feat: auto-move Unreleased content to version section on release

- Update release.py to automatically move [Unreleased] content to new version section
- Add proper date formatting for version entries
- Ensure CHANGELOG.md is included in version bump commits

Author: AndersonBY

scripts/release.py

@@ -12,6 +12,7 @@
 import re
 import subprocess
 import sys
+from datetime import datetime
 from pathlib import Path
 from typing import Tuple
 
@@ -51,6 +52,52 @@ def update_version(new_version: str) -> None:
         print(f"Updated __init__.py version to {new_version}")
 
 
+def update_changelog(new_version: str) -> None:
+    """Move Unreleased content to new version section in CHANGELOG.md"""
+    changelog_path = Path("CHANGELOG.md")
+    if not changelog_path.exists():
+        print("Warning: CHANGELOG.md not found, skipping changelog update")
+        return
+    
+    content = changelog_path.read_text(encoding="utf-8")
+    
+    # Check if version already exists
+    if f"## [{new_version}]" in content:
+        print(f"Version {new_version} already exists in CHANGELOG.md")
+        return
+    
+    # Find Unreleased section
+    import re
+    from datetime import datetime
+    
+    unreleased_match = re.search(r"(## \[Unreleased\])(.*?)(?=\n## \[|$)", content, re.DOTALL)
+    
+    if not unreleased_match:
+        print("Warning: [Unreleased] section not found in CHANGELOG.md")
+        return
+    
+    unreleased_content = unreleased_match.group(2).strip()
+    
+    if not unreleased_content:
+        print("Warning: [Unreleased] section is empty")
+        return
+    
+    # Get today's date
+    today = datetime.now().strftime("%Y-%m-%d")
+    
+    # Create new version section
+    new_section = f"\n\n## [{new_version}] - {today}\n\n{unreleased_content}"
+    
+    # Replace content: keep Unreleased header but empty its content
+    new_content = content.replace(
+        unreleased_match.group(0),
+        f"## [Unreleased]{new_section}"
+    )
+    
+    changelog_path.write_text(new_content, encoding="utf-8")
+    print(f"Updated CHANGELOG.md: moved Unreleased content to [{new_version}]")
+
+
 def parse_version(version: str) -> Tuple[int, int, int]:
     """Parse semantic version string"""
     try:
@@ -109,7 +156,7 @@ def create_and_push_tag(version: str, dry_run: bool = False) -> None:
 
     if not dry_run:
         # Commit version changes
-        run_command(["git", "add", "pyproject.toml", "src/repomix/__init__.py"])
+        run_command(["git", "add", "pyproject.toml", "src/repomix/__init__.py", "CHANGELOG.md"])
         run_command(["git", "commit", "-m", f"bump: version {version}"])
 
         # Create tag
@@ -162,8 +209,11 @@ def main():
 
         # Update version files
         update_version(new_version)
+        
+        # Update CHANGELOG
+        update_changelog(new_version)
     else:
-        print("[DRY RUN] Would update version files")
+        print("[DRY RUN] Would update version files and CHANGELOG")
 
     # Create and push tag
     create_and_push_tag(new_version, args.dry_run)