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Agent skill

Create Commit Message

by r3bl-org in r3bl-org/r3bl-open-core

Rules and guidelines for creating well-formatted commit messages, including 72-char limits, scope prefixes, and trailer blocks for tasks, PR closing, and attribution.

Apache-2.0Auto-check passedDevelopment

Install Create Commit Message

skills CLI
$ npx skills add r3bl-org/r3bl-open-core --skill create-commit-message -a claude-code

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

GitHub CLI
$ gh skill install r3bl-org/r3bl-open-core create-commit-message --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/r3bl-org/r3bl-open-core.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.agents/skills/create-commit-message .claude/skills/create-commit-message && 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
create-commit-message
GitHub stars
485
Token cost
~738 tokens
SKILL.md length
335 words
Files
1
Skills in repo
25
Repo updated
First seen
Licence
Apache-2.0

At a glance

Rules and guidelines for creating well-formatted commit messages, including 72-char limits, scope prefixes, and trailer blocks for tasks, PR closing, and attribution.

  • Works in 4 steps: Scope Prefix (Mandatory) → Formatting & Length Constraints → Trailer Block (Footers) → …
  • Tasks that involve Commit messages
  • SKILL.md covers 1. Scope Prefix (Mandatory), 2. Formatting & Length…, 3. Trailer Block (Footers) and Example, plus 1 more section
  • Calls git

What it does

Create Commit Message is an agent skill from r3bl-org/r3bl-open-core. Rules and guidelines for creating well-formatted commit messages, including 72-char limits, scope prefixes, and trailer blocks for tasks, PR closing, and attribution.

Its SKILL.md is about 740 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 Commit messages. The repository describes itself as: TUI framework and developer productivity apps in Rust 🦀. The licence is Apache-2.0.

When your agent uses it

  • Tasks that involve Commit messages

Example prompts

  • “Use the create-commit-message skill to rule and guidelines for creating well-formatted commit messages, including 72-char limits, scope prefixes…”
  • “/create-commit-message”

Workflow steps

4 steps, taken from the step headings in SKILL.md.

  1. Scope Prefix (Mandatory)
  2. Formatting & Length Constraints
  3. Trailer Block (Footers)
  4. Copying to Clipboard

What it can do on your machine

Read from SKILL.md and the folder at commit 89db352. 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

    Shell commands in SKILL.md call:

    • git

    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

Create Commit Message loads about 738 tokens when it runs. Until then it costs about 47 tokens; SKILL.md has 335 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~47
When it runs · the whole SKILL.md, loaded when a task matches
~738

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 r3bl-org/r3bl-open-core at commit 89db352, republished under its Apache-2.0 licence (© r3bl-org). 335 words, ~738 tokens.

Download SKILL.mdSave it as .claude/skills/create-commit-message/SKILL.md (or your agent's skills folder).
name
create-commit-message
description
Rules and guidelines for creating well-formatted commit messages, including 72-char limits, scope prefixes, and trailer blocks for tasks, PR closing, and attribution.

Create Commit Message Skill

You are an expert at writing clean, standard, and highly descriptive git commit messages. When asked to create a commit message, follow these exact guidelines:

1. Scope Prefix (Mandatory)

Start the subject line with a scope prefix in brackets, e.g., [tui], [core], [macro].

  • Always scan the recent git log history for the files you are modifying to determine the appropriate prefix. For example: git log --oneline -- <file_path> will show you what prefix is typically used for that component.

2. Formatting & Length Constraints

  • Subject Line: Keep the subject line (including the scope prefix) to a maximum of 72 characters.
  • Body: Wrap the commit message body to 72 characters per line.
  • Tone: Use the imperative mood in the subject line (e.g., "Add feature" not "Added feature").

3. Trailer Block (Footers)

All trailers MUST be grouped together in a single contiguous block at the absolute end of the commit message.

  • There must be exactly one blank line before the start of the trailer block.
  • There must be zero blank lines between the trailers themselves.
Required / Optional Trailers
  1. Task Tracking (Task:):
    • When a commit implements work from a task/*.md file, add a Task: trailer.
    • Do NOT include any directory prefixes (like task/ or task/done/) in the filenames.
    • For multiple tasks, list them on separate lines with a comma ending each line except the last.
      text
      Task: one.md,
      two.md
  2. Issue/PR Closing (Closes):
    • If the commit fully resolves a GitHub Issue or PR, include Closes #XXX.
  3. Attribution (Co-authored-by:):
    • If you are integrating work from another contributor (e.g., merging a community PR manually), include their attribution: Co-authored-by: Name <email@example.com>.

