Replace JSON with XML as primary doc source

CLAUDE.md

@@ -9,8 +9,8 @@ This file provides guidance to Claude Code (claude.ai/code) when working with co
 **gdoc** is a CLI documentation viewer for Godot API documentation, similar to `zigdoc`. It parses Godot's API documentation and displays it in the terminal with BBCode-to-Markdown conversion.
 
 Key behavior:
-- Uses the user's local `godot` executable if available
-- Falls back to downloading the latest API JSON from GitHub into cache if Godot is not installed
+- Requires `godot` executable to determine version and fetch XML class documentation
+- Downloads XML docs from GitHub, parses them, and builds a markdown cache
 - Converts BBCode documentation to Markdown using the `bbcodez` library for terminal display
 
 ## Build System
@@ -57,11 +57,14 @@ The build system imports `bbcodez` as a dependency and makes it available to the
 
 ### Expected Data Flow
 1. Parse CLI arguments for symbol lookup (e.g., `gdoc Node2D.position`)
-2. Locate Godot API JSON:
-   - Check for local `godot` executable → run `godot --dump-extension-api`
-   - If not found → download from GitHub to cache directory
-3. Parse JSON to find requested symbol documentation
-4. Convert BBCode documentation to Markdown using `bbcodez`
+2. Check if markdown cache is populated (xml_docs/.complete marker + Object/index.md sentinel)
+3. If cache is empty:
+   - Run `godot --version` to determine Godot version
+   - Download XML class docs tarball from GitHub
+   - Parse all XML files into DocDatabase via `loadFromXmlDir`
+   - Convert BBCode descriptions to Markdown
+   - Generate markdown cache files
+4. Read requested symbol's markdown from cache
 5. Display formatted output to terminal
 
 ### Integration with bbcodez

src/Config.zig

@@ -3,7 +3,6 @@ const known_folders = @import("known-folders");
 
 const Config = @This();
 
-no_xml: bool,
 cache_dir: []const u8,
 
 pub fn init(allocator: std.mem.Allocator) !Config {
@@ -18,7 +17,6 @@ pub fn init(allocator: std.mem.Allocator) !Config {
     };
 
     return .{
-        .no_xml = hasEnv("GDOC_NO_XML"),
         .cache_dir = cache_dir,
     };
 }
@@ -28,7 +26,6 @@ pub fn deinit(self: Config, allocator: std.mem.Allocator) void {
 }
 
 pub const testing: Config = .{
-    .no_xml = true,
     .cache_dir = "/tmp/gdoc-test-cache",
 };
 
@@ -45,6 +42,5 @@ test "init" {
 }
 
 test "testing config" {
-    try std.testing.expect(Config.testing.no_xml);
     try std.testing.expectEqualStrings("/tmp/gdoc-test-cache", Config.testing.cache_dir);
 }