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_classify_error: covers all litellm error types (auth, not-found, rate-limit, service-unavailable, connection, timeout, bad-request), httpx connect and timeout errors, and generic fallback — using dynamically constructed fake exception classes to avoid importing litellm in tests. _check_local_server: covers success, retry-then-success, abort (SystemExit), and continue-anyway paths via monkeypatched httpx and questionary. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>