Example

text
[tui] Add DECCKM tracking and refactor parser state

This commit integrates the DECCKM (Cursor Key Mode) tracking logic from
PR #470, adding the missing `cursor_key_mode` field to the terminal
state and validating it with a new conformance integration test.

Task: prepare-v0.8.0-meta-task.md,
      pty-mux-bracketed-paste.md
Closes #470
Co-authored-by: Cecile Tonglet <cecile.tonglet@cecton.com>

4. Copying to Clipboard

If the user asks you to copy the commit message to the clipboard (e.g., they will handle the actual git commit step themselves), execute these exact steps:

  1. Write the commit message to /tmp/commit.msg.txt using the write_to_file tool.
  2. Execute the following in the run_command tool: fish -c "cat /tmp/commit.msg.txt | setclip"
  3. Execute the following in the run_command tool: rm /tmp/commit.msg.txt

© r3bl-org, Apache-2.0. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

Just SKILL.md in .agents/skills/create-commit-message of r3bl-org/r3bl-open-core.

Open the folder on GitHubat commit 89db352

Compare with similar skills

Create Commit Message 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.

Create Commit Message compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Create Commit Message this skillr3bl-org/r3bl-open-core485—~738Automated safety check: PassApache-2.0
Contextual Commit Messagesyamadashy/repomix29k1 repos~2.7kAutomated safety check: PassMIT
React Router Release Notes Prepremix-run/react-router57k—~1.1kAutomated safety check: PassMIT
Caveman Commitvishiri/fantasia-archive40913 repos~642Automated safety check: PassGPL-3.0
PR Finalize Reviewmicrosoft/garnet12k—~3.1kAutomated safety check: PassMIT
ToolJet Multi-Repo CommitToolJet/ToolJet41k—~1.3kAutomated safety check: PassAGPL-3.0

Similar skills

  • Contextual Commit Messages

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    29k GitHub starsUsed in 1 repo~2.7k tokens
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    12k GitHub stars~3.1k tokensUpdated today
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  • ToolJet Multi-Repo Commit

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Categories

Questions about Create Commit Message

What does Create Commit Message do?

Rules and guidelines for creating well-formatted commit messages, including 72-char limits, scope prefixes, and trailer blocks for tasks, PR closing, and attribution. Create Commit Message is an agent skill from r3bl-org/r3bl-open-core. Rules and guidelines for creating well-formatted commit messages, including 72-char limits, scope prefixes, and trailer blocks for tasks, PR closing, and attribution.

When should I use Create Commit Message?

Create Commit Message fits situations like: tasks that involve Commit messages.

How do I install Create Commit Message in Claude Code?

Run `npx skills add r3bl-org/r3bl-open-core --skill create-commit-message -a claude-code`. Or copy the skill folder (.agents/skills/create-commit-message in r3bl-org/r3bl-open-core) into .claude/skills/create-commit-message in your project. Claude Code loads it when a task matches its description.

How do I install Create Commit Message in Codex?

Run `npx skills add r3bl-org/r3bl-open-core --skill create-commit-message -a codex`. Or copy the skill folder (.agents/skills/create-commit-message in r3bl-org/r3bl-open-core) into .agents/skills/create-commit-message in your project. Codex loads it when a task matches its description.

Can I use Create Commit Message 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 r3bl-org/r3bl-open-core --skill create-commit-message -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/create-commit-message, .gemini/skills/create-commit-message, .github/skills/create-commit-message and .opencode/skills/create-commit-message in your project.

What does Create Commit Message need to run?

Going by SKILL.md and its folder, Create Commit Message needs the command-line tools its instructions call (git).

Does Create Commit Message 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 Create Commit Message 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 Create Commit Message use?

Create Commit Message is published under the Apache-2.0 licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Create Commit Message use?

About 738 tokens (SKILL.md is roughly 3k 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 Create Commit Message?

Skills that share tags, products or a category with Create Commit Message: Contextual Commit Messages (yamadashy/repomix, 29k stars), React Router Release Notes Prep (remix-run/react-router, 57k stars), Caveman Commit (vishiri/fantasia-archive, 409 stars) and PR Finalize Review (microsoft/garnet, 12k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Create Commit Message?

r3bl-org (a GitHub organization) maintains it in r3bl-org/r3bl-open-core, which has 485 GitHub stars. The repository holds 25 skills in this directory. The repository was last updated on October 8, 2026.

Source: r3bl-org/r3bl-open-core on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.