diff --git a/coderules/languages/jetbrains.mps.lang.coderules/jetbrains.mps.lang.coderules.mpl b/coderules/languages/jetbrains.mps.lang.coderules/jetbrains.mps.lang.coderules.mpl
index cdc543b3..3f18245c 100644
--- a/coderules/languages/jetbrains.mps.lang.coderules/jetbrains.mps.lang.coderules.mpl
+++ b/coderules/languages/jetbrains.mps.lang.coderules/jetbrains.mps.lang.coderules.mpl
@@ -68,6 +68,7 @@
         <module reference="ff6372a2-2f45-4ec3-952b-02581666015f(jetbrains.mps.lang.coderules.template)" version="0" />
         <module reference="ceab5195-25ea-4f22-9b92-103b95ca8c0c(jetbrains.mps.lang.core)" version="0" />
         <module reference="f4ad079d-bc71-4ffb-9600-9328705cf998(jetbrains.mps.lang.descriptor)" version="0" />
+        <module reference="9e98f4e2-decf-4e97-bf80-9109e8b759aa(jetbrains.mps.lang.feedback.context)" version="0" />
         <module reference="446c26eb-2b7b-4bf0-9b35-f83fa582753e(jetbrains.mps.lang.modelapi)" version="0" />
         <module reference="7866978e-a0f0-4cc7-81bc-4d213d9375e1(jetbrains.mps.lang.smodel)" version="1" />
         <module reference="cba985fe-1e96-4f16-9f8d-b07434405d4f(jetbrains.mps.lang.smodel.types)" version="0" />
@@ -118,6 +119,12 @@
     <language slang="l:af65afd8-f0dd-4942-87d9-63a55f2a9db1:jetbrains.mps.lang.behavior" version="2" />
     <language slang="l:fe9d76d7-5809-45c9-ae28-a40915b4d6ff:jetbrains.mps.lang.checkedName" version="1" />
     <language slang="l:3f4bc5f5-c6c1-4a28-8b10-c83066ffa4a1:jetbrains.mps.lang.constraints" version="5" />
+    <language slang="l:e51810c5-7308-4642-bcb6-469e61b5dd18:jetbrains.mps.lang.constraints.msgSpecification" version="0" />
+    <language slang="l:47257bf3-78d3-470b-89d9-8c3261a61d15:jetbrains.mps.lang.constraints.rules" version="0" />
+    <language slang="l:5dae8159-ab99-46bb-a40d-0cee30ee7018:jetbrains.mps.lang.constraints.rules.kinds" version="0" />
+    <language slang="l:134c38d4-e3af-4d9e-b069-1c7df0a4005d:jetbrains.mps.lang.constraints.rules.skeleton" version="0" />
+    <language slang="l:3ad5badc-1d9c-461c-b7b1-fa2fcd0a0ae7:jetbrains.mps.lang.context" version="0" />
+    <language slang="l:ea3159bf-f48e-4720-bde2-86dba75f0d34:jetbrains.mps.lang.context.defs" version="0" />
     <language slang="l:ceab5195-25ea-4f22-9b92-103b95ca8c0c:jetbrains.mps.lang.core" version="2" />
     <language slang="l:7fa12e9c-b949-4976-b4fa-19accbc320b4:jetbrains.mps.lang.dataFlow" version="1" />
     <language slang="l:f4ad079d-bc71-4ffb-9600-9328705cf998:jetbrains.mps.lang.descriptor" version="0" />
@@ -126,6 +133,7 @@
     <language slang="l:b401a680-8325-4110-8fd3-84331ff25bef:jetbrains.mps.lang.generator" version="3" />
     <language slang="l:d7706f63-9be2-479c-a3da-ae92af1e64d5:jetbrains.mps.lang.generator.generationContext" version="2" />
     <language slang="l:d7a92d38-f7db-40d0-8431-763b0c3c9f20:jetbrains.mps.lang.intentions" version="1" />
+    <language slang="l:ad93155d-79b2-4759-b10c-55123e763903:jetbrains.mps.lang.messages" version="0" />
     <language slang="l:90746344-04fd-4286-97d5-b46ae6a81709:jetbrains.mps.lang.migration" version="2" />
     <language slang="l:446c26eb-2b7b-4bf0-9b35-f83fa582753e:jetbrains.mps.lang.modelapi" version="0" />
     <language slang="l:d4615e3b-d671-4ba9-af01-2b78369b0ba7:jetbrains.mps.lang.pattern" version="2" />
@@ -133,6 +141,7 @@
     <language slang="l:3a13115c-633c-4c5c-bbcc-75c4219e9555:jetbrains.mps.lang.quotation" version="3" />
     <language slang="l:3ecd7c84-cde3-45de-886c-135ecc69b742:jetbrains.mps.lang.refactoring" version="0" />
     <language slang="l:982eb8df-2c96-4bd7-9963-11712ea622e5:jetbrains.mps.lang.resources" version="2" />
+    <language slang="l:b3551702-269c-4f05-ba61-58060cef4292:jetbrains.mps.lang.rulesAndMessages" version="0" />
     <language slang="l:0eddeefa-c2d6-4437-bc2c-de50fd4ce470:jetbrains.mps.lang.script" version="1" />
     <language slang="l:13744753-c81f-424a-9c1b-cf8943bf4e86:jetbrains.mps.lang.sharedConcepts" version="0" />
     <language slang="l:7866978e-a0f0-4cc7-81bc-4d213d9375e1:jetbrains.mps.lang.smodel" version="17" />
@@ -168,6 +177,7 @@
     <module reference="ceab5195-25ea-4f22-9b92-103b95ca8c0c(jetbrains.mps.lang.core)" version="0" />
     <module reference="f4ad079d-bc71-4ffb-9600-9328705cf998(jetbrains.mps.lang.descriptor)" version="0" />
     <module reference="a9e4c532-c5f5-4bb7-99ef-42abb73bbb70(jetbrains.mps.lang.descriptor.aspects)" version="0" />
+    <module reference="9e98f4e2-decf-4e97-bf80-9109e8b759aa(jetbrains.mps.lang.feedback.context)" version="0" />
     <module reference="528ff3b9-5fc4-40dd-931f-c6ce3650640e(jetbrains.mps.lang.migration.runtime)" version="0" />
     <module reference="446c26eb-2b7b-4bf0-9b35-f83fa582753e(jetbrains.mps.lang.modelapi)" version="0" />
     <module reference="7866978e-a0f0-4cc7-81bc-4d213d9375e1(jetbrains.mps.lang.smodel)" version="1" />
diff --git a/coderules/languages/jetbrains.mps.lang.coderules/runtime/jetbrains.mps.lang.coderules.runtime.msd b/coderules/languages/jetbrains.mps.lang.coderules/runtime/jetbrains.mps.lang.coderules.runtime.msd
index 16253337..40ba509c 100644
--- a/coderules/languages/jetbrains.mps.lang.coderules/runtime/jetbrains.mps.lang.coderules.runtime.msd
+++ b/coderules/languages/jetbrains.mps.lang.coderules/runtime/jetbrains.mps.lang.coderules.runtime.msd
@@ -39,6 +39,7 @@
     <module reference="26e8f4ce-2a35-4f44-8065-e5ba154b18e9(jetbrains.mps.lang.coderules.runtime)" version="0" />
     <module reference="ff6372a2-2f45-4ec3-952b-02581666015f(jetbrains.mps.lang.coderules.template)" version="0" />
     <module reference="ceab5195-25ea-4f22-9b92-103b95ca8c0c(jetbrains.mps.lang.core)" version="0" />
+    <module reference="9e98f4e2-decf-4e97-bf80-9109e8b759aa(jetbrains.mps.lang.feedback.context)" version="0" />
     <module reference="bbf5c548-7111-4a53-a117-cdefc664cf34(jetbrains.mps.logic.reactor)" version="0" />
     <module reference="a5478664-6b44-4c62-a9f7-434f8aa57eee(jetbrains.mps.logic.runtime)" version="0" />
     <module reference="da80355b-a098-4248-9ec8-70d10dd7e9af(jetbrains.mps.reporting.runtime)" version="0" />
diff --git a/coderules/languages/jetbrains.mps.lang.controlflow/jetbrains.mps.lang.controlflow.mpl b/coderules/languages/jetbrains.mps.lang.controlflow/jetbrains.mps.lang.controlflow.mpl
index 14573c23..6c98ec54 100644
--- a/coderules/languages/jetbrains.mps.lang.controlflow/jetbrains.mps.lang.controlflow.mpl
+++ b/coderules/languages/jetbrains.mps.lang.controlflow/jetbrains.mps.lang.controlflow.mpl
@@ -65,6 +65,7 @@
         <module reference="ceab5195-25ea-4f22-9b92-103b95ca8c0c(jetbrains.mps.lang.core)" version="0" />
         <module reference="f4ad079d-bc71-4ffb-9600-9328705cf998(jetbrains.mps.lang.descriptor)" version="0" />
         <module reference="3ac18869-0828-4401-abad-822a47bf83f1(jetbrains.mps.lang.descriptor#9020561928507175817)" version="0" />
+        <module reference="9e98f4e2-decf-4e97-bf80-9109e8b759aa(jetbrains.mps.lang.feedback.context)" version="0" />
         <module reference="446c26eb-2b7b-4bf0-9b35-f83fa582753e(jetbrains.mps.lang.modelapi)" version="0" />
         <module reference="86ef8290-12bb-4ca7-947f-093788f263a9(jetbrains.mps.lang.project)" version="0" />
         <module reference="7866978e-a0f0-4cc7-81bc-4d213d9375e1(jetbrains.mps.lang.smodel)" version="1" />
@@ -109,14 +110,23 @@
     <language slang="l:af65afd8-f0dd-4942-87d9-63a55f2a9db1:jetbrains.mps.lang.behavior" version="2" />
     <language slang="l:fe9d76d7-5809-45c9-ae28-a40915b4d6ff:jetbrains.mps.lang.checkedName" version="1" />
     <language slang="l:3f4bc5f5-c6c1-4a28-8b10-c83066ffa4a1:jetbrains.mps.lang.constraints" version="5" />
+    <language slang="l:e51810c5-7308-4642-bcb6-469e61b5dd18:jetbrains.mps.lang.constraints.msgSpecification" version="0" />
+    <language slang="l:47257bf3-78d3-470b-89d9-8c3261a61d15:jetbrains.mps.lang.constraints.rules" version="0" />
+    <language slang="l:5dae8159-ab99-46bb-a40d-0cee30ee7018:jetbrains.mps.lang.constraints.rules.kinds" version="0" />
+    <language slang="l:134c38d4-e3af-4d9e-b069-1c7df0a4005d:jetbrains.mps.lang.constraints.rules.skeleton" version="0" />
+    <language slang="l:3ad5badc-1d9c-461c-b7b1-fa2fcd0a0ae7:jetbrains.mps.lang.context" version="0" />
+    <language slang="l:ea3159bf-f48e-4720-bde2-86dba75f0d34:jetbrains.mps.lang.context.defs" version="0" />
     <language slang="l:ceab5195-25ea-4f22-9b92-103b95ca8c0c:jetbrains.mps.lang.core" version="2" />
     <language slang="l:f4ad079d-bc71-4ffb-9600-9328705cf998:jetbrains.mps.lang.descriptor" version="0" />
     <language slang="l:18bc6592-03a6-4e29-a83a-7ff23bde13ba:jetbrains.mps.lang.editor" version="13" />
+    <language slang="l:ad93155d-79b2-4759-b10c-55123e763903:jetbrains.mps.lang.messages" version="0" />
     <language slang="l:446c26eb-2b7b-4bf0-9b35-f83fa582753e:jetbrains.mps.lang.modelapi" version="0" />
     <language slang="l:d4615e3b-d671-4ba9-af01-2b78369b0ba7:jetbrains.mps.lang.pattern" version="2" />
     <language slang="l:28f9e497-3b42-4291-aeba-0a1039153ab1:jetbrains.mps.lang.plugin" version="4" />
     <language slang="l:3a13115c-633c-4c5c-bbcc-75c4219e9555:jetbrains.mps.lang.quotation" version="3" />
     <language slang="l:982eb8df-2c96-4bd7-9963-11712ea622e5:jetbrains.mps.lang.resources" version="2" />
+    <language slang="l:b3551702-269c-4f05-ba61-58060cef4292:jetbrains.mps.lang.rulesAndMessages" version="0" />
+    <language slang="l:13744753-c81f-424a-9c1b-cf8943bf4e86:jetbrains.mps.lang.sharedConcepts" version="0" />
     <language slang="l:7866978e-a0f0-4cc7-81bc-4d213d9375e1:jetbrains.mps.lang.smodel" version="17" />
     <language slang="l:c72da2b9-7cce-4447-8389-f407dc1158b7:jetbrains.mps.lang.structure" version="9" />
     <language slang="l:c7fb639f-be78-4307-89b0-b5959c3fa8c8:jetbrains.mps.lang.text" version="0" />
@@ -142,6 +152,7 @@
     <module reference="ceab5195-25ea-4f22-9b92-103b95ca8c0c(jetbrains.mps.lang.core)" version="0" />
     <module reference="f4ad079d-bc71-4ffb-9600-9328705cf998(jetbrains.mps.lang.descriptor)" version="0" />
     <module reference="a9e4c532-c5f5-4bb7-99ef-42abb73bbb70(jetbrains.mps.lang.descriptor.aspects)" version="0" />
+    <module reference="9e98f4e2-decf-4e97-bf80-9109e8b759aa(jetbrains.mps.lang.feedback.context)" version="0" />
     <module reference="446c26eb-2b7b-4bf0-9b35-f83fa582753e(jetbrains.mps.lang.modelapi)" version="0" />
