JS SDK

What's Changed

• fix(vercel): parse token usage and ttft for streamObject by @hassiebp in https://github.com/langfuse/langfuse-js/pull/401

Full Changelog: https://github.com/langfuse/langfuse-js/compare/v3.25.1...v3.25.2

What's Changed

• chore(langchain): bump peerdep to <0.4.0 by @hassiebp in https://github.com/langfuse/langfuse-js/pull/398

Full Changelog: https://github.com/langfuse/langfuse-js/compare/v3.25.0...v3.25.1

What's Changed

• feat(langchain): link langfuse prompts to langchain executions by @hassiebp in https://github.com/langfuse/langfuse-js/pull/394

Full Changelog: https://github.com/langfuse/langfuse-js/compare/v3.24.0...v3.25.0

What's Changed

• feat: truncate large event payloads by @hassiebp in https://github.com/langfuse/langfuse-js/pull/391

Full Changelog: https://github.com/langfuse/langfuse-js/compare/v3.23.3...v3.24.0

What's Changed

• fix(vercel): additional debug logs by @hassiebp in https://github.com/langfuse/langfuse-js/pull/390

Full Changelog: https://github.com/langfuse/langfuse-js/compare/v3.23.2...v3.23.3

What's Changed

• fix(vercel): trace attributes and remove non-ai spans by @hassiebp in https://github.com/langfuse/langfuse-js/pull/388

Full Changelog: https://github.com/langfuse/langfuse-js/compare/v3.23.1...v3.23.2

What's Changed

• chore(deps): bump micromatch from 4.0.5 to 4.0.8 by @dependabot in https://github.com/langfuse/langfuse-js/pull/369
• feat: expand error messages to non ingestion API by @maxdeichmann in https://github.com/langfuse/langfuse-js/pull/384
• chore(deps-dev): bump rollup from 4.20.0 to 4.21.2 by @dependabot in https://github.com/langfuse/langfuse-js/pull/371

Full Changelog: https://github.com/langfuse/langfuse-js/compare/v3.23.0...v3.23.1

What's Changed

• feat(prompts): disable caching of prompt when cacheTtlSeconds: 0 by @marcklingen in https://github.com/langfuse/langfuse-js/pull/382
  • Docs: https://langfuse.com/docs/prompts/get-started#disable-caching

Full Changelog: https://github.com/langfuse/langfuse-js/compare/v3.22.0...v3.23.0

What's Changed

• feat(vercel): track time-to-first-token by @hassiebp in https://github.com/langfuse/langfuse-js/pull/379

Full Changelog: https://github.com/langfuse/langfuse-js/compare/v3.20.0...v3.21.0

What's Changed

• feat(prompts): return stale prompt version and fetch refreshed prompt in the background, instead of waiting for the updated prompt by @marcklingen in https://github.com/langfuse/langfuse-js/pull/373
  • See docs for details: https://langfuse.com/docs/prompts/get-started#performance
• feat(prompts): Added tags to returned prompt by @nishantkyal in https://github.com/langfuse/langfuse-js/pull/316
• fix(types): prompt tags attribute by @marcklingen in https://github.com/langfuse/langfuse-js/pull/372
• chore(deps-dev): bump tsx from 4.16.2 to 4.17.0 by @dependabot in https://github.com/langfuse/langfuse-js/pull/344
• chore(deps-dev): bump @types/node from 22.1.0 to 22.2.0 by @dependabot in https://github.com/langfuse/langfuse-js/pull/345
• chore(deps-dev): bump openai from 4.55.1 to 4.55.4 by @dependabot in https://github.com/langfuse/langfuse-js/pull/348
• chore(deps-dev): bump @ai-sdk/openai from 0.0.40 to 0.0.44 by @dependabot in https://github.com/langfuse/langfuse-js/pull/347
• chore(deps): bump axios from 1.7.2 to 1.7.4 by @dependabot in https://github.com/langfuse/langfuse-js/pull/356
• chore(deps-dev): bump @ai-sdk/openai from 0.0.44 to 0.0.48 by @dependabot in https://github.com/langfuse/langfuse-js/pull/354
• chore(deps-dev): bump eslint-plugin-react from 7.34.3 to 7.35.0 by @dependabot in https://github.com/langfuse/langfuse-js/pull/351
• chore(deps-dev): bump @babel/core from 7.24.7 to 7.25.2 by @dependabot in https://github.com/langfuse/langfuse-js/pull/349

New Contributors

• @nishantkyal made their first contribution in https://github.com/langfuse/langfuse-js/pull/316

