diff --git a/README.md b/README.md
index ef81dc4..95bbb0b 100644
--- a/README.md
+++ b/README.md
@@ -121,5 +121,11 @@ Development Host](https://code.visualstudio.com/api/advanced-topics/extension-ho
 
 ---
 
+If you get an error about a `NODE_MODULE_VERSION` incompatibility or that a file is not a Windows executable,
+this is likely the error described above. Run `npm i -g electron-rebuild` if you have not done so and follow the
+directions above.
+
+---
+
 See the Visual Studio Code [getting started](https://code.visualstudio.com/api/get-started/your-first-extension)
 API page if you need more help.
diff --git a/src/accessNodeProvider.ts b/src/accessNodeProvider.ts
deleted file mode 100644
index 9b0db83..0000000
--- a/src/accessNodeProvider.ts
+++ /dev/null
@@ -1,47 +0,0 @@
-import * as vscode from 'vscode';
-
-// list of all actions
-let actions: AccessAction[] = [];
-
-class AccessAction extends vscode.TreeItem {
-  constructor(
-    public readonly label: string,
-    public readonly command: vscode.Command
-  ) {
-    super(label, vscode.TreeItemCollapsibleState.None);
-  }
-};
-
-export default class AccessNodeProvider implements vscode.TreeDataProvider<AccessAction> {
-  public getTreeItem(a: AccessAction): vscode.TreeItem {
-    return a;
-  }
-
-  public async getChildren(): Promise<AccessAction[]> {
-    if (actions.length === 0) {
-      // fetch and cache mind-reader options
-      let cmds: string[] = await vscode.commands.getCommands(true); // get non-builtin commands
-      cmds = cmds.filter(x => x.startsWith('mind-reader')); // filter mind-reader commands
-
-      cmds.forEach(c => {
-        let humanReadable = c.replace(/^mind-reader\./, ''); // strip extensions name
-
-        // Convert camelCaseText to Title Case Text
-        humanReadable = humanReadable.replace(/([A-Z])/g, ' $1');
-        humanReadable = humanReadable.charAt(0).toUpperCase() + humanReadable.slice(1);
-
-        // add item to actions
-        actions.push(new AccessAction(
-          humanReadable,
-          {
-            title: humanReadable,
-            command: c,
-            tooltip: humanReadable
-          }
-        ));
-      });
-    }
-
-    return Promise.resolve(actions);
-  }
-}
diff --git a/src/commands.ts b/src/commands.ts
deleted file mode 100644
index 2970d2a..0000000
--- a/src/commands.ts
+++ /dev/null
@@ -1,522 +0,0 @@
-import * as vscode from 'vscode';
-import * as pl from './pylex';
-import * as path from 'path';
-import * as fs from 'fs';
-
-import HubManager from './hubManager';
-
-/**
- * @type {Object} Command // Command to register with the VS Code Extension API
- * @prop {string} command // Name of the command; e.g., 'mind-reader.selectTheme'
- * @prop {callback} callback // Callback to register when `command` is invoked
- */
-export type CommandEntry = {
-  name: string,
-  callback: () => void
-};
-
-// Accessibility Commands
-export const accessCommands: CommandEntry[] = [
-  {
-    name: 'mind-reader.selectTheme',
-
-    // callbacks can be inlined...
-    callback: () => vscode.commands.executeCommand('workbench.action.selectTheme'),
-  },
-
-  {
-    name: 'mind-reader.increaseFontScale',
-    callback: increaseFontScale, // ...or factored out into separate functions below
-  },
-
-  {
-    name: 'mind-reader.decreaseFontScale',
-    callback: decreaseFontScale,
-  },
-
-  {
-    name: 'mind-reader.resetFontScale',
-    callback: resetFontScale,
-  },
-
-  {
-    name: 'mind-reader.increaseEditorScale',
-    callback: increaseEditorScale,
-  },
-
-  {
-    name: 'mind-reader.decreaseEditorScale',
-    callback: decreaseEditorScale,
-  },
-
-  {
-    name: 'mind-reader.resetEditorScale',
-    callback: resetEditorScale,
-  },
-
-  {
-    name: 'mind-reader.getIndent',
-    callback: getIndent,
-  },
-
-  {
-    name: 'mind-reader.runLineContext',
-    callback: runLineContext,
-  },
-
-  {
-    name: 'mind-reader.runCursorContext',
-    callback: runCursorContext
-  }
-];
-
-export const navCommands: CommandEntry[] = [
-  {
-    name: 'mind-reader.openWebview',
-    callback: openWebview,
-  },
-
-  {
-    name: 'mind-reader.openKeyBindWin',
-    callback: () => openKeyBindWin('Windows')
-  },
-  {
-    name: 'mind-reader.openKeyBindMac',
-    callback: () => openKeyBindWin('Mac'),
-  },
-
-  //Navigation Keys......
