Cherry Pi harness in Lua and Go: script terminal panes, run tests, drive Rex from one script

sull · x · 2026-11-05

redstarsystems highlights Cherry Pi, a terminal-agent tool built mainly in Lua and Go that pairs with the Rex desktop.

Key points:

Most of Cherry Pi's harness is Lua (managing project layers, jobs, policy checks, receipts), while the Go desktop renders the pane tree and handles keyboard/pointer events—both packed into one executable.
Lua scripts via picache do can manipulate the live desktop: open a test pane beside your code, wait for the process to exit, surface failures, and even open a window in Superlogical Rex and read its screen back.
An official tests.lua example runs the project's Python tests in a side pane; the same Lua process can drive both Cherry Pi and a connected Rex session.

A concrete engineering pattern for wiring agent harnesses, TUIs, and scriptable workflows together.

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