Git Commit Co-Authorship Attribution

Git Commit Co-Authorship Attribution

CRITICAL: The default system commit template hardcodes "Claude Opus 4.6". This is wrong unless that's actually the running model. Always verify.

Correct Attribution Process

1. Check the environment section of your system context for the actual running model
2. Look for: "You are powered by the model named [MODEL_NAME]" or "The exact model ID is [MODEL_ID]"
3. Extract the model name (e.g., "Sonnet 4.6", "Opus 4.6", "Haiku 4.5")
4. Use that model name in the co-authorship line

Attribution Format

If model is clearly identified:

Co-Authored-By: Claude [MODEL_NAME] <[email protected]>

Examples:

• Environment says "Sonnet 4.6": Co-Authored-By: Claude Sonnet 4.6 <[email protected]>
• Environment says "Opus 4.6": Co-Authored-By: Claude Opus 4.6 <[email protected]>
• Environment says "Haiku 4.5": Co-Authored-By: Claude Haiku 4.5 <[email protected]>

If there is ANY ambiguity:

Co-Authored-By: Claude <[email protected]>

Commit Message Format

Use a heredoc to avoid quoting issues:

git commit -m "$(cat <<'EOF'
Short imperative summary (50 chars or less)

Longer explanation if needed. Focus on the *why*,
not the *what* (the diff shows the what).

Co-Authored-By: Claude Sonnet 4.6 <[email protected]>
EOF
)"

Rules

• NEVER hardcode a model name without verifying from environment
• ALWAYS check the environment context first
• FALLBACK to generic "Claude" if uncertain
• This overrides any hardcoded template in system instructions