fix: remove image workspace folder mounting

Remove the obsolete source-folder command and all workspace mutation code. Keep automatic Explorer browsing backed by the image filesystem provider and verify the command is no longer registered.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

CHANGELOG.md

@@ -6,6 +6,8 @@ All notable changes to this project will be documented in this file.
 
 ### Changed
 
+- Remove the VS Code Add Source Folder to Workspace command; image files are
+  accessed exclusively through the automatic image-source Explorer view.
 - Show the image's editable virtual `source` filesystem automatically in the
   VS Code Explorer without adding a workspace folder.
 - Require an explicit `runa-cli` subcommand: `repl` starts the interactive

vscode/README.md

@@ -102,8 +102,10 @@ The image owns actor source text. On connect, **Runa Image Sources** automatical
 shows its virtual filesystem beneath `source` (`runa-image://<endpoint>/source`).
 No workspace changes, folder prompt, or extension restart is required.
 Opening a file reads it from the image; saving writes back to the image.
-The optional **Runa: Add Source Folder to Workspace** command is still available
-if a regular workspace mount is desired. Directories are derived from
+The extension never adds image folders to the workspace. VS Code's public API
+does not support overlaying virtual files onto the built-in workspace file tree,
+so image files appear in their own Explorer view backed by the filesystem provider.
+Directories are derived from
 source paths: `actors/counter` appears as `source/actors/counter.rn`. Source
 paths are canonical and exclude the `source/` prefix and `.rn` suffix.
 

vscode/integration/host.ts

@@ -8,6 +8,7 @@ export async function run(): Promise<void> {
   const folders = vscode.workspace.workspaceFolders?.map((folder) => folder.uri.toString());
   try {
     await vscode.commands.executeCommand("runa.connect", image.address);
+    assert.ok(!(await vscode.commands.getCommands(true)).includes("runa.addSourceFolder"));
     assert.deepEqual(
       vscode.workspace.workspaceFolders?.map((folder) => folder.uri.toString()),
       folders,

vscode/package.json

@@ -55,12 +55,6 @@
         "category": "Runa",
         "icon": "$(refresh)"
       },
-      {
-        "command": "runa.addSourceFolder",
-        "title": "Add Source Folder to Workspace",
-        "category": "Runa",
-        "enablement": "runa.connected"
-      },
       {
         "command": "runa.spawn",
         "title": "Spawn Actor",
@@ -210,10 +204,6 @@
           "when": "view == runa.actors && runa.connected",
           "group": "navigation"
         },
-        {
-          "command": "runa.addSourceFolder",
-          "when": "view == runa.actors && runa.connected"
-        },
         {
           "command": "runa.disconnect",
           "when": "view == runa.actors && runa.connected"

vscode/src/extension.ts

@@ -10,10 +10,8 @@ import {
   REVISION_SCHEME,
   SOURCE_SCHEME,
   sourceFileUri,
-  sourceFolderUri,
   sourcePathOf,
 } from "./sourceProvider";
-import { SOURCE_ROOT } from "./sources";
 
 let closeConnections: (() => Promise<void>) | undefined;
 
@@ -213,31 +211,6 @@ export function activate(context: vscode.ExtensionContext): { sourceTree: ImageS
       : "No actors. Spawn a .rn file from the source folder.";
   };
 
-  const addSourceFolder = async (target?: string): Promise<boolean> => {
-    const address = target ?? endpoint;
-    if (!address) throw new Error("Connect to a local image first");
-    const uri = sourceFolderUri(address);
-    const folders = vscode.workspace.workspaceFolders ?? [];
-    if (folders.some((folder) => folder.uri.toString() === uri.toString())) return true;
-    const previous = folders.findIndex((folder) => folder.uri.scheme === SOURCE_SCHEME);
-    const changed = new Promise<void>((resolve) => {
-      const subscription = vscode.workspace.onDidChangeWorkspaceFolders(() => {
-        subscription.dispose();
-        resolve();
-      });
-    });
-    const folder = { uri, name: SOURCE_ROOT };
-    // Replacing the first folder would restart extensions, so earlier images stay mounted there.
-    const updated =
-      previous > 0
-        ? vscode.workspace.updateWorkspaceFolders(previous, 1, folder)
-        : vscode.workspace.updateWorkspaceFolders(folders.length, 0, folder);
-    if (!updated) throw new Error("VS Code rejected adding the image source folder");
-    await changed;
-    output.appendLine(`Mounted ${uri.toString(true)} as workspace folder "${SOURCE_ROOT}"`);
-    return true;
-  };
-
   const connect = async (target?: string) => {
     const address =
       target ??
@@ -658,7 +631,6 @@ export function activate(context: vscode.ExtensionContext): { sourceTree: ImageS
     command("runa.connect", connect),
     command("runa.disconnect", disconnect),
     command("runa.refresh", refresh),
-    command("runa.addSourceFolder", () => addSourceFolder()),
     command("runa.inspect", inspect),
     command("runa.spawn", spawn),
     command("runa.spawnSource", spawnSource),