diff --git a/crates/dtmt/src/cmd/build.rs b/crates/dtmt/src/cmd/build.rs
index fab072b..74a627d 100644
--- a/crates/dtmt/src/cmd/build.rs
+++ b/crates/dtmt/src/cmd/build.rs
@@ -55,6 +55,7 @@ pub(crate) fn command_definition() -> Command {
         )
 }
 
+/// Try to find a `dtmt.cfg` in the given directory or traverse up the parents.
 #[tracing::instrument]
 async fn find_project_config(dir: Option<PathBuf>) -> Result<ModConfig> {
     let (path, mut file) = if let Some(path) = dir {
@@ -102,6 +103,8 @@ async fn find_project_config(dir: Option<PathBuf>) -> Result<ModConfig> {
     Ok(cfg)
 }
 
+/// Iterate over the paths in the given `Package` and
+/// compile each file by its file type.
 #[tracing::instrument(skip_all)]
 async fn compile_package_files(pkg: &Package, cfg: &ModConfig) -> Result<Vec<BundleFile>> {
     let root = Arc::new(&cfg.dir);
@@ -148,6 +151,8 @@ async fn compile_package_files(pkg: &Package, cfg: &ModConfig) -> Result<Vec<Bun
     results.into_iter().collect()
 }
 
+/// Read a `.package` file, collect the referenced files
+/// and compile all of them into a bundle.
 #[tracing::instrument]
 async fn build_package(
     cfg: &ModConfig,
@@ -176,6 +181,8 @@ async fn build_package(
     Ok(bundle)
 }
 
+/// Cleans the path of internal parent (`../`) or self (`./`) components,
+/// and ensures that it is relative.
 fn normalize_file_path<P: AsRef<Path>>(path: P) -> Result<PathBuf> {
     let path = path.as_ref();
 
diff --git a/crates/dtmt/src/cmd/bundle/list.rs b/crates/dtmt/src/cmd/bundle/list.rs
index dd72ad2..558126b 100644
--- a/crates/dtmt/src/cmd/bundle/list.rs
+++ b/crates/dtmt/src/cmd/bundle/list.rs
@@ -36,6 +36,18 @@ enum OutputFormat {
     Text,
 }
 
+fn format_byte_size(size: usize) -> String {
+    if size < 1024 {
+        format!("{} Bytes", size)
+    } else if size < 1024 * 1024 {
+        format!("{} kB", size / 1024)
+    } else if size < 1024 * 1024 * 1024 {
+        format!("{} MB", size / (1024 * 1024))
+    } else {
+        format!("{} GB", size / (1024 * 1024 * 1024))
+    }
+}
+
 #[tracing::instrument(skip(ctx))]
 async fn print_bundle_contents<P>(ctx: &sdk::Context, path: P, fmt: OutputFormat) -> Result<()>
 where
@@ -50,7 +62,11 @@ where
 
     match fmt {
         OutputFormat::Text => {
-            println!("Bundle: {}", bundle.name().display());
+            println!(
+                "Bundle: {} ({:016x})",
+                bundle.name().display(),
+                bundle.name()
+            );
 
             for f in bundle.files().iter() {
                 if f.variants().len() != 1 {
@@ -63,9 +79,10 @@ where
 
                 let v = &f.variants()[0];
                 println!(
-                    "\t{}.{}: {} bytes",
+                    "\t{}.{}: {} ({})",
                     f.base_name().display(),
                     f.file_type().ext_name(),
+                    format_byte_size(v.size()),
                     v.size()
                 );
             }
diff --git a/lib/dtmt-shared/src/log.rs b/lib/dtmt-shared/src/log.rs
index ab0b7b5..9c95c63 100644
--- a/lib/dtmt-shared/src/log.rs
+++ b/lib/dtmt-shared/src/log.rs
@@ -84,7 +84,7 @@ pub fn create_tracing_subscriber() {
         EnvFilter::try_from_default_env().unwrap_or_else(|_| EnvFilter::try_new("info").unwrap());
 
     let (dev_stdout_layer, prod_stdout_layer, filter_layer) = if cfg!(debug_assertions) {
-        let fmt_layer = fmt::layer().pretty();
+        let fmt_layer = fmt::layer().pretty().with_writer(std::io::stderr);
         (Some(fmt_layer), None, None)
     } else {
         // Creates a layer that
@@ -93,6 +93,7 @@ pub fn create_tracing_subscriber() {
         // - does not print spans/targets
         // - only prints time, not date
         let fmt_layer = fmt::layer()
+            .with_writer(std::io::stderr)
             .event_format(Formatter)
             .fmt_fields(debug_fn(format_fields));
 
