feat: add pi hook installer (#3398)

Support installing the pi extension via `atuin hook install pi`. Bundle
the extension in the binary and update the docs.

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- [ ] I am happy for maintainers to push small adjustments to this PR,
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same thing

1 files changed, 87 insertions, 0 deletions

diff --git a/examples/pi/atuin.ts b/examples/pi/atuin.ts
new file mode 100644
index 00000000..55c17cb8
--- /dev/null
+++ b/examples/pi/atuin.ts
@@ -0,0 +1,87 @@
+/**
+ * Atuin extension for pi.
+ *
+ * Tracks bash commands executed by pi in Atuin history with author `pi`.
+ *
+ * Install with:
+ *   atuin hook install pi
+ *
+ * Then restart pi or run /reload.
+ */
+
+import type { BashOperations, ExtensionAPI } from "@mariozechner/pi-coding-agent";
+import { createBashTool, createLocalBashOperations } from "@mariozechner/pi-coding-agent";
+
+const ATUIN_AUTHOR = "pi";
+const ATUIN_TIMEOUT_MS = 10_000;
+
+async function startHistory(
+	pi: ExtensionAPI,
+	cwd: string,
+	command: string,
+): Promise<string | undefined> {
+	try {
+		const result = await pi.exec(
+			"atuin",
+			["history", "start", "--author", ATUIN_AUTHOR, "--", command],
+			{ cwd, timeout: ATUIN_TIMEOUT_MS },
+		);
+
+		if (result.code !== 0) return undefined;
+
+		const id = result.stdout.trim();
+		return id.length > 0 ? id : undefined;
+	} catch {
+		return undefined;
+	}
+}
+
+async function endHistory(
+	pi: ExtensionAPI,
+	cwd: string,
+	historyId: string,
+	exitCode: number,
+): Promise<void> {
+	try {
+		await pi.exec(
+			"atuin",
+			["history", "end", historyId, "--exit", String(exitCode)],
+			{ cwd, timeout: ATUIN_TIMEOUT_MS },
+		);
+	} catch {
+		// Ignore Atuin failures so command execution is never blocked.
+	}
+}
+
+export default function atuinPiExtension(pi: ExtensionAPI) {
+	const cwd = process.cwd();
+	const local = createLocalBashOperations();
+
+	const trackedOperations: BashOperations = {
+		async exec(command, commandCwd, options) {
+			const historyId = await startHistory(pi, commandCwd, command);
+			let exitCode: number | null = null;
+
+			try {
+				const result = await local.exec(command, commandCwd, options);
+				exitCode = result.exitCode;
+				return result;
+			} finally {
+				if (historyId) {
+					await endHistory(
+						pi,
+						commandCwd,
+						historyId,
+						exitCode ?? (options.signal?.aborted ? 130 : 1),
+					);
+				}
+			}
+		},
+	};
+
+	pi.registerTool(
+		createBashTool(cwd, {
+			operations: trackedOperations,
+		}),
+	);
+}