From 1c4b6a711836fdadf439dc0b5cd838f573fea9cf Mon Sep 17 00:00:00 2001
From: Le Vivilet <levivilet@pm.me>
Date: Wed, 14 Oct 2026 19:30:38 +0000
Subject: [PATCH] fix: register devcontainer output channel during activation

---
 .../extension/src/parts/Progress/Progress.ts  |  5 ++--
 .../test/DevContainerProgress.test.ts         | 24 ++++++++++++-------
 2 files changed, 19 insertions(+), 10 deletions(-)

diff --git a/packages/extension/src/parts/Progress/Progress.ts b/packages/extension/src/parts/Progress/Progress.ts
index 81f70f9..950d0eb 100644
--- a/packages/extension/src/parts/Progress/Progress.ts
+++ b/packages/extension/src/parts/Progress/Progress.ts
@@ -11,7 +11,9 @@ import {
 } from '@lvce-editor/api'
 import * as Rpc from '../Rpc/Rpc.ts'
 
-let output: ReturnType<typeof createOutputChannel> | undefined
+// Register the channel during extension activation so it is available in the
+// Output dropdown before the first container operation starts.
+const output = createOutputChannel('dev-containers')
 let busy = false
 let monitorGeneration = 0
 const workspaceProgressState: {
@@ -73,7 +75,6 @@ export const run = async (
   busy = true
   const generation = ++monitorGeneration
   try {
-    output ||= createOutputChannel('dev-containers')
     const channel = output
     const header = `Starting Dev Containers for ${workspaceFolder}…\n`
     await channel.replace(header)
diff --git a/packages/extension/test/DevContainerProgress.test.ts b/packages/extension/test/DevContainerProgress.test.ts
index ac27e16..5a6f40c 100644
--- a/packages/extension/test/DevContainerProgress.test.ts
+++ b/packages/extension/test/DevContainerProgress.test.ts
@@ -2,6 +2,7 @@ import assert from 'node:assert/strict'
 import { mock, test } from 'node:test'
 
 const events: string[] = []
+const createdOutputChannels: string[] = []
 const pending = Promise.withResolvers<unknown>()
 let startupResult: unknown = pending.promise
 let workspaceProgressProvider:
@@ -14,14 +15,17 @@ let lifecycle = {
 mock.module('@lvce-editor/api', {
   namedExports: {
     closeUri: async () => {},
-    createOutputChannel: () => ({
-      appendLine: async (text: string) => {
-        events.push(text)
-      },
-      replace: async (text: string) => {
-        events.push(text)
-      },
-    }),
+    createOutputChannel: (id: string) => {
+      createdOutputChannels.push(id)
+      return {
+        appendLine: async (text: string) => {
+          events.push(text)
+        },
+        replace: async (text: string) => {
+          events.push(text)
+        },
+      }
+    },
     executeCommand: async () => {},
     getPreference: async () => 'docker',
     openOutputView: async () => {
@@ -56,6 +60,10 @@ const { openWorkspace } =
   await import('../src/parts/DevContainerCommands/DevContainerCommands.ts')
 const Progress = await import('../src/parts/Progress/Progress.ts')
 
+await test('registers the output channel as soon as the extension activates', () => {
+  assert.deepEqual(createdOutputChannels, ['dev-containers'])
+})
+
 await test('reopen opens output and displays logs before the build finishes', async () => {
   Progress.registerWorkspaceProgress()
   const operation = openWorkspace()