     <module reference="7866978e-a0f0-4cc7-81bc-4d213d9375e1(jetbrains.mps.lang.smodel)" version="1" />
     <module reference="c72da2b9-7cce-4447-8389-f407dc1158b7(jetbrains.mps.lang.structure)" version="0" />
diff --git a/coderules/languages/jetbrains.mps.lang.smodel.types/jetbrains.mps.lang.smodel.types.mpl b/coderules/languages/jetbrains.mps.lang.smodel.types/jetbrains.mps.lang.smodel.types.mpl
index 3414c444..806d925b 100644
--- a/coderules/languages/jetbrains.mps.lang.smodel.types/jetbrains.mps.lang.smodel.types.mpl
+++ b/coderules/languages/jetbrains.mps.lang.smodel.types/jetbrains.mps.lang.smodel.types.mpl
@@ -46,6 +46,7 @@
         <module reference="2d3c70e9-aab2-4870-8d8d-6036800e4103(jetbrains.mps.kernel)" version="0" />
         <module reference="d936855b-48da-4812-a8a0-2bfddd633ac5(jetbrains.mps.lang.behavior.api)" version="0" />
         <module reference="ceab5195-25ea-4f22-9b92-103b95ca8c0c(jetbrains.mps.lang.core)" version="0" />
+        <module reference="9e98f4e2-decf-4e97-bf80-9109e8b759aa(jetbrains.mps.lang.feedback.context)" version="0" />
         <module reference="446c26eb-2b7b-4bf0-9b35-f83fa582753e(jetbrains.mps.lang.modelapi)" version="0" />
         <module reference="7866978e-a0f0-4cc7-81bc-4d213d9375e1(jetbrains.mps.lang.smodel)" version="1" />
         <module reference="cba985fe-1e96-4f16-9f8d-b07434405d4f(jetbrains.mps.lang.smodel.types)" version="0" />
@@ -86,6 +87,12 @@
     <language slang="l:af65afd8-f0dd-4942-87d9-63a55f2a9db1:jetbrains.mps.lang.behavior" version="2" />
     <language slang="l:fe9d76d7-5809-45c9-ae28-a40915b4d6ff:jetbrains.mps.lang.checkedName" version="1" />
     <language slang="l:3f4bc5f5-c6c1-4a28-8b10-c83066ffa4a1:jetbrains.mps.lang.constraints" version="5" />
+    <language slang="l:e51810c5-7308-4642-bcb6-469e61b5dd18:jetbrains.mps.lang.constraints.msgSpecification" version="0" />
+    <language slang="l:47257bf3-78d3-470b-89d9-8c3261a61d15:jetbrains.mps.lang.constraints.rules" version="0" />
+    <language slang="l:5dae8159-ab99-46bb-a40d-0cee30ee7018:jetbrains.mps.lang.constraints.rules.kinds" version="0" />
+    <language slang="l:134c38d4-e3af-4d9e-b069-1c7df0a4005d:jetbrains.mps.lang.constraints.rules.skeleton" version="0" />
+    <language slang="l:3ad5badc-1d9c-461c-b7b1-fa2fcd0a0ae7:jetbrains.mps.lang.context" version="0" />
+    <language slang="l:ea3159bf-f48e-4720-bde2-86dba75f0d34:jetbrains.mps.lang.context.defs" version="0" />
     <language slang="l:ceab5195-25ea-4f22-9b92-103b95ca8c0c:jetbrains.mps.lang.core" version="2" />
     <language slang="l:7fa12e9c-b949-4976-b4fa-19accbc320b4:jetbrains.mps.lang.dataFlow" version="1" />
     <language slang="l:f4ad079d-bc71-4ffb-9600-9328705cf998:jetbrains.mps.lang.descriptor" version="0" />
@@ -94,11 +101,13 @@
     <language slang="l:b401a680-8325-4110-8fd3-84331ff25bef:jetbrains.mps.lang.generator" version="3" />
     <language slang="l:d7706f63-9be2-479c-a3da-ae92af1e64d5:jetbrains.mps.lang.generator.generationContext" version="2" />
     <language slang="l:d7a92d38-f7db-40d0-8431-763b0c3c9f20:jetbrains.mps.lang.intentions" version="1" />
+    <language slang="l:ad93155d-79b2-4759-b10c-55123e763903:jetbrains.mps.lang.messages" version="0" />
     <language slang="l:446c26eb-2b7b-4bf0-9b35-f83fa582753e:jetbrains.mps.lang.modelapi" version="0" />
     <language slang="l:d4615e3b-d671-4ba9-af01-2b78369b0ba7:jetbrains.mps.lang.pattern" version="2" />
     <language slang="l:3a13115c-633c-4c5c-bbcc-75c4219e9555:jetbrains.mps.lang.quotation" version="3" />
     <language slang="l:3ecd7c84-cde3-45de-886c-135ecc69b742:jetbrains.mps.lang.refactoring" version="0" />
     <language slang="l:982eb8df-2c96-4bd7-9963-11712ea622e5:jetbrains.mps.lang.resources" version="2" />
+    <language slang="l:b3551702-269c-4f05-ba61-58060cef4292:jetbrains.mps.lang.rulesAndMessages" version="0" />
     <language slang="l:0eddeefa-c2d6-4437-bc2c-de50fd4ce470:jetbrains.mps.lang.script" version="1" />
     <language slang="l:13744753-c81f-424a-9c1b-cf8943bf4e86:jetbrains.mps.lang.sharedConcepts" version="0" />
     <language slang="l:7866978e-a0f0-4cc7-81bc-4d213d9375e1:jetbrains.mps.lang.smodel" version="17" />
@@ -121,6 +130,7 @@
     <module reference="d936855b-48da-4812-a8a0-2bfddd633ac5(jetbrains.mps.lang.behavior.api)" version="0" />
     <module reference="ceab5195-25ea-4f22-9b92-103b95ca8c0c(jetbrains.mps.lang.core)" version="0" />
     <module reference="a9e4c532-c5f5-4bb7-99ef-42abb73bbb70(jetbrains.mps.lang.descriptor.aspects)" version="0" />
+    <module reference="9e98f4e2-decf-4e97-bf80-9109e8b759aa(jetbrains.mps.lang.feedback.context)" version="0" />
     <module reference="446c26eb-2b7b-4bf0-9b35-f83fa582753e(jetbrains.mps.lang.modelapi)" version="0" />
     <module reference="7866978e-a0f0-4cc7-81bc-4d213d9375e1(jetbrains.mps.lang.smodel)" version="1" />
     <module reference="cba985fe-1e96-4f16-9f8d-b07434405d4f(jetbrains.mps.lang.smodel.types)" version="0" />
diff --git a/coderules/languages/jetbrains.mps.lang.typechecking/jetbrains.mps.lang.typechecking.mpl b/coderules/languages/jetbrains.mps.lang.typechecking/jetbrains.mps.lang.typechecking.mpl
index 179b450b..15ba670f 100644
--- a/coderules/languages/jetbrains.mps.lang.typechecking/jetbrains.mps.lang.typechecking.mpl
+++ b/coderules/languages/jetbrains.mps.lang.typechecking/jetbrains.mps.lang.typechecking.mpl
@@ -72,6 +72,7 @@
         <module reference="ceab5195-25ea-4f22-9b92-103b95ca8c0c(jetbrains.mps.lang.core)" version="0" />
         <module reference="f4ad079d-bc71-4ffb-9600-9328705cf998(jetbrains.mps.lang.descriptor)" version="0" />
         <module reference="3ac18869-0828-4401-abad-822a47bf83f1(jetbrains.mps.lang.descriptor#9020561928507175817)" version="0" />
+        <module reference="9e98f4e2-decf-4e97-bf80-9109e8b759aa(jetbrains.mps.lang.feedback.context)" version="0" />
         <module reference="446c26eb-2b7b-4bf0-9b35-f83fa582753e(jetbrains.mps.lang.modelapi)" version="0" />
         <module reference="86ef8290-12bb-4ca7-947f-093788f263a9(jetbrains.mps.lang.project)" version="0" />
         <module reference="7866978e-a0f0-4cc7-81bc-4d213d9375e1(jetbrains.mps.lang.smodel)" version="1" />
@@ -120,14 +121,23 @@
     <language slang="l:af65afd8-f0dd-4942-87d9-63a55f2a9db1:jetbrains.mps.lang.behavior" version="2" />
     <language slang="l:fe9d76d7-5809-45c9-ae28-a40915b4d6ff:jetbrains.mps.lang.checkedName" version="1" />
     <language slang="l:3f4bc5f5-c6c1-4a28-8b10-c83066ffa4a1:jetbrains.mps.lang.constraints" version="5" />
+    <language slang="l:e51810c5-7308-4642-bcb6-469e61b5dd18:jetbrains.mps.lang.constraints.msgSpecification" version="0" />
+    <language slang="l:47257bf3-78d3-470b-89d9-8c3261a61d15:jetbrains.mps.lang.constraints.rules" version="0" />
+    <language slang="l:5dae8159-ab99-46bb-a40d-0cee30ee7018:jetbrains.mps.lang.constraints.rules.kinds" version="0" />
+    <language slang="l:134c38d4-e3af-4d9e-b069-1c7df0a4005d:jetbrains.mps.lang.constraints.rules.skeleton" version="0" />
+    <language slang="l:3ad5badc-1d9c-461c-b7b1-fa2fcd0a0ae7:jetbrains.mps.lang.context" version="0" />
+    <language slang="l:ea3159bf-f48e-4720-bde2-86dba75f0d34:jetbrains.mps.lang.context.defs" version="0" />
     <language slang="l:ceab5195-25ea-4f22-9b92-103b95ca8c0c:jetbrains.mps.lang.core" version="2" />
     <language slang="l:f4ad079d-bc71-4ffb-9600-9328705cf998:jetbrains.mps.lang.descriptor" version="0" />
     <language slang="l:18bc6592-03a6-4e29-a83a-7ff23bde13ba:jetbrains.mps.lang.editor" version="13" />
+    <language slang="l:ad93155d-79b2-4759-b10c-55123e763903:jetbrains.mps.lang.messages" version="0" />
     <language slang="l:446c26eb-2b7b-4bf0-9b35-f83fa582753e:jetbrains.mps.lang.modelapi" version="0" />
     <language slang="l:d4615e3b-d671-4ba9-af01-2b78369b0ba7:jetbrains.mps.lang.pattern" version="2" />
     <language slang="l:28f9e497-3b42-4291-aeba-0a1039153ab1:jetbrains.mps.lang.plugin" version="4" />
     <language slang="l:3a13115c-633c-4c5c-bbcc-75c4219e9555:jetbrains.mps.lang.quotation" version="3" />
     <language slang="l:982eb8df-2c96-4bd7-9963-11712ea622e5:jetbrains.mps.lang.resources" version="2" />
+    <language slang="l:b3551702-269c-4f05-ba61-58060cef4292:jetbrains.mps.lang.rulesAndMessages" version="0" />
+    <language slang="l:13744753-c81f-424a-9c1b-cf8943bf4e86:jetbrains.mps.lang.sharedConcepts" version="0" />
     <language slang="l:7866978e-a0f0-4cc7-81bc-4d213d9375e1:jetbrains.mps.lang.smodel" version="17" />
     <language slang="l:c72da2b9-7cce-4447-8389-f407dc1158b7:jetbrains.mps.lang.structure" version="9" />
     <language slang="l:c7fb639f-be78-4307-89b0-b5959c3fa8c8:jetbrains.mps.lang.text" version="0" />
@@ -152,6 +162,7 @@
     <module reference="ceab5195-25ea-4f22-9b92-103b95ca8c0c(jetbrains.mps.lang.core)" version="0" />
     <module reference="f4ad079d-bc71-4ffb-9600-9328705cf998(jetbrains.mps.lang.descriptor)" version="0" />
     <module reference="a9e4c532-c5f5-4bb7-99ef-42abb73bbb70(jetbrains.mps.lang.descriptor.aspects)" version="0" />
+    <module reference="9e98f4e2-decf-4e97-bf80-9109e8b759aa(jetbrains.mps.lang.feedback.context)" version="0" />
     <module reference="446c26eb-2b7b-4bf0-9b35-f83fa582753e(jetbrains.mps.lang.modelapi)" version="0" />
     <module reference="7866978e-a0f0-4cc7-81bc-4d213d9375e1(jetbrains.mps.lang.smodel)" version="1" />
     <module reference="c72da2b9-7cce-4447-8389-f407dc1158b7(jetbrains.mps.lang.structure)" version="0" />
diff --git a/coderules/languages/jetbrains.mps.logic/jetbrains.mps.logic.mpl b/coderules/languages/jetbrains.mps.logic/jetbrains.mps.logic.mpl
index 1a200acc..574c158c 100644
--- a/coderules/languages/jetbrains.mps.logic/jetbrains.mps.logic.mpl
+++ b/coderules/languages/jetbrains.mps.logic/jetbrains.mps.logic.mpl
@@ -52,6 +52,7 @@
         <module reference="2d3c70e9-aab2-4870-8d8d-6036800e4103(jetbrains.mps.kernel)" version="0" />
         <module reference="ff6372a2-2f45-4ec3-952b-02581666015f(jetbrains.mps.lang.coderules.template)" version="0" />
         <module reference="ceab5195-25ea-4f22-9b92-103b95ca8c0c(jetbrains.mps.lang.core)" version="0" />
+        <module reference="9e98f4e2-decf-4e97-bf80-9109e8b759aa(jetbrains.mps.lang.feedback.context)" version="0" />
         <module reference="9ded098b-ad6a-4657-bfd9-48636cfe8bc3(jetbrains.mps.lang.traceable)" version="0" />
