partway towards commands

I got very confused and started mucking about with "spawn" when in fact all I needed was the "inline" extension type in orcx that allows the interpreter to expose custom constants.

orchid-api-traits/Cargo.toml

@@ -6,6 +6,7 @@ edition = "2024"
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
+chrono = "0.4.43"
 futures = { version = "0.3.31", features = ["std"], default-features = false }
 itertools = "0.14.0"
 never = "0.1.0"

orchid-api-traits/src/coding.rs

@@ -7,6 +7,7 @@ use std::ops::{Range, RangeInclusive};
 use std::pin::Pin;
 use std::rc::Rc;
 use std::sync::Arc;
+use std::time::Duration;
 
 use futures::{AsyncRead, AsyncReadExt, AsyncWrite, AsyncWriteExt};
 use never::Never;
@@ -352,3 +353,26 @@ impl Encode for char {
 		(*self as u32).encode(write).await
 	}
 }
+
+impl Decode for Duration {
+	async fn decode<R: AsyncRead + ?Sized>(mut read: Pin<&mut R>) -> io::Result<Self> {
+		Ok(Self::new(u64::decode(read.as_mut()).await?, u32::decode(read).await?))
+	}
+}
+impl Encode for Duration {
+	async fn encode<W: AsyncWrite + ?Sized>(&self, mut write: Pin<&mut W>) -> io::Result<()> {
+		self.as_secs().encode(write.as_mut()).await?;
+		self.subsec_nanos().encode(write).await
+	}
+}
+impl Decode for chrono::TimeDelta {
+	async fn decode<R: AsyncRead + ?Sized>(mut read: Pin<&mut R>) -> io::Result<Self> {
+		Ok(Self::new(i64::decode(read.as_mut()).await?, u32::decode(read).await?).unwrap())
+	}
+}
+impl Encode for chrono::TimeDelta {
+	async fn encode<W: AsyncWrite + ?Sized>(&self, mut write: Pin<&mut W>) -> io::Result<()> {
+		self.num_seconds().encode(write.as_mut()).await?;
+		self.subsec_nanos().encode(write).await
+	}
+}

orchid-api-traits/src/hierarchy.rs

@@ -8,8 +8,8 @@ impl TLBool for TLTrue {}
 pub struct TLFalse;
 impl TLBool for TLFalse {}
 
-/// A type that implements [Hierarchy]. Used to select implementations of traits
-/// on the hierarchy
+/// A type that implements [Extends] or a root. Used to select implementations
+/// of traits on the hierarchy
 pub trait InHierarchy: Clone {
 	/// Indicates that this hierarchy element is a leaf. Leaves can never have
 	/// children