Remove the old leaf declaration path

Delete the deprecated Leaf derive path, migrate the remaining tests and example to leaf!, and add direct coverage for endpoint-only, TUI-only, and shared-host leaf declarations.

unshell-protocol/src/protocol/tests/call.rs

@@ -8,18 +8,22 @@ use crate::protocol::tree::{
     decode_call_input, encode_call_reply,
 };
 use crate::protocol::{PacketType, decode_frame};
-use crate::{Leaf, procedures};
+use crate::{leaf, procedures};
 
 fn path(parts: &[&str]) -> Vec<String> {
     parts.iter().map(|part| (*part).to_owned()).collect()
 }
 
-#[derive(Leaf)]
-#[leaf(id = "org.example.v1.echo")]
 struct EchoLeaf {
     prefix: String,
 }
 
+leaf! {
+    id = "org.example.v1.echo",
+    endpoint_struct = EchoLeaf,
+    procedures = ["echo"],
+}
+
 #[derive(Archive, Serialize, Deserialize, Debug, Clone, PartialEq, Eq)]
 struct EchoRequest {
     text: String,

unshell-protocol/src/protocol/tests/leaf_decl.rs

@@ -0,0 +1,98 @@
+use alloc::{string::String, vec};
+
+use crate::leaf;
+use crate::protocol::tree::{LeafBinding, LeafDeclaration, ProcedureMetadata, ProtocolLeaf};
+
+struct EndpointHost;
+struct Open;
+struct Reset;
+
+impl ProcedureMetadata for Open {
+    type Leaf = EndpointHost;
+    const PROCEDURE_SUFFIX: &'static str = "open";
+}
+
+impl ProcedureMetadata for Reset {
+    type Leaf = EndpointHost;
+    const PROCEDURE_SUFFIX: &'static str = "reset";
+}
+
+leaf! {
+    id = "org.example.v1.demo",
+    procedures = [Open, Reset],
+    endpoint_struct = EndpointHost,
+}
+
+struct EndpointHalf;
+struct TuiHalf;
+struct Connect;
+
+impl ProcedureMetadata for Connect {
+    type Leaf = EndpointHalf;
+    const PROCEDURE_SUFFIX: &'static str = "connect";
+}
+
+leaf! {
+    name = "chat",
+    org = "org",
+    product = "example",
+    version = "v2",
+    procedures = [Connect],
+    endpoint_struct = EndpointHalf,
+    tui_struct = TuiHalf,
+}
+
+struct TuiOnly;
+struct Tail;
+
+impl ProcedureMetadata for Tail {
+    type Leaf = TuiOnly;
+    const PROCEDURE_SUFFIX: &'static str = "tail";
+}
+
+leaf! {
+    id = "org.example.v1.transcript",
+    procedures = [Tail],
+    tui_struct = TuiOnly,
+}
+
+#[test]
+fn leaf_declaration_generates_endpoint_host_metadata() {
+    assert_eq!(EndpointHost::protocol_leaf_name(), "org.example.v1.demo");
+    assert_eq!(
+        EndpointHost::protocol_leaf_spec().procedures,
+        vec![
+            String::from("org.example.v1.demo.open"),
+            String::from("org.example.v1.demo.reset"),
+        ]
+    );
+    assert_eq!(
+        <EndpointHost as LeafBinding>::Declaration::leaf_name(),
+        "org.example.v1.demo"
+    );
+}
+
+#[test]
+fn leaf_declaration_shares_metadata_between_endpoint_and_tui_hosts() {
+    assert_eq!(
+        EndpointHalf::protocol_leaf_name(),
+        TuiHalf::protocol_leaf_name()
+    );
+    assert_eq!(
+        EndpointHalf::protocol_leaf_spec().procedures,
+        TuiHalf::protocol_leaf_spec().procedures
+    );
+    assert_eq!(
+        <EndpointHalf as LeafBinding>::Declaration::procedure_id("connect"),
+        Some(String::from("org.example.v2.chat.connect"))
+    );
+}
+
+#[test]
+fn leaf_declaration_supports_tui_only_hosts() {
+    assert_eq!(TuiOnly::protocol_leaf_name(), "org.example.v1.transcript");
+    assert_eq!(
+        <TuiOnly as LeafDeclaration>::procedure_id("tail"),
+        Some(String::from("org.example.v1.transcript.tail"))
+    );
+}

unshell-protocol/src/protocol/tests/mod.rs

@@ -1,4 +1,5 @@
 mod call;
+mod leaf_decl;
 mod procedure;
 mod protocol;
 mod tree;

unshell-protocol/src/protocol/tests/procedure.rs

@@ -6,18 +6,23 @@ use crate::protocol::tree::{
     ProcedureEffect, ProcedureRuntime, ProcedureStore, ProtocolEndpoint, encode_call_reply,
 };
 use crate::protocol::{PacketType, decode_frame};
-use crate::{Leaf, Procedure};
+use crate::{Procedure, leaf};
 
 fn path(parts: &[&str]) -> Vec<String> {
     parts.iter().map(|part| (*part).to_owned()).collect()
 }
 
