Langfuse Releases & Changelog

What's Changed

chore: improve agent development setup by @hassiebp in https://github.com/langfuse/langfuse-python/pull/1642
feat(ci): add RunnerContext and RegressionError for experiment GH action by @wochinge in https://github.com/langfuse/langfuse-python/pull/1635
ci: allow prerelease branch releases by @hassiebp in https://github.com/langfuse/langfuse-python/pull/1647
fix(openai): handle Azure stream chunks without delta by @hassiebp in https://github.com/langfuse/langfuse-python/pull/1648

Full Changelog: https://github.com/langfuse/langfuse-python/compare/v4.5.1...v4.6.1

What's Changed

Features

feat(experiments): show metadata in overview by @wochinge in https://github.com/langfuse/langfuse/pull/13456
feat(worker): add secondary otel ingestion queue by @Steffen911 in https://github.com/langfuse/langfuse/pull/13490
feat(sso): self-service SSO config with DNS-verified domains by @marksalpeter in https://github.com/langfuse/langfuse/pull/13507

Fixes / Improvements

fix(evals): do not drop langfuseObject on config on template upgrades by @hassiebp in https://github.com/langfuse/langfuse/pull/13429
fix(evals): validate evaluator mapping target server-side by @hassiebp in https://github.com/langfuse/langfuse/pull/13430
fix(batch-actions): compute count subject to searchQuery and searchType by @marliessophie in https://github.com/langfuse/langfuse/pull/13441
fix(web): Improve toast title for ClickHouseResourceError errors by @bezbac in https://github.com/langfuse/langfuse/pull/13373
fix(organizations): add margin to separator when no project is selected by @bezbac in https://github.com/langfuse/langfuse/pull/13445
fix(widgets): render latency metrics in scaled units in custom dashboard widgets by @marksalpeter in https://github.com/langfuse/langfuse/pull/13242
fix(web): include today in Prompts table observation count window by @jannikmaierhoefer in https://github.com/langfuse/langfuse/pull/13415
fix(worker): keep spend alert billing skips healthy by @maxdeichmann in https://github.com/langfuse/langfuse/pull/13467
fix(docker): remove corepack cache from runtime-base stage by @maxdeichmann in https://github.com/langfuse/langfuse/pull/13470
fix(evals): add evaluator filter validation and handling by @marliessophie in https://github.com/langfuse/langfuse/pull/13474
fix(web): Prisma also returns "Unique constraint failed", so check lowercase string by @deejay1 in https://github.com/langfuse/langfuse/pull/13477
fix(events): stringify batchIO metadata for tRPC by @maxdeichmann in https://github.com/langfuse/langfuse/pull/13457
fix(trace-ui): prevent image flicker on validateImgUrl false by @seokjin0414 in https://github.com/langfuse/langfuse/pull/13440
fix(shared): harden outbound URL validation against SSRF bypasses by @wochinge in https://github.com/langfuse/langfuse/pull/13485
fix(web): Saved views UX improvements by @bezbac in https://github.com/langfuse/langfuse/pull/13454
fix(scim): write audit log on user creation via SCIM POST by @Steffen911 in https://github.com/langfuse/langfuse/pull/13496
fix(public-api): rate-limit project apiKeys admin and prompt POST by @Steffen911 in https://github.com/langfuse/langfuse/pull/13498
fix(traces): Create synthetic traces from events consistently by @bezbac in https://github.com/langfuse/langfuse/pull/13450
fix(worker): preserve encrypted webhook headers on disable by @wochinge in https://github.com/langfuse/langfuse/pull/13503
fix(web): validate image URL redirects by @wochinge in https://github.com/langfuse/langfuse/pull/13501
fix(projects): persist parsed metadata on project create/update by @Steffen911 in https://github.com/langfuse/langfuse/pull/13497
fix(web): remove Request Chart button from home screen by @marliessophie in https://github.com/langfuse/langfuse/pull/13509
fix(shared): reject DNS-failing hostnames in outbound URL validation by @wochinge in https://github.com/langfuse/langfuse/pull/13512

