diff --git a/package.json b/package.json
index 6c58d5e4..ba5d3d05 100644
--- a/package.json
+++ b/package.json
@@ -1310,7 +1310,14 @@
         "objectscript.serverSourceControl.disableOtherActionTriggers": {
           "description": "Prevent server-side source control 'other action' triggers from firing.",
           "type": "boolean",
-          "scope": "resource"
+          "scope": "resource",
+          "default": false
+        },
+        "objectscript.serverSourceControl.respectEditableStatus": {
+          "markdownDescription": "Set `isfs` document readonly if GetStatus method of server-side source control class returns Editable = 0.",
+          "type": "boolean",
+          "scope": "resource",
+          "default": false
         },
         "objectscript.export": {
           "type": "object",
@@ -1688,7 +1695,8 @@
               },
               "stopOnEntry": {
                 "type": "boolean",
-                "description": "Automatically stop target after attach. If not specified, target does not stop."
+                "description": "Automatically stop target after attach. If not specified, target does not stop.",
+                "default": false
               }
             }
           }
diff --git a/src/providers/FileSystemProvider/File.ts b/src/providers/FileSystemProvider/File.ts
index 801c02da..fd4776c5 100644
--- a/src/providers/FileSystemProvider/File.ts
+++ b/src/providers/FileSystemProvider/File.ts
@@ -5,6 +5,7 @@ export class File implements vscode.FileStat {
   public ctime: number;
   public mtime: number;
   public size: number;
+  public permissions?: vscode.FilePermission;
   public fileName: string;
   public name: string;
   public data?: Uint8Array;
diff --git a/src/providers/FileSystemProvider/FileSystemProvider.ts b/src/providers/FileSystemProvider/FileSystemProvider.ts
index 37454a2b..a9a8ed55 100644
--- a/src/providers/FileSystemProvider/FileSystemProvider.ts
+++ b/src/providers/FileSystemProvider/FileSystemProvider.ts
@@ -13,7 +13,14 @@ import {
   redirectDotvscodeRoot,
   workspaceFolderOfUri,
 } from "../../utils/index";
-import { config, FILESYSTEM_SCHEMA, intLangId, macLangId, workspaceState } from "../../extension";
+import {
+  config,
+  FILESYSTEM_READONLY_SCHEMA,
+  FILESYSTEM_SCHEMA,
+  intLangId,
+  macLangId,
+  workspaceState,
+} from "../../extension";
 import { addIsfsFileToProject, modifyProject } from "../../commands/project";
 import { DocumentContentProvider } from "../DocumentContentProvider";
 import { Document, UserAction } from "../../api/atelier";
@@ -184,13 +191,55 @@ export class FileSystemProvider implements vscode.FileSystemProvider {
     this._fireSoon({ type: vscode.FileChangeType.Changed, uri });
   }
 
-  public stat(uri: vscode.Uri): Promise<vscode.FileStat> {
+  public async stat(uri: vscode.Uri): Promise<vscode.FileStat> {
+    let entryPromise: Promise<Entry>;
+    let result: Entry;
     const redirectedUri = redirectDotvscodeRoot(uri);
     if (redirectedUri.path !== uri.path) {
       // When redirecting the /.vscode subtree we must fill in as-yet-unvisited folders to fix https://github.com/intersystems-community/vscode-objectscript/issues/1143
-      return this._lookup(redirectedUri, true);
+      entryPromise = this._lookup(redirectedUri, true);
+    } else {
+      entryPromise = this._lookup(uri);
+    }
+
+    // If this is our readonly variant there's no point checking server-side whether the file sould be marked readonly
+    if (uri.scheme === FILESYSTEM_READONLY_SCHEMA) {
+      return entryPromise;
+    }
+
+    if (entryPromise instanceof File) {
+      // previously resolved as a file
+      result = entryPromise;
+    } else if (entryPromise instanceof Promise && uri.path.split("/").pop()?.split(".").length > 1) {
+      // apparently a file, so resolve ahead of adding permissions
+      result = await entryPromise;
+    } else {
+      // otherwise return the promise
+      return entryPromise;
+    }
+
+    //
+    if (result instanceof File) {
+      const api = new AtelierAPI(uri);
+      const serverName = isCSPFile(uri) ? uri.path : uri.path.slice(1).replace(/\//g, ".");
+      if (serverName.slice(-4).toLowerCase() == ".cls") {
+        if (await isClassDeployed(serverName, api)) {
+          result.permissions |= vscode.FilePermission.Readonly;
+          return result;
+        }
+      }
+
+      // Does server-side source control report it as editable?
+      if (vscode.workspace.getConfiguration("objectscript.serverSourceControl", uri)?.get("respectEditableStatus")) {
+        const query = "select * from %Atelier_v1_Utils.Extension_GetStatus(?)";
+        const statusObj = await api.actionQuery(query, [serverName]);
+        const docStatus = statusObj.result?.content?.pop();
+        if (docStatus) {
+          result.permissions = docStatus.editable ? undefined : result.permissions | vscode.FilePermission.Readonly;
+        }
+      }
     }
-    return this._lookup(uri);
+    return result;
   }
 
   public async readDirectory(uri: vscode.Uri): Promise<[string, vscode.FileType][]> {