Best Byte AI
Mac agent infrastructure
Native Swift control for Python agents on macOS.
SwiftPython Commercial packages a signed CPython worker sidecar, actor-isolated ProcessPool, typed remote handles, shared-memory streaming, reentrant callbacks, and VM-capable isolation into the runtime layer behind SiriusAgent and SiriusMsg.
Public runtime layer
Most Swift-to-Python bridges put CPython inside the app process and leave the product with one interpreter, one GIL, and one crash domain. SwiftPython keeps the fast in-process path, then adds a worker runtime for package-heavy agent work.
The public commercial package ships the runtime API, worker sidecar, VM worker scripts, entitlement templates, runnable examples, and integration docs that Best Byte AI products depend on.
ProcessPool substance
PyHandle and OwnedPyHandle let Swift hold references to Python objects that live in worker processes, with generation tracking and stale-handle safety instead of pretending remote objects are local values.
PythonProcessPool runs Python work in separate worker processes, so CPU-bound packages and native extensions do not inherit the host app's entire crash surface.
The pool moves beyond request-response calls with binary-framed IPC, side-channel setup, stream events, progress, out-of-band buffers, and callback paths that Python can use to call back into Swift.
evalEvents streamsThe runtime is packaged for applications: binary framework, sidecar worker, VM worker scripts, entitlement templates, examples, app-bundle guidance, and the preflight docs needed to ship it.
SwiftPythonWorkerSandboxPoolRuntime boundary
SwiftUI and AppKit product surfaces, local sockets, permissions, signing, notarization, login items, and user-facing controls.
Actor-isolated pool management, handles, streams, callbacks, events, and generated Swift wrappers over Python packages.
Sidecar processes or VM tenants that run package-heavy code away from the host app's permission and crash boundary.
Shipping proof
SiriusAgent and SiriusMsg use the same product rule: keep privileged Mac behavior native, and run agent logic through explicit SwiftPython boundaries.
The binary package for app builders: runtime XCFramework, worker sidecar, VM scripts, entitlement templates, examples, and API guide.
Use the runtime package
Native agent host
A Mac agent host built on SwiftPython for providers, tools, browser work, memory, sandboxing, and local execution.
Read the runtime boundary
Public release
A signed local Apple Messages bridge for AI agents with explicit allowlists, a background agent, local service boundary, and signed update feed.
View SiriusMsg