Chores

chore: upgrade bullmq to 5.76.3 by @maxdeichmann in https://github.com/langfuse/langfuse/pull/13442
chore(deps): upgrade uuid v9 → v14 by @maxdeichmann in https://github.com/langfuse/langfuse/pull/13443
chore: Increase admin access webhook dedupe window to 24 hours by @maxdeichmann in https://github.com/langfuse/langfuse/pull/13414
refactor(model-match): remove redis parse span by @maxdeichmann in https://github.com/langfuse/langfuse/pull/13182
chore(web): Remove unused unified & remark dependencies by @bezbac in https://github.com/langfuse/langfuse/pull/13409
chore(web): Remove unused graphql dependency by @bezbac in https://github.com/langfuse/langfuse/pull/13410
chore(deps): remove redundant @types/uuid devDependency by @maxdeichmann in https://github.com/langfuse/langfuse/pull/13448
chore: add migration hints for legacy public ClickHouse APIs by @maxdeichmann in https://github.com/langfuse/langfuse/pull/13475
refactor(web): Create new design system dir & extract Spinner by @bezbac in https://github.com/langfuse/langfuse/pull/13428
chore(deps): web - build migrate binary with Go 1.26 by @vkael in https://github.com/langfuse/langfuse/pull/13486
chore(deps): bump posthog 5.32 / 1.372 by @nimarb in https://github.com/langfuse/langfuse/pull/13487
chore: Create eslint plugin package by @bezbac in https://github.com/langfuse/langfuse/pull/13444
chore(web): Setup in-source testing with Vitest by @bezbac in https://github.com/langfuse/langfuse/pull/13484
chore(deps): bump ip-addresses to 10.2.0 by @nimarb in https://github.com/langfuse/langfuse/pull/13505
chore(deps): bump nextjs to 16.2.6 by @nimarb in https://github.com/langfuse/langfuse/pull/13516
ci: harden prettier check file arguments by @wochinge in https://github.com/langfuse/langfuse/pull/13513

New Contributors

@vkael made their first contribution in https://github.com/langfuse/langfuse/pull/13486
@seokjin0414 made their first contribution in https://github.com/langfuse/langfuse/pull/13440

Full Changelog: https://github.com/langfuse/langfuse/compare/v3.172.1...v3.173.0

What's Changed

fix(ci): pin actions/setup-node version comment to v6.3.0 by @wochinge in https://github.com/langfuse/langfuse-js/pull/792
chore(ci): pin remaining action version comments to immutable patch tags by @wochinge in https://github.com/langfuse/langfuse-js/pull/793
chore: improve codex agent setup by @hassiebp in https://github.com/langfuse/langfuse-js/pull/797
feat(client): add experiment runner context by @wochinge in https://github.com/langfuse/langfuse-js/pull/795
chore: test release-it preview by @wochinge in https://github.com/langfuse/langfuse-js/pull/799

Full Changelog: https://github.com/langfuse/langfuse-js/compare/v5.2.0...v5.3.0

What's Changed

chore: improve agent development setup by @hassiebp in https://github.com/langfuse/langfuse-python/pull/1642
feat(ci): add RunnerContext and RegressionError for experiment GH action by @wochinge in https://github.com/langfuse/langfuse-python/pull/1635

Full Changelog: https://github.com/langfuse/langfuse-python/compare/v4.5.1...v4.6.0b1

What's Changed

Fixes

fix(traces): refresh scores in trace detail by @wochinge in https://github.com/langfuse/langfuse/pull/13427

Chores

chore(eslint): Disallow use of overflow-scroll classes by @bezbac in https://github.com/langfuse/langfuse/pull/13403
chore(ci): disable test sharding + speed up test suite by @wochinge in https://github.com/langfuse/langfuse/pull/13383
test: deflake DNS-dependent CI tests by @wochinge in https://github.com/langfuse/langfuse/pull/13412

Full Changelog: https://github.com/langfuse/langfuse/compare/v3.172.0...v3.172.1

What's Changed

Features

feat(traces): Add none filter mode for tags in the sidebar by @bezbac in https://github.com/langfuse/langfuse/pull/13339