-  {
-    name: 'mind-reader.showAllSymbols',
-    callback: () => vscode.commands.executeCommand('workbench.action.showAllSymbols'),
-  },
-
-  {
-    name: 'mind-reader.gotoLine',
-    callback: () => vscode.commands.executeCommand('workbench.action.gotoLine'),
-  },
-
-  {
-    name: 'mind-reader.quickOpen',
-    callback: () => vscode.commands.executeCommand('workbench.action.quickOpen'),
-  },
-
-  {
-    name: 'mind-reader.gotoSymbol',
-    callback: () => vscode.commands.executeCommand('workbench.action.gotoSymbol'),
-  },
-
-  {
-    name: 'mind-reader.showProblems',
-    callback: () => vscode.commands.executeCommand('workbench.actions.view.problems'),
-  },
-
-  {
-    name: 'mind-reader.nextInFiles',
-    callback: () => vscode.commands.executeCommand('editor.action.marker.nextInFiles'),
-  },
-
-  {
-    name: 'mind-reader.prevInFiles',
-    callback: () => vscode.commands.executeCommand('editor.action.marker.prevInFiles'),
-  },
-
-  {
-    name: 'mind-reader.showCommands',
-    callback: () => vscode.commands.executeCommand('workbench.action.showCommands'),
-  },
-
-  {
-    name: 'mind-reader.quickOpenPreviousRecentlyUsedEditorInGroup',
-    callback: () => vscode.commands.executeCommand('workbench.action.quickOpenPreviousRecentlyUsedEditorInGroup'),
-  },
-
-  {
-    name: 'mind-reader.navigateBack',
-    callback: () => vscode.commands.executeCommand('workbench.action.navigateBack'),
-  },
-
-  {
-    name: 'mind-reader.getQuickInputBack',
-    callback: () => vscode.commands.executeCommand('workbench.action.quickInputBack'),
-  },
-
-  {
-    name: 'mind-reader.navigateForward',
-    callback: () => vscode.commands.executeCommand('workbench.action.navigateForward'),
-  },
-];
-
-export const hubCommands: CommandEntry[] = [
-  {
-    name: 'mind-reader.connectHub',
-    callback: connectHub
-  },
-
-  {
-    name: 'mind-reader.disconnectHub',
-    callback: disconnectHub
-  },
-
-  {
-    name: 'mind-reader.uploadCurrentFile',
-    callback: uploadCurrentFile
-  },
-
-  {
-    name: 'mind-reader.runProgram',
-    callback: runProgram
-  },
-
-  {
-    name: 'mind-reader.stopExecution',
-    callback: stopExecution
-  },
-
-  {
-    name: 'mind-reader.deleteProgram',
-    callback: deleteProgram
-  },
-];
-
-// COMMAND CALLBACK IMPLEMENTATIONS
-
-function increaseFontScale(): void {
-  vscode.commands.executeCommand('editor.action.fontZoomIn');
-}
-
-function decreaseFontScale(): void {
-  vscode.commands.executeCommand('editor.action.fontZoomOut');
-}
-
-function resetFontScale(): void {
-  vscode.commands.executeCommand('editor.action.fontZoomReset');
-}
-
-function increaseEditorScale(): void {
-  vscode.commands.executeCommand('workbench.action.zoomIn');
-}
-
-function decreaseEditorScale(): void {
-  vscode.commands.executeCommand('workbench.action.zoomOut');
-}
-
-function resetEditorScale(): void {
-  vscode.commands.executeCommand('workbench.action.zoomReset');
-}
-
-function openWebview(): void {
-  //vscode.commands.executeCommand('workbench.action.zoomOut');
-  const panel = vscode.window.createWebviewPanel(
-    'mindReader', // Identifies the type of the webview. Used internally
-    'Mind Reader', // Title of the panel displayed to the user
-    vscode.ViewColumn.One, // Editor column to show the new webview panel in.
-    {}
-  ); // Webview options. More on these later.
-
-  panel.webview.html = getWebviewContent('media/html/main.html');
-}
-
-function getWebviewContent(filepath: string) {
-  return fs.readFileSync(filepath, {encoding: 'utf-8'});
-}
-
-function openKeyBindWin(os: 'Mac' | 'Windows'): void {
-  //vscode.commands.executeCommand('workbench.action.zoomOut');
-  const panel = vscode.window.createWebviewPanel(
-    'mindReader', // Identifies the type of the webview. Used internally
-    'MR Key Bindings', // Title of the panel displayed to the user
-    vscode.ViewColumn.One, // Editor column to show the new webview panel in.
-    {}
-  ); // Webview options. More on these later.