         <module reference="35320f26-77cb-4c55-be9f-a97a27770af1(jetbrains.mps.logic)" version="0" />
         <module reference="85f64970-3326-4ea7-966e-1ac904686424(jetbrains.mps.logic#6626732309150416985)" version="0" />
@@ -103,6 +104,12 @@
     <language slang="l:af65afd8-f0dd-4942-87d9-63a55f2a9db1:jetbrains.mps.lang.behavior" version="2" />
     <language slang="l:fe9d76d7-5809-45c9-ae28-a40915b4d6ff:jetbrains.mps.lang.checkedName" version="1" />
     <language slang="l:3f4bc5f5-c6c1-4a28-8b10-c83066ffa4a1:jetbrains.mps.lang.constraints" version="5" />
+    <language slang="l:e51810c5-7308-4642-bcb6-469e61b5dd18:jetbrains.mps.lang.constraints.msgSpecification" version="0" />
+    <language slang="l:47257bf3-78d3-470b-89d9-8c3261a61d15:jetbrains.mps.lang.constraints.rules" version="0" />
+    <language slang="l:5dae8159-ab99-46bb-a40d-0cee30ee7018:jetbrains.mps.lang.constraints.rules.kinds" version="0" />
+    <language slang="l:134c38d4-e3af-4d9e-b069-1c7df0a4005d:jetbrains.mps.lang.constraints.rules.skeleton" version="0" />
+    <language slang="l:3ad5badc-1d9c-461c-b7b1-fa2fcd0a0ae7:jetbrains.mps.lang.context" version="0" />
+    <language slang="l:ea3159bf-f48e-4720-bde2-86dba75f0d34:jetbrains.mps.lang.context.defs" version="0" />
     <language slang="l:ceab5195-25ea-4f22-9b92-103b95ca8c0c:jetbrains.mps.lang.core" version="2" />
     <language slang="l:7fa12e9c-b949-4976-b4fa-19accbc320b4:jetbrains.mps.lang.dataFlow" version="1" />
     <language slang="l:f4ad079d-bc71-4ffb-9600-9328705cf998:jetbrains.mps.lang.descriptor" version="0" />
@@ -111,6 +118,7 @@
     <language slang="l:b401a680-8325-4110-8fd3-84331ff25bef:jetbrains.mps.lang.generator" version="3" />
     <language slang="l:d7706f63-9be2-479c-a3da-ae92af1e64d5:jetbrains.mps.lang.generator.generationContext" version="2" />
     <language slang="l:d7a92d38-f7db-40d0-8431-763b0c3c9f20:jetbrains.mps.lang.intentions" version="1" />
+    <language slang="l:ad93155d-79b2-4759-b10c-55123e763903:jetbrains.mps.lang.messages" version="0" />
     <language slang="l:90746344-04fd-4286-97d5-b46ae6a81709:jetbrains.mps.lang.migration" version="2" />
     <language slang="l:446c26eb-2b7b-4bf0-9b35-f83fa582753e:jetbrains.mps.lang.modelapi" version="0" />
     <language slang="l:d4615e3b-d671-4ba9-af01-2b78369b0ba7:jetbrains.mps.lang.pattern" version="2" />
@@ -118,6 +126,7 @@
     <language slang="l:3a13115c-633c-4c5c-bbcc-75c4219e9555:jetbrains.mps.lang.quotation" version="3" />
     <language slang="l:3ecd7c84-cde3-45de-886c-135ecc69b742:jetbrains.mps.lang.refactoring" version="0" />
     <language slang="l:982eb8df-2c96-4bd7-9963-11712ea622e5:jetbrains.mps.lang.resources" version="2" />
+    <language slang="l:b3551702-269c-4f05-ba61-58060cef4292:jetbrains.mps.lang.rulesAndMessages" version="0" />
     <language slang="l:0eddeefa-c2d6-4437-bc2c-de50fd4ce470:jetbrains.mps.lang.script" version="1" />
     <language slang="l:13744753-c81f-424a-9c1b-cf8943bf4e86:jetbrains.mps.lang.sharedConcepts" version="0" />
     <language slang="l:7866978e-a0f0-4cc7-81bc-4d213d9375e1:jetbrains.mps.lang.smodel" version="17" />
@@ -141,6 +150,7 @@
     <module reference="2d3c70e9-aab2-4870-8d8d-6036800e4103(jetbrains.mps.kernel)" version="0" />
     <module reference="ceab5195-25ea-4f22-9b92-103b95ca8c0c(jetbrains.mps.lang.core)" version="0" />
     <module reference="a9e4c532-c5f5-4bb7-99ef-42abb73bbb70(jetbrains.mps.lang.descriptor.aspects)" version="0" />
+    <module reference="9e98f4e2-decf-4e97-bf80-9109e8b759aa(jetbrains.mps.lang.feedback.context)" version="0" />
     <module reference="9ded098b-ad6a-4657-bfd9-48636cfe8bc3(jetbrains.mps.lang.traceable)" version="0" />
     <module reference="35320f26-77cb-4c55-be9f-a97a27770af1(jetbrains.mps.logic)" version="0" />
     <module reference="bbf5c548-7111-4a53-a117-cdefc664cf34(jetbrains.mps.logic.reactor)" version="0" />
diff --git a/coderules/languages/jetbrains.mps.logic/languageModels/jetbrains.mps.logic.enumMigration.mps b/coderules/languages/jetbrains.mps.logic/languageModels/jetbrains.mps.logic.enumMigration.mps
index 1ea06194..f5ac5b4c 100644
--- a/coderules/languages/jetbrains.mps.logic/languageModels/jetbrains.mps.logic.enumMigration.mps
+++ b/coderules/languages/jetbrains.mps.logic/languageModels/jetbrains.mps.logic.enumMigration.mps
@@ -82,7 +82,7 @@
       <concept id="1240170042401" name="jetbrains.mps.lang.smodel.structure.SEnumerationMemberType" flags="in" index="2ZThk1">
         <reference id="1240170836027" name="enum" index="2ZWj4r" />
       </concept>
-      <concept id="2453008993612717253" name="jetbrains.mps.lang.smodel.structure.ExpressionEnumBody" flags="ng" index="3X5gDF">
+      <concept id="2453008993612717253" name="jetbrains.mps.lang.smodel.structure.EnumSwitchCaseBody_Expression" flags="ng" index="3X5gDF">
         <child id="2453008993612717254" name="expression" index="3X5gDC" />
       </concept>
       <concept id="2453008993612559843" name="jetbrains.mps.lang.smodel.structure.EnumSwitchCase" flags="ng" index="3X5Udd">
diff --git a/coderules/languages/jetbrains.mps.logic/runtime/jetbrains.mps.logic.runtime.msd b/coderules/languages/jetbrains.mps.logic/runtime/jetbrains.mps.logic.runtime.msd
index d0b71750..801a3bcf 100644
--- a/coderules/languages/jetbrains.mps.logic/runtime/jetbrains.mps.logic.runtime.msd
+++ b/coderules/languages/jetbrains.mps.logic/runtime/jetbrains.mps.logic.runtime.msd
@@ -34,6 +34,7 @@
     <module reference="6ed54515-acc8-4d1e-a16c-9fd6cfe951ea(MPS.Core)" version="0" />
     <module reference="8865b7a8-5271-43d3-884c-6fd1d9cfdd34(MPS.OpenAPI)" version="0" />
     <module reference="ceab5195-25ea-4f22-9b92-103b95ca8c0c(jetbrains.mps.lang.core)" version="0" />
+    <module reference="9e98f4e2-decf-4e97-bf80-9109e8b759aa(jetbrains.mps.lang.feedback.context)" version="0" />
     <module reference="bbf5c548-7111-4a53-a117-cdefc664cf34(jetbrains.mps.logic.reactor)" version="0" />
     <module reference="a5478664-6b44-4c62-a9f7-434f8aa57eee(jetbrains.mps.logic.runtime)" version="0" />
   </dependencyVersions>
diff --git a/coderules/languages/jetbrains.mps.typechecking.annotation/jetbrains.mps.typechecking.annotation.mpl b/coderules/languages/jetbrains.mps.typechecking.annotation/jetbrains.mps.typechecking.annotation.mpl
index 8f811eac..d117a9b0 100644
--- a/coderules/languages/jetbrains.mps.typechecking.annotation/jetbrains.mps.typechecking.annotation.mpl
+++ b/coderules/languages/jetbrains.mps.typechecking.annotation/jetbrains.mps.typechecking.annotation.mpl
@@ -25,14 +25,23 @@
     <language slang="l:af65afd8-f0dd-4942-87d9-63a55f2a9db1:jetbrains.mps.lang.behavior" version="2" />
     <language slang="l:fe9d76d7-5809-45c9-ae28-a40915b4d6ff:jetbrains.mps.lang.checkedName" version="1" />
     <language slang="l:3f4bc5f5-c6c1-4a28-8b10-c83066ffa4a1:jetbrains.mps.lang.constraints" version="5" />
+    <language slang="l:e51810c5-7308-4642-bcb6-469e61b5dd18:jetbrains.mps.lang.constraints.msgSpecification" version="0" />
+    <language slang="l:47257bf3-78d3-470b-89d9-8c3261a61d15:jetbrains.mps.lang.constraints.rules" version="0" />
+    <language slang="l:5dae8159-ab99-46bb-a40d-0cee30ee7018:jetbrains.mps.lang.constraints.rules.kinds" version="0" />
+    <language slang="l:134c38d4-e3af-4d9e-b069-1c7df0a4005d:jetbrains.mps.lang.constraints.rules.skeleton" version="0" />
+    <language slang="l:3ad5badc-1d9c-461c-b7b1-fa2fcd0a0ae7:jetbrains.mps.lang.context" version="0" />
+    <language slang="l:ea3159bf-f48e-4720-bde2-86dba75f0d34:jetbrains.mps.lang.context.defs" version="0" />
     <language slang="l:ceab5195-25ea-4f22-9b92-103b95ca8c0c:jetbrains.mps.lang.core" version="2" />
     <language slang="l:f4ad079d-bc71-4ffb-9600-9328705cf998:jetbrains.mps.lang.descriptor" version="0" />
     <language slang="l:18bc6592-03a6-4e29-a83a-7ff23bde13ba:jetbrains.mps.lang.editor" version="13" />
     <language slang="l:d7a92d38-f7db-40d0-8431-763b0c3c9f20:jetbrains.mps.lang.intentions" version="1" />
+    <language slang="l:ad93155d-79b2-4759-b10c-55123e763903:jetbrains.mps.lang.messages" version="0" />
     <language slang="l:446c26eb-2b7b-4bf0-9b35-f83fa582753e:jetbrains.mps.lang.modelapi" version="0" />
     <language slang="l:d4615e3b-d671-4ba9-af01-2b78369b0ba7:jetbrains.mps.lang.pattern" version="2" />
     <language slang="l:3a13115c-633c-4c5c-bbcc-75c4219e9555:jetbrains.mps.lang.quotation" version="3" />
     <language slang="l:982eb8df-2c96-4bd7-9963-11712ea622e5:jetbrains.mps.lang.resources" version="2" />
+    <language slang="l:b3551702-269c-4f05-ba61-58060cef4292:jetbrains.mps.lang.rulesAndMessages" version="0" />
+    <language slang="l:13744753-c81f-424a-9c1b-cf8943bf4e86:jetbrains.mps.lang.sharedConcepts" version="0" />
     <language slang="l:7866978e-a0f0-4cc7-81bc-4d213d9375e1:jetbrains.mps.lang.smodel" version="17" />
     <language slang="l:c72da2b9-7cce-4447-8389-f407dc1158b7:jetbrains.mps.lang.structure" version="9" />
     <language slang="l:c7fb639f-be78-4307-89b0-b5959c3fa8c8:jetbrains.mps.lang.text" version="0" />
@@ -54,6 +63,7 @@
     <module reference="ceab5195-25ea-4f22-9b92-103b95ca8c0c(jetbrains.mps.lang.core)" version="0" />
     <module reference="a9e4c532-c5f5-4bb7-99ef-42abb73bbb70(jetbrains.mps.lang.descriptor.aspects)" version="0" />
     <module reference="18bc6592-03a6-4e29-a83a-7ff23bde13ba(jetbrains.mps.lang.editor)" version="0" />
+    <module reference="9e98f4e2-decf-4e97-bf80-9109e8b759aa(jetbrains.mps.lang.feedback.context)" version="0" />
     <module reference="446c26eb-2b7b-4bf0-9b35-f83fa582753e(jetbrains.mps.lang.modelapi)" version="0" />
     <module reference="7866978e-a0f0-4cc7-81bc-4d213d9375e1(jetbrains.mps.lang.smodel)" version="1" />
     <module reference="c72da2b9-7cce-4447-8389-f407dc1158b7(jetbrains.mps.lang.structure)" version="0" />
diff --git a/coderules/languages/jetbrains.mps.typechecking.testlang/jetbrains.mps.typechecking.testlang.mpl b/coderules/languages/jetbrains.mps.typechecking.testlang/jetbrains.mps.typechecking.testlang.mpl
index 6414322e..6deab540 100644
--- a/coderules/languages/jetbrains.mps.typechecking.testlang/jetbrains.mps.typechecking.testlang.mpl
+++ b/coderules/languages/jetbrains.mps.typechecking.testlang/jetbrains.mps.typechecking.testlang.mpl
@@ -38,6 +38,7 @@
         <module reference="6ed54515-acc8-4d1e-a16c-9fd6cfe951ea(MPS.Core)" version="0" />