Fixes / Improvements

fix(server): ingest flattened experiment metadata by @hassiebp in https://github.com/langfuse/langfuse/pull/13368
perf(clickhouse): emit has(metadata_names) conjunct for events filters by @sumerman in https://github.com/langfuse/langfuse/pull/13369
fix(internal-tracing): remove output parser spans by @hassiebp in https://github.com/langfuse/langfuse/pull/13371
docs(agents): improve Agents.md by @wochinge in https://github.com/langfuse/langfuse/pull/13372
test: re-enable Vitest parallelism by @wochinge in https://github.com/langfuse/langfuse/pull/13366
fix(traces): Limit number of categorical score names and values by @bezbac in https://github.com/langfuse/langfuse/pull/13308
fix(web): Pre-fill email when switching regions by @bezbac in https://github.com/langfuse/langfuse/pull/13370
fix(events): use release field for trace release in events table adapter by @AlissonRS in https://github.com/langfuse/langfuse/pull/13274
fix(dashboards): Resolve filter options consistently by @bezbac in https://github.com/langfuse/langfuse/pull/13335
fix(clickhouse): use alter_sync/mutations_sync on multi-ALTER clustered migrations by @Steffen911 in https://github.com/langfuse/langfuse/pull/13398
fix(traces): Show correct title prefix in trace detail peek view by @bezbac in https://github.com/langfuse/langfuse/pull/13283

Chores

chore(agent-dx): add debug-issue-with-datadog skill by @Steffen911 in https://github.com/langfuse/langfuse/pull/13375
chore(eslint): enable no-deprecated by @wochinge in https://github.com/langfuse/langfuse/pull/13374
chore(env): add LANGFUSE_ENABLE_EVENTS_TABLE_UI flag for UI events table support by @marliessophie in https://github.com/langfuse/langfuse/pull/13346
chore(deps): bump prettier to 3.8.3 by @nimarb in https://github.com/langfuse/langfuse/pull/13387
chore(skills): suggest to run pnpm dedupe by @nimarb in https://github.com/langfuse/langfuse/pull/13401
chore(deps): bump next to 16.2.4 by @nimarb in https://github.com/langfuse/langfuse/pull/13402
chore(web): Remove @mui/material dependency by @bezbac in https://github.com/langfuse/langfuse/pull/13399
chore(web): Track error notification clicks by @bezbac in https://github.com/langfuse/langfuse/pull/13386

New Contributors

@AlissonRS made their first contribution in https://github.com/langfuse/langfuse/pull/13274

Full Changelog: https://github.com/langfuse/langfuse/compare/v3.171.0...v3.172.0

What's Changed

Features

feat(scores-api): allow source=ANNOTATION on POST /api/public/scores by @wochinge in https://github.com/langfuse/langfuse/pull/13286
feat(model-prices): add gpt-5.5) by @hassiebp in https://github.com/langfuse/langfuse/pull/13354

Fixes / Improvements

fix(worker): cap PostHog export window at next UTC day boundary (LFE-9475) by @Steffen911 in https://github.com/langfuse/langfuse/pull/13326
fix(shared): cap analytics observations CTE upper bound (LFE-9475) by @Steffen911 in https://github.com/langfuse/langfuse/pull/13329
fix(dev): fix seed command by @nimarb in https://github.com/langfuse/langfuse/pull/13337
perf(clickhouse): scores query in events.all scans all partitions by @sumerman in https://github.com/langfuse/langfuse/pull/13336
fix: add breadcrumb to dataset items page by @marliessophie in https://github.com/langfuse/langfuse/pull/13344
perf(clickhouse): pre-filter traces in CTE for analytics integration joins by @Steffen911 in https://github.com/langfuse/langfuse/pull/13364

Chores

chore: add langfuse JP to region picker by @Steffen911 in https://github.com/langfuse/langfuse/pull/13361
chore: hide eval preview if user has not ingested with otel in the past 7 days by @marliessophie in https://github.com/langfuse/langfuse/pull/13343
chore(deps): axios 1.15.2 and dedupe by @nimarb in https://github.com/langfuse/langfuse/pull/13365

Full Changelog: https://github.com/langfuse/langfuse/compare/v3.170.0...v3.171.0

A new dedicated cloud region in Tokyo keeps traces, prompts, and evaluation data inside Japan.

