Merge commit '67b361f0e99135c578d5764c915b413f457dd67a' as 'third_party/pi'

third_party/pi/packages/coding-agent/examples/plugins/pi-example-plugin/src/contract.ts

@@ -0,0 +1,13 @@
+import { type Context, defineService, type ReplicatedState } from "@earendil-works/chord";
+
+export interface ExampleFacetReply {
+	readonly message: string;
+	readonly workerActivations: number;
+}
+
+export interface ExampleFacetService {
+	readonly workerActivations: ReplicatedState<{ count: number }>;
+	greet(input: { readonly name: string }, context: Context): Promise<ExampleFacetReply>;
+}
+
+export const ExampleFacetService = defineService<ExampleFacetService>("pi.example-plugin.greeting");

third_party/pi/packages/coding-agent/examples/plugins/pi-example-plugin/src/session.ts

@@ -0,0 +1,23 @@
+import { defineFacet } from "@earendil-works/chord";
+import { BACKGROUND_CONTEXT } from "@earendil-works/chord/context";
+import { ExampleFacetService } from "./contract.ts";
+
+export default defineFacet({
+	id: "@earendil-works/pi-example-plugin/session",
+	setup(env) {
+		const workerActivations = env.replicatedState({ count: 0 });
+		env.provide(ExampleFacetService, {
+			workerActivations,
+			async greet({ name }) {
+				return {
+					message: `Hello ${name} from the bundled Session worker facet!!!`,
+					workerActivations: workerActivations.value.count,
+				};
+			},
+		});
+		env.onActivate(() => {
+			workerActivations.state.count += 1;
+			workerActivations.publish(BACKGROUND_CONTEXT);
+		});
+	},
+});

third_party/pi/packages/coding-agent/examples/plugins/pi-example-plugin/src/tui.ts

@@ -0,0 +1,31 @@
+import { defineFacet } from "@earendil-works/chord";
+import { AgentController, PresentationUI, SlashCommands } from "@earendil-works/pi-coding-agent/experimental/plugin";
+import { ExampleFacetService } from "./contract.ts";
+
+export default defineFacet({
+	id: "@earendil-works/pi-example-plugin/tui",
+	setup(env) {
+		const example = env.use(ExampleFacetService);
+		const commands = env.use(SlashCommands);
+		const controller = env.use(AgentController);
+		const ui = env.use(PresentationUI);
+		env.onActivate(() => {
+			env.own(
+				commands.replace({
+					name: "hello",
+					description: "Call the bundled Session worker facet",
+					argumentHint: "<name>",
+					async run(args, context) {
+						const message = args.length === 0 ? "from the TUI" : args;
+						const reply = await example.greet({ name: message }, context);
+						ui.showStatus(
+							`We got this: ${reply.message} Worker activations: ${reply.workerActivations}.`,
+							context,
+						);
+						return controller.prompt({ message: `pong: ${message}`, images: null }, context);
+					},
+				}),
+			);
+		});
+	},
+});