Fix Bool index in Bool.roc

src/build/builtin_compiler/main.zig

@@ -46,14 +46,13 @@ pub fn main() !void {
     const set_roc_source = try std.fs.cwd().readFileAlloc(gpa, "src/build/roc/Set.roc", 1024 * 1024);
     defer gpa.free(set_roc_source);
 
-    // Compile Bool.roc without injecting Bool (it defines Bool itself)
-    // We still inject Result since Bool.roc might use it
+    // Compile Bool.roc without injecting anything (it's completely self-contained)
     const bool_env = try compileModule(
         gpa,
         "Bool",
         bool_roc_source,
         &.{}, // No module dependencies
-        .{ .inject_bool = false, .inject_result = true },
+        .{ .inject_bool = false, .inject_result = false },
     );
     defer {
         bool_env.deinit();

src/canonicalize/Can.zig

@@ -171,8 +171,14 @@ pub fn deinit(
     self.scratch_free_vars.deinit(gpa);
 }
 
+/// Options for initializing the canonicalizer.
+/// Controls which built-in types are injected into the module's scope.
 pub const InitOptions = struct {
+    /// Whether to inject the Bool type declaration (`Bool := [True, False]`).
+    /// Set to false when compiling Bool.roc itself to avoid duplication.
     inject_bool: bool = true,
+    /// Whether to inject the Result type declaration (`Result(ok, err) := [Ok(ok), Err(err)]`).
+    /// Set to false when compiling Result.roc itself (if it exists).
     inject_result: bool = true,
 };