diff --git a/drift-proposals/anthropic-claude-3-5-haiku-deprecated-referenced.md b/drift-proposals/anthropic-claude-3-5-haiku-deprecated-referenced.md
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@@ -0,0 +1,7 @@
+# Deprecated-but-still-referenced model family: claude-3-5-haiku
+
+Provider: anthropic
+Detected: 2026-08-07
+Status: NEEDS HUMAN REVIEW
+
+This family no longer appears in the live /models listing, but aimock's own source still references it (builders, DEFAULT_MODELS, or fixtures). drift-sync never silently removes a still-referenced family.
diff --git a/drift-proposals/anthropic-claude-3-5-sonnet-deprecated-referenced.md b/drift-proposals/anthropic-claude-3-5-sonnet-deprecated-referenced.md
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+++ b/drift-proposals/anthropic-claude-3-5-sonnet-deprecated-referenced.md
@@ -0,0 +1,7 @@
+# Deprecated-but-still-referenced model family: claude-3-5-sonnet
+
+Provider: anthropic
+Detected: 2026-08-07
+Status: NEEDS HUMAN REVIEW
+
+This family no longer appears in the live /models listing, but aimock's own source still references it (builders, DEFAULT_MODELS, or fixtures). drift-sync never silently removes a still-referenced family.
diff --git a/drift-proposals/anthropic-claude-3-7-sonnet-deprecated-referenced.md b/drift-proposals/anthropic-claude-3-7-sonnet-deprecated-referenced.md
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+++ b/drift-proposals/anthropic-claude-3-7-sonnet-deprecated-referenced.md
@@ -0,0 +1,7 @@
+# Deprecated-but-still-referenced model family: claude-3-7-sonnet
+
+Provider: anthropic
+Detected: 2026-08-07
+Status: NEEDS HUMAN REVIEW
+
+This family no longer appears in the live /models listing, but aimock's own source still references it (builders, DEFAULT_MODELS, or fixtures). drift-sync never silently removes a still-referenced family.
diff --git a/drift-proposals/anthropic-claude-3-haiku-deprecated-referenced.md b/drift-proposals/anthropic-claude-3-haiku-deprecated-referenced.md
new file mode 100644
index 00000000..fd255192
--- /dev/null
+++ b/drift-proposals/anthropic-claude-3-haiku-deprecated-referenced.md
@@ -0,0 +1,7 @@
+# Deprecated-but-still-referenced model family: claude-3-haiku
+
+Provider: anthropic
+Detected: 2026-08-07
+Status: NEEDS HUMAN REVIEW
+
+This family no longer appears in the live /models listing, but aimock's own source still references it (builders, DEFAULT_MODELS, or fixtures). drift-sync never silently removes a still-referenced family.
diff --git a/drift-proposals/anthropic-claude-3-opus-deprecated-referenced.md b/drift-proposals/anthropic-claude-3-opus-deprecated-referenced.md
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index 00000000..093cd082
--- /dev/null
+++ b/drift-proposals/anthropic-claude-3-opus-deprecated-referenced.md
@@ -0,0 +1,7 @@
+# Deprecated-but-still-referenced model family: claude-3-opus
+
+Provider: anthropic
+Detected: 2026-08-07
+Status: NEEDS HUMAN REVIEW
+
+This family no longer appears in the live /models listing, but aimock's own source still references it (builders, DEFAULT_MODELS, or fixtures). drift-sync never silently removes a still-referenced family.
diff --git a/drift-proposals/anthropic-claude-3-sonnet-deprecated-referenced.md b/drift-proposals/anthropic-claude-3-sonnet-deprecated-referenced.md
new file mode 100644
index 00000000..5fb5cf2d
--- /dev/null
+++ b/drift-proposals/anthropic-claude-3-sonnet-deprecated-referenced.md
@@ -0,0 +1,7 @@
+# Deprecated-but-still-referenced model family: claude-3-sonnet
+
+Provider: anthropic
+Detected: 2026-08-07
+Status: NEEDS HUMAN REVIEW
+
+This family no longer appears in the live /models listing, but aimock's own source still references it (builders, DEFAULT_MODELS, or fixtures). drift-sync never silently removes a still-referenced family.