What's Changed

chore(ci): pin action version comments to immutable patch tags by @wochinge in https://github.com/langfuse/langfuse-python/pull/1636
fix(experiments): flatten propagated metadata by @hassiebp in https://github.com/langfuse/langfuse-python/pull/1641

Full Changelog: https://github.com/langfuse/langfuse-python/compare/v4.5.0...v4.5.1

What's Changed

Features

feat(web): warn about unencoded special characters in DATABASE_URL on migration failure by @Steffen911 in https://github.com/langfuse/langfuse/pull/13186
feat: emit .rate and .time metrics with shard tags for DataDog aggregation by @sumerman in https://github.com/langfuse/langfuse/pull/13249
feat(auth): allow configuration of ID Token signed response alg by @ICZAD769 in https://github.com/langfuse/langfuse/pull/12333
feat: detect SDK version from langfuse events table by @marliessophie in https://github.com/langfuse/langfuse/pull/13203
feat(experiments): add support to trigger evals by @marliessophie in https://github.com/langfuse/langfuse/pull/13240
feat(web): Add region selector to user menu by @bezbac in https://github.com/langfuse/langfuse/pull/13270
feat(api): add unstable evals public endpoints by @hassiebp in https://github.com/langfuse/langfuse/pull/12829
feat(api): add DELETE endpoint for LLM connections by @Steffen911 in https://github.com/langfuse/langfuse/pull/13247
feat(prompts): Add time window filtering to prompt metrics by @bezbac in https://github.com/langfuse/langfuse/pull/13282
feat(widgets): distinguish between available and called tools in filter by @nimarb in https://github.com/langfuse/langfuse/pull/13281
feat(ui): decode unicode escapes in PrettyJsonView for trace detail by @toyayuto in https://github.com/langfuse/langfuse/pull/13223
feat: add 5-minute and 20-minute blob storage export frequency options by @nelsonauner in https://github.com/langfuse/langfuse/pull/13126
feat(ui): add floating multi-select action bar by @marliessophie in https://github.com/langfuse/langfuse/pull/12851
feat(experiments): add enabled toggle for remote dataset run trigger (#13221) by @marliessophie in https://github.com/langfuse/langfuse/pull/13289

Fixes

fix: coerce AUTH_SSO_TIMEOUT to number by @Steffen911 in https://github.com/langfuse/langfuse/pull/13199
fix: make new queue depth metrics usable in cloud watch by @sumerman in https://github.com/langfuse/langfuse/pull/13241
fix(security): sanitize score config names to prevent CSS injection by @Steffen911 in https://github.com/langfuse/langfuse/pull/13206
fix(security): use constant-time comparison for admin API key auth by @Steffen911 in https://github.com/langfuse/langfuse/pull/13208
fix(model-prices): add match on claude-haiku-4-5 by @hassiebp in https://github.com/langfuse/langfuse/pull/13254
fix(datasets): fix errors during json schema generation by @wochinge in https://github.com/langfuse/langfuse/pull/13193
fix(web): Improve skeleton loading state for tables by @bezbac in https://github.com/langfuse/langfuse/pull/13235
fix(web): Stale search highlights by @bezbac in https://github.com/langfuse/langfuse/pull/13237
fix(web): Use overflow-auto instead of overflow-scroll for main content by @bezbac in https://github.com/langfuse/langfuse/pull/13267
fix(dashboards): exclude TEXT and CORRECTION scores from scores-numeric view by @wochinge in https://github.com/langfuse/langfuse/pull/13276
fix(batch-actions): allow dialog close on status step and fix Go to Dataset 404 by @wochinge in https://github.com/langfuse/langfuse/pull/13277
fix(audit-logs): capture after-state and normalise resource ids for member role changes by @Steffen911 in https://github.com/langfuse/langfuse/pull/13278
fix(storage): disable default S3 checksums for GCS multipart uploads by @Steffen911 in https://github.com/langfuse/langfuse/pull/13280
fix(onboarding): add PH button capture for 'try demo project' by @annabellscha in https://github.com/langfuse/langfuse/pull/13251
fix(web): prevent DataTable onRowClick when clicking interactive elements by @marliessophie in https://github.com/langfuse/langfuse/pull/12881
fix(web): migrate unstable eval unit tests to vitest by @hassiebp in https://github.com/langfuse/langfuse/pull/13300
fix(evals): fix score filtering on evaluator runs page by @wochinge in https://github.com/langfuse/langfuse/pull/13225
fix(widgets): handle pivot table legacy sorting by @nimarb in https://github.com/langfuse/langfuse/pull/13306
fix(web): prevent crash on invalid JSONPath in dataset mapping editor by @wochinge in https://github.com/langfuse/langfuse/pull/13253

