--- title: "Langfuse April Update" description: "Langfuse April Update: 10,000 GitHub Stars, Langfuse User Meetup, Q2 Roadmap Highlights & More!" ogImage: /images/blog/2025-04-30-langfuse-april-update/april-update.png tag: update date: 2025/04/30 author: "Marc" --- April was a big month at Langfuse—here’s everything we shipped and what’s coming next. ## ⭐ 10,000 GitHub Stars ![10,000 GitHub Stars](/images/blog/2025-04-30-langfuse-april-update/10k-github-stars.png) On April 3rd, we crossed the 10k-star milestone. Thank you for helping us build the best open-source observability tool for AI! → If you haven’t yet, [show us some love](https://github.com/langfuse/langfuse). ## 🕹️ Langfuse User Meetup – San Francisco Join us for a Langfuse user meetup in San Francisco! Marc will demo the latest features, and several users will showcase how Langfuse powers their AI products. Plenty of time for Q&A and networking. When: May 12th, 6:30 pm Where: San Francisco (location to be announced) → [Sign up here](https://lu.ma/eydxi5ry) ## 🗺️ Q2 Roadmap Highlights You told us what you need—here’s what we’re building this quarter: - Advanced Evaluation: Session-level scoring; richer evaluation views; LLM-as-judge templates; non-LLM evaluators for CI/CD, rule-based routing - Tracing: Full-text search across traces & sessions; custom dashboards; query API; OpenTelemetry-native SDKs, webhooks & alerts - Agent Observability: Generalised agent graphs; filterable tool calls; opinionated evaluations - Prompt Management: Track prompt variables in prod; LLM-assisted prompt engineering; A/B testing → [See the full public roadmap](https://langfuse.com/docs/roadmap) ## 📈 Configurable Dashboards ![Configurable Dashboards](/images/blog/2025-04-30-langfuse-april-update/configurable-dashboards.png) Being able to create custom dashboards on top of Langfuse data has been one of the [most requested](https://github.com/orgs/langfuse/discussions/1011) features. We've released an initial beta and will add many improvements to this over the next days/weeks. → We showed a [live demo](https://www.youtube.com/watch?feature=shared&t=2191&v=uDsnMaaFzho) during the last community town hall → Please share your thoughts/feedback on this [here](https://github.com/orgs/langfuse/discussions/1011) ## ⚕️ HIPAA Cloud ![HIPAA Cloud](/images/blog/2025-04-30-langfuse-april-update/hipaa.png) We're excited to offer HIPAA-compliant Langfuse Cloud instances! This enables healthcare organizations to safely use Langfuse Cloud while ensuring patient data remains secure and confidential. ## 🛠️ Tool Calling & Structured Outputs ![Tool Calling & Structured Outputs](/images/blog/2025-04-30-langfuse-april-update/tool-call-playground.png) {" "} Ship agents faster: Langfuse now supports tool calling and JSON-typed responses end-to-end in the Playground. You can now fetch real-time data, pass it to your LLM, and render structured outputs in your UI—all while tracing every call. → [Watch the demo](/changelog/2025-03-28-tool-calling-structured-output-playground) ## 👍 Session-Level Scores ![Session-Level Scores](/images/blog/2025-04-30-langfuse-april-update/session-level-scores.png) Langfuse now supports session-level scores, enabling comprehensive evaluation of conversational experiences across multiple interactions rather than just individual traces or observations. → [Learn more](/changelog/2025-04-28-session-level-scores) ## ➕ More April Releases - [Protected Prompt Labels](/changelog/2025-04-02-protected-prompt-labels): Lock critical prompts before they hit production. Admins can now mark prompt labels as protected, preventing accidental edits or deletions. - [Admin API](/changelog/2025-04-15-admin-apis): Automate everything - Organization CRUD, project management, and scoped API keys are now available via Admin API endpoints. - [OpenAI o3, o4-mini](/changelog/2025-04-16-o3-o4-mini-support) & [4.1 support](/changelog/2025-04-15-4.1-support)---same day full compatibility with OpenAI's latest models. - [Copy docs as Markdown](/changelog/2025-04-17-copy-as-markdown)---paste straight into ChatGPT/Cursor and speed up your workflow. --- ## Agent Instructions This page is part of the [Langfuse](https://langfuse.com) documentation, published as plain Markdown for AI agents. Every page is available as Markdown by appending `.md` to its URL, or by sending an `Accept: text/markdown` header. This page: `https://langfuse.com/blog/2025-04-30-langfuse-april-update.md`. ### Querying these docs If the answer is not on this page, query the documentation instead of guessing: - **Semantic search** across all Langfuse docs, returning an answer with the relevant pages and excerpts. Ask a specific, self-contained question: ```bash curl -sG "https://langfuse.com/api/search-docs" --data-urlencode "query=How do I trace a LangGraph agent?" ``` - **Index of every page**: , with per-section indexes [llms-docs.txt](https://langfuse.com/llms-docs.txt), [llms-integrations.txt](https://langfuse.com/llms-integrations.txt), and [llms-self-hosting.txt](https://langfuse.com/llms-self-hosting.txt). ### Before writing Langfuse code - **Install the [Langfuse Agent Skill](https://langfuse.com/docs/api-and-data-platform/features/agent-skill).** It encodes Langfuse's own best practices for instrumentation, prompt management, and evaluation, and materially improves results. - **Read [What does a good trace look like?](https://langfuse.com/docs/observability/best-practices.md)** before instrumenting an application. - **Verify endpoints, parameters, and response fields** against the [API reference](https://api.reference.langfuse.com) instead of inferring them from code examples. - **Use the [Langfuse CLI](https://langfuse.com/docs/api-and-data-platform/features/cli)** (`npx langfuse-cli api `) to read or write traces, prompts, datasets, and scores from the terminal. 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