Full Changelog: https://github.com/langfuse/langfuse-js/compare/v3.19.0...v3.20.0

What's Changed

• feat: add timeouts for fetching prompts by @maxdeichmann in https://github.com/langfuse/langfuse-js/pull/342
• chore(deps-dev): bump lerna from 8.1.6 to 8.1.8 by @dependabot in https://github.com/langfuse/langfuse-js/pull/334
• chore(deps-dev): bump rollup from 4.19.0 to 4.20.0 by @dependabot in https://github.com/langfuse/langfuse-js/pull/333
• chore(deps-dev): bump husky from 9.0.11 to 9.1.4 by @dependabot in https://github.com/langfuse/langfuse-js/pull/331
• chore(deps-dev): bump openapi-typescript from 7.0.2 to 7.3.0 by @dependabot in https://github.com/langfuse/langfuse-js/pull/328
• chore(deps-dev): bump ai from 3.2.44 to 3.3.5 by @dependabot in https://github.com/langfuse/langfuse-js/pull/343

Full Changelog: https://github.com/langfuse/langfuse-js/compare/v3.18.0...v3.19.0

What's Changed

• feat: add support for usage_metadata in langfuse-langchain callback by @hassiebp in https://github.com/langfuse/langfuse-js/pull/335
• feat(openai): add response_format to metadata by @hassiebp in https://github.com/langfuse/langfuse-js/pull/340
• fix: add test convering fetching non-prod prompt via version by @marcklingen in https://github.com/langfuse/langfuse-js/pull/338
• chore(deps-dev): bump @types/node from 20.14.10 to 22.1.0 by @dependabot in https://github.com/langfuse/langfuse-js/pull/330
• chore(deps-dev): bump @babel/preset-env from 7.24.7 to 7.25.3 by @dependabot in https://github.com/langfuse/langfuse-js/pull/325
• chore(deps-dev): bump ts-jest from 29.1.5 to 29.2.4 by @dependabot in https://github.com/langfuse/langfuse-js/pull/327
• chore(deps-dev): bump typedoc from 0.26.4 to 0.26.5 by @dependabot in https://github.com/langfuse/langfuse-js/pull/311
• chore: add default trace timestamps by @hassiebp in https://github.com/langfuse/langfuse-js/pull/337

Full Changelog: https://github.com/langfuse/langfuse-js/compare/v3.17.0...v3.18.0

What's Changed

• feat(vercel-ai): add integration for vercel-ai-sdk telemetry by @hassiebp in https://github.com/langfuse/langfuse-js/pull/329

• chore(deps-dev): bump typedoc from 0.26.2 to 0.26.4 by @dependabot in https://github.com/langfuse/langfuse-js/pull/294

• chore(ci): fix pnpm and node version by @marcklingen in https://github.com/langfuse/langfuse-js/pull/308

• chore: update api types by @marcklingen in https://github.com/langfuse/langfuse-js/pull/307

• chore(deps-dev): bump eslint-plugin-prettier from 5.1.3 to 5.2.1 by @dependabot in https://github.com/langfuse/langfuse-js/pull/310

• chore(deps-dev): bump rollup from 4.18.0 to 4.19.0 by @dependabot in https://github.com/langfuse/langfuse-js/pull/309

• chore(deps-dev): bump tsx from 4.15.7 to 4.16.2 by @dependabot in https://github.com/langfuse/langfuse-js/pull/300

• chore(deps): bump langchain from 0.2.6 to 0.2.10 by @dependabot in https://github.com/langfuse/langfuse-js/pull/303

Full Changelog: https://github.com/langfuse/langfuse-js/compare/v3.16.2...v3.17.0

What's Changed

• feat(prompts): add max_retries option by @hassiebp in https://github.com/langfuse/langfuse-js/pull/302
• fix(openai): circular references when passing parent by @hassiebp in https://github.com/langfuse/langfuse-js/pull/305

Full Changelog: https://github.com/langfuse/langfuse-js/compare/v3.16.1...v3.16.2

What's Changed

• feat(prompts): add fallback to getPrompts by @hassiebp in https://github.com/langfuse/langfuse-js/pull/295
• feat(scores): support different score types and referencing configs by @marliessophie in https://github.com/langfuse/langfuse-js/pull/292
• fix: silently fail on openai assistants API by @hassiebp in https://github.com/langfuse/langfuse-js/pull/290
• chore(deps-dev): bump lerna from 8.1.3 to 8.1.6 by @dependabot in https://github.com/langfuse/langfuse-js/pull/285
• chore(deps): bump @langchain/community from 0.2.13 to 0.2.17 by @dependabot in https://github.com/langfuse/langfuse-js/pull/282
• chore(deps-dev): bump typescript from 5.4.5 to 5.5.3 by @dependabot in https://github.com/langfuse/langfuse-js/pull/281

