langfuse

v3.215.0 Feature

This release adds 3 notable features for engineering teams evaluating rollout.

Published 11d Tracing

View tool

✓ No known CVEs patched

Read the diff → Tool health → What is this tool? →

✓ No known CVEs patched in this version

Topics

analytics autogen evaluation langchain large-language-models llama-index

+12 more

llm llm-evaluation llm-observability llmops monitoring observability openai playground prompt-engineering prompt-management self-hosted ycombinator

Summary

AI summary

Updates Chores, preview, and agent across a mixed release.

Changes in this release

Type	Severity	Summary	CVE
Feature
Feature	Low	Adds sandbox to agent. Adds sandbox to agent. Source: llm_adapter@2026-07-16 Confidence: high	—
Feature	Low	Shows Sentry error ID on crash page in web UI. Shows Sentry error ID on crash page in web UI. Source: llm_adapter@2026-07-16 Confidence: high	—
Feature	Low	Suggests matching facet filters for bare typed terms in search bar. Suggests matching facet filters for bare typed terms in search bar. Source: llm_adapter@2026-07-16 Confidence: high	—
Performance	Low	Builds web and worker images in parallel for preview (performance improvement). Builds web and worker images in parallel for preview (performance improvement). Source: llm_adapter@2026-07-16 Confidence: high	—
Bugfix
Bugfix	Medium	Fixes preview PR comment to advertise demo seed login. Fixes preview PR comment to advertise demo seed login. Source: llm_adapter@2026-07-16 Confidence: high	—
Bugfix	Medium	Fixes trace retrieval using trace TS instead of obs TS in v4. Fixes trace retrieval using trace TS instead of obs TS in v4. Source: llm_adapter@2026-07-16 Confidence: high	—
Bugfix	Medium	Keeps internal reasoning options off compatible LLM requests. Keeps internal reasoning options off compatible LLM requests. Source: llm_adapter@2026-07-16 Confidence: high	—
Bugfix	Medium	Scopes Sentry HTTP client integration to stop capturing expected poll/health 5xx errors. Scopes Sentry HTTP client integration to stop capturing expected poll/health 5xx errors. Source: llm_adapter@2026-07-16 Confidence: high	—
Bugfix	Medium	Guards session-view trace-card I/O against non‑array shape (regression fix). Guards session-view trace-card I/O against non‑array shape (regression fix). Source: llm_adapter@2026-07-16 Confidence: high	—
Bugfix	Medium	Collapses long system prompts on all render paths. Collapses long system prompts on all render paths. Source: llm_adapter@2026-07-16 Confidence: high	—

Full changelog

What's Changed

Features

feat(search-bar): suggest matching facet filters for bare typed terms (LFE-10888) by @nkabardin in https://github.com/langfuse/langfuse/pull/15053
feat(web): Show sentry error ID on crash page by @bezbac in https://github.com/langfuse/langfuse/pull/13310
feat(agent): Add sandbox by @bezbac in https://github.com/langfuse/langfuse/pull/14712

Fixes

fix(preview): advertise demo seed login in the preview PR comment by @maxdeichmann in https://github.com/langfuse/langfuse/pull/15131
fix(v4): use trace TS to get traces, not obs ts by @nimarb in https://github.com/langfuse/langfuse/pull/15135
fix(llm): keep internal reasoning options off compatible requests by @hassiebp in https://github.com/langfuse/langfuse/pull/15137
fix(sentry): scope httpClientIntegration to stop capturing expected poll/health 5xx (LFE-10975) by @nkabardin in https://github.com/langfuse/langfuse/pull/15145
fix(sessions): guard session-view trace-card I/O against non-array shape (regression from #15124) by @nkabardin in https://github.com/langfuse/langfuse/pull/15133
fix(trace): collapse long system prompts on all render paths (LFE-10934) by @nkabardin in https://github.com/langfuse/langfuse/pull/15106

Chores

chore(agent): add project url to metadata by @nimarb in https://github.com/langfuse/langfuse/pull/15136
perf(preview): build web and worker images in parallel by @maxdeichmann in https://github.com/langfuse/langfuse/pull/15141
docs(agents): add langfuse-previews skill by @maxdeichmann in https://github.com/langfuse/langfuse/pull/15128
chore(preview): link the debug guide from the preview PR comment by @maxdeichmann in https://github.com/langfuse/langfuse/pull/15134
ci(preview): reap stale PR preview environments after 3d inactivity by @maxdeichmann in https://github.com/langfuse/langfuse/pull/15140

Full Changelog: https://github.com/langfuse/langfuse/compare/v3.214.0...v3.215.0

View diff on GitHub

Weekly OSS security release digest.

The CVE patches and breaking changes that affected production tools this week. One email, every Sunday.

No spam, unsubscribe anytime.

Share this release

Share on X Share on Bluesky

Track langfuse

Get notified when new releases ship.

About langfuse

🪢 Open source LLM engineering platform: LLM Observability, metrics, evals, prompt management, playground, datasets. Integrates with OpenTelemetry, Langchain, OpenAI SDK, LiteLLM, and more. YC W23

All releases →