diff --git a/drift-proposals/anthropic-claude-fable-5-1-new-family.md b/drift-proposals/anthropic-claude-fable-5-1-new-family.md
new file mode 100644
index 00000000..aab34841
--- /dev/null
+++ b/drift-proposals/anthropic-claude-fable-5-1-new-family.md
@@ -0,0 +1,14 @@
+# New / unclassified model family: claude-fable-5-1
+
+Provider: anthropic
+Detected: 2026-09-05
+Status: NEEDS HUMAN REVIEW
+
+This model family appeared in a live /models listing but matches no classification rule (include, exclude, -preview, gemma). drift-sync never silently classifies a new family.
+
+## Decision
+<!-- drift-sync never auto-classifies a new family. To approve adding it to
+     the registry, change the line below to `Decision: include` — the NEXT
+     drift-sync run will then apply the mechanical registry edit (still
+     zero-LLM: this is a human-authored decision, not generated code). -->
+Decision: pending
diff --git a/drift-proposals/gemini-gemini-3.8-flash-new-family.md b/drift-proposals/gemini-gemini-3.8-flash-new-family.md
new file mode 100644
index 00000000..603ae758
--- /dev/null
+++ b/drift-proposals/gemini-gemini-3.8-flash-new-family.md
@@ -0,0 +1,14 @@
+# New / unclassified model family: gemini-3.8-flash
+
+Provider: gemini
+Detected: 2026-09-05
+Status: NEEDS HUMAN REVIEW
+
+This model family appeared in a live /models listing but matches no classification rule (include, exclude, -preview, gemma). drift-sync never silently classifies a new family.
+
+## Decision
+<!-- drift-sync never auto-classifies a new family. To approve adding it to
+     the registry, change the line below to `Decision: include` — the NEXT
+     drift-sync run will then apply the mechanical registry edit (still
+     zero-LLM: this is a human-authored decision, not generated code). -->
+Decision: pending
diff --git a/drift-proposals/gemini-lyria-3.5-new-family.md b/drift-proposals/gemini-lyria-3.5-new-family.md
new file mode 100644
index 00000000..a76e0e1c
--- /dev/null
+++ b/drift-proposals/gemini-lyria-3.5-new-family.md
@@ -0,0 +1,14 @@
+# New / unclassified model family: lyria-3.5
+
+Provider: gemini
+Detected: 2026-09-05
+Status: NEEDS HUMAN REVIEW
+
+This model family appeared in a live /models listing but matches no classification rule (include, exclude, -preview, gemma). drift-sync never silently classifies a new family.
+
+## Decision
+<!-- drift-sync never auto-classifies a new family. To approve adding it to
+     the registry, change the line below to `Decision: include` — the NEXT
+     drift-sync run will then apply the mechanical registry edit (still
+     zero-LLM: this is a human-authored decision, not generated code). -->
+Decision: pending
diff --git a/drift-proposals/openai-gpt-6-astra-new-family.md b/drift-proposals/openai-gpt-6-astra-new-family.md
new file mode 100644
index 00000000..40b83802
--- /dev/null
+++ b/drift-proposals/openai-gpt-6-astra-new-family.md
@@ -0,0 +1,14 @@
+# New / unclassified model family: gpt-6-astra
+
+Provider: openai
+Detected: 2026-09-05
+Status: NEEDS HUMAN REVIEW
+
+This model family appeared in a live /models listing but matches no classification rule (include, exclude, -preview, gemma). drift-sync never silently classifies a new family.
+
+## Decision
+<!-- drift-sync never auto-classifies a new family. To approve adding it to
+     the registry, change the line below to `Decision: include` — the NEXT
+     drift-sync run will then apply the mechanical registry edit (still
+     zero-LLM: this is a human-authored decision, not generated code). -->
+Decision: pending