langfuse

v3.216.0 Feature

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

Published 10d Tracing

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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

Affected surfaces

auth

Summary

AI summary

Updates Chores, api, and sessions across a mixed release.

Changes in this release

Type	Severity	Summary	CVE
Feature
Feature	Medium	Adds metadata filtering on v4 sessions. Adds metadata filtering on v4 sessions. Source: llm_adapter@2026-07-16 Confidence: high	—
Feature	Medium	Adds base64 payload style for huge data-URI IO in seeder. Adds base64 payload style for huge data-URI IO in seeder. Source: llm_adapter@2026-07-16 Confidence: high	—
Feature	Medium	Adds dashboard & widget CRUD to Public API and MCP (unstable). Adds dashboard & widget CRUD to Public API and MCP (unstable). Source: llm_adapter@2026-07-16 Confidence: high	—
Dependency	Low	Bumps nodemailer dependency to version 9.0.3. Bumps nodemailer dependency to version 9.0.3. Source: llm_adapter@2026-07-16 Confidence: high	—
Performance	Low	Replaces lossless-json parser with native JSON.parse for faster parsing. Replaces lossless-json parser with native JSON.parse for faster parsing. Source: granite4.1:30b@2026-07-16-audit Confidence: low	—
Bugfix
Bugfix	Medium	Fixes force events_full for truncation‑sensitive filters. Fixes force events_full for truncation‑sensitive filters. Source: llm_adapter@2026-07-16 Confidence: high	—
Bugfix	Medium	Suppresses spurious 404 toast on automation delete and adds instant not‑found detection. Suppresses spurious 404 toast on automation delete and adds instant not‑found detection. Source: llm_adapter@2026-07-16 Confidence: high	—
Bugfix	Medium	Improves tool call styling in agent component. Improves tool call styling in agent component. Source: llm_adapter@2026-07-16 Confidence: high	—
Bugfix	Medium	Budgets aggregated graph layout so dense traces cannot freeze the tab. Budgets aggregated graph layout so dense traces cannot freeze the tab. Source: llm_adapter@2026-07-16 Confidence: high	—
Bugfix	Medium	Handles legacy traces widgets on unstable dashboard‑widgets API. Handles legacy traces widgets on unstable dashboard‑widgets API. Source: llm_adapter@2026-07-16 Confidence: high	—
Bugfix	Medium	Fixes guard callback‑url redirect against malformed URLs (prevents 500 errors). Fixes guard callback‑url redirect against malformed URLs (prevents 500 errors). Source: llm_adapter@2026-07-16 Confidence: low	—

Full changelog

What's Changed

Features

feat(sessions): allow metadata filtering on v4 by @nimarb in https://github.com/langfuse/langfuse/pull/15138
feat(worker): write deprecation notice into blob export for legacy sources (LFE-10896) by @niklassemmler in https://github.com/langfuse/langfuse/pull/15068
feat(seeder): add base64 payload style for huge data-URI IO (LFE-10152) by @nkabardin in https://github.com/langfuse/langfuse/pull/15054
feat(api, mcp): Add dashboard & widget CRUD to Public API & MCP (unstable) by @LysanderKie in https://github.com/langfuse/langfuse/pull/15080

Fixes

fix(auth): guard callback-url redirect against malformed callbackUrl (500s) by @Steffen911 in https://github.com/langfuse/langfuse/pull/15132
fix(events): force events_full for truncation-sensitive filters (LFE-10779) by @niklassemmler in https://github.com/langfuse/langfuse/pull/15069
fix(automations): suppress spurious 404 toast on delete, instant not-found detection by @wochinge in https://github.com/langfuse/langfuse/pull/15147
fix(agent): Improve tool call styling by @bezbac in https://github.com/langfuse/langfuse/pull/15084
fix(trace): budget aggregated graph layout so dense traces can't freeze the tab (LFE-10988) by @nkabardin in https://github.com/langfuse/langfuse/pull/15153
fix(api): handle legacy traces widgets on unstable dashboard-widgets API by @LysanderKie in https://github.com/langfuse/langfuse/pull/15154

Chores

chore(deps): bump nodemailer to 9.0.3 by @nimarb in https://github.com/langfuse/langfuse/pull/15102
perf(shared): replace lossless-json parser with native JSON.parse source reviver by @Steffen911 in https://github.com/langfuse/langfuse/pull/15104

Full Changelog: https://github.com/langfuse/langfuse/compare/v3.215.0...v3.216.0

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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

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