diff --git a/check-linuxcnc-workstreams-source-map.sh b/check-linuxcnc-workstreams-source-map.sh
index 20fd160..bf7d258 100755
--- a/check-linuxcnc-workstreams-source-map.sh
+++ b/check-linuxcnc-workstreams-source-map.sh
@@ -41,13 +41,26 @@ grep -F 'must not add CNC' docs/linuxcnc-workstreams-source-map.md >/dev/null
 grep -F 'temporary smoke parser' docs/linuxcnc-workstreams-source-map.md >/dev/null
 grep -F 'Every active workstream must have at least one source-map document and guard' \
     docs/linuxcnc-workstreams-source-map.md >/dev/null
+grep -F 'docs/linuxcnc-source-policy.md` must keep the same one-context workflow' \
+    docs/linuxcnc-workstreams-source-map.md >/dev/null
 grep -F 'Browser filesystem persistence remains OPFS-only.' docs/linuxcnc-workstreams-source-map.md >/dev/null
 grep -F 'Smoke coverage remains verification only' docs/linuxcnc-workstreams-source-map.md >/dev/null
+grep -F 'Keep the change inside one active workstream context unless a dependency is' \
+    docs/linuxcnc-source-policy.md >/dev/null
+grep -F 'Each pass should advance one reasonable, reviewable context.' \
+    docs/linuxcnc-source-policy.md >/dev/null
+grep -F 'Smoke tests are verification guardrails. They must not be expanded with new' \
+    docs/linuxcnc-source-policy.md >/dev/null
+grep -F 'Do not mix generator/table work, manifests, OPFS/browser work, and build' \
+    docs/linuxcnc-source-policy.md >/dev/null
+grep -F 'Browser-side wasm filesystem behavior must use OPFS-backed storage.' \
+    docs/linuxcnc-source-policy.md >/dev/null
 
 python3 - <<'PY'
 from pathlib import Path
 
 doc = Path("docs/linuxcnc-workstreams-source-map.md").read_text(encoding="utf-8")
+policy = Path("docs/linuxcnc-source-policy.md").read_text(encoding="utf-8")
 expected = {
     "switchkins/remap": [
         "docs/linuxcnc-switchkins-remap-source-map.md",
@@ -87,6 +100,16 @@ expected = {
 for workstream, paths in expected.items():
     if workstream not in doc:
         raise SystemExit(f"missing workstream row in docs/linuxcnc-workstreams-source-map.md: {workstream}")
+    policy_terms = {
+        "switchkins/remap": ["switchkins/remap", "M428/M429/M430"],
+        "linuxcnc-kinematics": ["kinematics manifest", "RTCP coverage"],
+        "WASM filesystem and OPFS persistence": ["OPFS", "filesystem"],
+        "browser app integration": ["Browser app", "wasm bridge"],
+        "Node and browser smoke coverage": ["Smoke tests are verification guardrails", "temporary smoke parser"],
+        "source-link, build, and documentation constraints": ["source-link", "build-policy"],
+    }[workstream]
+    if not any(term in policy for term in policy_terms):
+        raise SystemExit(f"docs/linuxcnc-source-policy.md no longer references workstream boundary: {workstream}")
     for path in paths:
         if path not in doc:
             raise SystemExit(f"missing source-map path in workstream index: {path}")
diff --git a/docs/linuxcnc-workstreams-source-map.md b/docs/linuxcnc-workstreams-source-map.md
index 7a0ea72..5088b5d 100644
--- a/docs/linuxcnc-workstreams-source-map.md
+++ b/docs/linuxcnc-workstreams-source-map.md
@@ -32,6 +32,8 @@ the temporary smoke parser.
 
 - Every active workstream must have at least one source-map document and guard
   script.
+- `docs/linuxcnc-source-policy.md` must keep the same one-context workflow
+  boundary and smoke-verification-only rule used by this index.
 - `test-native.sh` and `test-linuxcnc-source-link.sh` must run the workstream
   source-map guard before consuming generated config aliases or source-linked
   LinuxCNC objects.
diff --git a/test-all-native.sh b/test-all-native.sh
index a5a3412..d0adfa0 100755
--- a/test-all-native.sh
+++ b/test-all-native.sh
@@ -257,6 +257,8 @@ grep -F 'The visible backend selector must stay limited to the LinuxCNC RS274 ba
 grep -F 'LinuxCNC workstreams source map' docs/linuxcnc-workstreams-source-map.md >/dev/null
 grep -F '| `switchkins/remap` generator and tables | `docs/linuxcnc-switchkins-remap-source-map.md` |' docs/linuxcnc-workstreams-source-map.md >/dev/null
 grep -F 'Every active workstream must have at least one source-map document and guard' docs/linuxcnc-workstreams-source-map.md >/dev/null
+grep -F 'docs/linuxcnc-source-policy.md` must keep the same one-context workflow' docs/linuxcnc-workstreams-source-map.md >/dev/null
+grep -F 'Smoke tests are verification guardrails. They must not be expanded with new' docs/linuxcnc-source-policy.md >/dev/null
 grep -F 'LinuxCNC tooldata source map' docs/linuxcnc-tooldata-source-map.md >/dev/null
 grep -F '`src/emc/tooldata/Submakefile` selects `tooldata_mmap.cc`' docs/linuxcnc-tooldata-source-map.md >/dev/null
 grep -F 'Tool table files referenced by switchkins INI files are source coverage only' docs/linuxcnc-tooldata-source-map.md >/dev/null