diff --git a/changed_files.json b/changed_files.json
index 2baefa4..5e7d6e7 100644
--- a/changed_files.json
+++ b/changed_files.json
@@ -1,3 +1,11 @@
 [
-  "R/ARMA.R"
+  "DESCRIPTION",
+  "NNS_13.1.tar.gz",
+  "NNS_13.1.zip",
+  "R/ARMA.R",
+  "R/ARMA_optim.R",
+  "R/Multivariate_Regression.R",
+  "R/NNS_VAR.R",
+  "R/Regression.R",
+  "R/Stack.R"
 ]
diff --git a/sync/last_live_r_parity_report.md b/sync/last_live_r_parity_report.md
index 09eb22d..9c5c9de 100644
--- a/sync/last_live_r_parity_report.md
+++ b/sync/last_live_r_parity_report.md
@@ -6,9 +6,10 @@
 - Skip install: `False`
 - Live R recompute: `True`
 
-## Result: live R parity diverged
+## Result: manual review required
 
-Mapped parity tests recomputed every R value from the freshly installed live R NNS and the Python implementation did not match. Public Python behavior differs from live R at the recorded commit.
+The plan reports unmapped R files. A human must extend `sync/r_api_map.json` before automated parity can run:
 
-Failing command: `/opt/hostedtoolcache/Python/3.11.15/x64/bin/python -m pytest -q -n 0 tests/parity/test_practical_examples.py tests/parity/test_r13_smoke.py`
-Exit status: `1`
+- `R/ARMA_optim.R`
+- `R/Multivariate_Regression.R`
+- `R/NNS_VAR.R`
diff --git a/sync/last_r_api_inspection.md b/sync/last_r_api_inspection.md
index 79defb7..c596a57 100644
--- a/sync/last_r_api_inspection.md
+++ b/sync/last_r_api_inspection.md
@@ -2,14 +2,30 @@
 
 ## Changed files
 
+- `DESCRIPTION`
+- `NNS_13.1.tar.gz`
+- `NNS_13.1.zip`
 - `R/ARMA.R`
+- `R/ARMA_optim.R`
+- `R/Multivariate_Regression.R`
+- `R/NNS_VAR.R`
+- `R/Regression.R`
+- `R/Stack.R`
 
 ## Affected Python modules
 
+- `pyproject.toml`
 - `src/nns/arma.py`
+- `src/nns/multivariate_regression.py`
+- `src/nns/regression.py`
+- `src/nns/stack.py`
+- `tests/_r_cache.json`
+- `tools/NNS`
 
 ## Parity tests to run
 
+- `tests/docs/test_vignette_examples.py`
+- `tests/parity`
 - `tests/parity/test_practical_examples.py`
 - `tests/parity/test_r13_smoke.py`
 
@@ -17,10 +33,19 @@
 
 - `NNS.ARMA`
 - `NNS.ARMA.optim`
+- `NNS.M.reg`
 - `NNS.VAR`
+- `NNS.reg`
+- `NNS.stack`
 
 ## Required actions
 
-- Fresh cache required: `False`
+- Fresh cache required: `True`
 - Export review required: `False`
-- Unmapped R files present: `False`
+- Unmapped R files present: `True`
+
+## Unmapped R files
+
+- `R/ARMA_optim.R`
+- `R/Multivariate_Regression.R`
+- `R/NNS_VAR.R`
diff --git a/sync/last_r_api_plan.json b/sync/last_r_api_plan.json
index 6fef8d5..48ae347 100644
--- a/sync/last_r_api_plan.json
+++ b/sync/last_r_api_plan.json
@@ -1,22 +1,45 @@
 {
   "changed_files": [
-    "R/ARMA.R"
+    "DESCRIPTION",
+    "NNS_13.1.tar.gz",
+    "NNS_13.1.zip",
+    "R/ARMA.R",
+    "R/ARMA_optim.R",
+    "R/Multivariate_Regression.R",
+    "R/NNS_VAR.R",
+    "R/Regression.R",
+    "R/Stack.R"
   ],
   "affected_python_modules": [
-    "src/nns/arma.py"
+    "pyproject.toml",
+    "src/nns/arma.py",
+    "src/nns/multivariate_regression.py",
+    "src/nns/regression.py",
+    "src/nns/stack.py",
+    "tests/_r_cache.json",
+    "tools/NNS"
   ],
   "parity_tests": [
+    "tests/docs/test_vignette_examples.py",
+    "tests/parity",
     "tests/parity/test_practical_examples.py",
     "tests/parity/test_r13_smoke.py"
   ],
   "cache_scope": [
     "NNS.ARMA",
     "NNS.ARMA.optim",
-    "NNS.VAR"
+    "NNS.M.reg",
+    "NNS.VAR",
+    "NNS.reg",
+    "NNS.stack"
   ],
-  "requires_fresh_cache": false,
+  "requires_fresh_cache": true,
   "requires_export_review": false,
-  "has_unmapped_r_files": false,
-  "unmapped_r_files": [],
+  "has_unmapped_r_files": true,
+  "unmapped_r_files": [
+    "R/ARMA_optim.R",
+    "R/Multivariate_Regression.R",
+    "R/NNS_VAR.R"
+  ],
   "warnings": []
 }
diff --git a/upstream/NNS b/upstream/NNS
index 7250bb6..840f5fe 160000
--- a/upstream/NNS
+++ b/upstream/NNS
@@ -1 +1 @@
-Subproject commit 7250bb627d12f6cdb1dbe60a8b8e50385e2a7c41
+Subproject commit 840f5fe9471439704fda1dd9e3b97f391b38b2f7