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Runtime

bunpy’s Python runtime is built on three open-source components:

ComponentRole
gopapyPython 3.14 parser → AST
gocopyAST → CPython 3.14 bytecode
goipyCPython bytecode interpreter (pure Go)

The pipeline is fully in-process: no subprocess, no CPython installation, no GIL. Each bunpy run call compiles and runs in the same OS thread as the CLI.