#1365's fail-loud guard reused the parser's own D- grammar as its evidence test, so a populated <decisions> block using any other ID prefix (e.g. D5-01) was invisible to both parser and guard, collapsing could-not-parse into a clean none-present pass. Add an ID-shaped bold-lead-in probe as format-agnostic evidence on both parse paths; empty/prose scaffolds stay none-present. Graduates the #2371 d5-prefix representative fixture to its expected* assertion.
Closes#2347. Admin-merged (self-review bypass) with full green CI.
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