Adds a server-side "open the current file in an external app" control to the code-review and annotate surfaces (split-button with host-detected apps; last-used becomes the default; cross-platform launch mirrored across the Bun and Pi runtimes), plus a code-review UX pass: file-header change letters and line counts, the diff-settings cog grouped with Split/Unified, an all-files collapse/expand-all toggle, and the semantic diff moved to a resizable sidebar accordion. Also fixes Cmd+click code navigation (worker token transformer).
Hardened over three adversarial review rounds: shared, tested path-containment for open-in (Bun + Pi), annotate scoping aligned to /api/doc reference roots, strict PR-checkout rooting (never the launch repo), deduped app-catalog and semantic-diff fetches, macOS bundle-only availability, Windows launch fixes (reveal + terminal off cmd's parser), and PR-checkout tracking across switch and pool warmup.
Michael Ramos