plugin: add rust pdk template

docs/examples/plugin-component-tool/lib.rs

@@ -1,23 +1,35 @@
-//! Minimal Component Model Tool plugin authoring sketch.
+//! Minimal Component Model Tool plugin authoring sketch using `yoi-plugin-pdk`.
 //!
-//! Build this as a `wasm32-unknown-unknown` cdylib with `wit-bindgen`-generated
-//! exports and package the adapted component as `plugin.component.wasm`.
+//! Build this as a `wasm32-unknown-unknown` cdylib with Component Model tooling
+//! and package the adapted component as `plugin.component.wasm`.
 
-wit_bindgen::generate!({
+use serde::{Deserialize, Serialize};
+use yoi_plugin_pdk::{ToolContext, ToolError, ToolOutput};
+
+yoi_plugin_pdk::wit_bindgen::generate!({
     world: "tool",
     path: "../../../resources/plugin/wit",
 });
 
-struct Plugin;
-
-impl Guest for Plugin {
-    fn call(tool_name: String, input_json: String) -> String {
-        // Ordinary ToolOutput JSON. The runtime routes this through the normal
-        // Worker/Tool result path; no context is injected by the component.
-        format!(
-            r#"{{"summary":"component tool {tool_name}","content":"input was {input_json}"}}"#
-        )
-    }
+#[derive(Debug, Deserialize)]
+struct EchoInput {
+    text: String,
 }
 
-export!(Plugin);
+#[derive(Debug, Serialize)]
+struct EchoOutput<'a> {
+    tool: &'a str,
+    text: String,
+}
+
+fn handle_echo(ctx: ToolContext, input: EchoInput) -> Result<ToolOutput, ToolError> {
+    ToolOutput::json(
+        format!("{} ok", ctx.tool_name()),
+        EchoOutput {
+            tool: ctx.tool_name(),
+            text: input.text,
+        },
+    )
+}
+
+yoi_plugin_pdk::export_component_tool!(Plugin, handle_echo);