Codex introduction. Base process tidy.

.gitattributes

@@ -1,8 +1,39 @@
 ###############################################################################
-# Set default behavior to automatically normalize line endings.
+# Normalize text in the Git index, with explicit working-tree endings below.
 ###############################################################################
 * text=auto
 
+# Windows and .NET source, project, configuration, and documentation files.
+*.cs       text eol=crlf
+*.csproj   text eol=crlf
+*.sln      text eol=crlf
+*.props    text eol=crlf
+*.targets  text eol=crlf
+*.config   text eol=crlf
+*.json     text eol=crlf
+*.xml      text eol=crlf
+*.md       text eol=crlf
+*.txt      text eol=crlf
+*.ps1      text eol=crlf
+*.cmd      text eol=crlf
+*.bat      text eol=crlf
+
+# Web assets and files commonly consumed by Unix tooling.
+*.svg      text eol=lf
+*.html     text eol=lf
+*.css      text eol=lf
+*.js       text eol=lf
+*.sh       text eol=lf
+*.yml      text eol=lf
+*.yaml     text eol=lf
+
+# Binary assets.
+*.png      binary
+*.jpg      binary
+*.jpeg     binary
+*.gif      binary
+*.ico      binary
+
 ###############################################################################
 # Set default behavior for command prompt diff.
 #