Harness FME Fast and Furious

Over the past six months, we have been hard at work building an integrated experience to take full advantage of the new platform made available after the Split.io merger with Harness. We have shipped a unified Harness UI for migrated Split customers, added enterprise-grade controls for experiments and rollouts, and doubled down on AI to help teams see impact faster and act with confidence. Highlights include OpenFeature providers, Warehouse Native Experimentation (beta), AI Experiment Summaries, rule-based segments, SDK fallback treatments, dimensional analysis support, and new FME MCP tools that connect your flags to AI-assisted IDEs.

And our efforts are being noticed. Just last month, Forrester released the 2025 Forrester Wave™ for Continuous Delivery & Release Automation where Harness was ranked as a leader in part due to our platform approach including CI/CD and FME. This helps us uniquely solve some of the most challenging problems facing DevOps teams today.

A more integrated experience: from Split UI to Harness UI

This year we completed the front-end migration path that moves customers from app.split.io to app.harness.io, giving teams a consistent, modern experience across the Harness platform with no developer code changes required. Day-to-day user flows remain familiar, while admins gain Harness-native RBAC, SSO, and API management with personal access token and service account token support.

What this means for you:

• No more switching UIs for customers who use FME and other Harness products
• No SDK or proxy changes required for production apps. Your flag evaluations continue as before.
• Harness RBAC and SSO now govern FME access. Migrations include clear before and after guides for roles, groups, and SCIM.
• Admin API parity with a documented before and after map and examples for the few endpoints that moved.

For admins, the quick confidence checklist, logging steps, and side-by-side screens make the switch straightforward. FME Settings routes you into the standard Harness RBAC screens for long-term consistency where appropriate.

Built for AI-driven workloads

Two themes shaped our AI investments: explainability and in-flow assist.

• Explainable measurement: AI Summaries help teams move faster from what happened to what should we do, without forcing deep dives into raw statistics.
• AI in the developer loop: FME MCP tools help developers inspect, compare, and adjust flag states without context switching. This shortens the loop between finding an issue and safely changing a treatment.
• Data where you need it: Warehouse Native Experimentation runs analyses where your data already lives, improving transparency and aligning with the way modern AI and analytics teams operate.

To learn more, watch this video! 

Warehouse Native Experimentation (beta)

Warehouse Native Experimentation lets you run analyses directly in your own data warehouse using your assignment and event data for more transparent, flexible measurement. We are pleased to announce that this feature is now available in beta. Customers can request access through their account team and read more about it in our docs.

What else is new in Harness FME

As you can see from all the new features below, we have been running hard and we are accelerating into the turn as we head toward the end of the year. We take pride in the partnerships we have with our customers. As we listen to your concerns, our engineering teams are working hard to implement the features you need to be successful.

October 2025

• FME MCP tools connect feature flags and experiments to AI-assisted IDEs such as Claude Code, Windsurf, Cursor, and VS Code. Explore flags, compare flag definitions, and audit rules conversationally to speed up release workflows.
• OpenFeature providers for Android, iOS, Web, Java, Python, .NET, Node.js, React, and Angular help standardize evaluations and reduce lock-in across services and teams.
• Harness Proxy centralizes and secures outgoing SDK traffic with support for OAuth and mTLS, easing egress-control needs at scale. It also works with other Harness products like Database DevOps.
• Owners as metadata clarifies accountability while edit privileges remain governed by RBAC.

September 2025

• SDK Fallback treatments allow you to avoid unexpected control treatments by offering a centralized, simple and scalable way to set these across your SDKs and applications.
• Experiment entry event filter keeps analysis clean by including only users who actually hit the experiment entry point.

July 2025

• Dimensional analysis on experiments reveals effects by browser, device, region, and more so you can catch segment-level regressions early.
• AI Summarize on experiments and metrics gives fast, accurate summaries for non-technical stakeholders and busy teams.

June 2025

• Rule-based segments target users dynamically using attribute conditions, reducing static list maintenance and simplifying targeting rules reusability.
• Experiment tags improve searchability and at-scale organization.
• Client-side cache controls for Browser, iOS, and Android SDKs let you tune rollout cache expiration and initialization behavior.

Foundation laid earlier in 2025

• Experiments Dashboard for easier setup and multi-treatment analysis.
• Release Agent, rebranded from Switch, adds follow-up Q and A on metric summaries with admin-controlled AI settings.

As always, you can find details on all our new features by reading our release notes.

What customers can expect next

We are excited to add more value for our customers by continuing to integrate Split with Harness to achieve the best of both worlds. Harness CI/CD customers can expect familiar and proven methodologies to show up in FME like pipelines, RBAC, SSO support and more. To see the full roadmap and get a sneak peak at what is coming, reach out to us to schedule a call with your account representative.

Get started

• Attending AWS ReInvent? Come see us at booth #731 and get a live demo.
• Already migrated from Split? Sign in at app.harness.io. If you are an admin, review the RBAC and SSO guides to validate group mappings and SCIM.
• New to Harness FME? Explore the product page and datasheet, then try FME in your environment.

Want the full details? Read the latest FME release notes for all features, dates, and docs.