node-client-sdk: v4.0.0

4.0.0 (2026-08-04)

⚠ BREAKING CHANGES

• identify() resolves an identify result and no longer throws
• The on-disk persistent cache format changed; v3 cache data will not be read by v4 and the anonymous key will be regenerated on first identify.

BREAKING-CHANGE

• The package name changed from launchdarkly-node-client-sdk to @launchdarkly/node-client-sdk. (4116d2f)

Features

• identify() resolves an identify result and no longer throws (4116d2f)
• Add useMobileKey option to NodeOptions (4116d2f)
• Evaluation, identify, and track hooks (4116d2f)
• Inspector support for flag and context state (4116d2f)
• Plugin extension surface with applicationInfo metadata (4116d2f)
• Runtime connection-mode control via setConnectionMode (4116d2f)
• Storage configuration with file-backed default and custom-implementation override (4116d2f)
• support client side secure mode with client side id (4116d2f)
• support wrapper header (4116d2f)
• TLS configuration via tlsParams (4116d2f)