Start factoring out code from initial spike

pi-test-status/extensions/index.ts

@@ -0,0 +1,43 @@
+import {type ExtensionAPI, isBashToolResult} from "@earendil-works/pi-coding-agent";
+import {isTestCommand} from "./parsing/typescript-command-output";
+
+// noinspection JSUnusedGlobalSymbols
+export default function testStatusExtension(pi: ExtensionAPI) {
+    // After every tool execution, check if tests just ran
+    pi.on("tool_result", async (event, ctx) => {
+        // Only care about bash commands
+        if (!isBashToolResult(event)) return;
+        if (!isTestCommand(event.input.command as string) ) return;
+
+        const textContent = event.content.find((c): c is { type: "text"; text: string } => c.type === "text");
+        const output = textContent?.text ?? "";
+        const theme = ctx.ui.theme;
+
+        // Detect pass/fail from vitest summary output
+        const testsPassed =
+            /Tests\s+.+passed/.test(output) && !/Tests\s+.+failed/.test(output);
+        const testsFailed =
+            /Tests\s+.+failed/.test(output) || event.details?.exitCode !== 0;
+
+        if (testsPassed) {
+            // Extract summary line for inline detail (e.g., "1 passed (242ms)")
+            const summaryLine = output
+                .split("\n")
+                .find((line: string) => /Test Files\s+.+passed/.test(line));
+            const summary = summaryLine?.trim() ?? "All tests passed";
+
+            ctx.ui.setWidget("test-status", [
+                `${theme.fg("success", "●")} ${theme.fg("text", summary)}`,
+            ]);
+        } else if (testsFailed) {
+            const summaryLine = output
+                .split("\n")
+                .find((line: string) => /Tests\s+.+failed/.test(line));
+            const summary = summaryLine?.trim() ?? "Tests failed";
+
+            ctx.ui.setWidget("test-status", [
+                `${theme.fg("error", "●")} ${theme.fg("text", summary)}`,
+            ]);
+        }
+    });
+}

pi-test-status/extensions/parsing/typescript-command-output.ts

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+export const isTestCommand = (command: string) => {
+    return command.includes("npm test") || command.includes("vitest")
+}