Release v0.13.7

CLI Amend Mode - AI-powered commit message regeneration for --amend

Added

gcop-rs commit --amend

• New --amend flag on the commit command regenerates the most recent commit's message using AI
• Reads the HEAD commit's diff via get_commit_diff("HEAD"); if additional staged changes exist, merges both diffs before sending to the LLM
• Executes git commit --amend -m <message> on accept
• Works with all existing modes: --dry-run, --json, -y, interactive menu (Accept / Edit / Retry / Quit)

commit_amend() Trait Method

• New commit_amend(&self, message: &str) method on GitOperations trait
• Uses git CLI (not git2) to preserve GPG signing and hook support

Changed

Diff Acquisition Refactor

• Extracted get_diff(repo, amend) helper to unify amend/normal diff logic across interactive and JSON code paths, eliminating duplication

Validation

• --amend --split is rejected with a clear error message
• --amend on empty repositories (no commits) returns early with guidance

Upgrade

# Homebrew
brew upgrade gcop-rs

# Cargo
cargo install gcop-rs

# pip
pip install --upgrade gcop-rs