Version 0.40.0

Features

lager install uses the pre-built box image for a release tag. Installing a published release now pulls the box image instead of building it on the box, taking a fresh install from roughly fourteen minutes to about two. An install always paid the full cold-build cost, because the deployment clears the builder cache before it starts. On by default; pass --no-pull to build on the box instead. Branch targets such as main have no published image and still build.
A Rigol MSO5204’s logic channel can now have a net. lager instruments accepts a logic net on the MSO5204, and the role tables are asserted to agree.
lager logic measure, trigger and cursor work. All sixteen subcommands dispatch to the script that implements them, rather than to a path that did not exist.

lager python --timeout now stops the script. The deadline reached the box but sent only SIGTERM, so a script blocked in an uninterruptible call — a pyvisa, libusb or serial read, which is the normal case on a box — or one with its own handler ran on regardless. The deadline now escalates to SIGKILL after the cleanup grace window.
A script killed by its timeout reports 137 instead of 247.
--timeout above the box’s ceiling says so instead of quietly running a shorter deadline, which read as the timeout firing early.
A failed Docker install step names the command that failed. The step ran eight commands behind one generic error, four of which print nothing on success, so a failure left a transcript that simply stopped. Each command now reports itself and its exit status, and the printed recovery instructions match the commands the step actually runs.
ssh_t no longer prints ssh’s own errors out of order, so an error and the message explaining it stay together in the transcript.
A deliberate ctx.exit() is no longer reported as a crash, and no longer has its exit code rewritten to 1. The visible case was lager update --check against a box whose SSH key is not set up.
A CI job is no longer refused by its own box lock.
The host CLI installs to ~/.lager_venv.
A command that dispatches to a missing helper script now says so, instead of failing later with something unrelated.

A Getting Started guide covering box setup end to end — nine pages spanning setting up a Lager Box, adding your first box, instruments, nets, a first test, a glossary and troubleshooting, including the sudo behaviour operators hit on Ubuntu 25.10 and newer.
The box’s MCP server is ported to MCP Python SDK v2, and the mcp version ceiling is lifted.
mcp is a direct test requirement, rather than arriving transitively.

To install this version:

pip install lager-cli==0.40.0

To upgrade from a previous version:

pip install --upgrade lager-cli