         <module reference="8865b7a8-5271-43d3-884c-6fd1d9cfdd34(MPS.OpenAPI)" version="0" />
         <module reference="ceab5195-25ea-4f22-9b92-103b95ca8c0c(jetbrains.mps.lang.core)" version="0" />
+        <module reference="9e98f4e2-decf-4e97-bf80-9109e8b759aa(jetbrains.mps.lang.feedback.context)" version="0" />
         <module reference="3a1f0f04-b5e0-43be-884e-b856bfdeca21(jetbrains.mps.typechecking.testlang)" version="0" />
         <module reference="1f130d77-1d29-44cb-bef3-bde05978c2c7(jetbrains.mps.typechecking.testlang#3575255234175341581)" version="0" />
       </dependencyVersions>
@@ -67,6 +68,12 @@
     <language slang="l:fe9d76d7-5809-45c9-ae28-a40915b4d6ff:jetbrains.mps.lang.checkedName" version="1" />
     <language slang="l:c4803b19-6d89-4a3b-bf82-390769514add:jetbrains.mps.lang.coderules" version="15" />
     <language slang="l:3f4bc5f5-c6c1-4a28-8b10-c83066ffa4a1:jetbrains.mps.lang.constraints" version="5" />
+    <language slang="l:e51810c5-7308-4642-bcb6-469e61b5dd18:jetbrains.mps.lang.constraints.msgSpecification" version="0" />
+    <language slang="l:47257bf3-78d3-470b-89d9-8c3261a61d15:jetbrains.mps.lang.constraints.rules" version="0" />
+    <language slang="l:5dae8159-ab99-46bb-a40d-0cee30ee7018:jetbrains.mps.lang.constraints.rules.kinds" version="0" />
+    <language slang="l:134c38d4-e3af-4d9e-b069-1c7df0a4005d:jetbrains.mps.lang.constraints.rules.skeleton" version="0" />
+    <language slang="l:3ad5badc-1d9c-461c-b7b1-fa2fcd0a0ae7:jetbrains.mps.lang.context" version="0" />
+    <language slang="l:ea3159bf-f48e-4720-bde2-86dba75f0d34:jetbrains.mps.lang.context.defs" version="0" />
     <language slang="l:ceab5195-25ea-4f22-9b92-103b95ca8c0c:jetbrains.mps.lang.core" version="2" />
     <language slang="l:7fa12e9c-b949-4976-b4fa-19accbc320b4:jetbrains.mps.lang.dataFlow" version="1" />
     <language slang="l:f4ad079d-bc71-4ffb-9600-9328705cf998:jetbrains.mps.lang.descriptor" version="0" />
@@ -75,11 +82,13 @@
     <language slang="l:b401a680-8325-4110-8fd3-84331ff25bef:jetbrains.mps.lang.generator" version="3" />
     <language slang="l:d7706f63-9be2-479c-a3da-ae92af1e64d5:jetbrains.mps.lang.generator.generationContext" version="2" />
     <language slang="l:d7a92d38-f7db-40d0-8431-763b0c3c9f20:jetbrains.mps.lang.intentions" version="1" />
+    <language slang="l:ad93155d-79b2-4759-b10c-55123e763903:jetbrains.mps.lang.messages" version="0" />
     <language slang="l:446c26eb-2b7b-4bf0-9b35-f83fa582753e:jetbrains.mps.lang.modelapi" version="0" />
     <language slang="l:d4615e3b-d671-4ba9-af01-2b78369b0ba7:jetbrains.mps.lang.pattern" version="2" />
     <language slang="l:3a13115c-633c-4c5c-bbcc-75c4219e9555:jetbrains.mps.lang.quotation" version="3" />
     <language slang="l:3ecd7c84-cde3-45de-886c-135ecc69b742:jetbrains.mps.lang.refactoring" version="0" />
     <language slang="l:982eb8df-2c96-4bd7-9963-11712ea622e5:jetbrains.mps.lang.resources" version="2" />
+    <language slang="l:b3551702-269c-4f05-ba61-58060cef4292:jetbrains.mps.lang.rulesAndMessages" version="0" />
     <language slang="l:0eddeefa-c2d6-4437-bc2c-de50fd4ce470:jetbrains.mps.lang.script" version="1" />
     <language slang="l:13744753-c81f-424a-9c1b-cf8943bf4e86:jetbrains.mps.lang.sharedConcepts" version="0" />
     <language slang="l:7866978e-a0f0-4cc7-81bc-4d213d9375e1:jetbrains.mps.lang.smodel" version="17" />
@@ -106,6 +115,7 @@
     <module reference="ff6372a2-2f45-4ec3-952b-02581666015f(jetbrains.mps.lang.coderules.template)" version="0" />
     <module reference="ceab5195-25ea-4f22-9b92-103b95ca8c0c(jetbrains.mps.lang.core)" version="0" />
     <module reference="a9e4c532-c5f5-4bb7-99ef-42abb73bbb70(jetbrains.mps.lang.descriptor.aspects)" version="0" />
+    <module reference="9e98f4e2-decf-4e97-bf80-9109e8b759aa(jetbrains.mps.lang.feedback.context)" version="0" />
     <module reference="f486b8aa-5b2d-4ec0-8ef5-8f45d773fb84(jetbrains.mps.lang.typechecking.runtime)" version="0" />
     <module reference="bbf5c548-7111-4a53-a117-cdefc664cf34(jetbrains.mps.logic.reactor)" version="0" />
     <module reference="a5478664-6b44-4c62-a9f7-434f8aa57eee(jetbrains.mps.logic.runtime)" version="0" />
diff --git a/coderules/solutions/jetbrains.mps.coderules.test/jetbrains.mps.coderules.test.msd b/coderules/solutions/jetbrains.mps.coderules.test/jetbrains.mps.coderules.test.msd
index 6ae4c4e4..7ca02b5e 100644
--- a/coderules/solutions/jetbrains.mps.coderules.test/jetbrains.mps.coderules.test.msd
+++ b/coderules/solutions/jetbrains.mps.coderules.test/jetbrains.mps.coderules.test.msd
@@ -51,6 +51,7 @@
     <module reference="fdaaf35f-8ee3-4c37-b09d-9efaeaaa7a41(jetbrains.mps.core.tool.environment)" version="0" />
     <module reference="2d3c70e9-aab2-4870-8d8d-6036800e4103(jetbrains.mps.kernel)" version="0" />
     <module reference="ceab5195-25ea-4f22-9b92-103b95ca8c0c(jetbrains.mps.lang.core)" version="0" />
+    <module reference="9e98f4e2-decf-4e97-bf80-9109e8b759aa(jetbrains.mps.lang.feedback.context)" version="0" />
     <module reference="8585453e-6bfb-4d80-98de-b16074f1d86c(jetbrains.mps.lang.test)" version="0" />
     <module reference="707c4fde-f79a-44b5-b3d7-b5cef8844ccf(jetbrains.mps.lang.test.runtime)" version="0" />
     <module reference="9ded098b-ad6a-4657-bfd9-48636cfe8bc3(jetbrains.mps.lang.traceable)" version="0" />
diff --git a/coderules/solutions/jetbrains.mps.coderules.test/models/modelcheck@tests.mps b/coderules/solutions/jetbrains.mps.coderules.test/models/modelcheck@tests.mps
index 52b1ca72..dfc9bebf 100644
--- a/coderules/solutions/jetbrains.mps.coderules.test/models/modelcheck@tests.mps
+++ b/coderules/solutions/jetbrains.mps.coderules.test/models/modelcheck@tests.mps
@@ -322,7 +322,7 @@
           </node>
           <node concept="2ShNRf" id="1Lr58WFVLXH" role="HW$Y0">
             <node concept="1pGfFk" id="1Lr58WFVLXI" role="2ShVmc">
-              <ref role="37wK5l" to="wsw7:6qi2OtU3uwS" resolve="ConstraintsChecker" />
+              <ref role="37wK5l" to="wsw7:6qi2OtU3uwS" resolve="ConstraintsCheckerOld" />
             </node>
           </node>
           <node concept="2ShNRf" id="1Lr58WFVNK6" role="HW$Y0">
@@ -352,7 +352,7 @@
           </node>
           <node concept="2ShNRf" id="1Lr58WFWe0Z" role="HW$Y0">
             <node concept="1pGfFk" id="1Lr58WFWheJ" role="2ShVmc">
-              <ref role="37wK5l" to="wsw7:6qi2OtU3tXr" resolve="RefScopeChecker" />
+              <ref role="37wK5l" to="wsw7:6qi2OtU3tXr" resolve="RefScopeCheckerOld" />
             </node>
           </node>
           <node concept="2ShNRf" id="4CMgQNqo2MQ" role="HW$Y0">
diff --git a/coderules/solutions/jetbrains.mps.coderules.typechecking.test/jetbrains.mps.coderules.typechecking.test.msd b/coderules/solutions/jetbrains.mps.coderules.typechecking.test/jetbrains.mps.coderules.typechecking.test.msd
index 16c9f0b0..20069b50 100644
--- a/coderules/solutions/jetbrains.mps.coderules.typechecking.test/jetbrains.mps.coderules.typechecking.test.msd
+++ b/coderules/solutions/jetbrains.mps.coderules.typechecking.test/jetbrains.mps.coderules.typechecking.test.msd
@@ -54,6 +54,7 @@
     <module reference="26e8f4ce-2a35-4f44-8065-e5ba154b18e9(jetbrains.mps.lang.coderules.runtime)" version="0" />
     <module reference="ff6372a2-2f45-4ec3-952b-02581666015f(jetbrains.mps.lang.coderules.template)" version="0" />
     <module reference="ceab5195-25ea-4f22-9b92-103b95ca8c0c(jetbrains.mps.lang.core)" version="0" />
+    <module reference="9e98f4e2-decf-4e97-bf80-9109e8b759aa(jetbrains.mps.lang.feedback.context)" version="0" />
     <module reference="f486b8aa-5b2d-4ec0-8ef5-8f45d773fb84(jetbrains.mps.lang.typechecking.runtime)" version="0" />
     <module reference="bbf5c548-7111-4a53-a117-cdefc664cf34(jetbrains.mps.logic.reactor)" version="0" />
     <module reference="a5478664-6b44-4c62-a9f7-434f8aa57eee(jetbrains.mps.logic.runtime)" version="0" />
diff --git a/coderules/solutions/jetbrains.mps.coderules.typechecking.ui/jetbrains.mps.coderules.typechecking.ui.msd b/coderules/solutions/jetbrains.mps.coderules.typechecking.ui/jetbrains.mps.coderules.typechecking.ui.msd
index a76c23c2..59c53256 100644
--- a/coderules/solutions/jetbrains.mps.coderules.typechecking.ui/jetbrains.mps.coderules.typechecking.ui.msd
+++ b/coderules/solutions/jetbrains.mps.coderules.typechecking.ui/jetbrains.mps.coderules.typechecking.ui.msd
@@ -57,6 +57,7 @@
     <module reference="26e8f4ce-2a35-4f44-8065-e5ba154b18e9(jetbrains.mps.lang.coderules.runtime)" version="0" />
     <module reference="ff6372a2-2f45-4ec3-952b-02581666015f(jetbrains.mps.lang.coderules.template)" version="0" />
     <module reference="ceab5195-25ea-4f22-9b92-103b95ca8c0c(jetbrains.mps.lang.core)" version="0" />
+    <module reference="9e98f4e2-decf-4e97-bf80-9109e8b759aa(jetbrains.mps.lang.feedback.context)" version="0" />
     <module reference="f486b8aa-5b2d-4ec0-8ef5-8f45d773fb84(jetbrains.mps.lang.typechecking.runtime)" version="0" />
     <module reference="bbf5c548-7111-4a53-a117-cdefc664cf34(jetbrains.mps.logic.reactor)" version="0" />
     <module reference="a5478664-6b44-4c62-a9f7-434f8aa57eee(jetbrains.mps.logic.runtime)" version="0" />
diff --git a/coderules/solutions/jetbrains.mps.coderules.typechecking/jetbrains.mps.coderules.typechecking.msd b/coderules/solutions/jetbrains.mps.coderules.typechecking/jetbrains.mps.coderules.typechecking.msd
index afa8561b..382634fc 100644
--- a/coderules/solutions/jetbrains.mps.coderules.typechecking/jetbrains.mps.coderules.typechecking.msd
+++ b/coderules/solutions/jetbrains.mps.coderules.typechecking/jetbrains.mps.coderules.typechecking.msd
@@ -59,6 +59,7 @@
     <module reference="26e8f4ce-2a35-4f44-8065-e5ba154b18e9(jetbrains.mps.lang.coderules.runtime)" version="0" />
     <module reference="ff6372a2-2f45-4ec3-952b-02581666015f(jetbrains.mps.lang.coderules.template)" version="0" />
     <module reference="ceab5195-25ea-4f22-9b92-103b95ca8c0c(jetbrains.mps.lang.core)" version="0" />
+    <module reference="9e98f4e2-decf-4e97-bf80-9109e8b759aa(jetbrains.mps.lang.feedback.context)" version="0" />
     <module reference="446c26eb-2b7b-4bf0-9b35-f83fa582753e(jetbrains.mps.lang.modelapi)" version="0" />
     <module reference="7866978e-a0f0-4cc7-81bc-4d213d9375e1(jetbrains.mps.lang.smodel)" version="1" />
     <module reference="c72da2b9-7cce-4447-8389-f407dc1158b7(jetbrains.mps.lang.structure)" version="0" />
