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提供 JSON Patch 增量同步工具，基于 `fast-json-patch` 封装差异生成、校验与修订号管理。
提供 JSON Patch 增量同步工具，基于 fast-json-patch 封装差异生成、校验与修订号管理。
diff()：比较任意两个配置对象，生成 JSON Patch 操作集。createDelta()：配合当前修订号生成 ConfigDelta，便于传输。validateDelta()：在应用前对操作集做结构校验，遇到非法路径抛出 InvalidDeltaError。ensureBaseRevision() / applyDeltaToState()：结合 rev 规则管理状态演进，自动阻止并发写入冲突。applyDelta()：在保证操作有效的前提下返回新的不可变配置副本。所有 API 均保持无副作用，并附带 90%+ Vitest 覆盖率。