diff --git a/README.md b/README.md
new file mode 100644
index 0000000..fdeb39c
--- /dev/null
+++ b/README.md
@@ -0,0 +1,88 @@
+# Building my own castle
+
+I'm building my own castle in Zig ⚡.
+
+This is a collection of experimental, recreational or actually useful libraries,
+which I may or may not use as a part of some other projects. Most of them are
+work in progress and might remain so indefinitely.
+
+## cjit
+
+JIT compiler for the C language inspired by Fabrice Bellard's Tiny C Compiler
+(TCC). Meant to compile x86_64 and aarch64 for Windows and Linux straight to
+virtual memory, without the ability to output an executable file or library. C
+standard library is not fully supported, only some includes and builtins (see
+[src/includes](packages/cjit/src/includes)).
+
+It's in very early stage and cannot be used as of now. Currently, parts of the
+tokenizer, x86_64 emit code and relocation logic are implemented. Aarch64 would
+come after x86_64 is fully implemented and actually works.
+
+You can see an example of how this library is supposed to be used in
+[test/root.zig](packages/cjit/test/root.zig).
+
+## js
+
+Zig bindings for Fabrice Bellard's QuickJS. Original C sources are included and
+compiled with Zig's build system. The bindings are not complete, but usable.
+
+## media
+
+Set of utilities for decoding and encoding media files. As of now, no purely Zig
+decoder/encoder exists, which would be the goal. There is fairly comprehensive
+PNG chunk decoder, though.
+
+Bindings for stb_image.h from Sean T. Barrett's single-file C libraries are
+included. They can be used to decode PNG, JPEG and HDR images and support Zig's
+allocator interface in a thread-safe manner.
+
+This package is actually used by my other project, codenamed
+[voxel-game](/:root/renati/voxel-game).
+
+## myid
+
+Remnants of a project meant to provide a simpler alternative to OpenID Connect
+(OIDC). It contains an HTTP server, which has since been improved and resides
+in *web* package.
+
+The ideas behind *myid* were developed further in another project I created
+using TypeScript and Bun as a runtime. I might backport them back to Zig when I
+find the time and motivation, which would be implemented on top of the HTTP
+server from the *web* package.
+
+## vecmath
+
+Vector math library with support for vectors, matrices and ×8 SIMD operations
+(utilizing SOA layout).
+
+This package is actually used by my other project, codenamed
+[voxel-game](/:root/renati/voxel-game) and is probably the most complete package
+in this repository.
+
+## web
+
+An HTTP server library and collection of other utilities commonly associated
+with web technologies.
+
+The HTTP server implements HTTP version 1.1 using worker threads and supports
+SSL via OpenSSL library. The server is very low level and does not provide any
+logic to handle proper HTTP semantics. It is up to the user of the HTTP server
+library to respect (or not) all HTTP methods and headers. The server is designed
+or Linux only and uses Linux syscalls directly in its implementation.
+
+The other utilities include:
+
+- HTTP/1.1 request parser, which is part of the HTTP server, but can be used
+  independently,
+- OpenSSL bindings, which are used by the HTTP server, but can be used
+  independently (full mechanical C translation is provided and partial manual
+  Zig translation),
+- UUID type and generators for v4, v5 and v7,
+- Generic ID type, a wrapper around UUID (or anything that is 16 bytes long)
+  that can be instantiated for each distinct use of ID with a tag to help avoid
+  type confusion at compile time.
+
+## x11
+
+Zig bindings for Xlib (aka libX11), a C library implementing a client of the X
+Window System protocol. The bindings are not complete.
diff --git a/packages/js/src/root.zig b/packages/js/src/root.zig
index 73596bf..c10276a 100644
--- a/packages/js/src/root.zig
+++ b/packages/js/src/root.zig
@@ -195,7 +195,7 @@ const import = struct {
         no_add: bool = false,
         /// Internal use.
         no_exotic: bool = false,
-        _pad14: u18 = 0,
+        _pad18: u14 = 0,
     };
 
     pub const JS_EVAL = packed struct(u32) {
@@ -1168,7 +1168,7 @@ pub const Value = extern struct {
     }
 
     pub fn getClassId(self: Value) ClassId {
-        return .{ .class_id = import.JS_GetClassID(self) };
+        return .{ .class_id = import.JS_GetClassID(self.value) };
     }
 };
 
@@ -1182,7 +1182,7 @@ pub const ClassId = extern struct {
     pub const invalid: ClassId = .{ .class_id = 0 };
 
     pub fn new() ClassId {
-        var class_id: import.JSClassId = 0;
+        var class_id: import.JSClassID = 0;
         return .{ .class_id = import.JS_NewClassID(&class_id) };
     }
 };