diff --git a/check-linuxcnc-workstreams-source-map.sh b/check-linuxcnc-workstreams-source-map.sh
index d69faee..72c67ba 100755
--- a/check-linuxcnc-workstreams-source-map.sh
+++ b/check-linuxcnc-workstreams-source-map.sh
@@ -16,6 +16,8 @@ grep -F '3. WASM filesystem and OPFS persistence' docs/architecture.md >/dev/nul
 grep -F '4. browser app integration' docs/architecture.md >/dev/null
 grep -F '5. Node and browser smoke coverage' docs/architecture.md >/dev/null
 grep -F '6. source-link, build, and documentation constraints' docs/architecture.md >/dev/null
+grep -F 'The synchronized source-map guard for these contexts is' docs/architecture.md >/dev/null
+grep -F '`docs/linuxcnc-workstreams-source-map.md`.' docs/architecture.md >/dev/null
 
 grep -F 'REMAP = M428' "$linuxcnc_root/configs/sim/axis/vismach/5axis/bridgemill/5axis.ini" >/dev/null
 grep -F '#<kinstype>' "$linuxcnc_root/configs/sim/axis/vismach/5axis/bridgemill/remap_subs/428remap.ngc" >/dev/null
@@ -49,6 +51,10 @@ grep -F 'Keep the change inside one active workstream context unless a dependenc
     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 'Keep the six active workstream contexts synchronized with' \
+    docs/linuxcnc-source-policy.md >/dev/null
+grep -F '`docs/linuxcnc-workstreams-source-map.md` so source-map guards' \
+    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' \
diff --git a/docs/architecture.md b/docs/architecture.md
index 13f451a..3fa1c1a 100644
--- a/docs/architecture.md
+++ b/docs/architecture.md
@@ -42,6 +42,8 @@ advanced in this order:
 Each step should stay source-backed and close one small gap at a time. A single
 pass should advance one workstream context only; crossing into another context
 requires naming the dependency and keeping the edit set minimal.
+The synchronized source-map guard for these contexts is
+`docs/linuxcnc-workstreams-source-map.md`.
 
 ## Dialect expansion
 
diff --git a/docs/linuxcnc-source-policy.md b/docs/linuxcnc-source-policy.md
index 14d1a53..a9fe806 100644
--- a/docs/linuxcnc-source-policy.md
+++ b/docs/linuxcnc-source-policy.md
@@ -63,6 +63,9 @@ Efficiency rules:
 - Each pass should advance one reasonable, reviewable context. Do not use a
   nearby failing smoke assertion, broad fixture, or convenient touched file as
   permission to expand the pass into another workstream.
+- Keep the six active workstream contexts synchronized with
+  `docs/linuxcnc-workstreams-source-map.md` so source-map guards, architecture,
+  and this policy stay aligned.
 - Do not add a smoke-only behavior path when the LinuxCNC-backed route already
   exists; add coverage to the source-backed route instead.
 - The legacy explicit smoke backend must not be enabled together with the