diff --git a/coderules/solutions/jetbrains.mps.coderules.ui/jetbrains.mps.coderules.ui.msd b/coderules/solutions/jetbrains.mps.coderules.ui/jetbrains.mps.coderules.ui.msd
index dacb40fc..24dbb671 100644
--- a/coderules/solutions/jetbrains.mps.coderules.ui/jetbrains.mps.coderules.ui.msd
+++ b/coderules/solutions/jetbrains.mps.coderules.ui/jetbrains.mps.coderules.ui.msd
@@ -46,6 +46,7 @@
     <module reference="26e8f4ce-2a35-4f44-8065-e5ba154b18e9(jetbrains.mps.lang.coderules.runtime)" version="0" />
     <module reference="ff6372a2-2f45-4ec3-952b-02581666015f(jetbrains.mps.lang.coderules.template)" version="0" />
     <module reference="ceab5195-25ea-4f22-9b92-103b95ca8c0c(jetbrains.mps.lang.core)" version="0" />
+    <module reference="9e98f4e2-decf-4e97-bf80-9109e8b759aa(jetbrains.mps.lang.feedback.context)" version="0" />
     <module reference="bbf5c548-7111-4a53-a117-cdefc664cf34(jetbrains.mps.logic.reactor)" version="0" />
     <module reference="a5478664-6b44-4c62-a9f7-434f8aa57eee(jetbrains.mps.logic.runtime)" version="0" />
     <module reference="da80355b-a098-4248-9ec8-70d10dd7e9af(jetbrains.mps.reporting.runtime)" version="0" />
diff --git a/coderules/solutions/jetbrains.mps.coderules/jetbrains.mps.coderules.msd b/coderules/solutions/jetbrains.mps.coderules/jetbrains.mps.coderules.msd
index 70a9cbdb..ad5ed5a8 100644
--- a/coderules/solutions/jetbrains.mps.coderules/jetbrains.mps.coderules.msd
+++ b/coderules/solutions/jetbrains.mps.coderules/jetbrains.mps.coderules.msd
@@ -51,6 +51,7 @@
     <module reference="26e8f4ce-2a35-4f44-8065-e5ba154b18e9(jetbrains.mps.lang.coderules.runtime)" version="0" />
     <module reference="ff6372a2-2f45-4ec3-952b-02581666015f(jetbrains.mps.lang.coderules.template)" version="0" />
     <module reference="ceab5195-25ea-4f22-9b92-103b95ca8c0c(jetbrains.mps.lang.core)" version="0" />
+    <module reference="9e98f4e2-decf-4e97-bf80-9109e8b759aa(jetbrains.mps.lang.feedback.context)" version="0" />
     <module reference="bbf5c548-7111-4a53-a117-cdefc664cf34(jetbrains.mps.logic.reactor)" version="0" />
     <module reference="a5478664-6b44-4c62-a9f7-434f8aa57eee(jetbrains.mps.logic.runtime)" version="0" />
     <module reference="da80355b-a098-4248-9ec8-70d10dd7e9af(jetbrains.mps.reporting.runtime)" version="0" />
diff --git a/coderules/solutions/jetbrains.mps.controlflow.ui/jetbrains.mps.controlflow.ui.msd b/coderules/solutions/jetbrains.mps.controlflow.ui/jetbrains.mps.controlflow.ui.msd
index bc34d9a9..d94fcf18 100644
--- a/coderules/solutions/jetbrains.mps.controlflow.ui/jetbrains.mps.controlflow.ui.msd
+++ b/coderules/solutions/jetbrains.mps.controlflow.ui/jetbrains.mps.controlflow.ui.msd
@@ -49,6 +49,7 @@
     <module reference="26e8f4ce-2a35-4f44-8065-e5ba154b18e9(jetbrains.mps.lang.coderules.runtime)" version="0" />
     <module reference="ff6372a2-2f45-4ec3-952b-02581666015f(jetbrains.mps.lang.coderules.template)" version="0" />
     <module reference="ffcd9ef5-e931-4da9-a8d1-eb9bf80d19b4(jetbrains.mps.lang.controlflow.runtime)" version="0" />
+    <module reference="9e98f4e2-decf-4e97-bf80-9109e8b759aa(jetbrains.mps.lang.feedback.context)" version="0" />
     <module reference="bbf5c548-7111-4a53-a117-cdefc664cf34(jetbrains.mps.logic.reactor)" version="0" />
     <module reference="a5478664-6b44-4c62-a9f7-434f8aa57eee(jetbrains.mps.logic.runtime)" version="0" />
     <module reference="a1250a4d-c090-42c3-ad7c-d298a3357dd4(jetbrains.mps.make.runtime)" version="0" />
diff --git a/coderules/solutions/jetbrains.mps.controlflow/jetbrains.mps.controlflow.msd b/coderules/solutions/jetbrains.mps.controlflow/jetbrains.mps.controlflow.msd
index a1766fd5..62fb8758 100644
--- a/coderules/solutions/jetbrains.mps.controlflow/jetbrains.mps.controlflow.msd
+++ b/coderules/solutions/jetbrains.mps.controlflow/jetbrains.mps.controlflow.msd
@@ -30,6 +30,7 @@
     <module reference="517911e5-605f-4310-831b-10d44e0f5237(jetbrains.mps.controlflow)" version="0" />
     <module reference="26e8f4ce-2a35-4f44-8065-e5ba154b18e9(jetbrains.mps.lang.coderules.runtime)" version="0" />
     <module reference="ff6372a2-2f45-4ec3-952b-02581666015f(jetbrains.mps.lang.coderules.template)" version="0" />
+    <module reference="9e98f4e2-decf-4e97-bf80-9109e8b759aa(jetbrains.mps.lang.feedback.context)" version="0" />
     <module reference="bbf5c548-7111-4a53-a117-cdefc664cf34(jetbrains.mps.logic.reactor)" version="0" />
     <module reference="a5478664-6b44-4c62-a9f7-434f8aa57eee(jetbrains.mps.logic.runtime)" version="0" />
     <module reference="da80355b-a098-4248-9ec8-70d10dd7e9af(jetbrains.mps.reporting.runtime)" version="0" />
diff --git a/coderules/solutions/jetbrains.mps.lang.coderules.template/jetbrains.mps.lang.coderules.template.msd b/coderules/solutions/jetbrains.mps.lang.coderules.template/jetbrains.mps.lang.coderules.template.msd
index a653fe61..39d34249 100644
--- a/coderules/solutions/jetbrains.mps.lang.coderules.template/jetbrains.mps.lang.coderules.template.msd
+++ b/coderules/solutions/jetbrains.mps.lang.coderules.template/jetbrains.mps.lang.coderules.template.msd
@@ -34,6 +34,7 @@
     <module reference="6ed54515-acc8-4d1e-a16c-9fd6cfe951ea(MPS.Core)" version="0" />
     <module reference="8865b7a8-5271-43d3-884c-6fd1d9cfdd34(MPS.OpenAPI)" version="0" />
     <module reference="ff6372a2-2f45-4ec3-952b-02581666015f(jetbrains.mps.lang.coderules.template)" version="0" />
+    <module reference="9e98f4e2-decf-4e97-bf80-9109e8b759aa(jetbrains.mps.lang.feedback.context)" version="0" />
     <module reference="bbf5c548-7111-4a53-a117-cdefc664cf34(jetbrains.mps.logic.reactor)" version="0" />
     <module reference="a5478664-6b44-4c62-a9f7-434f8aa57eee(jetbrains.mps.logic.runtime)" version="0" />
     <module reference="da80355b-a098-4248-9ec8-70d10dd7e9af(jetbrains.mps.reporting.runtime)" version="0" />
diff --git a/coderules/solutions/jetbrains.mps.lang.controlflow.runtime/jetbrains.mps.lang.controlflow.runtime.msd b/coderules/solutions/jetbrains.mps.lang.controlflow.runtime/jetbrains.mps.lang.controlflow.runtime.msd
index 45307b31..a249cd7b 100644
--- a/coderules/solutions/jetbrains.mps.lang.controlflow.runtime/jetbrains.mps.lang.controlflow.runtime.msd
+++ b/coderules/solutions/jetbrains.mps.lang.controlflow.runtime/jetbrains.mps.lang.controlflow.runtime.msd
@@ -29,6 +29,7 @@
     <module reference="8865b7a8-5271-43d3-884c-6fd1d9cfdd34(MPS.OpenAPI)" version="0" />
     <module reference="ff6372a2-2f45-4ec3-952b-02581666015f(jetbrains.mps.lang.coderules.template)" version="0" />
     <module reference="ffcd9ef5-e931-4da9-a8d1-eb9bf80d19b4(jetbrains.mps.lang.controlflow.runtime)" version="0" />
+    <module reference="9e98f4e2-decf-4e97-bf80-9109e8b759aa(jetbrains.mps.lang.feedback.context)" version="0" />
     <module reference="bbf5c548-7111-4a53-a117-cdefc664cf34(jetbrains.mps.logic.reactor)" version="0" />
     <module reference="a5478664-6b44-4c62-a9f7-434f8aa57eee(jetbrains.mps.logic.runtime)" version="0" />
     <module reference="da80355b-a098-4248-9ec8-70d10dd7e9af(jetbrains.mps.reporting.runtime)" version="0" />
diff --git a/coderules/solutions/jetbrains.mps.lang.typechecking.runtime/jetbrains.mps.lang.typechecking.runtime.msd b/coderules/solutions/jetbrains.mps.lang.typechecking.runtime/jetbrains.mps.lang.typechecking.runtime.msd
index d00398b0..0461eb78 100644
--- a/coderules/solutions/jetbrains.mps.lang.typechecking.runtime/jetbrains.mps.lang.typechecking.runtime.msd
+++ b/coderules/solutions/jetbrains.mps.lang.typechecking.runtime/jetbrains.mps.lang.typechecking.runtime.msd
@@ -26,6 +26,7 @@
     <module reference="6ed54515-acc8-4d1e-a16c-9fd6cfe951ea(MPS.Core)" version="0" />
     <module reference="8865b7a8-5271-43d3-884c-6fd1d9cfdd34(MPS.OpenAPI)" version="0" />
     <module reference="ff6372a2-2f45-4ec3-952b-02581666015f(jetbrains.mps.lang.coderules.template)" version="0" />
+    <module reference="9e98f4e2-decf-4e97-bf80-9109e8b759aa(jetbrains.mps.lang.feedback.context)" version="0" />
     <module reference="f486b8aa-5b2d-4ec0-8ef5-8f45d773fb84(jetbrains.mps.lang.typechecking.runtime)" version="0" />
     <module reference="bbf5c548-7111-4a53-a117-cdefc664cf34(jetbrains.mps.logic.reactor)" version="0" />
     <module reference="a5478664-6b44-4c62-a9f7-434f8aa57eee(jetbrains.mps.logic.runtime)" version="0" />
diff --git a/coderules/solutions/jetbrains.mps.logic.reactor/jetbrains.mps.logic.reactor.msd b/coderules/solutions/jetbrains.mps.logic.reactor/jetbrains.mps.logic.reactor.msd
index 16626bfd..b7b3d3fb 100644
--- a/coderules/solutions/jetbrains.mps.logic.reactor/jetbrains.mps.logic.reactor.msd
+++ b/coderules/solutions/jetbrains.mps.logic.reactor/jetbrains.mps.logic.reactor.msd
@@ -28,6 +28,7 @@
     <module reference="6ed54515-acc8-4d1e-a16c-9fd6cfe951ea(MPS.Core)" version="0" />
     <module reference="498d89d2-c2e9-11e2-ad49-6cf049e62fe5(MPS.IDEA)" version="0" />
     <module reference="8865b7a8-5271-43d3-884c-6fd1d9cfdd34(MPS.OpenAPI)" version="0" />
+    <module reference="9e98f4e2-decf-4e97-bf80-9109e8b759aa(jetbrains.mps.lang.feedback.context)" version="0" />
     <module reference="bbf5c548-7111-4a53-a117-cdefc664cf34(jetbrains.mps.logic.reactor)" version="0" />
   </dependencyVersions>
 </solution>
diff --git a/coderules/solutions/jetbrains.mps.reporting.runtime/jetbrains.mps.reporting.runtime.msd b/coderules/solutions/jetbrains.mps.reporting.runtime/jetbrains.mps.reporting.runtime.msd
index 1c08103e..b6488501 100644
--- a/coderules/solutions/jetbrains.mps.reporting.runtime/jetbrains.mps.reporting.runtime.msd
+++ b/coderules/solutions/jetbrains.mps.reporting.runtime/jetbrains.mps.reporting.runtime.msd
@@ -26,6 +26,7 @@
     <module reference="6354ebe7-c22a-4a0f-ac54-50b52ab9b065(JDK)" version="0" />
     <module reference="6ed54515-acc8-4d1e-a16c-9fd6cfe951ea(MPS.Core)" version="0" />
     <module reference="8865b7a8-5271-43d3-884c-6fd1d9cfdd34(MPS.OpenAPI)" version="0" />
+    <module reference="9e98f4e2-decf-4e97-bf80-9109e8b759aa(jetbrains.mps.lang.feedback.context)" version="0" />
     <module reference="bbf5c548-7111-4a53-a117-cdefc664cf34(jetbrains.mps.logic.reactor)" version="0" />
     <module reference="da80355b-a098-4248-9ec8-70d10dd7e9af(jetbrains.mps.reporting.runtime)" version="0" />
   </dependencyVersions>
