Upgrade Plain Packages

1. Run the upgrade

uv run plain upgrade [package-names...]

This will show which packages were upgraded (e.g., plain-models: 0.1.0 -> 0.2.0).

2. Apply code changes for each upgraded package

For each package that was upgraded:

1. Run uv run plain changelog <package> --from <old-version> --to <new-version>
2. Read the "Upgrade instructions" section
3. If it says "No changes required", skip to next package
4. Apply any required code changes

3. Validate

1. Run uv run plain fix to fix formatting
2. Run uv run plain preflight to validate configuration

Guidelines

• Process ALL packages before testing
• DO NOT commit any changes
• Keep code changes minimal and focused
• Report any issues or conflicts encountered