diff --git a/docs/VENDORING.md b/docs/VENDORING.md
index 09a0e3347..89710ff79 100644
--- a/docs/VENDORING.md
+++ b/docs/VENDORING.md
@@ -227,14 +227,14 @@ those packages now resolves to the single root instance. As of this sync,
 
 ## Patched vs. verbatim
 
-Of the eleven vendored paths, four carry local patches:
+Of the twelve vendored paths, four carry local patches:
 `@intx/inference`, `@intx/types`, `@intx/storage-isogit`, and
 `@intx/agent` — every divergence is a real fix not yet upstream, listed
-one-per-patch in that package's `PATCHES.md`. The other seven paths
-(six whole packages plus the partial `vendor/intx-workflow-host/adapters/`
-tree) are verbatim copies of upstream — no modifications. A diff against a
+one-per-patch in that package's `PATCHES.md`. The other eight paths
+(six whole packages plus the two partial `vendor/intx-workflow-host/`
+paths) are verbatim copies of upstream — no modifications. A diff against a
 pristine upstream checkout at the same commit and paths will show 100%
-upstream-authored lines for those seven.
+upstream-authored lines for those eight.
 
 ## Notable upstream shape changes carried by the 2026-08-22 sync
 
diff --git a/vendor/intx-inference/PATCHES.md b/vendor/intx-inference/PATCHES.md
index 3d7b8b897..0461fcd3f 100644
--- a/vendor/intx-inference/PATCHES.md
+++ b/vendor/intx-inference/PATCHES.md
@@ -542,12 +542,16 @@ requires instead of the `thinking:{type:"enabled",budget_tokens}` shape
 adaptive-only models reject. Upstream's list lacks the model. Consumed by the
 `first-class-providers` registry (`claude-fable-5-1` is a shipped, selectable
 anthropic and zen model; CHANGELOG 0.3.17 advertises adaptive thinking for
-Fable 5) and guarded by the "adaptive thinking request shape" suite in
-`providers/anthropic.test.ts`.
+Fable 5). The companion "adaptive thinking request shape" suite that once
+guarded the wire shape in `providers/anthropic.test.ts` was dropped by the
+2026-09-14 pristine overwrite (`5a291aad5`) and never re-applied, so the
+wire shape currently rides without an in-tree guard; only the model id is
+covered, by the first-party `first-class-providers` registry test.
 
 **Disposition:** Re-carryable — a one-line list addition that survives sync
-trivially; the guard suite re-applies verbatim. Risk: upstream may grow its
-own adaptive-models list; reconcile the two on next sync. **Removal path:**
+trivially. Risk: upstream may grow its own adaptive-models list; reconcile
+the two on next sync, and consider restoring the dropped guard suite.
+**Removal path:**
 Upstream adding `claude-fable-5-1` to its own `ADAPTIVE_THINKING_MODELS`.
 
 ---