New Contributors

• @marliessophie made their first contribution in https://github.com/langfuse/langfuse-js/pull/292

Full Changelog: https://github.com/langfuse/langfuse-js/compare/v3.14.0...v3.15.0

What's Changed

• feat: add fetch methods for observations and traces by @marcklingen in https://github.com/langfuse/langfuse-js/pull/284
  • fetchTrace
  • fetchTraces
  • fetchObservation
  • fetchObservations
• chore: add error logs for non-serializable bodies by @hassiebp in https://github.com/langfuse/langfuse-js/pull/283

Full Changelog: https://github.com/langfuse/langfuse-js/compare/v3.13.0...v3.14.0

What's Changed

• feat(datasets): v2 api by @marcklingen in https://github.com/langfuse/langfuse-js/pull/278
  • paginated dataset.items used by getDataset() to allow for large datasets to be fetched from api
  • add getDatasetRuns()
• chore(deps): bump @langchain/community from 0.2.12 to 0.2.13 by @dependabot in https://github.com/langfuse/langfuse-js/pull/268
• chore(deps): bump ws from 7.5.9 to 7.5.10 in /examples/example-web by @dependabot in https://github.com/langfuse/langfuse-js/pull/253
• chore(deps): bump langchain from 0.2.5 to 0.2.6 by @dependabot in https://github.com/langfuse/langfuse-js/pull/267
• chore(deps-dev): bump @types/node from 20.14.6 to 20.14.8 by @dependabot in https://github.com/langfuse/langfuse-js/pull/266
• chore(deps-dev): bump tsx from 4.15.6 to 4.15.7 by @dependabot in https://github.com/langfuse/langfuse-js/pull/264
• chore(deps-dev): bump typedoc from 0.25.13 to 0.26.2 by @dependabot in https://github.com/langfuse/langfuse-js/pull/265
• chore: regenerate api spec after upgrade of openapi-typescript (v7) by @marcklingen in https://github.com/langfuse/langfuse-js/pull/279

Full Changelog: https://github.com/langfuse/langfuse-js/compare/v3.12.2...v3.13.0

What's Changed

• fix: streamed function/tool calls by @hassiebp in https://github.com/langfuse/langfuse-js/pull/262

• chore(deps-dev): bump eslint-plugin-react from 7.34.2 to 7.34.3 by @dependabot in https://github.com/langfuse/langfuse-js/pull/261

• chore(deps-dev): bump openapi-typescript from 6.7.6 to 7.0.0 by @dependabot in https://github.com/langfuse/langfuse-js/pull/259

• chore(deps-dev): bump @types/node from 20.14.5 to 20.14.6 by @dependabot in https://github.com/langfuse/langfuse-js/pull/260

Full Changelog: https://github.com/langfuse/langfuse-js/compare/v3.12.1...v3.12.2

