Add dev branch CI, fix golint const comment

.github/workflows/automerge.yml

@@ -0,0 +1,20 @@
+name: Auto-merge dev→main
+
+on:
+  pull_request:
+    types: [opened, reopened, synchronize]
+    branches: [main]
+
+jobs:
+  enable-auto-merge:
+    runs-on: ubuntu-latest
+    if: github.head_ref == 'dev'
+    permissions:
+      pull-requests: write
+      contents: write
+    steps:
+      - name: Enable auto-merge
+        run: gh pr merge --auto --merge "${{ github.event.pull_request.number }}"
+        env:
+          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          GH_REPO: ${{ github.repository }}

.github/workflows/test.yml

@@ -2,9 +2,9 @@ name: Go
 
 on:
   push:
-    branches: [ "main"]
+    branches: [ "main", "dev" ]
   pull_request:
-    branches: [ "main"]
+    branches: [ "main" ]
 
 jobs:
   test:

.gitignore

@@ -0,0 +1 @@
+ROADMAP.md

appconfig.go

@@ -12,6 +12,7 @@ import (
 // AppName identifies a supported application for WriteAppConfig.
 type AppName string
 
+// Supported application names for WriteAppConfig and ClearAppConfig.
 const (
 	AppCurl AppName = "curl" // ~/.curlrc
 	AppGit  AppName = "git"  // git config --global