-
-  if (os === 'Windows') {
-    panel.webview.html = getWebviewContent('media/html/winkeys.html');
-  } else if (os === 'Mac') {
-    panel.webview.html = getWebviewContent('media/html/mackeys.html');
-  }
-}
-
-function getIndent(): void {
-  let editor = vscode.window.activeTextEditor;
-  if(editor)
-  {
-    let lineNum = editor.selection.active.line + 1;
-    let textLine = editor.document.lineAt(lineNum - 1);
-    if(textLine.isEmptyOrWhitespace)
-    {
-      vscode.window.showInformationMessage("Line number " + lineNum.toString() + " Is Empty");
-    }
-    else
-    {
-      // Grab tab format from open document
-      let tabFmt = {
-        size: editor.options.tabSize as number,
-        hard: !editor.options.insertSpaces
-      };
-      let i = pl.Lexer.getIndent(textLine.text, tabFmt);
-      vscode.window.showInformationMessage("Line Number " + lineNum.toString() + " Indentation " + i.toString());
-    }
-  }
-  else{
-    vscode.window.showErrorMessage('No document currently active');
-  }
-
-}
-
-function runLineContext(): void {
-  let editor = vscode.window.activeTextEditor;
-  if (editor){
-    // current text and line number
-    let editorText = editor.document.getText();
-    let line = editor.selection.active.line;
-
-    // get tab info settings
-    let size = parseInt(editor.options.tabSize as string);
-    let hard = !editor.options.insertSpaces;
-
-    // initialize parser
-    let parser = new pl.Parser(editorText, {size, hard});
-    parser.parse();
-
-    let context = parser.context(line);
-
-    // build text
-    let contentString = createContextString(context, line);
-    vscode.window.showInformationMessage(contentString);
-  } else {
-    vscode.window.showErrorMessage('No document currently active');
-  }
-}
-
-function createContextString(context: pl.LexNode[], line: number): string {
-    if (context.length < 1) {
-      throw new Error('Cannot create context string for empty context');
-    }
-
-    let contextString = 'Line ' + (line+1); // 1 based
-    if (context[0].token && context[0].token.attr) {
-      contextString += ': ' + context[0].token.type.toString() + ' ' + context[0].token.attr.toString();
-    }
-    for (let i = 1; i < context.length; i++) {
-      let node = context[i];
-      if (node.label === 'root') {
-        // root
-        contextString += ' in the Document Root';
-        continue;
-      }
-
-      if (node.token!.type !== pl.PylexSymbol.EMPTY &&
-        node.token!.type !== pl.PylexSymbol.INDENT) {
-        contextString += ' inside ' + node.token!.type.toString();
-        if (node.token!.attr) {
-          contextString += ' ' + node.token!.attr.toString();
-        }
-      }
-    }
-    return contextString;
-}
-
-// find up to `n` words around the cursor, where `n` is
-// the value of `#mindReader.reader.contextWindow`
-function runCursorContext(): void {
-  let editor = vscode.window.activeTextEditor;
-  if (!editor) {
-    vscode.window.showErrorMessage('RunCursorContext: No Active Editor');
-    return;
-  }
-
-  const cursorPos: vscode.Position = editor.selection.active;
-  const text: string = editor.document.lineAt(cursorPos).text;
-  const windowSize: number = vscode.workspace.getConfiguration('mindReader').get('reader.contextWindow')!;
-
-  let trimmedText = text.trimStart(); // trim leading whitespace
-  let leadingWS = text.length - trimmedText.length; // # of characters of leading whitespace
-  trimmedText = trimmedText.trimEnd(); // trim trailing whitespace
-  let pos = leadingWS;
-  let maxPos = text.length;
-
-  // clamp cursor start/end to new range
-  let col = cursorPos.character; // effective column of the cursor position
-  if (col < leadingWS) {
-    // move effective start to first non-whitespace character in the line
-    col = leadingWS;
-  } else if (col > leadingWS + trimmedText.length - 1) {
-    // move effective end to last non-whitespace character in the line
-    col = leadingWS + trimmedText.length - 1;
-  }
-
-  // generate list of space separate words with range data (start, end)
-  // TODO: can find user position to be done in one pass
-  let spaceWords: {word: string, start: number, end: number}[] = [];
-  while (pos < maxPos && trimmedText.length > 0) {
-    let word = trimmedText.replace(/ .*/, '');
-    spaceWords.push({word, start: pos, end: pos+word.length});
-
-    // remove processed word from trimmed text
-    const oldText = trimmedText;
-    trimmedText = trimmedText.replace(/[^ ]+/, '').trimStart();
-
-    // update pos to start of next word
-    pos += oldText.length - trimmedText.length;
-  }
-
-  // find word the user is in
-  let contextStart: number = -1, contextEnd: number = -1;
-  for (let i = 0; i < spaceWords.length; i++) {
-    if (col >= spaceWords[i].start && col <= spaceWords[i].end) {
-      // found the word
