[FSSDK-12868] prepare for release 6.5.0 (#1167)

Author: raju-opti

CHANGELOG.md

@@ -5,6 +5,27 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/)
 and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.html).
 
+## [6.5.0] - July 8, 2026
+
+### New Features
+- **Local Holdouts**: Added support for Local Holdouts, enabling holdout experiments
+to be scoped to specific feature flag rules rather than applied globally.
+Local Holdouts let you measure the true incremental impact of individual features
+by holding out a subset of users from specific rollouts while still serving them other experiences.
+See [Holdouts docs](https://support.optimizely.com/hc/en-us/articles/38941939408269-Global-holdouts) for more information.
+
+### Changed
+- Refactor project config creation ([#1164](https://github.com/optimizely/javascript-sdk/pull/1164))
+- Replace deprecated url.parse() with the WHATWG URL in NodeRequestHandler ([#1161](https://github.com/optimizely/javascript-sdk/pull/1161))
+- Upgrade to uuid v13 ([#1159](https://github.com/optimizely/javascript-sdk/pull/1159))
+- Don't send ODP identify event for single identifier ([#1152](https://github.com/optimizely/javascript-sdk/pull/1152))
+
+### Bug Fixes
+- Use attribute id instead of key for CMAB prediction requests ([#1160](https://github.com/optimizely/javascript-sdk/pull/1160))
+- Normalize decision event campaign_id, variation_id, and entity_id ([#1158](https://github.com/optimizely/javascript-sdk/pull/1158))
+- Fix content-length header in NodeRequestHandler ([#1156](https://github.com/optimizely/javascript-sdk/pull/1156))
+
+
 ## [6.4.0] - May 7, 2026
 
 ### New Features

lib/utils/enums/index.ts

@@ -44,7 +44,7 @@ export const CONTROL_ATTRIBUTES = {
 export const JAVASCRIPT_CLIENT_ENGINE = 'javascript-sdk';
 export const NODE_CLIENT_ENGINE = 'node-sdk';
 export const REACT_NATIVE_JS_CLIENT_ENGINE = 'react-native-js-sdk';
-export const CLIENT_VERSION = '6.4.0';
+export const CLIENT_VERSION = '6.5.0';
 
 /*
  * Represents the source of a decision for feature management. When a feature

package-lock.json

@@ -1,6 +1,6 @@
 {
   "name": "@optimizely/optimizely-sdk",
-  "version": "6.4.0",
+  "version": "6.5.0",
   "description": "JavaScript SDK for Optimizely Feature Experimentation, Optimizely Full Stack (legacy), and Optimizely Rollouts",
   "main": "./dist/index.node.min.js",
   "browser": "./dist/index.browser.es.min.js",