hq/04-ISSUES/075-a-stocked-runtime-image-is-never-rebuilt-by-the-run/01-diagnosis.md

Diagnosis — 2026-09-21

1. The suite rebuilt the host, the control plane's images and the installer before a run, and nothing else; a bed's scenario stocked mesh-runtime-<module>:development from whatever the image store held, built by hand by a script the suite never called.
2. The rule that covers the rest — the run rebuilds what it tests — was extended to these. For the beds named, every runtime their scenarios stock is compared against the module's source in the catalogue and the tool runtime and SDK it is built on; the image is rebuilt where it is older, missing, or the source has uncommitted changes, and a build that fails stops the suite. Proven by removing a runtime image and watching the run rebuild it before the bed passed.

Located in: the lab's rebuild step. The design's rule now says it covers module runtimes, and says how it is checked.