From 44958ef82e74fc02468ec2a3e494da0a877a60e6 Mon Sep 17 00:00:00 2001
From: "copilot-swe-agent[bot]" <198982749+Copilot@users.noreply.github.com>
Date: Wed, 3 Jun 2026 19:05:06 +0000
Subject: [PATCH 1/3] Initial plan


From 1b188135e9fc819726a449737c2575121d7334ee Mon Sep 17 00:00:00 2001
From: "copilot-swe-agent[bot]" <198982749+Copilot@users.noreply.github.com>
Date: Wed, 3 Jun 2026 19:22:47 +0000
Subject: [PATCH 2/3] Surface stderr in run command directive

---
 .../run-code-blocks/directives/command.ts     | 32 ++++++++++++++++---
 1 file changed, 27 insertions(+), 5 deletions(-)

diff --git a/src/lib/plugins/run-code-blocks/directives/command.ts b/src/lib/plugins/run-code-blocks/directives/command.ts
index 21f7db36..e64124fa 100644
--- a/src/lib/plugins/run-code-blocks/directives/command.ts
+++ b/src/lib/plugins/run-code-blocks/directives/command.ts
@@ -52,13 +52,35 @@ export default async function command(node: Code, options: Options): Promise<Opt
       output.push(`$ ${display}`);
     }
 
-    let { stdout } = await exec(cmd, { cwd });
+    try {
+      let { stdout, stderr } = await exec(cmd, { cwd });
 
-    if (args.captureOutput) {
-      output.push(stdout);
-    }
+      if (args.captureOutput) {
+        if (stdout) {
+          output.push(stdout);
+        }
+
+        if (stderr) {
+          output.push(stderr);
+        }
+      }
+
+      console.log(stdout);
+    } catch (error) {
+      if (args.captureOutput && typeof error === 'object' && error) {
+        let { stdout, stderr } = error as { stdout?: string, stderr?: string };
 
-    console.log(stdout)
+        if (stdout) {
+          output.push(stdout);
+        }
+
+        if (stderr) {
+          output.push(stderr);
+        }
+      }
+
+      throw error;
+    }
   }
 
   if (args.hidden) {

From 67825e757bf6534fdcb0d2285a72c5ec3908085e Mon Sep 17 00:00:00 2001
From: "copilot-swe-agent[bot]" <198982749+Copilot@users.noreply.github.com>
Date: Wed, 3 Jun 2026 19:25:33 +0000
Subject: [PATCH 3/3] Handle run command stderr output and exec failures

---
 .../run-code-blocks/directives/command.ts        | 16 ++++++++++++++--
 1 file changed, 14 insertions(+), 2 deletions(-)

diff --git a/src/lib/plugins/run-code-blocks/directives/command.ts b/src/lib/plugins/run-code-blocks/directives/command.ts
index e64124fa..7d9fb090 100644
--- a/src/lib/plugins/run-code-blocks/directives/command.ts
+++ b/src/lib/plugins/run-code-blocks/directives/command.ts
@@ -17,6 +17,15 @@ interface Args {
   captureOutput?: boolean;
 }
 
+interface CommandError {
+  stdout?: string;
+  stderr?: string;
+}
+
+function isCommandError(error: unknown): error is CommandError {
+  return typeof error === 'object' && error !== null && ('stdout' in error || 'stderr' in error);
+}
+
 export default async function command(node: Code, options: Options): Promise<Option<Code>> {
   let args = parseArgs<Args>(node, [
     optional('lang', String, 'shell'),
@@ -66,9 +75,12 @@ export default async function command(node: Code, options: Options): Promise<Opt
       }
 
       console.log(stdout);
+      if (stderr) {
+        console.error(stderr);
+      }
     } catch (error) {
-      if (args.captureOutput && typeof error === 'object' && error) {
-        let { stdout, stderr } = error as { stdout?: string, stderr?: string };
+      if (args.captureOutput && isCommandError(error)) {
+        let { stdout, stderr } = error;
 
         if (stdout) {
           output.push(stdout);