Release Train

Build, test, verify, and roll back without production impact. This is the discipline that keeps the platform ship-shaped.

The deployment path is part of the product. If the release process is weak, the product is weak.

No-regression gatesReversible movesDeployment evidence

What this proves

Run smoke tests before and after every meaningful move.

Keep rollback steps documented and reversible.

Separate build confidence from production confidence.

Open-source stack

PlaywrightJestHealth probesCanary checksRollback manifestsGit ops

Experience mode

Step 1

Code

Step 2

Build

Step 3

Compile

Step 4

Artifact

Build stage

A clean build is the first sign of a controlled release.

Live pattern

Engineering lens

A build should prove the shape of the change.
Cheap validation belongs as early as possible.
The output should be deterministic enough to trust.

Platform fit

This project belongs in Llewellyn Systems because it turns a repeated engineering pattern into a governed operating asset. The page is not a slide deck. It is a proof surface for how the system is built and how it behaves.

Toolchain note

Use JupyterBook for publication, MyST for source text, Voilà for notebook apps, Binder for reproducible environments, and JupyterLab or Colab for interactive editing. The page itself is the front door to that workflow.

Related projects

Skills + MCP