Start factoring out code from initial spike

pi-test-status/README.md

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+# pi-test-status
+
+A [Pi](https://pi.dev) extension that watches for test runs and shows a pass/fail widget in the Pi UI.
+
+## Features
+
+- Detects `vitest` and `npm test` commands in bash tool calls
+- Parses vitest output to determine pass/fail status
+- Shows a live widget indicator (● green for pass, ● red for fail)
+- Displays the summary line from the test output
+
+## Installation
+
+```bash
+pi install npm:pi-test-status
+```
+
+Or with a scope:
+
+```bash
+pi install npm:@your-scope/pi-test-status
+```
+
+## Development
+
+```bash
+pi -e ./extensions/index.ts
+```
+
+Or from the package root:
+
+```bash
+pi -e .
+```
+
+## Usage
+
+Once installed, the extension automatically activates when you run tests:
+
+```bash
+# In Pi, just run your tests — the widget appears automatically
+npm test
+npx vitest
+vitest run
+```
+
+The widget shows:
+- Green ● with summary on test pass
+- Red ● with summary on test failure
+
+## How it works
+
+The extension subscribes to the `tool_result` event. When a bash tool call matches a test command, it parses the vitest output for pass/fail indicators and updates a Pi widget with the result.
+
+## License
+
+MIT

pi-test-status/extensions/index.ts

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+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")
+}

pi-test-status/package.json

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+{
+  "name": "pi-test-status",
+  "version": "0.1.0",
+  "description": "Pi extension that shows test status (pass/fail) as a widget after running tests",
+  "keywords": ["pi-package", "pi-extension", "test-status", "vitest"],
+  "type": "module",
+  "main": "extensions/index.ts",
+  "files": [
+    "extensions",
+    "README.md"
+  ],
+  "scripts": {
+    "test": "echo \"No tests yet\""
+  },
+  "peerDependencies": {
+    "@earendil-works/pi-coding-agent": "*"
+  },
+  "pi": {
+    "extensions": ["./extensions"]
+  },
+  "license": "MIT"
+}