diff --git a/samples/fitch/languages/samples.fitch.firstOrderLogic/samples.fitch.firstOrderLogic.mpl b/samples/fitch/languages/samples.fitch.firstOrderLogic/samples.fitch.firstOrderLogic.mpl
index 68b6405e..2a3e6461 100644
--- a/samples/fitch/languages/samples.fitch.firstOrderLogic/samples.fitch.firstOrderLogic.mpl
+++ b/samples/fitch/languages/samples.fitch.firstOrderLogic/samples.fitch.firstOrderLogic.mpl
@@ -38,6 +38,7 @@
         <module reference="6ed54515-acc8-4d1e-a16c-9fd6cfe951ea(MPS.Core)" version="0" />
         <module reference="8865b7a8-5271-43d3-884c-6fd1d9cfdd34(MPS.OpenAPI)" version="0" />
         <module reference="ceab5195-25ea-4f22-9b92-103b95ca8c0c(jetbrains.mps.lang.core)" version="0" />
+        <module reference="9e98f4e2-decf-4e97-bf80-9109e8b759aa(jetbrains.mps.lang.feedback.context)" version="0" />
         <module reference="06b7c5c7-e359-4f4b-a581-5d0c9323af39(samples.fitch)" version="1" />
         <module reference="ddb01c98-e78e-4c79-b11a-aeba193668d4(samples.fitch.firstOrderLogic)" version="0" />
         <module reference="467b3222-f5a8-48be-9fe1-6c009ed73049(samples.fitch.firstOrderLogic#4035326440039985569)" version="0" />
@@ -69,6 +70,12 @@
     <language slang="l:fe9d76d7-5809-45c9-ae28-a40915b4d6ff:jetbrains.mps.lang.checkedName" version="1" />
     <language slang="l:c4803b19-6d89-4a3b-bf82-390769514add:jetbrains.mps.lang.coderules" version="15" />
     <language slang="l:3f4bc5f5-c6c1-4a28-8b10-c83066ffa4a1:jetbrains.mps.lang.constraints" version="5" />
+    <language slang="l:e51810c5-7308-4642-bcb6-469e61b5dd18:jetbrains.mps.lang.constraints.msgSpecification" version="0" />
+    <language slang="l:47257bf3-78d3-470b-89d9-8c3261a61d15:jetbrains.mps.lang.constraints.rules" version="0" />
+    <language slang="l:5dae8159-ab99-46bb-a40d-0cee30ee7018:jetbrains.mps.lang.constraints.rules.kinds" version="0" />
+    <language slang="l:134c38d4-e3af-4d9e-b069-1c7df0a4005d:jetbrains.mps.lang.constraints.rules.skeleton" version="0" />
+    <language slang="l:3ad5badc-1d9c-461c-b7b1-fa2fcd0a0ae7:jetbrains.mps.lang.context" version="0" />
+    <language slang="l:ea3159bf-f48e-4720-bde2-86dba75f0d34:jetbrains.mps.lang.context.defs" version="0" />
     <language slang="l:ceab5195-25ea-4f22-9b92-103b95ca8c0c:jetbrains.mps.lang.core" version="2" />
     <language slang="l:7fa12e9c-b949-4976-b4fa-19accbc320b4:jetbrains.mps.lang.dataFlow" version="1" />
     <language slang="l:f4ad079d-bc71-4ffb-9600-9328705cf998:jetbrains.mps.lang.descriptor" version="0" />
@@ -77,11 +84,13 @@
     <language slang="l:b401a680-8325-4110-8fd3-84331ff25bef:jetbrains.mps.lang.generator" version="3" />
     <language slang="l:d7706f63-9be2-479c-a3da-ae92af1e64d5:jetbrains.mps.lang.generator.generationContext" version="2" />
     <language slang="l:d7a92d38-f7db-40d0-8431-763b0c3c9f20:jetbrains.mps.lang.intentions" version="1" />
+    <language slang="l:ad93155d-79b2-4759-b10c-55123e763903:jetbrains.mps.lang.messages" version="0" />
     <language slang="l:446c26eb-2b7b-4bf0-9b35-f83fa582753e:jetbrains.mps.lang.modelapi" version="0" />
     <language slang="l:d4615e3b-d671-4ba9-af01-2b78369b0ba7:jetbrains.mps.lang.pattern" version="2" />
     <language slang="l:3a13115c-633c-4c5c-bbcc-75c4219e9555:jetbrains.mps.lang.quotation" version="3" />
     <language slang="l:3ecd7c84-cde3-45de-886c-135ecc69b742:jetbrains.mps.lang.refactoring" version="0" />
     <language slang="l:982eb8df-2c96-4bd7-9963-11712ea622e5:jetbrains.mps.lang.resources" version="2" />
+    <language slang="l:b3551702-269c-4f05-ba61-58060cef4292:jetbrains.mps.lang.rulesAndMessages" version="0" />
     <language slang="l:0eddeefa-c2d6-4437-bc2c-de50fd4ce470:jetbrains.mps.lang.script" version="1" />
     <language slang="l:13744753-c81f-424a-9c1b-cf8943bf4e86:jetbrains.mps.lang.sharedConcepts" version="0" />
     <language slang="l:7866978e-a0f0-4cc7-81bc-4d213d9375e1:jetbrains.mps.lang.smodel" version="17" />
@@ -112,6 +121,7 @@
     <module reference="ceab5195-25ea-4f22-9b92-103b95ca8c0c(jetbrains.mps.lang.core)" version="0" />
     <module reference="f4ad079d-bc71-4ffb-9600-9328705cf998(jetbrains.mps.lang.descriptor)" version="0" />
     <module reference="a9e4c532-c5f5-4bb7-99ef-42abb73bbb70(jetbrains.mps.lang.descriptor.aspects)" version="0" />
+    <module reference="9e98f4e2-decf-4e97-bf80-9109e8b759aa(jetbrains.mps.lang.feedback.context)" version="0" />
     <module reference="446c26eb-2b7b-4bf0-9b35-f83fa582753e(jetbrains.mps.lang.modelapi)" version="0" />
     <module reference="7866978e-a0f0-4cc7-81bc-4d213d9375e1(jetbrains.mps.lang.smodel)" version="1" />
     <module reference="c72da2b9-7cce-4447-8389-f407dc1158b7(jetbrains.mps.lang.structure)" version="0" />
diff --git a/samples/fitch/languages/samples.fitch.herbrandLogic/samples.fitch.herbrandLogic.mpl b/samples/fitch/languages/samples.fitch.herbrandLogic/samples.fitch.herbrandLogic.mpl
index 94248626..f6f69c3b 100644
--- a/samples/fitch/languages/samples.fitch.herbrandLogic/samples.fitch.herbrandLogic.mpl
+++ b/samples/fitch/languages/samples.fitch.herbrandLogic/samples.fitch.herbrandLogic.mpl
@@ -38,6 +38,7 @@
         <module reference="6ed54515-acc8-4d1e-a16c-9fd6cfe951ea(MPS.Core)" version="0" />
         <module reference="8865b7a8-5271-43d3-884c-6fd1d9cfdd34(MPS.OpenAPI)" version="0" />
         <module reference="ceab5195-25ea-4f22-9b92-103b95ca8c0c(jetbrains.mps.lang.core)" version="0" />
+        <module reference="9e98f4e2-decf-4e97-bf80-9109e8b759aa(jetbrains.mps.lang.feedback.context)" version="0" />
         <module reference="06b7c5c7-e359-4f4b-a581-5d0c9323af39(samples.fitch)" version="1" />
         <module reference="748b3ba1-2791-4ee8-b985-a5598baa7112(samples.fitch.herbrandLogic)" version="0" />
         <module reference="8efed383-9c82-409e-81c8-4bd2a012c164(samples.fitch.herbrandLogic#3059457401298723545)" version="0" />
@@ -70,6 +71,12 @@
     <language slang="l:fe9d76d7-5809-45c9-ae28-a40915b4d6ff:jetbrains.mps.lang.checkedName" version="1" />
     <language slang="l:c4803b19-6d89-4a3b-bf82-390769514add:jetbrains.mps.lang.coderules" version="15" />
     <language slang="l:3f4bc5f5-c6c1-4a28-8b10-c83066ffa4a1:jetbrains.mps.lang.constraints" version="5" />
+    <language slang="l:e51810c5-7308-4642-bcb6-469e61b5dd18:jetbrains.mps.lang.constraints.msgSpecification" version="0" />
+    <language slang="l:47257bf3-78d3-470b-89d9-8c3261a61d15:jetbrains.mps.lang.constraints.rules" version="0" />
+    <language slang="l:5dae8159-ab99-46bb-a40d-0cee30ee7018:jetbrains.mps.lang.constraints.rules.kinds" version="0" />
+    <language slang="l:134c38d4-e3af-4d9e-b069-1c7df0a4005d:jetbrains.mps.lang.constraints.rules.skeleton" version="0" />
+    <language slang="l:3ad5badc-1d9c-461c-b7b1-fa2fcd0a0ae7:jetbrains.mps.lang.context" version="0" />
+    <language slang="l:ea3159bf-f48e-4720-bde2-86dba75f0d34:jetbrains.mps.lang.context.defs" version="0" />
     <language slang="l:ceab5195-25ea-4f22-9b92-103b95ca8c0c:jetbrains.mps.lang.core" version="2" />
     <language slang="l:7fa12e9c-b949-4976-b4fa-19accbc320b4:jetbrains.mps.lang.dataFlow" version="1" />
     <language slang="l:f4ad079d-bc71-4ffb-9600-9328705cf998:jetbrains.mps.lang.descriptor" version="0" />
@@ -78,11 +85,13 @@
     <language slang="l:b401a680-8325-4110-8fd3-84331ff25bef:jetbrains.mps.lang.generator" version="3" />
     <language slang="l:d7706f63-9be2-479c-a3da-ae92af1e64d5:jetbrains.mps.lang.generator.generationContext" version="2" />
     <language slang="l:d7a92d38-f7db-40d0-8431-763b0c3c9f20:jetbrains.mps.lang.intentions" version="1" />
+    <language slang="l:ad93155d-79b2-4759-b10c-55123e763903:jetbrains.mps.lang.messages" version="0" />
     <language slang="l:446c26eb-2b7b-4bf0-9b35-f83fa582753e:jetbrains.mps.lang.modelapi" version="0" />
     <language slang="l:d4615e3b-d671-4ba9-af01-2b78369b0ba7:jetbrains.mps.lang.pattern" version="2" />
     <language slang="l:3a13115c-633c-4c5c-bbcc-75c4219e9555:jetbrains.mps.lang.quotation" version="3" />
     <language slang="l:3ecd7c84-cde3-45de-886c-135ecc69b742:jetbrains.mps.lang.refactoring" version="0" />
     <language slang="l:982eb8df-2c96-4bd7-9963-11712ea622e5:jetbrains.mps.lang.resources" version="2" />
+    <language slang="l:b3551702-269c-4f05-ba61-58060cef4292:jetbrains.mps.lang.rulesAndMessages" version="0" />
     <language slang="l:0eddeefa-c2d6-4437-bc2c-de50fd4ce470:jetbrains.mps.lang.script" version="1" />
     <language slang="l:13744753-c81f-424a-9c1b-cf8943bf4e86:jetbrains.mps.lang.sharedConcepts" version="0" />
     <language slang="l:7866978e-a0f0-4cc7-81bc-4d213d9375e1:jetbrains.mps.lang.smodel" version="17" />
@@ -114,6 +123,7 @@
     <module reference="ceab5195-25ea-4f22-9b92-103b95ca8c0c(jetbrains.mps.lang.core)" version="0" />
     <module reference="f4ad079d-bc71-4ffb-9600-9328705cf998(jetbrains.mps.lang.descriptor)" version="0" />
     <module reference="a9e4c532-c5f5-4bb7-99ef-42abb73bbb70(jetbrains.mps.lang.descriptor.aspects)" version="0" />
+    <module reference="9e98f4e2-decf-4e97-bf80-9109e8b759aa(jetbrains.mps.lang.feedback.context)" version="0" />
     <module reference="446c26eb-2b7b-4bf0-9b35-f83fa582753e(jetbrains.mps.lang.modelapi)" version="0" />
     <module reference="7866978e-a0f0-4cc7-81bc-4d213d9375e1(jetbrains.mps.lang.smodel)" version="1" />
     <module reference="c72da2b9-7cce-4447-8389-f407dc1158b7(jetbrains.mps.lang.structure)" version="0" />
diff --git a/samples/fitch/languages/samples.fitch.propositionalLogic/samples.fitch.propositionalLogic.mpl b/samples/fitch/languages/samples.fitch.propositionalLogic/samples.fitch.propositionalLogic.mpl
index 4397e017..f000291b 100644
--- a/samples/fitch/languages/samples.fitch.propositionalLogic/samples.fitch.propositionalLogic.mpl
+++ b/samples/fitch/languages/samples.fitch.propositionalLogic/samples.fitch.propositionalLogic.mpl
@@ -38,6 +38,7 @@
         <module reference="6ed54515-acc8-4d1e-a16c-9fd6cfe951ea(MPS.Core)" version="0" />
         <module reference="8865b7a8-5271-43d3-884c-6fd1d9cfdd34(MPS.OpenAPI)" version="0" />
         <module reference="ceab5195-25ea-4f22-9b92-103b95ca8c0c(jetbrains.mps.lang.core)" version="0" />
+        <module reference="9e98f4e2-decf-4e97-bf80-9109e8b759aa(jetbrains.mps.lang.feedback.context)" version="0" />
         <module reference="06b7c5c7-e359-4f4b-a581-5d0c9323af39(samples.fitch)" version="1" />
         <module reference="ec79e64d-4cbb-4f6c-b7b7-108dd125aba6(samples.fitch.propositionalLogic)" version="0" />