diff --git a/lib/sdk/src/binary.rs b/lib/sdk/src/binary.rs
index 1fcc90e..9348e1b 100644
--- a/lib/sdk/src/binary.rs
+++ b/lib/sdk/src/binary.rs
@@ -43,6 +43,7 @@ impl<T: FromBinary> FromBinary for Vec<T> {
 }
 
 pub mod sync {
+    use std::ffi::CStr;
     use std::io::{self, Read, Seek, SeekFrom};
 
     use byteorder::{LittleEndian, ReadBytesExt, WriteBytesExt};
@@ -165,25 +166,13 @@ pub mod sync {
         }
 
         fn read_string_len(&mut self, len: usize) -> Result<String> {
-            let mut buf = vec![0; len];
-            let res = self
-                .read_exact(&mut buf)
-                .map_err(Report::new)
-                .and_then(|_| {
-                    String::from_utf8(buf).map_err(|err| {
-                        let ascii = String::from_utf8_lossy(err.as_bytes()).to_string();
-                        let bytes = format!("{:?}", err.as_bytes());
-                        Report::new(err)
-                            .with_section(move || bytes.header("Bytes:"))
-                            .with_section(move || ascii.header("ASCII:"))
-                    })
-                });
+            let pos = self.stream_position();
 
+            let res = read_string_len(self, len);
             if res.is_ok() {
                 return res;
             }
 
-            let pos = self.stream_position();
             if pos.is_ok() {
                 res.with_section(|| {
                     format!("{pos:#X} ({pos})", pos = pos.unwrap()).header("Position: ")
@@ -243,4 +232,22 @@ pub mod sync {
 
         Err(err).with_section(|| format!("{pos:#X} ({pos})").header("Position: "))
     }
+
+    fn read_string_len(mut r: impl Read, len: usize) -> Result<String> {
+        let mut buf = vec![0; len];
+        r.read_exact(&mut buf)
+            .wrap_err_with(|| format!("Failed to read {} bytes", len))?;
+
+        let res = match CStr::from_bytes_until_nul(&buf) {
+            Ok(s) => {
+                let s = s.to_str()?;
+                Ok(s.to_string())
+            }
+            Err(_) => String::from_utf8(buf.clone()).map_err(Report::new),
+        };
+
+        res.wrap_err("Invalid binary for UTF8 string")
+            .with_section(|| format!("{}", String::from_utf8_lossy(&buf)).header("ASCI:"))
+            .with_section(|| format!("{:x?}", buf).header("Bytes:"))
+    }
 }
diff --git a/lib/sdk/src/filetype/package.rs b/lib/sdk/src/filetype/package.rs
index 6394e42..758f79f 100644
--- a/lib/sdk/src/filetype/package.rs
+++ b/lib/sdk/src/filetype/package.rs
@@ -14,6 +14,15 @@ use crate::bundle::file::UserFile;
 use crate::bundle::filetype::BundleFileType;
 use crate::murmur::{HashGroup, IdString64, Murmur64};
 
+/// Resolves a relative path that might contain wildcards into a list of
+/// paths that exist on disk and match that wildcard.
+/// This is similar to globbing in Unix shells, but with much less features.
+///
+/// The only wilcard character allowed is `*`, and only at the end of the string,
+/// where it matches all files recursively in that directory.
+///
+/// `t` is an optional extension name, that may be used to force a wildcard
+/// path to only match that file type `t`.
 #[tracing::instrument]
 #[async_recursion]
 async fn resolve_wildcard<P1, P2>(
diff --git a/lib/sdk/src/murmur/dictionary.rs b/lib/sdk/src/murmur/dictionary.rs
index 2d51af1..267f0a4 100644
--- a/lib/sdk/src/murmur/dictionary.rs
+++ b/lib/sdk/src/murmur/dictionary.rs
@@ -147,14 +147,14 @@ impl Dictionary {
         Ok(())
     }
 
-    pub fn add(&mut self, value: String, group: HashGroup) {
-        let long = Murmur64::from(murmurhash64::hash(value.as_bytes(), SEED as u64));
-        let short = Murmur32::from(murmurhash64::hash32(value.as_bytes(), SEED));
+    pub fn add(&mut self, value: impl AsRef<[u8]>, group: HashGroup) {
+        let long = Murmur64::from(murmurhash64::hash(value.as_ref(), SEED as u64));
+        let short = Murmur32::from(murmurhash64::hash32(value.as_ref(), SEED));
 
         let entry = Entry {
             long,
             short,
-            value,
+            value: String::from_utf8_lossy(value.as_ref()).to_string(),
             group,
         };