-      contextStart = Math.max(0, i - windowSize); // clamp start index
-      contextEnd = Math.min(spaceWords.length, i + windowSize + 1); // clamp end index
-
-      // construct cursor context string
-      let contextString = '';
-      for (let i = contextStart; i < contextEnd; i++) {
-        contextString += spaceWords[i].word + ' ';
-      }
-
-      // output cursor context string
-      vscode.window.showInformationMessage(contextString);
-
-      return;
-    }
-  }
-}
-
-// Current connected hub
-let hub: HubManager | null = null;
-
-// TODO: port option
-async function connectHub(): Promise<void> {
-  if (hub && hub.isOpen()) {
-    vscode.window.showWarningMessage('LEGO Hub is already connected, reconnecting...');
-    disconnectHub();
-  }
-
-  try {
-      const ports = await HubManager.queryPorts();
-
-      if (ports.length === 0) {
-        vscode.window.showErrorMessage('No ports found. Is the LEGO Hub connected?');
-        return;
-      }
-
-      let portPath: string | undefined = vscode.workspace.getConfiguration('mindReader.connection').get('portPath');
-
-      if (!portPath) {
-        let slots: vscode.QuickPickItem[] = [];
-        for (const port of ports) {
-          slots.push({ label: port.path });
-        }
-
-        let picked = await vscode.window.showQuickPick(slots);
-
-        if (!picked) {
-          return;
-        }
-
-        portPath = picked.label;
-      }
-      hub = await HubManager.create(portPath);
-      vscode.window.showInformationMessage('LEGO Hub connected');
-  } catch (err) {
-    vscode.window.showErrorMessage('Could not connect to LEGO Hub');
-  }
-}
-
-async function disconnectHub(): Promise<void> {
-  if (!hub || !hub.isOpen()) {
-    vscode.window.showErrorMessage('LEGO Hub is not connected');
-    return;
-  }
-
-  await hub.close();
-  hub = null;
-  vscode.window.showInformationMessage('LEGO Hub disconnected');
-}
-
-async function uploadCurrentFile(): Promise<void> {
-  if (!hub || !hub.isOpen()) {
-    vscode.window.showErrorMessage('LEGO Hub is not connected!');
-    return;
-  }
-
-  if (!vscode.window.activeTextEditor) {
-    vscode.window.showErrorMessage('No active text editor');
-    return;
-  }
-
-  const currentFilePath = vscode.window.activeTextEditor.document.fileName;
-
-  if (currentFilePath) {
-    // construct quickpick
-    const slots: vscode.QuickPickItem[] = [];
-    for (let i = 0; i < 10; i++) {
-      slots.push({ label: i.toString() });
-    }
-    const slotID = await vscode.window.showQuickPick(slots, { canPickMany: false });
-
-    if (!slotID) {
-      return;
-    }
-
-    // TODO: progress bar?
-    vscode.window.showInformationMessage('Uploading current file');
-    await hub.uploadFile(currentFilePath, parseInt(slotID.label), path.basename(currentFilePath));
-    vscode.window.showInformationMessage(path.basename(currentFilePath) + ' uploaded to slot ' + slotID.label);
-  }
-}
-
-// TODO: find empty slots
-async function runProgram(): Promise<void> {
-  if (!hub || !hub.isOpen()) {
-    vscode.window.showErrorMessage('LEGO Hub is not connected!');
-    return;
-  }
-
-  const slots: vscode.QuickPickItem[] = [];
-  // construct quickpick
-  for (let i = 0; i < 10; i++) {
-    slots.push({ label: i.toString() });
-  }
-  const slotID = await vscode.window.showQuickPick(slots, { canPickMany: false });
-
-  if (!slotID) {
-    return;
-  }
-
-  vscode.window.showInformationMessage('Running program ' + slotID.label);
-  await hub.programExecute(parseInt(slotID.label));
-}
-
-async function stopExecution(): Promise<void> {
-  if (!hub || !hub.isOpen()) {
-    vscode.window.showErrorMessage('LEGO Hub is not connected!');
-    return;
-  }
-
-  await hub.programTerminate();
-  vscode.window.showInformationMessage('Execution stopped');
-}
-
-// TODO: find slots from status
-async function deleteProgram(): Promise<void> {
-  if (!hub || !hub.isOpen()) {
-    vscode.window.showErrorMessage('LEGO Hub is not connected!');
-    return;
-  }
-
-  const slots: vscode.QuickPickItem[] = [];
-  // construct quickpick
-  for (let i = 0; i < 10; i++) {
-    slots.push({ label: i.toString() });
-  }
-  const slotID = await vscode.window.showQuickPick(slots, { canPickMany: false });
-
-  if (!slotID) {
-    return;
-  }
-
-  await hub.deleteProgram(parseInt(slotID.label));
-  vscode.window.showInformationMessage('Deleted program ' + slotID.label);
-}
diff --git a/src/commands/access.ts b/src/commands/access.ts
new file mode 100755
index 0000000..8c05327
--- /dev/null
+++ b/src/commands/access.ts
@@ -0,0 +1,68 @@
+import * as vscode from 'vscode';
+import { CommandEntry } from './commandEntry';
+
+// Accessibility Commands
+export const accessCommands: CommandEntry[] = [
+  {
+    name: 'mind-reader.selectTheme',
+
+    // callbacks can be inlined...
