Upgrade librarian agent to use claude-sonnet-4 instead of claude-haiku-4-5 for improved code search and documentation capabilities. Closes #22 🤖 GENERATED WITH ASSISTANCE OF [OhMyOpenCode](https://github.com/code-yeongyu/oh-my-opencode)
Upgrade librarian agent to use claude-sonnet-4 instead of claude-haiku-4-5 for improved code search and documentation capabilities. Closes #22 🤖 GENERATED WITH ASSISTANCE OF [OhMyOpenCode](https://github.com/code-yeongyu/oh-my-opencode)