From dce63526e190ce5c54b5c63557b111a429b6842b Mon Sep 17 00:00:00 2001
From: Stefan Keim <indus@users.noreply.github.com>
Date: Wed, 17 Dec 2025 10:41:27 +0100
Subject: [PATCH 1/4] Update extension.ts

---
 src/extension.ts | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/extension.ts b/src/extension.ts
index 8a6b04b..c8d86cb 100644
--- a/src/extension.ts
+++ b/src/extension.ts
@@ -59,6 +59,7 @@ function registerNotebookController(context: vscode.ExtensionContext): void {
         'python',
         'mojo',
         "zig",
+        "powershell"
     ];
 
     controller.executeHandler = (

From a8ba577652806394a44a07ade2210ea19741aa09 Mon Sep 17 00:00:00 2001
From: Stefan Keim <indus@users.noreply.github.com>
Date: Wed, 17 Dec 2025 10:41:49 +0100
Subject: [PATCH 2/4] Update kernel.ts

---
 src/kernel.ts | 15 +++++++++++++--
 1 file changed, 13 insertions(+), 2 deletions(-)

diff --git a/src/kernel.ts b/src/kernel.ts
index 0ebdcde..54f18e3 100644
--- a/src/kernel.ts
+++ b/src/kernel.ts
@@ -17,6 +17,7 @@ import { processCellsTypescript } from './languages/typescript';
 import { ChildProcessWithoutNullStreams, spawnSync, spawn } from 'child_process';
 import { processShell as processShell } from './languages/shell';
 import { processCellsPython } from './languages/python';
+import { processPowerShell } from './languages/powershell';
 import * as vscode from 'vscode';
 import { homedir } from 'os';
 import { processCellsMojo } from './languages/mojo';
@@ -360,7 +361,16 @@ export class Kernel {
                 }
                 lastRunLanguage = 'shell';
                 const nuResult = processShell(currentCell, 'nushell');
-                return { stream: nuResult.stream, clearOutput: nuResult.clearOutput };
+                return { stream: nuResult.stream, clearOutput: nuResult.clearOutput }
+
+            case 'powershell':
+                if (commandNotOnPath('powershell', 'https://learn.microsoft.com/en-us/powershell/scripting/install/install-powershell')) {
+                    return null;
+                }
+                lastRunLanguage = 'powershell';
+                const psResult = processPowerShell(currentCell);
+                return { stream: psResult.stream, clearOutput: psResult.clearOutput };
+
 
             default:
                 return null;
@@ -483,7 +493,8 @@ export class Kernel {
             buf = Buffer.concat(arr);
             const outputs = decoder.decode(buf).split(/!!output-start-cell[\n,""," "]/g);
             const currentCellOutput =
-                lastRunLanguage === 'shell' ? outputs[1] : outputs[currentCellLang.index];
+            ['shell','powershell'].includes(lastRunLanguage)
+                 ? outputs[1] : outputs[currentCellLang.index];
 
             if (!clearOutput && currentCellOutput?.trim()) {
                 exec.replaceOutput([

From 8dfbce7daf823ad258fef735f7dc5ff473d71a29 Mon Sep 17 00:00:00 2001
From: Stefan Keim <indus@users.noreply.github.com>
Date: Wed, 17 Dec 2025 10:42:28 +0100
Subject: [PATCH 3/4] Create powershell.ts

---
 src/languages/powershell.ts | 35 +++++++++++++++++++++++++++++++++++
 1 file changed, 35 insertions(+)
 create mode 100644 src/languages/powershell.ts

diff --git a/src/languages/powershell.ts b/src/languages/powershell.ts
new file mode 100644
index 0000000..84e0005
--- /dev/null
+++ b/src/languages/powershell.ts
@@ -0,0 +1,35 @@
+import { ChildProcessWithoutNullStreams, spawn } from 'child_process';
+import { writeFileSync, mkdirSync } from 'fs';
+import path from 'path';
+import { NotebookCell } from 'vscode';
+import { getTempPath } from '../config';
+import { LanguageCommand } from '../types';
+
+const tempDir = getTempPath();
+
+export const processPowerShell = (
+    cell: NotebookCell
+): { stream: ChildProcessWithoutNullStreams; clearOutput: boolean } => {
+    const prog = process.platform === 'win32' ? 'powershell' : 'pwsh';
+
+    const contents = cell.document.getText(); // optionally escape quotes
+
+    const main = `
+Write-Host "!!output-start-cell"
+& {${contents}}
+`;
+
+    const filename = path.join(tempDir, 'main.ps1');
+    mkdirSync(tempDir, { recursive: true });
+    writeFileSync(filename, main);
+
+    let clearOutput = false;
+    if (cell.metadata?.command?.startsWith(LanguageCommand.clear)) {
+        clearOutput = true;
+    }
+
+    return {
+        stream: spawn(prog, ['-NoProfile', '-File', filename], { cwd: tempDir }),
+        clearOutput,
+    };
+};

From 2ed710de9b5edeb24204b92e5cba7b3a4a6e272e Mon Sep 17 00:00:00 2001
From: Stefan Keim <indus@users.noreply.github.com>
Date: Wed, 17 Dec 2025 10:43:02 +0100
Subject: [PATCH 4/4] Update markdownParser.ts

---
 src/markdownParser.ts | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/markdownParser.ts b/src/markdownParser.ts
index 8775aec..ef99e23 100644
--- a/src/markdownParser.ts
+++ b/src/markdownParser.ts
@@ -23,6 +23,7 @@ export const LANG_IDS = new Map([
     ['zsh', 'zsh'],
     ['openai', 'openai'],
     ['groq', 'groq'],
+    ['powershell', 'powershell'],
 ]);
 
 const LANG_ABBREVS = new Map(Array.from(LANG_IDS.keys()).map((k) => [LANG_IDS.get(k), k]));