What's Changed

Features

• feat: add boolean score widgets and monitors by @wochinge in https://github.com/langfuse/langfuse/pull/15255
• feat(otel): upload media during worker ingestion by @hassiebp in https://github.com/langfuse/langfuse/pull/15120
• feat(mcp): migrate score read tools from scores v2 to v3 (LFE-11051) by @niklassemmler in https://github.com/langfuse/langfuse/pull/15219
• feat(onboarding): track tracing api key creation click by @annabellscha in https://github.com/langfuse/langfuse/pull/15254
• feat(prompts): read v4 prompt usage counts from events (LFE-8919) by @Steffen911 in https://github.com/langfuse/langfuse/pull/15272
• feat(web): serve browser source maps in production (LFE-10974) by @nkabardin in https://github.com/langfuse/langfuse/pull/15277
• feat(observability): add reportError capture seam (LFE-10974) by @nkabardin in https://github.com/langfuse/langfuse/pull/15278
• feat(layouts): minimal-chrome mobile shell (LFE-11067) by @nkabardin in https://github.com/langfuse/langfuse/pull/15244
• feat(api): stream trace observation IO as bytes (LFE-11081) by @nkabardin in https://github.com/langfuse/langfuse/pull/15239

Fixes

• fix(trace): gate oversized fields in the JSON Beta IO viewer (LFE-10847) by @nkabardin in https://github.com/langfuse/langfuse/pull/15230
• fix(worker): wrap bare-boolean root metadata like other scalars (LFE-14344) by @niklassemmler in https://github.com/langfuse/langfuse/pull/15260
• fix(worker): stabilize data retention lag metrics by @sumerman in https://github.com/langfuse/langfuse/pull/15267
• fix(web): revert bold JSON keys in pretty trace view by @claude[bot] in https://github.com/langfuse/langfuse/pull/15271
• fix(tracing): reject searches without search types by @sumerman in https://github.com/langfuse/langfuse/pull/15273
• fix(agent): Set user agent header in MCP requests by @bezbac in https://github.com/langfuse/langfuse/pull/15268
• fix(web): Resolve dropdown component issues introduced in a186a9d by @bezbac in https://github.com/langfuse/langfuse/pull/15275
• fix(otel): persist post-media event bytes by @hassiebp in https://github.com/langfuse/langfuse/pull/15287
• fix(web): safely parse trace timestamp query params (#15256) by @Harsh23Kashyap in https://github.com/langfuse/langfuse/pull/15257
• fix(web): drop the bold role from table ID/name cells by @claude[bot] in https://github.com/langfuse/langfuse/pull/15288
• fix(ui): resolve peek trace id across v3/v4 URL dialects (LFE-11041) by @niklassemmler in https://github.com/langfuse/langfuse/pull/15199
• fix(agent): Fix empty state condition + make storybook tests reliable by @bezbac in https://github.com/langfuse/langfuse/pull/15300
• fix(feature-previews): allow enabling previews on self-hosted deploys by @nimarb in https://github.com/langfuse/langfuse/pull/15301
• fix(dashboards): let a widget's own environment filter override the dashboard env selector (LFE-14333) by @nkabardin in https://github.com/langfuse/langfuse/pull/15262
• fix(agent): Resolve saved view filters by @bezbac in https://github.com/langfuse/langfuse/pull/15311

Chores

• chore(deps): bump brace-expansion to 1.1.16, 2.1.2, and 5.0.7 by @nimarb in https://github.com/langfuse/langfuse/pull/15263
• chore(deps): bump body-parser to 1.20.6 by @nimarb in https://github.com/langfuse/langfuse/pull/15266
• docs(agents): add sentry-instrumentation skill (LFE-10974) by @nkabardin in https://github.com/langfuse/langfuse/pull/15249
• docs(agents): Add instructions on when to create storybook stories by @bezbac in https://github.com/langfuse/langfuse/pull/15289
• refactor: Enable knip duplicate export checking + fix issues by @bezbac in https://github.com/langfuse/langfuse/pull/15290
• test(ingestion): red tests for metadata_dropped metric (LFE-14342, LFE-14345) by @niklassemmler in https://github.com/langfuse/langfuse/pull/15269
• chore(web): Re-organize storybook by @bezbac in https://github.com/langfuse/langfuse/pull/15274
• chore(deploy): tag dd-trace telemetry with ECS task_arn via DD_TAGS (LFE-11028) by @niklassemmler in https://github.com/langfuse/langfuse/pull/15286
• refactor(shared): extract analytics score trace-attribute CTE into swappable fragment (LFE-11009) by @niklassemmler in https://github.com/langfuse/langfuse/pull/15297
• refactor(observability): move beforeSend checks into named predicates (LFE-10974) by @nkabardin in https://github.com/langfuse/langfuse/pull/15276
• docs(previews): update debugging guide by @wochinge in https://github.com/langfuse/langfuse/pull/15306

New Contributors

• @claude[bot] made their first contribution in https://github.com/langfuse/langfuse/pull/15271

Full Changelog: https://github.com/langfuse/langfuse/compare/v3.223.0...v3.224.0