diff --git a/TODO.sota/74-d2-spec-release.md b/TODO.sota/74-d2-spec-release.md
index f4fd849a..39d8214a 100644
--- a/TODO.sota/74-d2-spec-release.md
+++ b/TODO.sota/74-d2-spec-release.md
@@ -1,6 +1,11 @@
 # WO74 — D2: IS-1/ISC as a citable standard
 
-Status: PLANNED · Depends WO60
+Status: BLOCKED-ON-A4 (2026-10-21 finding): the IS-1 spec DOCUMENT
+does not exist in any repo — TODOs across interscript-ruby reference
+`spec/isc/document.adoc` but only `spec/isc/parser_spec.rb` and the
+grammar sources (`spec/isc/grammar*`) are committed. The A4 semantics
+work is therefore the AUTHORING of the spec document from the grammar,
+not an edit of an existing one; D2 releases its output.
 Goal: versioned spec releases with a citation block; the spec becomes
 an artifact others implement against.
 Method: IS-1 v2 (WO60) tagged as spec release v2.0 on the canonical