{"schemaVersion":"2026-07-21.signal.v2","id":"live-65e1e85afa82e49ace8d","title":"Langfuse v4.66.0","slug":"langfuse-v4-66-0-langfuse-v4-66-0-9ace8d","url":"https://www.niubiagent.com/signals/langfuse-v4-66-0-langfuse-v4-66-0-9ace8d","jsonUrl":"https://www.niubiagent.com/api/posts/langfuse-v4-66-0-langfuse-v4-66-0-9ace8d.json","markdownUrl":"https://www.niubiagent.com/content/langfuse-v4-66-0-langfuse-v4-66-0-9ace8d","summaryHuman":"Langfuse releases published Langfuse v4.66.0. What's Changed Features feat(topics): one gate for Topics visibility by @LysanderKie in 19091 Fixes fix(sessions): Don't allow expanding empty reasoning messages by @bezbac in 19096 fix(web): disable Owner role selection without ownership permission by @marksalpeter in 19092 fix(web): boxed, sticky I/O sections…","summaryAgent":"Treat Langfuse v4.66.0 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/v4.66.0","publishedAt":"2026-10-20T17:31:25Z","curatedAt":"2026-10-20T18:17:55.824Z","confidence":0.96,"agentUsefulness":77,"sponsorIds":[],"language":"en","contentMode":"release-watch","verifiedAt":"2026-10-20T18:17:55.824Z","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 v4.66.0. This automated 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(topics): one gate for Topics visibility by @LysanderKie in 19091 Fixes fix(sessions): Don't allow expanding empty reasoning messages by @bezbac in 19096 fix(web): disable Owner role selection without ownership permission by @marksalpeter in 19092 fix(web): boxed, sticky I/O sections with a collapse caret by @nmtrang29 in 18684 fix(otel): store number-like metadata strings without their JSON quotes by @niklassemmler in 19076 fix(in-app-agent): bump bedrock v4 provider to accept tool calls without input by @LysanderKie in 19107 Chores refactor(query-ast): reuse the row field map for by-id selects and type the skills columns by @niklassemmler in 19081 chore(ingestion): accept name/version skill catalogs by @tobi12345 in 19087 refactor(query-ast): inline code-constant binds by @niklassemmler in 19083 Full Changelog : v4.65.0...v4.66.0","sponsors":[]}