Experiments public API ships; batch deletion handles 1M+ items

What's Changed

Features

• feat(v4): redesign migration audit page by @maxdeichmann in https://github.com/langfuse/langfuse/pull/14793
• feat(api-keys): track creator of project and org API keys by @Steffen911 in https://github.com/langfuse/langfuse/pull/14724
• feat(web): move time range + auto-refresh selectors next to page title by @nmtrang29 in https://github.com/langfuse/langfuse/pull/14765
• feat(api): add experiments public API by @wochinge in https://github.com/langfuse/langfuse/pull/14579
• feat(web): move time range + auto-refresh selectors next to page title by @nmtrang29 in https://github.com/langfuse/langfuse/pull/14765
• feat(web): enable Select Observations entry point in dataset onboarding by @hassiebp in https://github.com/langfuse/langfuse/pull/14828

Fixes

• fix: respect NEXT_PUBLIC_BASE_PATH in Slack OAuth URLs by @chelsealong in https://github.com/langfuse/langfuse/pull/12953
• fix(ci): deflake dataset-run-delete test and cut slow-test log noise by @wochinge in https://github.com/langfuse/langfuse/pull/14801
• fix: make batch action trace delete capable of handling 1mil+ actions by @sumerman in https://github.com/langfuse/langfuse/pull/14776
• fix(otel): do not cost AI SDK agent spans that duplicate model-call usage by @hassiebp in https://github.com/langfuse/langfuse/pull/14808
• fix(assistant): fix error bubble bottom spacing (LFE-10704) by @LysanderKie in https://github.com/langfuse/langfuse/pull/14831
• fix(mcp): omit Unicode regex from score config tool JSON schemas by @LysanderKie in https://github.com/langfuse/langfuse/pull/14818

Chores

• chore(web): replace langfuse-logo test fixture with updated logo by @wochinge in https://github.com/langfuse/langfuse/pull/14800
• refactor(web): Enable react/jsx-curly-brace-presence by @bezbac in https://github.com/langfuse/langfuse/pull/14803
• chore(deps): bump next-auth to 4.24.14 by @nimarb in https://github.com/langfuse/langfuse/pull/14484
• chore(web): Enforce no-nested-ternary for design-system folder by @bezbac in https://github.com/langfuse/langfuse/pull/14807
• docs(agents): require evidence-backed completion reports by @wochinge in https://github.com/langfuse/langfuse/pull/14809
• ci: Build storybook after running tests by @bezbac in https://github.com/langfuse/langfuse/pull/14810
• chore: bump metrics v2 limits on cloud plans by @sumerman in https://github.com/langfuse/langfuse/pull/14817
• chore(deps): bump pnpm to 11.10.0 by @nimarb in https://github.com/langfuse/langfuse/pull/14806
• ci: warm main-scoped pnpm and turbo caches on a schedule by @wochinge in https://github.com/langfuse/langfuse/pull/14820
• ci: unpin pnpm version in cache warmer by @wochinge in https://github.com/langfuse/langfuse/pull/14823
• chore(web): Fix sentry deprecation warnings by @bezbac in https://github.com/langfuse/langfuse/pull/14814
• chore(fetch-llm-completion): add AI SDK OpenAI adapter by @hassiebp in https://github.com/langfuse/langfuse/pull/14791
• refactor(agent): Replace switch statements with exhaustive if conditions by @bezbac in https://github.com/langfuse/langfuse/pull/14829
• chore(skill): bump pnpm up by @nimarb in https://github.com/langfuse/langfuse/pull/14839
• chore: improve error handling in batch deletion by @sumerman in https://github.com/langfuse/langfuse/pull/14837
• chore(filters): trace more langfuse metadata by @nimarb in https://github.com/langfuse/langfuse/pull/14841
• chore: metrics v2 hourly quotas by @sumerman in https://github.com/langfuse/langfuse/pull/14840

New Contributors

• @chelsealong made their first contribution in https://github.com/langfuse/langfuse/pull/12953
• @nmtrang29 made their first contribution in https://github.com/langfuse/langfuse/pull/14765
• @LysanderKie made their first contribution in https://github.com/langfuse/langfuse/pull/14831

Full Changelog: https://github.com/langfuse/langfuse/compare/v3.205.1...v3.206.0