diff --git a/drift-proposals/anthropic-claude-haiku-4-deprecated-referenced.md b/drift-proposals/anthropic-claude-haiku-4-deprecated-referenced.md
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index 00000000..425bbcb4
--- /dev/null
+++ b/drift-proposals/anthropic-claude-haiku-4-deprecated-referenced.md
@@ -0,0 +1,7 @@
+# Deprecated-but-still-referenced model family: claude-haiku-4
+
+Provider: anthropic
+Detected: 2026-08-07
+Status: NEEDS HUMAN REVIEW
+
+This family no longer appears in the live /models listing, but aimock's own source still references it (builders, DEFAULT_MODELS, or fixtures). drift-sync never silently removes a still-referenced family.
diff --git a/drift-proposals/anthropic-claude-opus-4-1-deprecated-unreferenced.md b/drift-proposals/anthropic-claude-opus-4-1-deprecated-unreferenced.md
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index 00000000..1a26a124
--- /dev/null
+++ b/drift-proposals/anthropic-claude-opus-4-1-deprecated-unreferenced.md
@@ -0,0 +1,20 @@
+# Deprecated zero-reference model family — removal PROPOSED, not applied: claude-opus-4-1
+
+Provider: anthropic
+Detected: 2026-08-07
+Status: NEEDS HUMAN REVIEW
+
+"claude-opus-4-1" no longer appears in the live /models listing and nothing in aimock's own source still references it, so removing it from includeFamilies.anthropic is mechanically safe. drift-sync does not apply it: that set's membership is checksum-pinned, and re-pinning is a reviewed human decision the sync's own changed-file allowlist forbids it from making.
+
+## How to apply
+
+1. Delete the `"claude-opus-4-1"` entry from `includeFamilies.anthropic` in
+   `src/__tests__/drift/model-registry.ts`.
+2. Re-pin `DATA_FROZEN["includeFamilies.anthropic"]` in
+   `src/__tests__/drift/logic-pin.test.ts` with the new membership checksum.
+3. Delete this note file.
+
+All three belong in ONE reviewed commit: step 1 without step 2 leaves the
+membership pin red, and step 2 without step 1 is a silent canary-silencing edit.
+That deliberate, reviewed re-pin is a decision the pin reserves for a human, which
+is exactly why drift-sync proposes this removal instead of applying it.
diff --git a/drift-proposals/anthropic-claude-opus-4-deprecated-referenced.md b/drift-proposals/anthropic-claude-opus-4-deprecated-referenced.md
new file mode 100644
index 00000000..6c4f7cce
--- /dev/null
+++ b/drift-proposals/anthropic-claude-opus-4-deprecated-referenced.md
@@ -0,0 +1,7 @@
+# Deprecated-but-still-referenced model family: claude-opus-4
+
+Provider: anthropic
+Detected: 2026-08-07
+Status: NEEDS HUMAN REVIEW
+
+This family no longer appears in the live /models listing, but aimock's own source still references it (builders, DEFAULT_MODELS, or fixtures). drift-sync never silently removes a still-referenced family.
diff --git a/drift-proposals/anthropic-claude-sonnet-4-deprecated-referenced.md b/drift-proposals/anthropic-claude-sonnet-4-deprecated-referenced.md
new file mode 100644
index 00000000..80f678da
--- /dev/null
+++ b/drift-proposals/anthropic-claude-sonnet-4-deprecated-referenced.md
@@ -0,0 +1,7 @@
+# Deprecated-but-still-referenced model family: claude-sonnet-4
+
+Provider: anthropic
+Detected: 2026-08-07
+Status: NEEDS HUMAN REVIEW
+
+This family no longer appears in the live /models listing, but aimock's own source still references it (builders, DEFAULT_MODELS, or fixtures). drift-sync never silently removes a still-referenced family.