Agent skill

Mistake Notebook

by archibate in archibate/dotfiles-opencode

Skill to query and update a mistake notebook to memorize mistake.

No licenceAuto-check passed

Install Mistake Notebook

skills CLI
$ npx skills add archibate/dotfiles-opencode --skill mistake-notebook -a claude-code

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

GitHub CLI
$ gh skill install archibate/dotfiles-opencode mistake-notebook --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/archibate/dotfiles-opencode.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/mistake-notebook .claude/skills/mistake-notebook && 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
mistake-notebook
GitHub stars
108
Token cost
~1.2k tokens
SKILL.md length
442 words
Files
1
Skills in repo
34
Repo updated
First seen
Licence
None found

At a glance

Skill to query and update a mistake notebook to memorize mistake.

  • Works in 2 steps: Read Mistake Notebook for quick problem… → Append to Mistake Notebook when new…
  • SKILL.md covers Location, Triggers, Memorizing Problem Solutions and Mistake Solution Format, plus 1 more section
  • Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md

What it does

Mistake Notebook is an agent skill from archibate/dotfiles-opencode. Skill to query and update a mistake notebook to memorize mistake. Use this skill when: 1. Encountered a severe problem, needs to recall for historical problem solving experience 2. After fixed a severe mistake with a clear solution valuable to be recorded 3. User requested 'Do not make this mistake again'

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.

The repository describes itself as: Archibate's personal configuration for OpenCode.

Example prompts

  • “Do not make this mistake again”
  • “/mistake-notebook”

Workflow steps

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

  1. Read Mistake Notebook for quick problem -> solution look up.
  2. Append to Mistake Notebook when new problem being solved.

What it can do on your machine

Read from SKILL.md and the folder at commit 46b6b23. 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 (its code samples are markdown).

    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

Mistake Notebook loads about 1.2k tokens when it runs. Until then it costs about 81 tokens; SKILL.md has 442 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~81
When it runs · the whole SKILL.md, loaded when a task matches
~1.2k

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 442 words (~1,169 tokens).

“Mistake Notebook appear in two locations:”

— opening of SKILL.md by archibate
name
mistake-notebook

Read the full SKILL.md on GitHub

Files

Just SKILL.md in skills/mistake-notebook of archibate/dotfiles-opencode.

Open the folder on GitHubat commit 46b6b23

Compare with similar skills

Mistake Notebook 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.

Mistake Notebook compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Mistake Notebook this skillarchibate/dotfiles-opencode108—~1.2kAutomated safety check: PassNone
Jupyter Notebookmicrosoft/ai-agents-for-beginners77k—~1.1kAutomated safety check: PassMIT
Jupyter Notebookmicrosoft/ai-agents-for-beginners77k—~1.2kAutomated safety check: WarnMIT
Jupyter Notebookmicrosoft/ai-agents-for-beginners77k—~1.4kAutomated safety check: PassMIT
Jupyter Notebookmicrosoft/ai-agents-for-beginners77k8 repos~1kAutomated safety check: PassApache-2.0
Jupyter Notebookmicrosoft/ai-agents-for-beginners77k—~1.3kAutomated safety check: PassMIT

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Questions about Mistake Notebook

What does Mistake Notebook do?

Skill to query and update a mistake notebook to memorize mistake. Mistake Notebook is an agent skill from archibate/dotfiles-opencode. Skill to query and update a mistake notebook to memorize mistake.

How do I install Mistake Notebook in Claude Code?

Run `npx skills add archibate/dotfiles-opencode --skill mistake-notebook -a claude-code`. Or copy the skill folder (skills/mistake-notebook in archibate/dotfiles-opencode) into .claude/skills/mistake-notebook in your project. Claude Code loads it when a task matches its description.

How do I install Mistake Notebook in Codex?

Run `npx skills add archibate/dotfiles-opencode --skill mistake-notebook -a codex`. Or copy the skill folder (skills/mistake-notebook in archibate/dotfiles-opencode) into .agents/skills/mistake-notebook in your project. Codex loads it when a task matches its description.

Can I use Mistake Notebook 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 archibate/dotfiles-opencode --skill mistake-notebook -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/mistake-notebook, .gemini/skills/mistake-notebook, .github/skills/mistake-notebook and .opencode/skills/mistake-notebook in your project.

What does Mistake Notebook need to run?

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

Does Mistake Notebook 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 Mistake Notebook 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 Mistake Notebook use?

No licence was found for Mistake Notebook or its repository. Without one, default copyright applies: ask the author before reusing or redistributing it.

How many tokens does Mistake Notebook 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 Mistake Notebook?

Skills that share tags, products or a category with Mistake Notebook: Jupyter Notebook (microsoft/ai-agents-for-beginners, 77k stars), Jupyter Notebook (microsoft/ai-agents-for-beginners, 77k stars), Jupyter Notebook (microsoft/ai-agents-for-beginners, 77k stars) and Jupyter Notebook (microsoft/ai-agents-for-beginners, 77k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Mistake Notebook?

archibate (a GitHub user) maintains it in archibate/dotfiles-opencode, which has 108 GitHub stars. The repository holds 34 skills in this directory. The repository was last updated on April 29, 2026.

Source: archibate/dotfiles-opencode on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.