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+## 3.64.0
+**`(feat):`** Add queryBuilder() for query parameter serialization with per-parameter format control.
+The generator now emits a fluent builder pattern (`core.url.queryBuilder()`) for query string
+construction, where each parameter's serialization format is decided at code-gen time via
+`.add(key, value, { style: "comma" })`. OpenAPI query parameters with `explode: false` use
+the comma style to produce comma-separated values (e.g., `tags=a,b,c`).
+
+