feat: core agent tools (fs, search, shell)

src/App.tsx

@@ -1,49 +1,77 @@
 import { useState } from "react";
-import reactLogo from "./assets/react.svg";
 import { invoke } from "@tauri-apps/api/core";
+import { open } from "@tauri-apps/plugin-dialog";
+import { ToolTester } from "./components/ToolTester";
 import "./App.css";
 
 function App() {
-  const [greetMsg, setGreetMsg] = useState("");
-  const [name, setName] = useState("");
+  const [projectPath, setProjectPath] = useState<string | null>(null);
+  const [errorMsg, setErrorMsg] = useState<string | null>(null);
 
-  async function greet() {
-    // Learn more about Tauri commands at https://tauri.app/develop/calling-rust/
-    setGreetMsg(await invoke("greet", { name }));
+  async function selectProject() {
+    try {
+      setErrorMsg(null);
+      // Open native folder picker
+      const selected = await open({
+        directory: true,
+        multiple: false,
+      });
+
+      if (selected === null) {
+        // User cancelled selection
+        return;
+      }
+
+      // Invoke backend command to verify and set state
+      // Note: invoke argument names must match Rust function args
+      const confirmedPath = await invoke<string>("open_project", {
+        path: selected,
+      });
+      setProjectPath(confirmedPath);
+    } catch (e) {
+      console.error(e);
+      setErrorMsg(
+        typeof e === "string" ? e : "An error occurred opening the project.",
+      );
+    }
   }
 
   return (
     <main className="container">
-      <h1>Welcome to Tauri + React</h1>
+      <h1>AI Code Assistant</h1>
 
-      <div className="row">
-        <a href="https://vite.dev" target="_blank">
-          <img src="/vite.svg" className="logo vite" alt="Vite logo" />
-        </a>
-        <a href="https://tauri.app" target="_blank">
-          <img src="/tauri.svg" className="logo tauri" alt="Tauri logo" />
-        </a>
-        <a href="https://react.dev" target="_blank">
-          <img src={reactLogo} className="logo react" alt="React logo" />
-        </a>
-      </div>
-      <p>Click on the Tauri, Vite, and React logos to learn more.</p>
+      {!projectPath ? (
+        <div className="selection-screen">
+          <p>
+            Please select a project folder to start the Story-Driven Spec
+            Workflow.
+          </p>
+          <button onClick={selectProject}>Open Project Directory</button>
+        </div>
+      ) : (
+        <div className="workspace">
+          <div
+            className="toolbar"
+            style={{
+              padding: "10px",
+              background: "#f0f0f0",
+              borderRadius: "4px",
+              color: "#333",
+            }}
+          >
+            <strong>Active Project:</strong> {projectPath}
+          </div>
+          <hr style={{ margin: "20px 0" }} />
+          <p>Project loaded successfully.</p>
+          <ToolTester />
+        </div>
+      )}
 
-      <form
-        className="row"
-        onSubmit={(e) => {
-          e.preventDefault();
-          greet();
-        }}
-      >
-        <input
-          id="greet-input"
-          onChange={(e) => setName(e.currentTarget.value)}
-          placeholder="Enter a name..."
-        />
-        <button type="submit">Greet</button>
-      </form>
-      <p>{greetMsg}</p>
+      {errorMsg && (
+        <div className="error-message" style={{ marginTop: "20px" }}>
+          <p style={{ color: "red" }}>Error: {errorMsg}</p>
+        </div>
+      )}
     </main>
   );
 }

src/components/ToolTester.tsx

@@ -0,0 +1,69 @@
+import { useState } from "react";
+import { invoke } from "@tauri-apps/api/core";
+
+export function ToolTester() {
+  const [output, setOutput] = useState<string>("Ready.");
+
+  const runCommand = async (name: string, args: Record<string, unknown>) => {
+    setOutput(`Running ${name}...`);
+    try {
+      // eslint-disable-next-line @typescript-eslint/no-explicit-any
+      const res = await invoke(name, args);
+      setOutput(JSON.stringify(res, null, 2));
+    } catch (e) {
+      setOutput(`Error: ${e}`);
+    }
+  };
+
+  return (
+    <div
+      style={{ marginTop: "20px", border: "1px solid #ccc", padding: "10px" }}
+    >
+      <h3>Tool Tester</h3>
+      <div style={{ display: "flex", gap: "10px", flexWrap: "wrap" }}>
+        <button onClick={() => runCommand("list_directory", { path: "." })}>
+          List Root
+        </button>
+        <button
+          onClick={() =>
+            runCommand("read_file", { path: ".living_spec/README.md" })
+          }
+        >
+          Read Spec
+        </button>
+        <button onClick={() => runCommand("search_files", { query: "Story" })}>
+          Search "Story"
+        </button>
+        <button
+          onClick={() =>
+            runCommand("exec_shell", { command: "ls", args: ["-F"] })
+          }
+        >
+          Shell: ls -F
+        </button>
+        <button
+          onClick={() =>
+            runCommand("exec_shell", { command: "git", args: ["status"] })
+          }
+        >
+          Shell: git status
+        </button>
+      </div>
+
+      <pre
+        style={{
+          marginTop: "10px",
+          background: "#333",
+          color: "#fff",
+          padding: "10px",
+          borderRadius: "5px",
+          overflowX: "auto",
+          textAlign: "left",
+          fontSize: "12px",
+        }}
+      >
+        {output}
+      </pre>
+    </div>
+  );
+}

src/types.ts

@@ -0,0 +1,15 @@
+export interface FileEntry {
+  name: string;
+  kind: "file" | "dir";
+}
+
+export interface SearchResult {
+  path: string;
+  matches: number;
+}
+
+export interface CommandOutput {
+  stdout: string;
+  stderr: string;
+  exit_code: number;
+}