~anthropic/claude-sonnet-latest → A (6:4)

Side A meaningfully deduplicates substantial copy-pasted HTTP/oauth/harness code across four test files into shared modules (test.common, test.oauth), reducing maintenance burden and improving correctness consistency (timeouts, multi-user mock). Side B is a small, well-justified dead-code removal with an updated test, which is valuable but narrower in scope and lasting impact than A's broad de-duplication.