+    callback: () => vscode.commands.executeCommand('workbench.action.selectTheme'),
+  },
+
+  {
+    name: 'mind-reader.increaseFontScale',
+    callback: increaseFontScale, // ...or factored out into separate functions below
+  },
+
+  {
+    name: 'mind-reader.decreaseFontScale',
+    callback: decreaseFontScale,
+  },
+
+  {
+    name: 'mind-reader.resetFontScale',
+    callback: resetFontScale,
+  },
+
+  {
+    name: 'mind-reader.increaseEditorScale',
+    callback: increaseEditorScale,
+  },
+
+  {
+    name: 'mind-reader.decreaseEditorScale',
+    callback: decreaseEditorScale,
+  },
+
+  {
+    name: 'mind-reader.resetEditorScale',
+    callback: resetEditorScale,
+  },
+];
+
+
+function increaseFontScale(): void {
+  vscode.commands.executeCommand('editor.action.fontZoomIn');
+}
+
+function decreaseFontScale(): void {
+  vscode.commands.executeCommand('editor.action.fontZoomOut');
+}
+
+function resetFontScale(): void {
+  vscode.commands.executeCommand('editor.action.fontZoomReset');
+}
+
+function increaseEditorScale(): void {
+  vscode.commands.executeCommand('workbench.action.zoomIn');
+}
+
+function decreaseEditorScale(): void {
+  vscode.commands.executeCommand('workbench.action.zoomOut');
+}
+
+function resetEditorScale(): void {
+  vscode.commands.executeCommand('workbench.action.zoomReset');
+}
+
diff --git a/src/commands/commandEntry.ts b/src/commands/commandEntry.ts
new file mode 100755
index 0000000..8461836
--- /dev/null
+++ b/src/commands/commandEntry.ts
@@ -0,0 +1,10 @@
+/**
+ * @type {Object} Command // Command to register with the VS Code Extension API
+ * @prop {string} command // Name of the command; e.g., 'mind-reader.selectTheme'
+ * @prop {callback} callback // Callback to register when `command` is invoked
+ */
+export type CommandEntry = {
+  name: string,
+  callback: () => void
+};
+
diff --git a/src/commands/hub.ts b/src/commands/hub.ts
new file mode 100755
index 0000000..1b8bd03
--- /dev/null
+++ b/src/commands/hub.ts
@@ -0,0 +1,174 @@
+import * as vscode from 'vscode';
+import * as path from 'path';
+import HubManager from '../hubManager';
+
+import { CommandEntry } from './commandEntry';
+
+export const hubCommands: CommandEntry[] = [
+  {
+    name: 'mind-reader.connectHub',
+    callback: connectHub
+  },
+
+  {
+    name: 'mind-reader.disconnectHub',
+    callback: disconnectHub
+  },
+
+  {
+    name: 'mind-reader.uploadCurrentFile',
+    callback: uploadCurrentFile
+  },
+
+  {
+    name: 'mind-reader.runProgram',
+    callback: runProgram
+  },
+
+  {
+    name: 'mind-reader.stopExecution',
+    callback: stopExecution
+  },
+
+  {
+    name: 'mind-reader.deleteProgram',
+    callback: deleteProgram
+  },
+];
+
+// Current connected hub
+let hub: HubManager | null = null;
+
+async function connectHub(): Promise<void> {
+  if (hub && hub.isOpen()) {
+    vscode.window.showWarningMessage('LEGO Hub is already connected, reconnecting...');
+    disconnectHub();
+  }
+
+  try {
+      const ports = await HubManager.queryPorts();
+
+      if (ports.length === 0) {
+        vscode.window.showErrorMessage('No ports found. Is the LEGO Hub connected?');
+        return;
+      }
+
+      let portPath: string | undefined = vscode.workspace.getConfiguration('mindReader.connection').get('portPath');
+
+      if (!portPath) {
+        let slots: vscode.QuickPickItem[] = [];
+        for (const port of ports) {
+          slots.push({ label: port.path });
+        }
+
+        let picked = await vscode.window.showQuickPick(slots);
+
+        if (!picked) {
+          return;
+        }
+
+        portPath = picked.label;
+      }
+      hub = await HubManager.create(portPath);
+      vscode.window.showInformationMessage('LEGO Hub connected');
+  } catch (err) {
+    vscode.window.showErrorMessage('Could not connect to LEGO Hub');
+  }
+}
+
+async function disconnectHub(): Promise<void> {
+  if (!hub || !hub.isOpen()) {
+    vscode.window.showErrorMessage('LEGO Hub is not connected');
+    return;
+  }
+
+  await hub.close();
+  hub = null;
+  vscode.window.showInformationMessage('LEGO Hub disconnected');
+}
+
+async function uploadCurrentFile(): Promise<void> {
+  if (!hub || !hub.isOpen()) {
+    vscode.window.showErrorMessage('LEGO Hub is not connected!');
+    return;
+  }
+
+  if (!vscode.window.activeTextEditor) {
+    vscode.window.showErrorMessage('No active text editor');
+    return;
+  }
+
+  const currentFilePath = vscode.window.activeTextEditor.document.fileName;
+
+  if (currentFilePath) {
+    // construct quickpick
+    const slots: vscode.QuickPickItem[] = [];
+    for (let i = 0; i < 10; i++) {
+      slots.push({ label: i.toString() });
+    }
+    const slotID = await vscode.window.showQuickPick(slots, { canPickMany: false });
+
+    if (!slotID) {
+      return;
+    }
+
+    // TODO: progress bar?
