Source: thananon/9arm-skills on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.