Teaches Claude to use the lite-bb (bb) CLI for Bitbucket operations instead of falling back to raw curl/REST API calls. Covers the full command surface: authentication, pull requests (create, review, merge, comment with inline code suggestions), repository management, code search, and raw API passthrough. Works with both Bitbucket Cloud and Bitbucket Server/Data Center. Automatically triggers when the git remote points to a Bitbucket instance.