The frontmatter exists to be machine-read. Two shapes this template
suggested do not parse, so any ADR that copied them dropped silently out of
every "what is still open?" query while looking correct:
supersedes: - a bare dash is a YAML sequence entry
deciders: pending: Mathias the unquoted second colon reads as a
nested mapping
Both were found live during an estate-wide ADR survey on 2026-09-05:
openbanking-api ADR-0001 (the one genuinely open decision in the estate --
invisible to the survey until fixed) and infra ADR-0019, each copied
verbatim from here.
Template corrected to `null` and a quoted `"pending: <name>"`, plus a short
section after the fence explaining why and giving a one-line yaml.safe_load
check to run before committing. The explanation is deliberately OUTSIDE the
fenced block so it is not copied into the ADR being written.