+    vscode.window.showInformationMessage('Uploading current file');
+    await hub.uploadFile(currentFilePath, parseInt(slotID.label), path.basename(currentFilePath));
+    vscode.window.showInformationMessage(path.basename(currentFilePath) + ' uploaded to slot ' + slotID.label);
+  }
+}
+
+// TODO: find empty slots
+async function runProgram(): Promise<void> {
+  if (!hub || !hub.isOpen()) {
+    vscode.window.showErrorMessage('LEGO Hub is not connected!');
+    return;
+  }
+
+  const slots: vscode.QuickPickItem[] = [];
+  // construct quickpick
+  for (let i = 0; i < 10; i++) {
+    slots.push({ label: i.toString() });
+  }
+  const slotID = await vscode.window.showQuickPick(slots, { canPickMany: false });
+
+  if (!slotID) {
+    return;
+  }
+
+  vscode.window.showInformationMessage('Running program ' + slotID.label);
+  await hub.programExecute(parseInt(slotID.label));
+}
+
+async function stopExecution(): Promise<void> {
+  if (!hub || !hub.isOpen()) {
+    vscode.window.showErrorMessage('LEGO Hub is not connected!');
+    return;
+  }
+
+  await hub.programTerminate();
+  vscode.window.showInformationMessage('Execution stopped');
+}
+
+// TODO: find slots from status
+async function deleteProgram(): Promise<void> {
+  if (!hub || !hub.isOpen()) {
+    vscode.window.showErrorMessage('LEGO Hub is not connected!');
+    return;
+  }
+
+  const slots: vscode.QuickPickItem[] = [];
+  // construct quickpick
+  for (let i = 0; i < 10; i++) {
+    slots.push({ label: i.toString() });
+  }
+  const slotID = await vscode.window.showQuickPick(slots, { canPickMany: false });
+
+  if (!slotID) {
+    return;
+  }
+
+  await hub.deleteProgram(parseInt(slotID.label));
+  vscode.window.showInformationMessage('Deleted program ' + slotID.label);
+}
diff --git a/src/commands/index.ts b/src/commands/index.ts
new file mode 100755
index 0000000..512519c
--- /dev/null
+++ b/src/commands/index.ts
@@ -0,0 +1,5 @@
+export{ CommandEntry } from './commandEntry';
+export{ accessCommands } from './access';
+export{ textCommands   } from './text';
+export{ hubCommands    } from './hub';
+export{ navCommands    } from './nav';
\ No newline at end of file
diff --git a/src/commands/nav.ts b/src/commands/nav.ts
new file mode 100755
index 0000000..f694e40
--- /dev/null
+++ b/src/commands/nav.ts
@@ -0,0 +1,116 @@
+import * as vscode from 'vscode';
+import * as fs from 'fs';
+
+import { CommandEntry } from './commandEntry';
+
+export const navCommands: CommandEntry[] = [
+  {
+    name: 'mind-reader.openWebview',
+    callback: openWebview,
+  },
+
+  {
+    name: 'mind-reader.openKeyBindWin',
+    callback: () => openKeyBindWin('Windows')
+  },
+  {
+    name: 'mind-reader.openKeyBindMac',
+    callback: () => openKeyBindWin('Mac'),
+  },
+
+  //Navigation Keys......
+  {
+    name: 'mind-reader.showAllSymbols',
+    callback: () => vscode.commands.executeCommand('workbench.action.showAllSymbols'),
+  },
+
+  {
+    name: 'mind-reader.gotoLine',
+    callback: () => vscode.commands.executeCommand('workbench.action.gotoLine'),
+  },
+
+  {
+    name: 'mind-reader.quickOpen',
+    callback: () => vscode.commands.executeCommand('workbench.action.quickOpen'),
+  },
+
+  {
+    name: 'mind-reader.gotoSymbol',
+    callback: () => vscode.commands.executeCommand('workbench.action.gotoSymbol'),
+  },
+
+  {
+    name: 'mind-reader.showProblems',
+    callback: () => vscode.commands.executeCommand('workbench.actions.view.problems'),
+  },
+
+  {
+    name: 'mind-reader.nextInFiles',
+    callback: () => vscode.commands.executeCommand('editor.action.marker.nextInFiles'),
+  },
+
+  {
+    name: 'mind-reader.prevInFiles',
+    callback: () => vscode.commands.executeCommand('editor.action.marker.prevInFiles'),
+  },
+
+  {
+    name: 'mind-reader.showCommands',
+    callback: () => vscode.commands.executeCommand('workbench.action.showCommands'),
+  },
+
+  {
+    name: 'mind-reader.quickOpenPreviousRecentlyUsedEditorInGroup',
+    callback: () => vscode.commands.executeCommand('workbench.action.quickOpenPreviousRecentlyUsedEditorInGroup'),
+  },
+
+  {
+    name: 'mind-reader.navigateBack',
+    callback: () => vscode.commands.executeCommand('workbench.action.navigateBack'),
+  },
+
+  {
+    name: 'mind-reader.getQuickInputBack',
+    callback: () => vscode.commands.executeCommand('workbench.action.quickInputBack'),
+  },
+
+  {
+    name: 'mind-reader.navigateForward',
+    callback: () => vscode.commands.executeCommand('workbench.action.navigateForward'),
+  },
+];
+
+// COMMAND CALLBACK IMPLEMENTATIONS
+function openWebview(): void {
+  //vscode.commands.executeCommand('workbench.action.zoomOut');
+  const panel = vscode.window.createWebviewPanel(
+    'mindReader', // Identifies the type of the webview. Used internally
+    'Mind Reader', // Title of the panel displayed to the user
+    vscode.ViewColumn.One, // Editor column to show the new webview panel in.