Chores

chore: deterministic CloudUsageMeteringQueue init by @sumerman in https://github.com/langfuse/langfuse/pull/13239
chore(scim): add [SCIM] log prefix and operation confirmations by @Steffen911 in https://github.com/langfuse/langfuse/pull/13245
chore: prefix batch export logs by @Steffen911 in https://github.com/langfuse/langfuse/pull/13246
ci: run zizmor on fork PRs by failing on findings by @wochinge in https://github.com/langfuse/langfuse/pull/13263
ci: pin useblacksmith/setup-docker-builder comment to v1.6.0 by @wochinge in https://github.com/langfuse/langfuse/pull/13266
refactor(web): Remove unused components and hooks by @bezbac in https://github.com/langfuse/langfuse/pull/13148
refactor(web): Make useSidebarFilterState state location more explicit by @bezbac in https://github.com/langfuse/langfuse/pull/13150
refactor(traces): Remove unused updateTags mutation from router by @bezbac in https://github.com/langfuse/langfuse/pull/13269
chore: bump bullmq to 5.73.5 by @sumerman in https://github.com/langfuse/langfuse/pull/13256
chore(tests): use gemini-2.5-flash-lite for GoogleAIStudio tests by @coffee4tw in https://github.com/langfuse/langfuse/pull/13265
chore(worker): include fileKey in OTEL ingestion failure logs by @Steffen911 in https://github.com/langfuse/langfuse/pull/13271
chore(deps): bump dompurify to 3.4.0 by @nimarb in https://github.com/langfuse/langfuse/pull/13272
chore(web): Remove @headlessui packages by @bezbac in https://github.com/langfuse/langfuse/pull/13275
refactor(web): Enable react/no-unused-prop-types eslint rule by @bezbac in https://github.com/langfuse/langfuse/pull/13209
chore(experiments): remove outdated peek view code by @marliessophie in https://github.com/langfuse/langfuse/pull/13009
chore(ci): pin action version comments to immutable patch tags by @wochinge in https://github.com/langfuse/langfuse/pull/13291
refactor(web): migrate test framework from Jest to Vitest by @wochinge in https://github.com/langfuse/langfuse/pull/13191
refactor(web): Always allow toggling V4 in dev mode by @bezbac in https://github.com/langfuse/langfuse/pull/13284
refactor(web): Do not reuse table name for observations and events table by @bezbac in https://github.com/langfuse/langfuse/pull/13204
chore: add ingestion_size_stats table and MVs to dev-tables by @sumerman in https://github.com/langfuse/langfuse/pull/13307
chore(observability): upgrade opentelemetry and datadog SDKs by @maxdeichmann in https://github.com/langfuse/langfuse/pull/12737
chore(worker): harden cloud free tier usage threshold job by @Steffen911 in https://github.com/langfuse/langfuse/pull/13322

New Contributors

@ICZAD769 made their first contribution in https://github.com/langfuse/langfuse/pull/12333

Full Changelog: https://github.com/langfuse/langfuse/compare/v3.169.0...v3.170.0

v3.170.0-0 (Observability test release)

⚠️ ⚠️ Pre-release to test new observability updates.

