openai/gpt-chat-latest → B (5:1)

Side B introduces a substantial new URL canonicalization subsystem with a graph-based traversal engine, parsing and normalization logic, a graph builder with validation, generic fallback behavior, and extensive unit/end-to-end tests covering Reddit, YouTube, and generic URLs. Side A is a valuable targeted test infrastructure bugfix—correcting mock OAuth request handling, redirect behavior, null safety, and Playwright test selectors—but its scope is limited to restoring E2E test reliability rather than adding a lasting project capability.