diff --git a/Cargo.toml b/Cargo.toml
index cb49e32..fb5d99d 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -5,7 +5,7 @@ resolver = "3"
 [workspace.package]
 # TODO: idk how to do the name, fix later
 # name = "komp_ac"
-version = "0.8.27"
+version = "0.8.29"
 edition = "2024"
 license = "GPL-3.0-or-later"
 authors = ["Filip Priečinský <filippriec@gmail.com>"]
diff --git a/client b/client
index f3b1f0c..25de354 160000
--- a/client
+++ b/client
@@ -1 +1 @@
-Subproject commit f3b1f0c8026f96a90cfa08761d65601ed3026ddb
+Subproject commit 25de3543713170e4d847d8487d244feacd68c5cc
diff --git a/common/proto/table_definition.proto b/common/proto/table_definition.proto
index 2e72c74..dbb3551 100644
--- a/common/proto/table_definition.proto
+++ b/common/proto/table_definition.proto
@@ -246,6 +246,19 @@ message TableDetail {
   repeated ScriptInfo scripts = 4;
   string base_currency = 5;
   string row_display_column = 6;
+  map<string, ColumnBehavior> column_behaviors = 7;
+}
+
+// Server-owned behavior for one logical column returned in table details.
+message ColumnBehavior {
+  // True when the server created the column as a companion of another column.
+  bool generated = 1;
+
+  // True when clients must display but never submit edits for the column.
+  bool read_only = 2;
+
+  // Logical source column name, empty for ordinary user-defined columns.
+  string generated_from = 3;
 }
 
 // A script that targets a specific column in a table.
diff --git a/common/proto/table_structure.proto b/common/proto/table_structure.proto
index d4a4d84..8def2fc 100644
--- a/common/proto/table_structure.proto
+++ b/common/proto/table_structure.proto
@@ -75,4 +75,13 @@ message TableColumn {
   // True for a user-defined column whose logic should be recomputed whenever
   // one of its dependencies changes. False for system and foreign-key columns.
   bool recompute_on_dependency_change = 5;
+
+  // True when the server created this as a companion of another logical column.
+  bool generated = 6;
+
+  // True when clients must not submit edits for this column.
+  bool read_only = 7;
+
+  // Logical source column name, empty for ordinary and system columns.
+  string generated_from = 8;
 }
diff --git a/common/src/proto/descriptor.bin b/common/src/proto/descriptor.bin
index a641411..d379a7f 100644
Binary files a/common/src/proto/descriptor.bin and b/common/src/proto/descriptor.bin differ
diff --git a/common/src/proto/komp_ac.table_definition.rs b/common/src/proto/komp_ac.table_definition.rs
index d1b8082..eeab0a0 100644
--- a/common/src/proto/komp_ac.table_definition.rs
+++ b/common/src/proto/komp_ac.table_definition.rs
@@ -247,6 +247,24 @@ pub struct TableDetail {
     pub base_currency: ::prost::alloc::string::String,
     #[prost(string, tag = "6")]
     pub row_display_column: ::prost::alloc::string::String,
+    #[prost(map = "string, message", tag = "7")]
+    pub column_behaviors: ::std::collections::HashMap<
+        ::prost::alloc::string::String,
+        ColumnBehavior,
+    >,
+}
+/// Server-owned behavior for one logical column returned in table details.
+#[derive(Clone, PartialEq, Eq, Hash, ::prost::Message)]
+pub struct ColumnBehavior {
+    /// True when the server created the column as a companion of another column.
+    #[prost(bool, tag = "1")]
+    pub generated: bool,
+    /// True when clients must display but never submit edits for the column.
+    #[prost(bool, tag = "2")]
+    pub read_only: bool,
+    /// Logical source column name, empty for ordinary user-defined columns.
+    #[prost(string, tag = "3")]
+    pub generated_from: ::prost::alloc::string::String,
 }
 /// A script that targets a specific column in a table.
 #[derive(Clone, PartialEq, Eq, Hash, ::prost::Message)]
diff --git a/common/src/proto/komp_ac.table_structure.rs b/common/src/proto/komp_ac.table_structure.rs
index 41cdcbb..17af7c3 100644
--- a/common/src/proto/komp_ac.table_structure.rs
+++ b/common/src/proto/komp_ac.table_structure.rs
@@ -58,6 +58,15 @@ pub struct TableColumn {
     /// one of its dependencies changes. False for system and foreign-key columns.
     #[prost(bool, tag = "5")]
     pub recompute_on_dependency_change: bool,
+    /// True when the server created this as a companion of another logical column.
+    #[prost(bool, tag = "6")]
+    pub generated: bool,
+    /// True when clients must not submit edits for this column.
+    #[prost(bool, tag = "7")]
+    pub read_only: bool,
+    /// Logical source column name, empty for ordinary and system columns.
+    #[prost(string, tag = "8")]
+    pub generated_from: ::prost::alloc::string::String,
 }
 /// Generated client implementations.
 pub mod table_structure_service_client {
diff --git a/server b/server
index f6ab9e9..8158629 160000
--- a/server
+++ b/server
@@ -1 +1 @@
-Subproject commit f6ab9e951d3548ac349ddc28a0ed1d94c686db3c
+Subproject commit 81586299e5babc1e8005ae0478c10c056700dc2b