What's Changed

feat(api): update API spec from langfuse/langfuse 07cae52 by @langfuse-bot in https://github.com/langfuse/langfuse-js/pull/776
chore(ci): optimize e2e langfuse server setup by @hassiebp in https://github.com/langfuse/langfuse-js/pull/777
ci: add dependabot cooldown by @wochinge in https://github.com/langfuse/langfuse-js/pull/778
ci(deps): bump github/codeql-action from 3.35.1 to 4.35.1 in the github-actions group across 1 directory by @dependabot[bot] in https://github.com/langfuse/langfuse-js/pull/780
ci: harden GitHub Actions workflows with zizmor by @wochinge in https://github.com/langfuse/langfuse-js/pull/783
ci: add missing dependabot cooldown by @wochinge in https://github.com/langfuse/langfuse-js/pull/784
fix(langchain): emit tool observations for LangChain tool runs by @hassiebp in https://github.com/langfuse/langfuse-js/pull/787
ci(deps): bump the github-actions group with 2 updates by @dependabot[bot] in https://github.com/langfuse/langfuse-js/pull/788
fix(ci): disable zizmor advanced security to unblock releases by @wochinge in https://github.com/langfuse/langfuse-js/pull/789
fix(ci): allow for immutable GitHub releases by @wochinge in https://github.com/langfuse/langfuse-js/pull/790
fix(ci): fix mutated workfile by @wochinge in https://github.com/langfuse/langfuse-js/pull/791

Full Changelog: https://github.com/langfuse/langfuse-js/compare/v5.1.0...v5.2.0

What's Changed

fix(ci): disable zizmor advanced security to unblock releases by @wochinge in https://github.com/langfuse/langfuse-python/pull/1630
fix(observe): preserve streaming context without output capture by @hassiebp in https://github.com/langfuse/langfuse-python/pull/1628
ci: use explicit version for fetch-metadata version comment by @wochinge in https://github.com/langfuse/langfuse-python/pull/1633
fix(observe): preserve streaming context without output capture by @hassiebp in https://github.com/langfuse/langfuse-python/pull/1634
fix(langchain): preserve LangGraph control flow traces by @hassiebp in https://github.com/langfuse/langfuse-python/pull/1632
fix(openai): preserve native v1 stream contract by @hassiebp in https://github.com/langfuse/langfuse-python/pull/1627

Full Changelog: https://github.com/langfuse/langfuse-python/compare/v4.3.1...v4.5.0

What's Changed

Features

feat: QueueMetricsRunner collects queue metrics on a fixed schedule and aggegates sharded queue metrics by @sumerman in https://github.com/langfuse/langfuse/pull/13231

Fixes / Improvments

fix: update managed ragas-faithfulness-evaluator with proper scoring and prompt details by @marliessophie in https://github.com/langfuse/langfuse/pull/13226
fix(ci): use exact release tags in action version comments by @wochinge in https://github.com/langfuse/langfuse/pull/13229
fix(prompts): Prevent text overlap when adding prompt reference by @bezbac in https://github.com/langfuse/langfuse/pull/13236

Chores

chore(deps): bump protobufjs to 7.5.5 by @nimarb in https://github.com/langfuse/langfuse/pull/13232
chore(deps): bump follow-redirects 1160 by @nimarb in https://github.com/langfuse/langfuse/pull/13233
chore(skill): pnpm upgrade skill doesnt change lock file manually by @nimarb in https://github.com/langfuse/langfuse/pull/13234
chore: Update pull request template to clarify chore and refactor types by @bezbac in https://github.com/langfuse/langfuse/pull/13166

Full Changelog: https://github.com/langfuse/langfuse/compare/v3.168.0...v3.169.0

What's Changed

fix(ci): disable zizmor advanced security to unblock releases by @wochinge in https://github.com/langfuse/langfuse-python/pull/1630

Full Changelog: https://github.com/langfuse/langfuse-python/compare/v4.3.1...v4.4.0b1

