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SGLang deletes its experimental C++ radix tree and removes endpoints deprecated for two releases
sgl-project/sglang PR #40775, merged 2026-09-22, deletes the SGLANG_EXPERIMENTAL_CPP_RADIX_TREE implementation (-1,535 lines) because it no longer matched the prefix-cache interface and had no real CI coverage. PR #40795, merged 09-23, removes deprecated HTTP endpoints, env var aliases and API aliases that have been deprecated for at least two releases (-904 lines). If your deployment scripts set old env names or call legacy endpoints, check them before your next upgrade.
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