+    {}
+  ); // Webview options. More on these later.
+
+  panel.webview.html = getWebviewContent('media/html/main.html');
+}
+
+function getWebviewContent(filepath: string) {
+  return fs.readFileSync(filepath, {encoding: 'utf-8'});
+}
+
+function openKeyBindWin(os: 'Mac' | 'Windows'): void {
+  //vscode.commands.executeCommand('workbench.action.zoomOut');
+  const panel = vscode.window.createWebviewPanel(
+    'mindReader', // Identifies the type of the webview. Used internally
+    'MR Key Bindings', // Title of the panel displayed to the user
+    vscode.ViewColumn.One, // Editor column to show the new webview panel in.
+    {}
+  ); // Webview options. More on these later.
+
+  if (os === 'Windows') {
+    panel.webview.html = getWebviewContent('media/html/winkeys.html');
+  } else if (os === 'Mac') {
+    panel.webview.html = getWebviewContent('media/html/mackeys.html');
+  }
+}
+
+
diff --git a/src/commands/text.ts b/src/commands/text.ts
new file mode 100755
index 0000000..8e3beaf
--- /dev/null
+++ b/src/commands/text.ts
@@ -0,0 +1,168 @@
+import * as vscode from 'vscode';
+import * as pl from '../pylex';
+
+import { CommandEntry } from './commandEntry';
+
+export const textCommands: CommandEntry[] = [
+  {
+    name: 'mind-reader.getIndent',
+    callback: getIndent,
+  },
+
+  {
+    name: 'mind-reader.runLineContext',
+    callback: runLineContext,
+  },
+
+  {
+    name: 'mind-reader.runCursorContext',
+    callback: runCursorContext
+  }
+]
+
+function getIndent(): void {
+  let editor = vscode.window.activeTextEditor;
+  if(editor)
+  {
+    let lineNum = editor.selection.active.line + 1;
+    let textLine = editor.document.lineAt(lineNum - 1);
+    if(textLine.isEmptyOrWhitespace)
+    {
+      vscode.window.showInformationMessage("Line number " + lineNum.toString() + " Is Empty");
+    }
+    else
+    {
+      // Grab tab format from open document
+      let tabFmt = {
+        size: editor.options.tabSize as number,
+        hard: !editor.options.insertSpaces
+      };
+      let i = pl.Lexer.getIndent(textLine.text, tabFmt);
+      vscode.window.showInformationMessage("Line Number " + lineNum.toString() + " Indentation " + i.toString());
+    }
+  }
+  else{
+    vscode.window.showErrorMessage('No document currently active');
+  }
+
+}
+
+function runLineContext(): void {
+  let editor = vscode.window.activeTextEditor;
+  if (editor){
+    // current text and line number
+    let editorText = editor.document.getText();
+    let line = editor.selection.active.line;
+
+    // get tab info settings
+    let size = parseInt(editor.options.tabSize as string);
+    let hard = !editor.options.insertSpaces;
+
+    // initialize parser
+    let parser = new pl.Parser(editorText, {size, hard});
+    parser.parse();
+
+    let context = parser.context(line);
+
+    // build text
+    let contentString = createContextString(context, line);
+    vscode.window.showInformationMessage(contentString);
+  } else {
+    vscode.window.showErrorMessage('No document currently active');
+  }
+}
+
+function createContextString(context: pl.LexNode[], line: number): string {
+    if (context.length < 1) {
+      throw new Error('Cannot create context string for empty context');
+    }
+
+    let contextString = 'Line ' + (line+1); // 1 based
+    if (context[0].token && context[0].token.attr) {
+      contextString += ': ' + context[0].token.type.toString() + ' ' + context[0].token.attr.toString();
+    }
+    for (let i = 1; i < context.length; i++) {
+      let node = context[i];
+      if (node.label === 'root') {
+        // root
+        contextString += ' in the Document Root';
+        continue;
+      }
+
+      if (node.token!.type !== pl.PylexSymbol.EMPTY &&
+        node.token!.type !== pl.PylexSymbol.INDENT) {
+        contextString += ' inside ' + node.token!.type.toString();
+        if (node.token!.attr) {
+          contextString += ' ' + node.token!.attr.toString();
+        }
+      }
+    }
+    return contextString;
+}
+
+// find up to `n` words around the cursor, where `n` is
+// the value of `#mindReader.reader.contextWindow`
+function runCursorContext(): void {
+  let editor = vscode.window.activeTextEditor;
+  if (!editor) {
+    vscode.window.showErrorMessage('RunCursorContext: No Active Editor');
+    return;
+  }
+
+  const cursorPos: vscode.Position = editor.selection.active;
