+ **08/2025** I'm back to Ithaca after a year on sabbatical! This fall, I'll be teaching [**Category Theory for Computer Scientists (CS 6117)**](https://www.cs.cornell.edu/courses/cs6117/2025fa/). + **08/2025** **SafeTree: Expressive Tree Policies for Microservices** and **A Hoare Logic for Symmetry Properties** will appear at **OOPSLA 2025**. Congrats Karuna and Vaibhav! + **07/2025** I gave two lectures at the [**Cornell, Maryland, Max Planck Pre-doctoral Research School in Computer Science (CMMRS 2025)**](https://cmmrs.mpi-sws.org/) on **Type Systems: Between Theory and Practice**. A lot of fun, thanks for the highly engaged students! + **07/2025** My (first!) PhD student [**Jialu Bao**](https://baojia.lu/about/) has successfully defended her thesis, and will be starting a postdoc at Northeastern with Steven Holtzen. Huge congratulations Jialu!! + **07/2025** **Towards an Axiomatisation of the Neighborhood Monad** will appear at **BMQL 2025**. Congrats to a fantastic group of students and TAs from the [**Adjoint School 2025**](https://adjointschool.com/2025.html): Max, Chase, Jonas, Jón, and Jessica! + **05/2025** **Bean: A Language for Backward Error Analysis** will appear at **PLDI 2025**. Congrats Ariel and Laura! + **01/2025** This semester, I'll be a mentoring a group for the [**Adjoint School 2025**](https://adjointschool.com/2025.html) focused on **Categorical Metric Structures for Numerical Analysis**.