Function Mesh Implementation

FunctionMesh is a Kubernetes-native platform that automatically breaks a polyglot monolith apart into a distributed auto-scaled function mesh. Currently, making a polyglot codebase distributed requires service boundaries to be manually defined, RPC layers to be hand-coded, and routing configurations that have nothing to do with the actual problem being solved. FunctionMesh takes a program analysis approach to solve this problem by consuming the AST, call graphs, and data flow output of the MetaCall parser to automatically determine the deployment topology, group communicating functions into co-located namespaces, detect type mismatches at build time, and create the entire RPC layer for the user without any intervention. The functions are then packaged using the Builder CLI into a self-contained unit called a FunctionImage containing MetaCall core and the correct language loader, deployed as a FunctionUnit CRD onto a Kubernetes cluster, and connected using Istio Ambient Mesh for transparent routing, mutual TLS, and autoscaling independence. The output is the FunctionMesh Operator, Builder CLI, MetaCall RPC Gateway, Client Stub Generator, Istio Integration, Function Registry, Autoscaler Policy, and complete documentation with end-to-end demo.