JS SDK

Full Changelog: https://github.com/langfuse/langfuse-js/compare/v4.4.6...v4.4.7

What's Changed

• fix(openai): handle usage parsing for legacy completion usage by @hassiebp in https://github.com/langfuse/langfuse-js/pull/700

Full Changelog: https://github.com/langfuse/langfuse-js/compare/v4.4.3...v4.4.4

What's Changed

• feat(api): update API spec from langfuse/langfuse db01ff9 by @langfuse-bot in https://github.com/langfuse/langfuse-js/pull/691
• feat(api): update API spec from langfuse/langfuse e1f390d by @langfuse-bot in https://github.com/langfuse/langfuse-js/pull/692
• feat(api): update API spec from langfuse/langfuse 53b8ec8 by @langfuse-bot in https://github.com/langfuse/langfuse-js/pull/694
• feat(api): update API spec from langfuse/langfuse 34d42bc by @langfuse-bot in https://github.com/langfuse/langfuse-js/pull/695
• chore(deps-dev): bump ai from 5.0.23 to 5.0.52 by @dependabot[bot] in https://github.com/langfuse/langfuse-js/pull/689
• feat(api): update API spec from langfuse/langfuse ad16fa0 by @langfuse-bot in https://github.com/langfuse/langfuse-js/pull/696
• feat(api): update API spec from langfuse/langfuse cb16277 by @langfuse-bot in https://github.com/langfuse/langfuse-js/pull/699
• fix(tracing): adapt CallbackHandler for langchain v1.1.x (#697) by @hassiebp in https://github.com/langfuse/langfuse-js/pull/698

Full Changelog: https://github.com/langfuse/langfuse-js/compare/v4.4.2...v4.4.3

Full Changelog: https://github.com/langfuse/langfuse-js/compare/v4.4.1...v4.4.2

What's Changed

• feat(api): update API spec from langfuse/langfuse efe3532 by @langfuse-bot in https://github.com/langfuse/langfuse-js/pull/687
• feat(api): update API spec from langfuse/langfuse 25e6ad9 by @langfuse-bot in https://github.com/langfuse/langfuse-js/pull/688

Full Changelog: https://github.com/langfuse/langfuse-js/compare/v4.4.0...v4.4.1

What's Changed

• feat(core): add propagateAttributes function by @hassiebp in https://github.com/langfuse/langfuse-js/pull/676

Full Changelog: https://github.com/langfuse/langfuse-js/compare/v4.3.0...v4.4.0

What's Changed

• feat(langchain): add v1 support by @hassiebp in https://github.com/langfuse/langfuse-js/pull/680

Full Changelog: https://github.com/langfuse/langfuse-js/compare/v4.2.1...v4.3.0

What's Changed

• feat(api): update API spec from langfuse/langfuse 9b8868a by @langfuse-bot in https://github.com/langfuse/langfuse-js/pull/646
• chore: cache prettier output to make commits fast by @nimarb in https://github.com/langfuse/langfuse-js/pull/617
• feat(api): update API spec from langfuse/langfuse dee644d by @langfuse-bot in https://github.com/langfuse/langfuse-js/pull/658
• chore(deps-dev): bump happy-dom from 18.0.1 to 20.0.0 by @dependabot[bot] in https://github.com/langfuse/langfuse-js/pull/661
• feat(api): update API spec from langfuse/langfuse fa2979b by @langfuse-bot in https://github.com/langfuse/langfuse-js/pull/665
• chore(deps-dev): bump happy-dom from 20.0.0 to 20.0.2 by @dependabot[bot] in https://github.com/langfuse/langfuse-js/pull/667
• feat(api): update API spec from langfuse/langfuse f5e96a9 by @langfuse-bot in https://github.com/langfuse/langfuse-js/pull/671
• feat(api): update API spec from langfuse/langfuse 1ded68c by @langfuse-bot in https://github.com/langfuse/langfuse-js/pull/674
• feat(api): update API spec from langfuse/langfuse 62d2959 by @langfuse-bot in https://github.com/langfuse/langfuse-js/pull/675
• fix(experiments): set maxConcurrency default to 50 by @hassiebp in https://github.com/langfuse/langfuse-js/pull/677
• fix(ai-sdk): skip image processing for URLs by @hassiebp in https://github.com/langfuse/langfuse-js/pull/678
• feat(api): update API spec from langfuse/langfuse 258cc51 by @langfuse-bot in https://github.com/langfuse/langfuse-js/pull/679

Full Changelog: https://github.com/langfuse/langfuse-js/compare/v4.2.0...v4.2.1

What's Changed

• fix(message-placeholders): use plain text langchain format for placeh… by @nimarb in https://github.com/langfuse/langfuse-js/pull/616
• chore: add test for observation error level through langchain integration by @nimarb in https://github.com/langfuse/langfuse-js/pull/637
• feat(api): update API spec from langfuse/langfuse 0b68c41 by @langfuse-bot in https://github.com/langfuse/langfuse-js/pull/640
• fix(openai): parse response usage by @hassiebp in https://github.com/langfuse/langfuse-js/pull/641

New Contributors

• @langfuse-bot made their first contribution in https://github.com/langfuse/langfuse-js/pull/640

Full Changelog: https://github.com/langfuse/langfuse-js/compare/v4.1.0...v4.2.0

What's Changed

• feat(experiments): add experiment runner by @hassiebp in https://github.com/langfuse/langfuse-js/pull/604

Full Changelog: https://github.com/langfuse/langfuse-js/compare/v4.0.1...v4.1.0

What's Changed

• fix(otel): exporter version range by @hassiebp in https://github.com/langfuse/langfuse-js/pull/611

Full Changelog: https://github.com/langfuse/langfuse-js/compare/v4.0.0...v4.0.1

Full Changelog: https://github.com/langfuse/langfuse-js/compare/v4.1.0-alpha.1...v4.1.0-alpha.1

Full Changelog: https://github.com/langfuse/langfuse-js/compare/v4.0.0...v4.1.0-alpha.0

What's Changed

We’ve rebuilt the JS SDK on top of OpenTelemetry — unlocking better developer experience, robust context management, and seamless integrations with tools like OpenAI, LangChain, and more.

Please see here for the full SDK v4 launch post](https://github.com/orgs/langfuse/discussions/8403)

What's Changed

• chore(deps-dev): bump happy-dom from 14.12.3 to 18.0.1 by @dependabot[bot] in https://github.com/langfuse/langfuse-js/pull/585
• fix(tracing): change signature of updateActiveObservation by @hassiebp in https://github.com/langfuse/langfuse-js/pull/598

Full Changelog: https://github.com/langfuse/langfuse-js/compare/v4.0.0-beta.8...v4.0.0-beta.9

What's Changed

• feat(tracing): add observation types by @hassiebp in https://github.com/langfuse/langfuse-js/pull/594

Full Changelog: https://github.com/langfuse/langfuse-js/compare/v4.0.0-beta.7...v4.0.0-beta.8

What's Changed

• feat(vercel-ai-sdk): add media processing by @hassiebp in https://github.com/langfuse/langfuse-js/pull/593

Full Changelog: https://github.com/langfuse/langfuse-js/compare/v4.0.0-beta.6...v4.0.0-beta.7

What's Changed

• fix(serializer): do not serialize string primitives by @hassiebp in https://github.com/langfuse/langfuse-js/pull/591
• fix(processor): move to crypto.subtle by @hassiebp in https://github.com/langfuse/langfuse-js/pull/592

Full Changelog: https://github.com/langfuse/langfuse-js/compare/v4.0.0-beta.5...v4.0.0-beta.6