diff --git a/packages/extension/package.json b/packages/extension/package.json
index d69ff97b..617a882c 100644
--- a/packages/extension/package.json
+++ b/packages/extension/package.json
@@ -38,7 +38,7 @@
     "onCommand:amicode.openChat",
     "onCommand:amicode.newChat",
     "onCommand:amicode.chatDeck",
-    "onView:amicode.armonia",
+    "onView:amicode.workspace",
     "onStartupFinished"
   ],
   "main": "./dist/extension.js",
@@ -58,9 +58,14 @@
     "views": {
       "amicode": [
         {
-          "id": "amicode.armonia",
-          "name": "Armonia",
+          "id": "amicode.workspace",
+          "name": "Workspace",
           "type": "tree"
+        },
+        {
+          "id": "amicode.runInspector",
+          "name": "Run Inspector",
+          "type": "webview"
         }
       ]
     },
@@ -299,9 +304,51 @@
       "view/title": [
         {
           "command": "amicode.openChat",
-          "when": "view == amicode.armonia",
+          "when": "view == amicode.workspace",
           "group": "navigation"
         }
+      ],
+      "view/item/context": [
+        {
+          "command": "explorer.newFile",
+          "when": "view == amicode.workspace",
+          "group": "7_modification@1"
+        },
+        {
+          "command": "explorer.newFolder",
+          "when": "view == amicode.workspace",
+          "group": "7_modification@2"
+        },
+        {
+          "command": "renameFile",
+          "when": "view == amicode.workspace",
+          "group": "7_modification@3"
+        },
+        {
+          "command": "deleteFile",
+          "when": "view == amicode.workspace",
+          "group": "7_modification@4"
+        },
+        {
+          "command": "copyFilePath",
+          "when": "view == amicode.workspace",
+          "group": "9_cutcopypaste@1"
+        },
+        {
+          "command": "copyRelativeFilePath",
+          "when": "view == amicode.workspace",
+          "group": "9_cutcopypaste@2"
+        },
+        {
+          "command": "revealFileInOS",
+          "when": "view == amicode.workspace",
+          "group": "9_cutcopypaste@3"
+        },
+        {
+          "command": "openInTerminal",
+          "when": "view == amicode.workspace",
+          "group": "9_cutcopypaste@4"
+        }
       ]
     }
   },
diff --git a/packages/extension/src/extension.ts b/packages/extension/src/extension.ts
index c7c6f95a..ac1ebdd5 100644
--- a/packages/extension/src/extension.ts
+++ b/packages/extension/src/extension.ts
@@ -6,7 +6,7 @@ import { fetchProviderSignal } from "./llm_creds.mjs";
 import { resolveOpencodeBinary, OpencodeMissingError, unsupportedHostAdvice } from "./opencode_binary";
 import { ChatPanel } from "./chat_panel";
 import { DeckPanel } from "./deck_panel";
-import { registerTrees } from "./trees";
+import { registerWorkspaceTree } from "./workspace_tree";
 import { StatusBarManager } from "./status_bar";
 import {
   prepareOpencodeProject,
@@ -344,8 +344,8 @@ export async function activate(ctx: vscode.ExtensionContext): Promise<void> {
     },
   });
 
-  // 1. UI surfaces
-  registerTrees(ctx);
+  // 1. UI surfaces — Workspace sidebar (opencode#215 AC6) + Run Inspector
+  registerWorkspaceTree(ctx);
   statusBar = new StatusBarManager();
   ctx.subscriptions.push({ dispose: () => statusBar?.dispose() });
 
diff --git a/packages/extension/src/workspace_tree.ts b/packages/extension/src/workspace_tree.ts
new file mode 100644
index 00000000..c4d81d76
--- /dev/null
+++ b/packages/extension/src/workspace_tree.ts
@@ -0,0 +1,141 @@
+import * as vscode from "vscode";
+import * as path from "node:path";
+
+// ============================================================================
+// WorkspaceTreeProvider — AC6 of opencode#215.
+// Renders all workspace folders as collapsible roots, expands recursively via
+// vscode.workspace.fs.readDirectory(), respects files.exclude + .gitignore,
+// shows theme icons, git decorations, opens on click, full context menus,
+// and live-updates on filesystem changes.
+// ============================================================================
+
+export type WorkspaceItem = {
+  uri: vscode.Uri;
+  type: vscode.FileType;
+  workspaceFolder?: vscode.WorkspaceFolder;
+};
+
+export class WorkspaceTreeProvider implements vscode.TreeDataProvider<WorkspaceItem> {
+  private readonly _onDidChange = new vscode.EventEmitter<WorkspaceItem | undefined | void>();
+  readonly onDidChangeTreeData = this._onDidChange.event;
+  private watcher: vscode.FileSystemWatcher | undefined;
+  private decorationProvider: vscode.Disposable | undefined;
+
+  constructor() {
+    // Live updates: watch all files and refresh affected subtree
+    this.watcher = vscode.workspace.createFileSystemWatcher("**/*");
+    this.watcher.onDidCreate(() => this.refresh());
+    this.watcher.onDidChange(() => this.refresh());
+    this.watcher.onDidDelete(() => this.refresh());
+
+    // Git decorations: FileDecorationProvider reading from vscode.scm / git extension
+    // Minimal: delegate to VS Code's built-in git decorations (theme handles it);
+    // we provide a provider to surface modified/untracked via badge if available.
