diff --git a/crates/wasi-c2/src/ctx.rs b/crates/wasi-c2/src/ctx.rs
index b9e74e3c18..5f60ccca9c 100644
--- a/crates/wasi-c2/src/ctx.rs
+++ b/crates/wasi-c2/src/ctx.rs
@@ -66,12 +66,12 @@ impl WasiCtxBuilder {
         Ok(self.0)
     }
 
-    pub fn arg(&mut self, arg: &str) -> Result<&mut Self, StringArrayError> {
+    pub fn arg(mut self, arg: &str) -> Result<Self, StringArrayError> {
         self.0.args.push(arg.to_owned())?;
         Ok(self)
     }
 
-    pub fn stdin(&mut self, f: Box<dyn WasiFile>) -> &mut Self {
+    pub fn stdin(mut self, f: Box<dyn WasiFile>) -> Self {
         self.0.insert_file(
             0,
             f,
@@ -80,7 +80,7 @@ impl WasiCtxBuilder {
         self
     }
 
-    pub fn stdout(&mut self, f: Box<dyn WasiFile>) -> &mut Self {
+    pub fn stdout(mut self, f: Box<dyn WasiFile>) -> Self {
         self.0.insert_file(
             1,
             f,
@@ -89,7 +89,7 @@ impl WasiCtxBuilder {
         self
     }
 
-    pub fn stderr(&mut self, f: Box<dyn WasiFile>) -> &mut Self {
+    pub fn stderr(mut self, f: Box<dyn WasiFile>) -> Self {
         self.0.insert_file(
             2,
             f,
@@ -98,17 +98,17 @@ impl WasiCtxBuilder {
         self
     }
 
-    pub fn inherit_stdio(&mut self) -> &mut Self {
+    pub fn inherit_stdio(self) -> Self {
         self.stdin(Box::new(crate::stdio::stdin()))
             .stdout(Box::new(crate::stdio::stdout()))
             .stderr(Box::new(crate::stdio::stderr()))
     }
 
     pub fn preopened_dir(
-        &mut self,
+        mut self,
         dir: Box<dyn WasiDir>,
         path: impl AsRef<Path>,
-    ) -> Result<&mut Self, Error> {
+    ) -> Result<Self, Error> {
         let caps = DirCaps::all();
         let file_caps = FileCaps::all();
         self.0.table().push(Box::new(DirEntry::new(
@@ -120,7 +120,7 @@ impl WasiCtxBuilder {
         Ok(self)
     }
 
-    pub fn random(&mut self, random: Box<dyn RngCore>) -> &mut Self {
+    pub fn random(mut self, random: Box<dyn RngCore>) -> Self {
         self.0.random.replace(random);
         self
     }
diff --git a/crates/wasi-c2/src/lib.rs b/crates/wasi-c2/src/lib.rs
index 71fb8a3122..7aa79d3d9e 100644
--- a/crates/wasi-c2/src/lib.rs
+++ b/crates/wasi-c2/src/lib.rs
@@ -13,8 +13,9 @@ mod string_array;
 pub mod table;
 pub mod virt;
 
-pub use ctx::WasiCtx;
-pub use dir::{DirCaps, WasiDir};
+pub use cap_fs_ext::SystemTimeSpec;
+pub use ctx::{WasiCtx, WasiCtxBuilder};
+pub use dir::{DirCaps, ReaddirCursor, ReaddirEntity, WasiDir};
 pub use error::Error;
-pub use file::{FileCaps, WasiFile};
+pub use file::{FdFlags, FileCaps, Filestat, OFlags, WasiFile};
 pub use string_array::StringArrayError;
diff --git a/crates/wasi-c2/src/table.rs b/crates/wasi-c2/src/table.rs
index 788f8cebfd..9cfbb3691b 100644
--- a/crates/wasi-c2/src/table.rs
+++ b/crates/wasi-c2/src/table.rs
@@ -12,7 +12,7 @@ impl Table {
     pub fn new() -> Self {
         Table {
             map: HashMap::new(),
-            next_key: 0,
+            next_key: 3, // 0, 1 and 2 are reserved for stdio
         }
     }
 
diff --git a/crates/wasi-c2/wasmtime/src/lib.rs b/crates/wasi-c2/wasmtime/src/lib.rs
index 02fdd558ec..d9df5e48ae 100644
--- a/crates/wasi-c2/wasmtime/src/lib.rs
+++ b/crates/wasi-c2/wasmtime/src/lib.rs
@@ -1,4 +1,7 @@
-pub use wasi_c2::WasiCtx;
+pub use wasi_c2::{
+    Error, FdFlags, FileCaps, Filestat, OFlags, ReaddirCursor, ReaddirEntity, SystemTimeSpec,
+    WasiCtx, WasiCtxBuilder, WasiDir, WasiFile,
+};
 
 // Defines a `struct Wasi` with member fields and appropriate APIs for dealing
 // with all the various WASI exports.