+  const text: string = editor.document.lineAt(cursorPos).text;
+  const windowSize: number = vscode.workspace.getConfiguration('mindReader').get('reader.contextWindow')!;
+
+  let trimmedText = text.trimStart(); // trim leading whitespace
+  let leadingWS = text.length - trimmedText.length; // # of characters of leading whitespace
+  trimmedText = trimmedText.trimEnd(); // trim trailing whitespace
+  let pos = leadingWS;
+  let maxPos = text.length;
+
+  // clamp cursor start/end to new range
+  let col = cursorPos.character; // effective column of the cursor position
+  if (col < leadingWS) {
+    // move effective start to first non-whitespace character in the line
+    col = leadingWS;
+  } else if (col > leadingWS + trimmedText.length - 1) {
+    // move effective end to last non-whitespace character in the line
+    col = leadingWS + trimmedText.length - 1;
+  }
+
+  // generate list of space separate words with range data (start, end)
+  // TODO: can find user position to be done in one pass
+  let spaceWords: {word: string, start: number, end: number}[] = [];
+  while (pos < maxPos && trimmedText.length > 0) {
+    let word = trimmedText.replace(/ .*/, '');
+    spaceWords.push({word, start: pos, end: pos+word.length});
+
+    // remove processed word from trimmed text
+    const oldText = trimmedText;
+    trimmedText = trimmedText.replace(/[^ ]+/, '').trimStart();
+
+    // update pos to start of next word
+    pos += oldText.length - trimmedText.length;
+  }
+
+  // find word the user is in
+  let contextStart: number = -1, contextEnd: number = -1;
+  for (let i = 0; i < spaceWords.length; i++) {
+    if (col >= spaceWords[i].start && col <= spaceWords[i].end) {
+      // found the word
+      contextStart = Math.max(0, i - windowSize); // clamp start index
+      contextEnd = Math.min(spaceWords.length, i + windowSize + 1); // clamp end index
+
+      // construct cursor context string
+      let contextString = '';
+      for (let i = contextStart; i < contextEnd; i++) {
+        contextString += spaceWords[i].word + ' ';
+      }
+
+      // output cursor context string
+      vscode.window.showInformationMessage(contextString);
+
+      return;
+    }
+  }
+}
+
diff --git a/src/extension.ts b/src/extension.ts
index ebcdb92..5496408 100644
--- a/src/extension.ts
+++ b/src/extension.ts
@@ -1,7 +1,12 @@
 import * as vscode from 'vscode';
 import * as pl from './pylex';
 
-import { accessCommands, hubCommands, navCommands } from './commands';
+import {
+  accessCommands,
+  hubCommands,
+  navCommands,
+  textCommands
+} from './commands';
 
 import CommandNodeProvider from './commandNodeProvider';
 import Logger from './log';
@@ -18,7 +23,12 @@ export function activate(context: vscode.ExtensionContext) {
 
   parser.parse('Beep Boop');
 
-  let allCommands = accessCommands.concat(hubCommands).concat(navCommands);
+  const allCommands = [
+    accessCommands,
+    hubCommands,
+    navCommands,
+    textCommands
+  ].flat(1);
 
   // Register Commands
   allCommands.forEach(command => {
@@ -29,7 +39,7 @@ export function activate(context: vscode.ExtensionContext) {
     context.subscriptions.push(disposable);
   });
 
-  let accessProvider = new CommandNodeProvider(accessCommands);
+  let accessProvider = new CommandNodeProvider([accessCommands, textCommands].flat(1));
   vscode.window.registerTreeDataProvider('accessActions', accessProvider);
 
   let hubProvider = new CommandNodeProvider(hubCommands);
diff --git a/src/hubManager.ts b/src/hubManager.ts
index 522f532..8d5bf7b 100644
--- a/src/hubManager.ts
+++ b/src/hubManager.ts
@@ -4,6 +4,21 @@ import * as fs from 'fs';
 
 import { logger } from './extension';
 
+/**
+ * Communication with the Hub takes place using a modified version of the JSON RPC 1.0 protocol:
+ * https://en.wikipedia.org/wiki/JSON-RPC
+ *
+ * It is mostly the same, except that the field names are abbreviated to the first letter. So,
+ *
+ * FIELD  -> ABBREVIATION
+ * ------ -> ----------
+ * method -> m
+ * params -> p
+ * id     -> i
+ * result -> r
+ * error  -> e
+ */
+
 /**
  * @type RPCRequest an RPC request message
  *
@@ -21,7 +36,7 @@ type RPCRequest = {
  * @type RPCResponse an RPC response message
  *
  * @prop {any?} `'r'` RPC response body
- * @prop {Object?} `'e'` RPC error body
+ * @prop {Object?} `'e'` RPC error body (base64 encoded)
  * @prop {string|null} `'i'` required response ID.
  */
 type RPCResponse = {