         <module reference="53b8ab24-cc4a-4fe2-b461-11a91d798670(samples.fitch.propositionalLogic#5505606474790531941)" version="0" />
@@ -68,6 +69,12 @@
     <language slang="l:fe9d76d7-5809-45c9-ae28-a40915b4d6ff:jetbrains.mps.lang.checkedName" version="1" />
     <language slang="l:c4803b19-6d89-4a3b-bf82-390769514add:jetbrains.mps.lang.coderules" version="15" />
     <language slang="l:3f4bc5f5-c6c1-4a28-8b10-c83066ffa4a1:jetbrains.mps.lang.constraints" version="5" />
+    <language slang="l:e51810c5-7308-4642-bcb6-469e61b5dd18:jetbrains.mps.lang.constraints.msgSpecification" version="0" />
+    <language slang="l:47257bf3-78d3-470b-89d9-8c3261a61d15:jetbrains.mps.lang.constraints.rules" version="0" />
+    <language slang="l:5dae8159-ab99-46bb-a40d-0cee30ee7018:jetbrains.mps.lang.constraints.rules.kinds" version="0" />
+    <language slang="l:134c38d4-e3af-4d9e-b069-1c7df0a4005d:jetbrains.mps.lang.constraints.rules.skeleton" version="0" />
+    <language slang="l:3ad5badc-1d9c-461c-b7b1-fa2fcd0a0ae7:jetbrains.mps.lang.context" version="0" />
+    <language slang="l:ea3159bf-f48e-4720-bde2-86dba75f0d34:jetbrains.mps.lang.context.defs" version="0" />
     <language slang="l:ceab5195-25ea-4f22-9b92-103b95ca8c0c:jetbrains.mps.lang.core" version="2" />
     <language slang="l:7fa12e9c-b949-4976-b4fa-19accbc320b4:jetbrains.mps.lang.dataFlow" version="1" />
     <language slang="l:f4ad079d-bc71-4ffb-9600-9328705cf998:jetbrains.mps.lang.descriptor" version="0" />
@@ -76,11 +83,13 @@
     <language slang="l:b401a680-8325-4110-8fd3-84331ff25bef:jetbrains.mps.lang.generator" version="3" />
     <language slang="l:d7706f63-9be2-479c-a3da-ae92af1e64d5:jetbrains.mps.lang.generator.generationContext" version="2" />
     <language slang="l:d7a92d38-f7db-40d0-8431-763b0c3c9f20:jetbrains.mps.lang.intentions" version="1" />
+    <language slang="l:ad93155d-79b2-4759-b10c-55123e763903:jetbrains.mps.lang.messages" version="0" />
     <language slang="l:446c26eb-2b7b-4bf0-9b35-f83fa582753e:jetbrains.mps.lang.modelapi" version="0" />
     <language slang="l:d4615e3b-d671-4ba9-af01-2b78369b0ba7:jetbrains.mps.lang.pattern" version="2" />
     <language slang="l:3a13115c-633c-4c5c-bbcc-75c4219e9555:jetbrains.mps.lang.quotation" version="3" />
     <language slang="l:3ecd7c84-cde3-45de-886c-135ecc69b742:jetbrains.mps.lang.refactoring" version="0" />
     <language slang="l:982eb8df-2c96-4bd7-9963-11712ea622e5:jetbrains.mps.lang.resources" version="2" />
+    <language slang="l:b3551702-269c-4f05-ba61-58060cef4292:jetbrains.mps.lang.rulesAndMessages" version="0" />
     <language slang="l:0eddeefa-c2d6-4437-bc2c-de50fd4ce470:jetbrains.mps.lang.script" version="1" />
     <language slang="l:13744753-c81f-424a-9c1b-cf8943bf4e86:jetbrains.mps.lang.sharedConcepts" version="0" />
     <language slang="l:7866978e-a0f0-4cc7-81bc-4d213d9375e1:jetbrains.mps.lang.smodel" version="17" />
@@ -112,6 +121,7 @@
     <module reference="ceab5195-25ea-4f22-9b92-103b95ca8c0c(jetbrains.mps.lang.core)" version="0" />
     <module reference="f4ad079d-bc71-4ffb-9600-9328705cf998(jetbrains.mps.lang.descriptor)" version="0" />
     <module reference="a9e4c532-c5f5-4bb7-99ef-42abb73bbb70(jetbrains.mps.lang.descriptor.aspects)" version="0" />
+    <module reference="9e98f4e2-decf-4e97-bf80-9109e8b759aa(jetbrains.mps.lang.feedback.context)" version="0" />
     <module reference="446c26eb-2b7b-4bf0-9b35-f83fa582753e(jetbrains.mps.lang.modelapi)" version="0" />
     <module reference="7866978e-a0f0-4cc7-81bc-4d213d9375e1(jetbrains.mps.lang.smodel)" version="1" />
     <module reference="c72da2b9-7cce-4447-8389-f407dc1158b7(jetbrains.mps.lang.structure)" version="0" />
diff --git a/samples/fitch/languages/samples.fitch/samples.fitch.mpl b/samples/fitch/languages/samples.fitch/samples.fitch.mpl
index 918e510e..4886ca4f 100644
--- a/samples/fitch/languages/samples.fitch/samples.fitch.mpl
+++ b/samples/fitch/languages/samples.fitch/samples.fitch.mpl
@@ -38,6 +38,7 @@
         <module reference="6ed54515-acc8-4d1e-a16c-9fd6cfe951ea(MPS.Core)" version="0" />
         <module reference="8865b7a8-5271-43d3-884c-6fd1d9cfdd34(MPS.OpenAPI)" version="0" />
         <module reference="ceab5195-25ea-4f22-9b92-103b95ca8c0c(jetbrains.mps.lang.core)" version="0" />
+        <module reference="9e98f4e2-decf-4e97-bf80-9109e8b759aa(jetbrains.mps.lang.feedback.context)" version="0" />
         <module reference="06b7c5c7-e359-4f4b-a581-5d0c9323af39(samples.fitch)" version="1" />
         <module reference="65b2d9d2-5a92-4dd0-abf5-f3a1bd399bec(samples.fitch#4322786184247805322)" version="0" />
       </dependencyVersions>
@@ -68,6 +69,12 @@
     <language slang="l:fe9d76d7-5809-45c9-ae28-a40915b4d6ff:jetbrains.mps.lang.checkedName" version="1" />
     <language slang="l:c4803b19-6d89-4a3b-bf82-390769514add:jetbrains.mps.lang.coderules" version="15" />
     <language slang="l:3f4bc5f5-c6c1-4a28-8b10-c83066ffa4a1:jetbrains.mps.lang.constraints" version="5" />
+    <language slang="l:e51810c5-7308-4642-bcb6-469e61b5dd18:jetbrains.mps.lang.constraints.msgSpecification" version="0" />
+    <language slang="l:47257bf3-78d3-470b-89d9-8c3261a61d15:jetbrains.mps.lang.constraints.rules" version="0" />
+    <language slang="l:5dae8159-ab99-46bb-a40d-0cee30ee7018:jetbrains.mps.lang.constraints.rules.kinds" version="0" />
+    <language slang="l:134c38d4-e3af-4d9e-b069-1c7df0a4005d:jetbrains.mps.lang.constraints.rules.skeleton" version="0" />
+    <language slang="l:3ad5badc-1d9c-461c-b7b1-fa2fcd0a0ae7:jetbrains.mps.lang.context" version="0" />
+    <language slang="l:ea3159bf-f48e-4720-bde2-86dba75f0d34:jetbrains.mps.lang.context.defs" version="0" />
     <language slang="l:ceab5195-25ea-4f22-9b92-103b95ca8c0c:jetbrains.mps.lang.core" version="2" />
     <language slang="l:7fa12e9c-b949-4976-b4fa-19accbc320b4:jetbrains.mps.lang.dataFlow" version="1" />
     <language slang="l:f4ad079d-bc71-4ffb-9600-9328705cf998:jetbrains.mps.lang.descriptor" version="0" />
@@ -77,6 +84,7 @@
     <language slang="l:b401a680-8325-4110-8fd3-84331ff25bef:jetbrains.mps.lang.generator" version="3" />
     <language slang="l:d7706f63-9be2-479c-a3da-ae92af1e64d5:jetbrains.mps.lang.generator.generationContext" version="2" />
     <language slang="l:d7a92d38-f7db-40d0-8431-763b0c3c9f20:jetbrains.mps.lang.intentions" version="1" />
+    <language slang="l:ad93155d-79b2-4759-b10c-55123e763903:jetbrains.mps.lang.messages" version="0" />
     <language slang="l:90746344-04fd-4286-97d5-b46ae6a81709:jetbrains.mps.lang.migration" version="2" />
     <language slang="l:9882f4ad-1955-46fe-8269-94189e5dbbf2:jetbrains.mps.lang.migration.util" version="0" />
     <language slang="l:446c26eb-2b7b-4bf0-9b35-f83fa582753e:jetbrains.mps.lang.modelapi" version="0" />
@@ -84,6 +92,7 @@
     <language slang="l:3a13115c-633c-4c5c-bbcc-75c4219e9555:jetbrains.mps.lang.quotation" version="3" />
     <language slang="l:3ecd7c84-cde3-45de-886c-135ecc69b742:jetbrains.mps.lang.refactoring" version="0" />
     <language slang="l:982eb8df-2c96-4bd7-9963-11712ea622e5:jetbrains.mps.lang.resources" version="2" />
+    <language slang="l:b3551702-269c-4f05-ba61-58060cef4292:jetbrains.mps.lang.rulesAndMessages" version="0" />
     <language slang="l:0eddeefa-c2d6-4437-bc2c-de50fd4ce470:jetbrains.mps.lang.script" version="1" />
     <language slang="l:13744753-c81f-424a-9c1b-cf8943bf4e86:jetbrains.mps.lang.sharedConcepts" version="0" />
     <language slang="l:7866978e-a0f0-4cc7-81bc-4d213d9375e1:jetbrains.mps.lang.smodel" version="17" />
@@ -116,6 +125,7 @@
     <module reference="ceab5195-25ea-4f22-9b92-103b95ca8c0c(jetbrains.mps.lang.core)" version="0" />
     <module reference="f4ad079d-bc71-4ffb-9600-9328705cf998(jetbrains.mps.lang.descriptor)" version="0" />
     <module reference="a9e4c532-c5f5-4bb7-99ef-42abb73bbb70(jetbrains.mps.lang.descriptor.aspects)" version="0" />
+    <module reference="9e98f4e2-decf-4e97-bf80-9109e8b759aa(jetbrains.mps.lang.feedback.context)" version="0" />
     <module reference="446c26eb-2b7b-4bf0-9b35-f83fa582753e(jetbrains.mps.lang.modelapi)" version="0" />
     <module reference="7866978e-a0f0-4cc7-81bc-4d213d9375e1(jetbrains.mps.lang.smodel)" version="1" />
     <module reference="c72da2b9-7cce-4447-8389-f407dc1158b7(jetbrains.mps.lang.structure)" version="0" />
diff --git a/samples/fitch/solutions/samples.fitch.demo/samples.fitch.demo.msd b/samples/fitch/solutions/samples.fitch.demo/samples.fitch.demo.msd
index 0fc326d5..c0cdac12 100644
--- a/samples/fitch/solutions/samples.fitch.demo/samples.fitch.demo.msd
+++ b/samples/fitch/solutions/samples.fitch.demo/samples.fitch.demo.msd
@@ -40,6 +40,7 @@
     <module reference="26e8f4ce-2a35-4f44-8065-e5ba154b18e9(jetbrains.mps.lang.coderules.runtime)" version="0" />
     <module reference="ff6372a2-2f45-4ec3-952b-02581666015f(jetbrains.mps.lang.coderules.template)" version="0" />
     <module reference="ceab5195-25ea-4f22-9b92-103b95ca8c0c(jetbrains.mps.lang.core)" version="0" />
+    <module reference="9e98f4e2-decf-4e97-bf80-9109e8b759aa(jetbrains.mps.lang.feedback.context)" version="0" />
     <module reference="f486b8aa-5b2d-4ec0-8ef5-8f45d773fb84(jetbrains.mps.lang.typechecking.runtime)" version="0" />
     <module reference="bbf5c548-7111-4a53-a117-cdefc664cf34(jetbrains.mps.logic.reactor)" version="0" />
     <module reference="a5478664-6b44-4c62-a9f7-434f8aa57eee(jetbrains.mps.logic.runtime)" version="0" />
diff --git a/samples/lambdacalc/languages/samples.lambdacalc/samples.lambdacalc.mpl b/samples/lambdacalc/languages/samples.lambdacalc/samples.lambdacalc.mpl
index 745a4bc7..11a56c4a 100644
--- a/samples/lambdacalc/languages/samples.lambdacalc/samples.lambdacalc.mpl
+++ b/samples/lambdacalc/languages/samples.lambdacalc/samples.lambdacalc.mpl
@@ -35,6 +35,12 @@
     <language slang="l:fe9d76d7-5809-45c9-ae28-a40915b4d6ff:jetbrains.mps.lang.checkedName" version="1" />
     <language slang="l:c4803b19-6d89-4a3b-bf82-390769514add:jetbrains.mps.lang.coderules" version="15" />
     <language slang="l:3f4bc5f5-c6c1-4a28-8b10-c83066ffa4a1:jetbrains.mps.lang.constraints" version="5" />
+    <language slang="l:e51810c5-7308-4642-bcb6-469e61b5dd18:jetbrains.mps.lang.constraints.msgSpecification" version="0" />
+    <language slang="l:47257bf3-78d3-470b-89d9-8c3261a61d15:jetbrains.mps.lang.constraints.rules" version="0" />
