Validated in a combined 4-PR batch worktree off release/v3.8.51 tip.
- Focused test: model-connid-prefix-normalization-6772.test.ts — part of batch's 60/60 node:test run
- typecheck:core, file-size, changelog-integrity, complexity, cognitive-complexity, check:docs-counts-sync — all OK
- Full-repo lint: 228 pre-existing dashboard react-hooks/* findings, unrelated to this diff
Thanks for closing this with production-log-shaped test cases — a deterministic upstream 404 loop from a duplicated routing segment is exactly the kind of defect that's easy to miss without real traffic shapes in the test suite.