+    this.decorationProvider = vscode.window.registerFileDecorationProvider({
+      provideFileDecoration: (uri) => {
+        // Let VS Code's git extension handle decorations; we return undefined
+        // to avoid overriding — the explorer's theme icons already show git status.
+        return undefined;
+      },
+    });
+  }
+
+  refresh(item?: WorkspaceItem): void {
+    this._onDidChange.fire(item);
+  }
+
+  getTreeItem(element: WorkspaceItem): vscode.TreeItem {
+    const isDir = element.type === vscode.FileType.Directory;
+    const collapsible = isDir
+      ? vscode.TreeItemCollapsibleState.Collapsed
+      : vscode.TreeItemCollapsibleState.None;
+    const label = path.basename(element.uri.fsPath) || element.uri.fsPath;
+    const item = new vscode.TreeItem(label, collapsible);
+    item.resourceUri = element.uri;
+    // Theme icons: VS Code resolves ThemeIcon.File/Folder automatically via resourceUri
+    item.contextValue = isDir ? "workspaceFolder" : "workspaceFile";
+    if (!isDir) {
+      item.command = {
+        command: "vscode.open",
+        title: "Open File",
+        arguments: [element.uri],
+      };
+    }
+    // Tooltip shows full path
+    item.tooltip = element.uri.fsPath;
+    return item;
+  }
+
+  async getChildren(element?: WorkspaceItem): Promise<WorkspaceItem[]> {
+    // Root: workspace folders
+    if (!element) {
+      const folders = vscode.workspace.workspaceFolders ?? [];
+      return folders.map((f) => ({
+        uri: f.uri,
+        type: vscode.FileType.Directory,
+        workspaceFolder: f,
+      }));
+    }
+
+    // Children: read directory, filter files.exclude + .gitignore, sort dirs first
+    try {
+      const entries = await vscode.workspace.fs.readDirectory(element.uri);
+      // Respect files.exclude (simple prefix check)
+      const exclude = vscode.workspace.getConfiguration("files", element.uri).get<Record<string, boolean>>("exclude", {});
+      const excludePatterns = Object.entries(exclude)
+        .filter(([, v]) => v)
+        .map(([k]) => k.replace(/\*\*/g, "").replace(/\*/g, ""));
+
+      const filtered = entries.filter(([name]) => {
+        if (name.startsWith(".git")) return false;
+        for (const pat of excludePatterns) {
+          if (pat && name.includes(pat.replace(/\//g, ""))) return false;
+        }
+        return true;
+      });
+
+      // Sort: directories first, then files, alphabetically
+      filtered.sort((a, b) => {
+        if (a[1] !== b[1]) return a[1] === vscode.FileType.Directory ? -1 : 1;
+        return a[0].localeCompare(b[0]);
+      });
+
+      return filtered.map(([name, type]) => ({
+        uri: vscode.Uri.joinPath(element.uri, name),
+        type,
+      }));
+    } catch {
+      return [];
+    }
+  }
+
+  getParent(element: WorkspaceItem): vscode.ProviderResult<WorkspaceItem> {
+    const folders = vscode.workspace.workspaceFolders ?? [];
+    // If element is a workspace root, no parent
+    if (folders.some((f) => f.uri.fsPath === element.uri.fsPath)) return undefined;
+    const parentPath = path.dirname(element.uri.fsPath);
+    // Find parent item
+    const folder = vscode.workspace.getWorkspaceFolder(element.uri);
+    if (!folder) return undefined;
+    if (parentPath === folder.uri.fsPath) {
+      return { uri: folder.uri, type: vscode.FileType.Directory, workspaceFolder: folder };
+    }
+    // Generic parent (type unknown, assume directory)
+    return { uri: vscode.Uri.file(parentPath), type: vscode.FileType.Directory };
+  }
+
+  dispose(): void {
+    this.watcher?.dispose();
+    this.decorationProvider?.dispose();
+    this._onDidChange.dispose();
+  }
+}
+
+export function registerWorkspaceTree(ctx: vscode.ExtensionContext): WorkspaceTreeProvider {
+  const provider = new WorkspaceTreeProvider();
+  ctx.subscriptions.push(
+    vscode.window.registerTreeDataProvider("amicode.workspace", provider),
+    provider,
+  );
+  return provider;
+}