What's Changed

Features

feat(web): add support for AWS Bedrock API Keys (Bearer Tokens) by @wochinge in https://github.com/langfuse/langfuse/pull/13098
feat(experiments): direct-write prompt experiment root events by @hassiebp in https://github.com/langfuse/langfuse/pull/13044
feat: add OCI Object Storage Native SDK integration with IAM auth options by @sanjeev260191 in https://github.com/langfuse/langfuse/pull/12379
feat(ui): remove tier from pylon issue field and change warning message by @jannikmaierhoefer in https://github.com/langfuse/langfuse/pull/13140
feat(cache): add local l1 cache for model match by @hassiebp in https://github.com/langfuse/langfuse/pull/12977
feat(slack): show change author in Slack prompt notification by @wochinge in https://github.com/langfuse/langfuse/pull/13149
feat(model-prices): add claude-opus-4-7 by @hassiebp in https://github.com/langfuse/langfuse/pull/13214
feat(tracing): tracing setup page with prompt by @annabellscha in https://github.com/langfuse/langfuse/pull/13045

Fixes / Improvements

fix: count histogram UI switching during widget editing by @sumerman in https://github.com/langfuse/langfuse/pull/13128
fix: github oauth should check issuer by @sumerman in https://github.com/langfuse/langfuse/pull/13115
fix: Missing trace tags in v4 table and detail view by @bezbac in https://github.com/langfuse/langfuse/pull/13165
fix: prevent ip validation bypass for image URL validation by @Steffen911 in https://github.com/langfuse/langfuse/pull/13207
fix: rename migration from a cleaned up name to avoid repeated reapplication by @sumerman in https://github.com/langfuse/langfuse/pull/13153
fix(annotation): render session-level screens subject to fast preview mode on/off by @marliessophie in https://github.com/langfuse/langfuse/pull/13178
fix(ci): handle invalid security-severity in Snyk SARIF output by @wochinge in https://github.com/langfuse/langfuse/pull/13163
fix(email): add project name to evaluator pause notifications by @hassiebp in https://github.com/langfuse/langfuse/pull/13135
fix(evals): make evaluation prompt read-only in view-only template mode (#13047) by @marliessophie in https://github.com/langfuse/langfuse/pull/13137
fix(evals): return full JSONPath slice result and deduplicate eval JSONPath logic by @wochinge in https://github.com/langfuse/langfuse/pull/13200
fix(experiments): keep referenced prompts single-row in compact density by @marliessophie in https://github.com/langfuse/langfuse/pull/13167
fix(llm-schemas): allow CUD access for project members by @hassiebp in https://github.com/langfuse/langfuse/pull/13134
fix(otel): normalize gen ai usage details by @hassiebp in https://github.com/langfuse/langfuse/pull/13110
fix(otel): prevent prototype pollution in OTel attribute key parsing by @Steffen911 in https://github.com/langfuse/langfuse/pull/13201
fix(shared): treat end-of-life model errors as non-retryable by @wochinge in https://github.com/langfuse/langfuse/pull/13129
fix(slack): remove redundant timestamp footer from Slack notifications by @wochinge in https://github.com/langfuse/langfuse/pull/13152
fix(traces): Use single-line skeletons for table with small row height by @bezbac in https://github.com/langfuse/langfuse/pull/13138
fix(web): Create new TableCellWithCopyButton for ApiKeyList by @bezbac in https://github.com/langfuse/langfuse/pull/13057
fix(web): Hide irrelevant filters in subtables by @bezbac in https://github.com/langfuse/langfuse/pull/13136
fix(web): Preserve whitespace in message search controller by @bezbac in https://github.com/langfuse/langfuse/pull/13096
fix(web): Prevent toast error when toggling v4 with selected saved view by @bezbac in https://github.com/langfuse/langfuse/pull/13077
fix(worker): sync managed evaluator vars on template updates by @marliessophie in https://github.com/langfuse/langfuse/pull/13164
perf(dual-write): clamp min start time to past day and optimize trace sorting by @Steffen911 in https://github.com/langfuse/langfuse/pull/13172

