ADR 0099: a step that runs once names what it reads; issues 077 and 078 resolved; designs 08 and 20 amended

2026-09-21 23:33:47 +02:00
parent c2a81cbb20
commit 0e0f0298c6
8 changed files with 146 additions and 7 deletions
@@ -7,6 +7,7 @@ code:
  - mesh-sdk src
 updated: 2026-09-21
 decisions:
+  - 02-DECISIONS/0099-a-step-that-runs-once-names-what-it-reads.md
  - 02-DECISIONS/0053-a-step-that-runs-on-a-schedule.md
  - 02-DECISIONS/0074-the-wire-is-specified-not-the-types.md
  - 02-DECISIONS/0040-what-a-module-is.md
@@ -198,3 +199,11 @@ one shape this does not protect, and should not be written.
 *How it is checked:* the lab's coupled-pair spike declares exactly this pair, pushes a refused
 file, and asserts the file on disk is the new one, the service serves the old one, and the machine
 reports the push failed.
+
+A `run-once` step may itself name what it reads under `restart-on`; for a step the word means
+*run again* — a step that fetches a fact from a provider names the binding it reads, and runs
+again when the provider moved. The service that consumes what the step made names the step, so it
+is recreated with the new fact
+([ADR 0099](../../02-DECISIONS/0099-a-step-that-runs-once-names-what-it-reads.md)). *How it is
+checked:* the host's unit tests run a step again when its named file changed and not otherwise,
+and recreate a container naming a step after the step ran.