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name: commit-msg description: Use this skill when the user wants to generate a commit message. Contains workflow for branch checking, ticket ID extraction, and message formatting. allowed-tools: Bash(git branch *), Bash(git diff *), Read

Commit Message Generator

This skill generates commit messages with proper ticket ID extraction and formatting.

When to Use

• User runs /commit command (called by commit command)
• User asks to generate a commit message
• User needs help with commit message format

Workflow Steps

Step 1: Get Branch Name

Copygit branch --show-current

Step 2: Extract Ticket ID

Extract ticket ID from branch name using pattern CUS-\d+ (case insensitive).

Examples:

• CUS-1234/add-feature → CUS-1234
• feature/CUS-5678-fix-bug → CUS-5678
• cus-9999-update-docs → CUS-9999

Step 3: Analyze Changes

Review the staged changes:

Copygit diff --staged

Identify:

1. Type of change (new feature or bug fix)
2. Key files and components affected
3. Main purpose of the changes

Step 4: Determine Prefix

If ticket ID found → use CUS-XXXX:

If no ticket ID → determine prefix from diff analysis:

Analyze the nature of changes — don't ask the user.

Step 5: Generate Commit Message

Create a commit message following the strict format:

Format Rules

Prefix (one of):

• CUS-XXXX: — when ticket ID is available
• feat: — new functionality (only when no ticket ID)
• fix: — bug fix (only when no ticket ID)

Constraints:

• Maximum 50 characters total
• Single line (header only, no body)
• Lowercase description
• No period at the end
• Use abbreviations when needed: &, |, impl, auth, config, upd, del

Examples:

CopyCUS-1234: add user auth endpoint
CUS-5678: fix null check in payment service
feat: impl login & signup forms
fix: handle empty response in api client

Step 6: Return Message

Return the generated commit message to the caller.

File References

• Message Format — Detailed format specification
• Branch Conventions — Branch naming rules

Error Handling

• If git is not initialized, inform the user
• If detached HEAD state, use short commit hash as reference