What's Changed

• feat(prompts): add tags to api by @marcklingen in https://github.com/langfuse/langfuse-js/pull/220
• feat(traces): add sessionId filter for traces endpoint by @RichardKruemmel in https://github.com/langfuse/langfuse-js/pull/221
• fix: use langchain runName as trace name if provided by @4t8dd in https://github.com/langfuse/langfuse-js/pull/258
• chore(deps-dev): bump tsx from 4.10.2 to 4.11.2 by @dependabot in https://github.com/langfuse/langfuse-js/pull/219
• chore(deps-dev): bump @rollup/plugin-commonjs from 25.0.7 to 26.0.1 by @dependabot in https://github.com/langfuse/langfuse-js/pull/223
• chore(deps-dev): bump lerna from 8.1.2 to 8.1.3 by @dependabot in https://github.com/langfuse/langfuse-js/pull/207
• chore(deps-dev): bump dotenv-cli from 7.4.1 to 7.4.2 by @dependabot in https://github.com/langfuse/langfuse-js/pull/205
• chore(deps-dev): bump openapi-typescript from 6.7.5 to 6.7.6 by @dependabot in https://github.com/langfuse/langfuse-js/pull/214
• chore(deps-dev): bump ts-jest from 29.1.3 to 29.1.4 by @dependabot in https://github.com/langfuse/langfuse-js/pull/222
• chore(deps-dev): bump @babel/preset-typescript from 7.24.1 to 7.24.7 by @dependabot in https://github.com/langfuse/langfuse-js/pull/228
• chore(deps-dev): bump tslib from 2.6.2 to 2.6.3 by @dependabot in https://github.com/langfuse/langfuse-js/pull/225
• chore(deps-dev): bump @babel/preset-react from 7.24.1 to 7.24.7 by @dependabot in https://github.com/langfuse/langfuse-js/pull/226
• chore(deps-dev): bump @types/node from 20.12.12 to 20.14.2 by @dependabot in https://github.com/langfuse/langfuse-js/pull/224
• chore(deps-dev): bump prettier from 3.2.5 to 3.3.1 by @dependabot in https://github.com/langfuse/langfuse-js/pull/227
• chore(deps-dev): bump eslint-plugin-react from 7.34.1 to 7.34.2 by @dependabot in https://github.com/langfuse/langfuse-js/pull/234
• chore(deps): bump braces from 3.0.2 to 3.0.3 by @dependabot in https://github.com/langfuse/langfuse-js/pull/235
• chore(deps-dev): bump tsx from 4.11.2 to 4.15.2 by @dependabot in https://github.com/langfuse/langfuse-js/pull/233
• chore(deps-dev): bump rollup from 4.17.2 to 4.18.0 by @dependabot in https://github.com/langfuse/langfuse-js/pull/230
• chore(deps): bump axios from 1.6.8 to 1.7.2 by @dependabot in https://github.com/langfuse/langfuse-js/pull/232
• chore(deps): bump braces from 3.0.2 to 3.0.3 in /examples/example-web-nextjs by @dependabot in https://github.com/langfuse/langfuse-js/pull/236
• chore(deps-dev): bump rollup-plugin-dts from 6.1.0 to 6.1.1 by @dependabot in https://github.com/langfuse/langfuse-js/pull/231
• chore(deps-dev): bump prettier from 3.3.1 to 3.3.2 by @dependabot in https://github.com/langfuse/langfuse-js/pull/242
• chore(deps-dev): bump tsx from 4.15.2 to 4.15.5 by @dependabot in https://github.com/langfuse/langfuse-js/pull/246
• chore(deps-dev): bump @babel/core from 7.24.5 to 7.24.7 by @dependabot in https://github.com/langfuse/langfuse-js/pull/241
• chore(deps-dev): bump commander from 12.0.0 to 12.1.0 by @dependabot in https://github.com/langfuse/langfuse-js/pull/238
• chore(deps): bump langchain from 0.2.3 to 0.2.5 by @dependabot in https://github.com/langfuse/langfuse-js/pull/240
• chore(deps-dev): bump @babel/preset-env from 7.24.5 to 7.24.7 by @dependabot in https://github.com/langfuse/langfuse-js/pull/239
• chore(deps-dev): bump @types/node from 20.14.2 to 20.14.5 by @dependabot in https://github.com/langfuse/langfuse-js/pull/257
• chore(deps): bump ws from 8.16.0 to 8.17.1 by @dependabot in https://github.com/langfuse/langfuse-js/pull/254
• chore(deps): bump @langchain/community from 0.2.4 to 0.2.12 by @dependabot in https://github.com/langfuse/langfuse-js/pull/256
• chore(deps-dev): bump tsx from 4.15.5 to 4.15.6 by @dependabot in https://github.com/langfuse/langfuse-js/pull/250
• chore(deps-dev): bump ts-jest from 29.1.4 to 29.1.5 by @dependabot in https://github.com/langfuse/langfuse-js/pull/251

Full Changelog: https://github.com/langfuse/langfuse-js/compare/v3.11.2...v3.12.1

What's Changed

• chore: bumps langchain to ^0.2 by @hassiebp in https://github.com/langfuse/langfuse-js/pull/218
• fix(scores): score.source enum should contain ANNOTATION by @marcklingen in https://github.com/langfuse/langfuse-js/pull/216
• chore(deps-dev): bump @types/node from 20.12.7 to 20.12.12 by @dependabot in https://github.com/langfuse/langfuse-js/pull/202
• chore(deps): bump next from 13.5.4 to 14.1.1 in /examples/example-web-nextjs by @dependabot in https://github.com/langfuse/langfuse-js/pull/198
• chore(deps-dev): bump ts-jest from 29.1.2 to 29.1.3 by @dependabot in https://github.com/langfuse/langfuse-js/pull/212

Full Changelog: https://github.com/langfuse/langfuse-js/compare/v3.11.1...v3.11.2