diff --git a/single_files/json.zig b/single_files/json.zig
new file mode 100644
index 0000000..f7c957c
--- /dev/null
+++ b/single_files/json.zig
@@ -0,0 +1,28 @@
+const std = @import("std");
+const json = std.json;
+const payload =
+    \\{
+    \\    "vals": {
+    \\        "testing": 1,
+    \\        "production": 42
+    \\    },
+    \\    "uptime": 9999
+    \\}
+;
+const Config = struct {
+    vals: struct { testing: u8, production: u8 },
+    uptime: u64,
+};
+const config = x: {
+    var stream = json.TokenStream.init(payload);
+    const res = json.parse(Config, &stream, .{});
+    // Assert no error can occur since we are
+    // parsing this JSON at comptime!
+    break :x res catch unreachable;
+};
+pub fn main() !void {
+    if (config.vals.production > 50) {
+        @compileError("only up to 50 supported");
+    }
+    std.log.info("up={d}", .{config.uptime});
+}