-#[derive(Default, Leaf)]
-#[leaf(id = "org.example.v1.stream")]
+#[derive(Default)]
 struct StreamLeaf {
     sessions: BTreeMap<HookKey, ProcedureOpen>,
 }
 
+leaf! {
+    id = "org.example.v1.stream",
+    procedures = [ProcedureOpen],
+    endpoint_struct = StreamLeaf,
+}
+
 impl ProcedureStore<ProcedureOpen> for StreamLeaf {
     fn procedure_sessions(&mut self) -> &mut BTreeMap<HookKey, ProcedureOpen> {
         &mut self.sessions
@@ -67,10 +72,7 @@ fn procedure_runtime_routes_data_to_stored_session() {
         path(&["agent"]),
         Some(Vec::new()),
         Vec::new(),
-        vec![crate::protocol::tree::LeafSpec {
-            name: StreamLeaf::protocol_leaf_name(),
-            procedures: vec![ProcedureOpen::protocol_procedure_id()],
-        }],
+        vec![StreamLeaf::protocol_leaf_spec()],
     );
     let mut runtime =
         ProcedureRuntime::<StreamLeaf, ProcedureOpen>::new(endpoint, StreamLeaf::default());
@@ -139,12 +141,17 @@ fn procedure_runtime_routes_data_to_stored_session() {
     assert!(runtime.leaf_mut().procedure_sessions().is_empty());
 }
 
-#[derive(Default, Leaf)]
-#[leaf(id = "org.example.v1.duplex")]
+#[derive(Default)]
 struct DuplexLeaf {
     sessions: BTreeMap<HookKey, DuplexProcedure>,
 }
 
+leaf! {
+    id = "org.example.v1.duplex",
+    procedures = [DuplexProcedure],
+    endpoint_struct = DuplexLeaf,
+}
+
 impl ProcedureStore<DuplexProcedure> for DuplexLeaf {
     fn procedure_sessions(&mut self) -> &mut BTreeMap<HookKey, DuplexProcedure> {
         &mut self.sessions
@@ -197,10 +204,7 @@ fn procedure_runtime_keeps_session_after_local_end_until_explicit_close() {
         path(&["agent"]),
         Some(Vec::new()),
         Vec::new(),
-        vec![crate::protocol::tree::LeafSpec {
-            name: DuplexLeaf::protocol_leaf_name(),
-            procedures: vec![DuplexProcedure::protocol_procedure_id()],
-        }],
+        vec![DuplexLeaf::protocol_leaf_spec()],
     );
     let mut runtime =
         ProcedureRuntime::<DuplexLeaf, DuplexProcedure>::new(endpoint, DuplexLeaf::default());

unshell-protocol/src/protocol/tree/procedure.rs

@@ -46,7 +46,7 @@ use super::{
 /// struct Open;
 /// impl ProcedureMetadata for Open {
 ///     type Leaf = ExampleLeaf;
-///     fn procedure_suffix() -> &'static str { "open" }
+///     const PROCEDURE_SUFFIX: &'static str = "open";
 /// }
 /// assert_eq!(Open::procedure_id(), "org.example.v1.shell.open");
 /// ```
@@ -55,7 +55,12 @@ pub trait ProcedureMetadata: Sized {
     type Leaf: ProtocolLeaf;
 
     /// Returns the local suffix used to derive the full canonical `procedure_id`.
-    fn procedure_suffix() -> &'static str;
+    const PROCEDURE_SUFFIX: &'static str;
+
+    /// Returns the local suffix used to derive the full canonical `procedure_id`.
+    fn procedure_suffix() -> &'static str {
+        Self::PROCEDURE_SUFFIX
+    }
 
     /// Returns the canonical `procedure_id` for this procedure.
     fn procedure_id() -> String {
@@ -81,8 +86,7 @@ pub trait ProcedureMetadata: Sized {
 /// struct Open;
 /// impl ProcedureMetadata for Open {
 ///     type Leaf = ExampleLeaf;
-///
-///     fn procedure_suffix() -> &'static str { "open" }
+///     const PROCEDURE_SUFFIX: &'static str = "open";
 /// }
 /// fn _compat<T: StatefulProcedureMetadata<ExampleLeaf>>() {}
 /// _compat::<Open>();
@@ -133,15 +137,20 @@ pub trait ProcedureStore<P> {
 /// ```rust
 /// use std::collections::BTreeMap;
 /// use std::string::String;
-/// use unshell::{Leaf, Procedure};
+/// use unshell::{Procedure, leaf};
 /// use unshell::protocol::tree::{Call, HookKey, Procedure, ProcedureEffect, ProcedureStore};
 ///
-/// #[derive(Default, Leaf)]
-/// #[leaf(id = "org.example.v1.stream")]
+/// #[derive(Default)]
 /// struct StreamLeaf {
 ///     sessions: BTreeMap<HookKey, OpenProcedure>,
 /// }
 ///
+/// leaf! {
+///     id = "org.example.v1.stream",
+///     procedures = [OpenProcedure],
+///     endpoint_struct = StreamLeaf,
+/// }
+///
 /// impl ProcedureStore<OpenProcedure> for StreamLeaf {
 ///     fn procedure_sessions(&mut self) -> &mut BTreeMap<HookKey, OpenProcedure> {
 ///         &mut self.sessions