diff --git a/INTENT.md b/INTENT.md
index a63f704..051c735 100644
--- a/INTENT.md
+++ b/INTENT.md
@@ -2,7 +2,6 @@
 layer: Staff
 role: null
 security_layer_declaration: layer.yaml
-standard_version: "0.7"
 declared_at: "2026-09-09"
 ---
 
diff --git a/layer.yaml b/layer.yaml
index d9ef9b6..4e45f87 100644
--- a/layer.yaml
+++ b/layer.yaml
@@ -1,4 +1,12 @@
-# railiance-platform — NetKingdom security layer declaration
+# railiance-platform — DERIVED form of the NetKingdom security layer declaration
+#
+# THIS FILE DOES NOT GOVERN. The declaration is the `layer:` key in INTENT.md's
+# frontmatter; this file is a derived artifact under §11's derived-artifact rule
+# and must agree with it (GH-DEC-2026-017 §1, amendment A11). Comparison of the
+# §3 vocabulary is ASCII case-insensitive (GH-DEC-2026-017 §2): INTENT.md's
+# `Staff` and this file's `staff` are the same value and neither is re-spelled.
+# A disagreement that survives the fold is a finding, reported, not resolved
+# away by precedence.
 #
 # Framework: net-kingdom/canon/standards/security-layer-model_v0.7.md
 # Companion: net-kingdom/SECURITY-COMPANION.md
@@ -13,7 +21,15 @@
 
 schema_version: "0.1"
 framework: netkingdom-security-layer-model
-standard_version: "0.7"
+
+# §11 derived-artifact marking (GH-DEC-2026-017 §1 / A11).
+derived: true
+derived_from: INTENT.md
+
+# No `standard_version` key: a layer declaration MUST NOT carry a standard
+# version (GH-DEC-2026-017, amendment A12). Version-scoped state belongs in the
+# derived conformance record, which this repository does not yet produce (see
+# gaps.conformance-check-script).
 repository: railiance-platform
 layer: staff
 role: null