From 2b656c266bdbb85e913f86f5ce2a55ada1d2ee0b Mon Sep 17 00:00:00 2001
From: Mario Zechner <badlogicgames@gmail.com>
Date: Wed, 21 Jan 2026 16:43:21 +0100
Subject: [PATCH] feat(coding-agent): add .gitignore to package manager install
 roots

---
 .../coding-agent/src/core/package-manager.ts  | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/packages/coding-agent/src/core/package-manager.ts b/packages/coding-agent/src/core/package-manager.ts
index 9a6d15d2..52af805c 100644
--- a/packages/coding-agent/src/core/package-manager.ts
+++ b/packages/coding-agent/src/core/package-manager.ts
@@ -92,6 +92,7 @@ export class DefaultPackageManager implements PackageManager {
 		this.cwd = options.cwd;
 		this.agentDir = options.agentDir;
 		this.settingsManager = options.settingsManager;
+		this.ensureGitIgnoreDirs();
 	}
 
 	setProgressCallback(callback: ProgressCallback | undefined): void {
@@ -436,6 +437,7 @@ export class DefaultPackageManager implements PackageManager {
 		if (!existsSync(installRoot)) {
 			mkdirSync(installRoot, { recursive: true });
 		}
+		this.ensureGitIgnore(installRoot);
 		const packageJsonPath = join(installRoot, "package.json");
 		if (!existsSync(packageJsonPath)) {
 			const pkgJson = { name: "pi-extensions", private: true };
@@ -443,6 +445,23 @@ export class DefaultPackageManager implements PackageManager {
 		}
 	}
 
+	private ensureGitIgnoreDirs(): void {
+		this.ensureGitIgnore(join(this.agentDir, "git"));
+		this.ensureGitIgnore(join(this.agentDir, "npm"));
+		this.ensureGitIgnore(join(this.cwd, CONFIG_DIR_NAME, "git"));
+		this.ensureGitIgnore(join(this.cwd, CONFIG_DIR_NAME, "npm"));
+	}
+
+	private ensureGitIgnore(dir: string): void {
+		if (!existsSync(dir)) {
+			mkdirSync(dir, { recursive: true });
+		}
+		const ignorePath = join(dir, ".gitignore");
+		if (!existsSync(ignorePath)) {
+			writeFileSync(ignorePath, "*\n!.gitignore\n", "utf-8");
+		}
+	}
+
 	private getNpmInstallRoot(scope: SourceScope, temporary: boolean): string {
 		if (temporary) {
 			return this.getTemporaryDir("npm");