Merge pull request 'Issues 219-221: the builder's ordering gaps' (#341) from issues/219-221-the-builder into main

04-ISSUES/219-an-older-build-that-finishes-later-replaces-a-newer-one/00-report.md

@@ -0,0 +1,37 @@
+---
+status: diagnosing
+opened: 2026-10-04
+located-in:
+  - mesh-controller
+fixed-by:
+amended-design:
+---
+
+# 219 — An older build that finishes later replaces a newer one
+
+## What was observed
+
+2026-10-03. Two merges to the runtime module came minutes apart. Each plan asked for every module
+built on the runtime image to be rebuilt. One module's two builds were of the same source and
+differed only in the runtime image they stood on:
+
+| Build | Requested | Finished | Stood on |
+|---|---|---|---|
+| asked by the first plan | 21:33 | 22:04 | the runtime image before the fix |
+| asked by the second plan | 21:49 | 21:56 | the runtime image with the fix |
+
+The older request finished last, and its image became the module's current artifact. The next push
+deployed it, and the module's runtime crash-looped on a fault the newer image had already fixed
+([issue 218](../218-a-mesh-seat-is-answered-by-a-module-that-does-not-hold-it/00-report.md)).
+
+## Why it matters beyond this instance
+
+Which build is current should follow what it was built from, not which build machine was slowest.
+Whenever two plans overlap, which happens on any busy evening, a fix can be silently reverted by a
+build that started before it existed. Every passing check still passes.
+
+## Where to look
+
+How a finished build is recorded and how a module's current artifact is chosen. **How it is checked:**
+a test in which an older request completes after a newer one for the same artifact, and the newer
+stays current.

04-ISSUES/220-a-delivered-bundle-keeps-the-files-of-the-one-before/00-report.md

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+---
+status: open
+opened: 2026-10-04
+located-in: []
+fixed-by:
+amended-design:
+---
+
+# 220 — A delivered bundle keeps the files of the one before
+
+## What was observed
+
+2026-10-04. A tools bundle was rebuilt as one self-contained file per entrypoint
+([ADR 0193](../../02-DECISIONS/0193-every-bundle-the-runtime-serves-is-launched-and-the-runtime-knows-no-language.md)),
+so it no longer carries a package directory. On the machine it was delivered to, its directory still
+held the package directory and a compiled file from the earlier delivery, dated hours before the
+new files. The new files were written over the old directory, and nothing removed what the new
+bundle no longer contains.
+
+## Why it matters beyond this instance
+
+A bundle on disk should be exactly the artifact that was built. Leftover files can be imported by
+code that should no longer find them. A fix that removes a file then works on a fresh machine and
+fails on every machine that ran an earlier version. It also makes "what runs here" impossible to
+read from the artifact.
+
+## Where to look
+
+How the host unpacks a bundle into its directory. **How it is checked:** deliver a bundle, then a
+version without one of its files, and the file is gone.

04-ISSUES/221-a-build-machine-learns-a-new-builder-only-from-a-push/00-report.md

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+---
+status: open
+opened: 2026-10-04
+located-in: []
+fixed-by:
+amended-design:
+---
+
+# 221 — A build machine learns a new builder only from a push
+
+## What was observed
+
+2026-10-04. A controller merge changed how TypeScript bundles are built: one file per entrypoint
+instead of a package directory. Its plan finished, and six bundles were rebuilt right after. They
+came out in the old shape, because the build machines still ran the previous builder. They got the
+new one only from the next push. Rebuilt after that push, the same six came out right.
+
+The same order showed in the bus grants the same night. A push sent while the controller was still
+the previous build composed grants with the previous code. A second push was needed after the new
+controller had started.
+
+## Why it matters beyond this instance
+
+A merge to the controller is not in effect when its plan says done. Anything built or pushed in the
+gap uses the old code and looks current. Today only the operator knows to push first and build
+second, and even the operator forgot.
+
+## Where to look
+
+Whether a controller plan should end by delivering itself to the build machines and the control
+machine, or whether a build should refuse a builder older than the controller that asked for it.
+**How it is checked:** after a controller merge, a build asked right after its plan finishes runs
+the new builder.