fix: align codex mission resume and uppercase guide refs

bin/mosaic-ensure-sequential-thinking.ps1

@@ -1,10 +1,10 @@
 # mosaic-ensure-sequential-thinking.ps1
-$ErrorActionPreference = "Stop"
-
 param(
     [switch]$Check
 )
 
+$ErrorActionPreference = "Stop"
+
 $Pkg = "@modelcontextprotocol/server-sequential-thinking"
 
 function Require-Binary {
@@ -43,7 +43,7 @@ function Set-CodexConfig {
 
     $content = Get-Content $path -Raw
     $content = [regex]::Replace($content, "(?ms)^\[mcp_servers\.(sequential-thinking|sequential_thinking)\].*?(?=^\[|\z)", "")
-    $content = $content.TrimEnd() + "`n`n[mcp_servers.sequential-thinking]`ncommand = \"npx\"`nargs = [\"-y\", \"@modelcontextprotocol/server-sequential-thinking\"]`n"
+    $content = $content.TrimEnd() + "`n`n[mcp_servers.sequential-thinking]`ncommand = `"npx`"`nargs = [`"-y`", `"@modelcontextprotocol/server-sequential-thinking`"]`n"
     Set-Content -Path $path -Value $content -Encoding UTF8
 }