Chores

chore: add bloom_filter index on experiment_id to events_core by @sumerman in https://github.com/langfuse/langfuse/pull/13141
chore: add redis.full_command to redis traces by @sumerman in https://github.com/langfuse/langfuse/pull/13169
chore: add sampling for sharded queues by @maxdeichmann in https://github.com/langfuse/langfuse/pull/13143
chore: Initialize local databases during cloud setup and maintenance scripts by @sumerman in https://github.com/langfuse/langfuse/pull/13106
chore(ci): remove GitHub Actions that rely on Node 20 by @wochinge in https://github.com/langfuse/langfuse/pull/13194
chore(deps): run pnpm dedupe by @nimarb in https://github.com/langfuse/langfuse/pull/13142
chore(experiments): release public beta on cloud by @marliessophie in https://github.com/langfuse/langfuse/pull/13131
chore(experiments): rewrite metrics aggregation for total cost and latency to skip trace-level aggregation by @marliessophie in https://github.com/langfuse/langfuse/pull/13104
chore(security): fix snyk code scanning by @nimarb in https://github.com/langfuse/langfuse/pull/13158
chore(trpc): handling of errors with body parse issues by @marliessophie in https://github.com/langfuse/langfuse/pull/13211
chore(v4): default new orgs to v4 by @nimarb in https://github.com/langfuse/langfuse/pull/13105
ci: harden + monitor GH actions with zizmor by @wochinge in https://github.com/langfuse/langfuse/pull/13048
ci: reapply GH Actions hardening with deploy secret fix by @wochinge in https://github.com/langfuse/langfuse/pull/13161
ci(deps): bump the github-actions group across 1 directory with 16 updates by @dependabot[bot] in https://github.com/langfuse/langfuse/pull/13114
revert: ci: harden + monitor GH actions with zizmor (#13048) by @wochinge in https://github.com/langfuse/langfuse/pull/13155

New Contributors

@sanjeev260191 made their first contribution in https://github.com/langfuse/langfuse/pull/12379

Full Changelog: https://github.com/langfuse/langfuse/compare/v3.167.4...v3.168.0

What's Changed

feat(api): update API spec from langfuse/langfuse 07cae52 by @langfuse-bot in https://github.com/langfuse/langfuse-python/pull/1617
chore(deps): bump actions/github-script from 8.0.0 to 9.0.0 in the github-actions group by @dependabot[bot] in https://github.com/langfuse/langfuse-python/pull/1616
refactor(tests): split suites by execution level and speed up CI by @hassiebp in https://github.com/langfuse/langfuse-python/pull/1609
ci: add 7-day dependabot cooldown by @wochinge in https://github.com/langfuse/langfuse-python/pull/1619
ci: harden GitHub Actions workflows with zizmor by @wochinge in https://github.com/langfuse/langfuse-python/pull/1623
ci: make uv action tag explicit by @wochinge in https://github.com/langfuse/langfuse-python/pull/1625
fix(langchain): propagate trace name metadata by @hassiebp in https://github.com/langfuse/langfuse-python/pull/1626

Full Changelog: https://github.com/langfuse/langfuse-python/compare/v4.2.0...v4.3.1

What's Changed

feat(api): update API spec from langfuse/langfuse 07cae52 by @langfuse-bot in https://github.com/langfuse/langfuse-python/pull/1617
chore(deps): bump actions/github-script from 8.0.0 to 9.0.0 in the github-actions group by @dependabot[bot] in https://github.com/langfuse/langfuse-python/pull/1616
refactor(tests): split suites by execution level and speed up CI by @hassiebp in https://github.com/langfuse/langfuse-python/pull/1609
ci: add 7-day dependabot cooldown by @wochinge in https://github.com/langfuse/langfuse-python/pull/1619
ci: harden GitHub Actions workflows with zizmor by @wochinge in https://github.com/langfuse/langfuse-python/pull/1623

Full Changelog: https://github.com/langfuse/langfuse-python/compare/v4.2.0...v4.3.0rc1

Experiments now live alongside Datasets as their own top-level feature—run them with or without datasets, compare across runs, and track progress over time.

Compare Experiments Faster

Rebuilt experiment screens with faster loading, standalone access, and enhanced filtering for efficient analysis.

Key improvements:

Faster loading and filtering leveraging observation-centric data model
Standalone experiments that don't require linked datasets; SDK-based experiments now visible in UI
Polished UI with visual deltas on scores, cost, and latency, baseline comparison, and score threshold filtering

Run A/B tests between model versions, compare evaluation scores across prompt variants, or triage regressions with quicker feedback loops. Currently in open beta on Langfuse Cloud only.