+    <language slang="l:5dae8159-ab99-46bb-a40d-0cee30ee7018:jetbrains.mps.lang.constraints.rules.kinds" version="0" />
+    <language slang="l:134c38d4-e3af-4d9e-b069-1c7df0a4005d:jetbrains.mps.lang.constraints.rules.skeleton" version="0" />
+    <language slang="l:3ad5badc-1d9c-461c-b7b1-fa2fcd0a0ae7:jetbrains.mps.lang.context" version="0" />
+    <language slang="l:ea3159bf-f48e-4720-bde2-86dba75f0d34:jetbrains.mps.lang.context.defs" version="0" />
     <language slang="l:ceab5195-25ea-4f22-9b92-103b95ca8c0c:jetbrains.mps.lang.core" version="2" />
     <language slang="l:7fa12e9c-b949-4976-b4fa-19accbc320b4:jetbrains.mps.lang.dataFlow" version="1" />
     <language slang="l:f4ad079d-bc71-4ffb-9600-9328705cf998:jetbrains.mps.lang.descriptor" version="0" />
@@ -43,11 +49,13 @@
     <language slang="l:b401a680-8325-4110-8fd3-84331ff25bef:jetbrains.mps.lang.generator" version="3" />
     <language slang="l:d7706f63-9be2-479c-a3da-ae92af1e64d5:jetbrains.mps.lang.generator.generationContext" version="2" />
     <language slang="l:d7a92d38-f7db-40d0-8431-763b0c3c9f20:jetbrains.mps.lang.intentions" version="1" />
+    <language slang="l:ad93155d-79b2-4759-b10c-55123e763903:jetbrains.mps.lang.messages" version="0" />
     <language slang="l:446c26eb-2b7b-4bf0-9b35-f83fa582753e:jetbrains.mps.lang.modelapi" version="0" />
     <language slang="l:d4615e3b-d671-4ba9-af01-2b78369b0ba7:jetbrains.mps.lang.pattern" version="2" />
     <language slang="l:3a13115c-633c-4c5c-bbcc-75c4219e9555:jetbrains.mps.lang.quotation" version="3" />
     <language slang="l:3ecd7c84-cde3-45de-886c-135ecc69b742:jetbrains.mps.lang.refactoring" version="0" />
     <language slang="l:982eb8df-2c96-4bd7-9963-11712ea622e5:jetbrains.mps.lang.resources" version="2" />
+    <language slang="l:b3551702-269c-4f05-ba61-58060cef4292:jetbrains.mps.lang.rulesAndMessages" version="0" />
     <language slang="l:0eddeefa-c2d6-4437-bc2c-de50fd4ce470:jetbrains.mps.lang.script" version="1" />
     <language slang="l:13744753-c81f-424a-9c1b-cf8943bf4e86:jetbrains.mps.lang.sharedConcepts" version="0" />
     <language slang="l:7866978e-a0f0-4cc7-81bc-4d213d9375e1:jetbrains.mps.lang.smodel" version="17" />
@@ -74,6 +82,7 @@
     <module reference="ff6372a2-2f45-4ec3-952b-02581666015f(jetbrains.mps.lang.coderules.template)" version="0" />
     <module reference="ceab5195-25ea-4f22-9b92-103b95ca8c0c(jetbrains.mps.lang.core)" version="0" />
     <module reference="a9e4c532-c5f5-4bb7-99ef-42abb73bbb70(jetbrains.mps.lang.descriptor.aspects)" version="0" />
+    <module reference="9e98f4e2-decf-4e97-bf80-9109e8b759aa(jetbrains.mps.lang.feedback.context)" version="0" />
     <module reference="f486b8aa-5b2d-4ec0-8ef5-8f45d773fb84(jetbrains.mps.lang.typechecking.runtime)" version="0" />
     <module reference="bbf5c548-7111-4a53-a117-cdefc664cf34(jetbrains.mps.logic.reactor)" version="0" />
     <module reference="a5478664-6b44-4c62-a9f7-434f8aa57eee(jetbrains.mps.logic.runtime)" version="0" />
diff --git a/samples/lambdacalc/solutions/samples.lambdacalc.demo/samples.lambdacalc.demo.msd b/samples/lambdacalc/solutions/samples.lambdacalc.demo/samples.lambdacalc.demo.msd
index 20301771..968a0f8f 100644
--- a/samples/lambdacalc/solutions/samples.lambdacalc.demo/samples.lambdacalc.demo.msd
+++ b/samples/lambdacalc/solutions/samples.lambdacalc.demo/samples.lambdacalc.demo.msd
@@ -36,6 +36,7 @@
     <module reference="26e8f4ce-2a35-4f44-8065-e5ba154b18e9(jetbrains.mps.lang.coderules.runtime)" version="0" />
     <module reference="ff6372a2-2f45-4ec3-952b-02581666015f(jetbrains.mps.lang.coderules.template)" version="0" />
     <module reference="ceab5195-25ea-4f22-9b92-103b95ca8c0c(jetbrains.mps.lang.core)" version="0" />
+    <module reference="9e98f4e2-decf-4e97-bf80-9109e8b759aa(jetbrains.mps.lang.feedback.context)" version="0" />
     <module reference="f486b8aa-5b2d-4ec0-8ef5-8f45d773fb84(jetbrains.mps.lang.typechecking.runtime)" version="0" />
     <module reference="bbf5c548-7111-4a53-a117-cdefc664cf34(jetbrains.mps.logic.reactor)" version="0" />
     <module reference="a5478664-6b44-4c62-a9f7-434f8aa57eee(jetbrains.mps.logic.runtime)" version="0" />
diff --git a/samples/mpscore/languages/jetbrains.mps.baseLanguageExt/jetbrains.mps.baseLanguageExt.mpl b/samples/mpscore/languages/jetbrains.mps.baseLanguageExt/jetbrains.mps.baseLanguageExt.mpl
index 5aca8fa0..eac34590 100644
--- a/samples/mpscore/languages/jetbrains.mps.baseLanguageExt/jetbrains.mps.baseLanguageExt.mpl
+++ b/samples/mpscore/languages/jetbrains.mps.baseLanguageExt/jetbrains.mps.baseLanguageExt.mpl
@@ -30,14 +30,23 @@
     <language slang="l:af65afd8-f0dd-4942-87d9-63a55f2a9db1:jetbrains.mps.lang.behavior" version="2" />
     <language slang="l:c4803b19-6d89-4a3b-bf82-390769514add:jetbrains.mps.lang.coderules" version="15" />
     <language slang="l:3f4bc5f5-c6c1-4a28-8b10-c83066ffa4a1:jetbrains.mps.lang.constraints" version="5" />
+    <language slang="l:e51810c5-7308-4642-bcb6-469e61b5dd18:jetbrains.mps.lang.constraints.msgSpecification" version="0" />
+    <language slang="l:47257bf3-78d3-470b-89d9-8c3261a61d15:jetbrains.mps.lang.constraints.rules" version="0" />
+    <language slang="l:5dae8159-ab99-46bb-a40d-0cee30ee7018:jetbrains.mps.lang.constraints.rules.kinds" version="0" />
+    <language slang="l:134c38d4-e3af-4d9e-b069-1c7df0a4005d:jetbrains.mps.lang.constraints.rules.skeleton" version="0" />
+    <language slang="l:3ad5badc-1d9c-461c-b7b1-fa2fcd0a0ae7:jetbrains.mps.lang.context" version="0" />
+    <language slang="l:ea3159bf-f48e-4720-bde2-86dba75f0d34:jetbrains.mps.lang.context.defs" version="0" />
     <language slang="l:2e120f68-abfb-4980-bb1c-bc70159b1f95:jetbrains.mps.lang.controlflow" version="0" />
     <language slang="l:ceab5195-25ea-4f22-9b92-103b95ca8c0c:jetbrains.mps.lang.core" version="2" />
     <language slang="l:f4ad079d-bc71-4ffb-9600-9328705cf998:jetbrains.mps.lang.descriptor" version="0" />
     <language slang="l:18bc6592-03a6-4e29-a83a-7ff23bde13ba:jetbrains.mps.lang.editor" version="13" />
+    <language slang="l:ad93155d-79b2-4759-b10c-55123e763903:jetbrains.mps.lang.messages" version="0" />
     <language slang="l:446c26eb-2b7b-4bf0-9b35-f83fa582753e:jetbrains.mps.lang.modelapi" version="0" />
     <language slang="l:d4615e3b-d671-4ba9-af01-2b78369b0ba7:jetbrains.mps.lang.pattern" version="2" />
     <language slang="l:3a13115c-633c-4c5c-bbcc-75c4219e9555:jetbrains.mps.lang.quotation" version="3" />
     <language slang="l:982eb8df-2c96-4bd7-9963-11712ea622e5:jetbrains.mps.lang.resources" version="2" />
+    <language slang="l:b3551702-269c-4f05-ba61-58060cef4292:jetbrains.mps.lang.rulesAndMessages" version="0" />
+    <language slang="l:13744753-c81f-424a-9c1b-cf8943bf4e86:jetbrains.mps.lang.sharedConcepts" version="0" />
     <language slang="l:7866978e-a0f0-4cc7-81bc-4d213d9375e1:jetbrains.mps.lang.smodel" version="17" />
     <language slang="l:cba985fe-1e96-4f16-9f8d-b07434405d4f:jetbrains.mps.lang.smodel.types" version="0" />
     <language slang="l:c72da2b9-7cce-4447-8389-f407dc1158b7:jetbrains.mps.lang.structure" version="9" />
@@ -67,6 +76,7 @@
     <module reference="ff6372a2-2f45-4ec3-952b-02581666015f(jetbrains.mps.lang.coderules.template)" version="0" />
     <module reference="ceab5195-25ea-4f22-9b92-103b95ca8c0c(jetbrains.mps.lang.core)" version="0" />
     <module reference="a9e4c532-c5f5-4bb7-99ef-42abb73bbb70(jetbrains.mps.lang.descriptor.aspects)" version="0" />
+    <module reference="9e98f4e2-decf-4e97-bf80-9109e8b759aa(jetbrains.mps.lang.feedback.context)" version="0" />
     <module reference="446c26eb-2b7b-4bf0-9b35-f83fa582753e(jetbrains.mps.lang.modelapi)" version="0" />
     <module reference="7866978e-a0f0-4cc7-81bc-4d213d9375e1(jetbrains.mps.lang.smodel)" version="1" />
     <module reference="c72da2b9-7cce-4447-8389-f407dc1158b7(jetbrains.mps.lang.structure)" version="0" />
diff --git a/samples/mpscore/solutions/jetbrains.mps.baseLanguageExt.test/jetbrains.mps.baseLanguageExt.test.msd b/samples/mpscore/solutions/jetbrains.mps.baseLanguageExt.test/jetbrains.mps.baseLanguageExt.test.msd
index e6dba203..bb79fc70 100644
--- a/samples/mpscore/solutions/jetbrains.mps.baseLanguageExt.test/jetbrains.mps.baseLanguageExt.test.msd
+++ b/samples/mpscore/solutions/jetbrains.mps.baseLanguageExt.test/jetbrains.mps.baseLanguageExt.test.msd
@@ -41,6 +41,7 @@
     <module reference="df345b11-b8c7-4213-ac66-48d2a9b75d88(jetbrains.mps.baseLanguageInternal)" version="0" />
     <module reference="2d3c70e9-aab2-4870-8d8d-6036800e4103(jetbrains.mps.kernel)" version="0" />
     <module reference="ceab5195-25ea-4f22-9b92-103b95ca8c0c(jetbrains.mps.lang.core)" version="0" />
+    <module reference="9e98f4e2-decf-4e97-bf80-9109e8b759aa(jetbrains.mps.lang.feedback.context)" version="0" />
     <module reference="9ded098b-ad6a-4657-bfd9-48636cfe8bc3(jetbrains.mps.lang.traceable)" version="0" />
     <module reference="bbf5c548-7111-4a53-a117-cdefc664cf34(jetbrains.mps.logic.reactor)" version="0" />
     <module reference="a5478664-6b44-4c62-a9f7-434f8aa57eee(jetbrains.mps.logic.runtime)" version="0" />
diff --git a/samples/mpscore/solutions/typechecking.samples.baseLanguage/typechecking.samples.baseLanguage.msd b/samples/mpscore/solutions/typechecking.samples.baseLanguage/typechecking.samples.baseLanguage.msd
index 7a1fde2e..8429b889 100644
--- a/samples/mpscore/solutions/typechecking.samples.baseLanguage/typechecking.samples.baseLanguage.msd
+++ b/samples/mpscore/solutions/typechecking.samples.baseLanguage/typechecking.samples.baseLanguage.msd
@@ -51,6 +51,7 @@
     <module reference="26e8f4ce-2a35-4f44-8065-e5ba154b18e9(jetbrains.mps.lang.coderules.runtime)" version="0" />
     <module reference="ff6372a2-2f45-4ec3-952b-02581666015f(jetbrains.mps.lang.coderules.template)" version="0" />
     <module reference="ceab5195-25ea-4f22-9b92-103b95ca8c0c(jetbrains.mps.lang.core)" version="0" />
+    <module reference="9e98f4e2-decf-4e97-bf80-9109e8b759aa(jetbrains.mps.lang.feedback.context)" version="0" />
     <module reference="9ded098b-ad6a-4657-bfd9-48636cfe8bc3(jetbrains.mps.lang.traceable)" version="0" />
     <module reference="f486b8aa-5b2d-4ec0-8ef5-8f45d773fb84(jetbrains.mps.lang.typechecking.runtime)" version="0" />
     <module reference="bbf5c548-7111-4a53-a117-cdefc664cf34(jetbrains.mps.logic.reactor)" version="0" />