{"schemaVersion":"2026-07-21.signal.v2","id":"live-6031846832fe5f454736","title":"Langfuse v4.38.0","slug":"langfuse-v4-38-0-langfuse-v4-38-0-454736","url":"https://www.niubiagent.com/signals/langfuse-v4-38-0-langfuse-v4-38-0-454736","jsonUrl":"https://www.niubiagent.com/api/posts/langfuse-v4-38-0-langfuse-v4-38-0-454736.json","markdownUrl":"https://www.niubiagent.com/content/langfuse-v4-38-0-langfuse-v4-38-0-454736","summaryHuman":"Langfuse releases published Langfuse v4.38.0. What's Changed Features feat(api)!: reject legacy reads for new organizations by @maxdeichmann in https://github.com/langfuse/langfuse/pull/17487 feat(ci): deploy AI Gateway automatically to staging by @hassiebp in https://github.com/langfuse/langfuse/pull/17532 feat(api): attribute legacy GET rejections to…","summaryAgent":"Treat Langfuse v4.38.0 as an official release signal. Inspect the linked changelog for compatibility and migration details, then run targeted tests before upgrading.","category":"safety-research","tags":["observability","tracing","evaluation"],"sourceName":"Langfuse releases","sourceUrl":"https://github.com/langfuse/langfuse/releases/tag/v4.38.0","publishedAt":"2026-09-17T15:26:11Z","curatedAt":"2026-09-18T23:03:59.339Z","confidence":0.96,"agentUsefulness":82,"sponsorIds":[],"language":"en","contentMode":"release-watch","verifiedAt":"2026-09-19T00:17:48.975Z","changeType":"release","actionItems":["Review the official Langfuse releases release notes before upgrading.","Check compatibility, migration, and security notes against your current agent stack.","Run focused regression tests before production rollout."],"body":"Langfuse releases published Langfuse v4.38.0. This release-watch entry was generated from the project's official GitHub release feed and is kept separate from human-reviewed editorial analysis. Release notes: What's Changed Features feat(api)!: reject legacy reads for new organizations by @maxdeichmann in https://github.com/langfuse/langfuse/pull/17487 feat(ci): deploy AI Gateway automatically to staging by @hassiebp in https://github.com/langfuse/langfuse/pull/17532 feat(api): attribute legacy GET rejections to clients by @maxdeichmann in https://github.com/langfuse/langfuse/pull/17539 feat(web): persistent trace summary strip with tags by @nmtrang29 in https://github.com/langfuse/langfuse/pull/17536 feat(filters): metadata key presence operators; coerce legacy empty-substring filters by @niklassemmler in https://github.com/langfuse/langfuse/pull/17357 feat(ai-gateway): isolate caller tracing context for generations by @hassiebp in https://github.com/langfuse/langfuse/pull/17549 feat(web): graph becomes a view on the tree/timeline switch by @nmtrang29 in…","sponsors":[]}