diff --git a/packages/coding-agent/src/config.ts b/packages/coding-agent/src/config.ts
index 76e2429d..603e6d84 100644
--- a/packages/coding-agent/src/config.ts
+++ b/packages/coding-agent/src/config.ts
@@ -20,6 +20,65 @@ export const isBunBinary =
 /** Detect if Bun is the runtime (compiled binary or bun run) */
 export const isBunRuntime = !!process.versions.bun;
 
+// =============================================================================
+// Install Method Detection
+// =============================================================================
+
+export type InstallMethod = "bun-binary" | "npm" | "pnpm" | "yarn" | "bun" | "unknown";
+
+let _cachedInstallMethod: InstallMethod | undefined;
+
+export function detectInstallMethod(): InstallMethod {
+	if (_cachedInstallMethod) return _cachedInstallMethod;
+
+	if (isBunBinary) {
+		_cachedInstallMethod = "bun-binary";
+		return _cachedInstallMethod;
+	}
+
+	const resolvedPath = `${__dirname}\0${process.execPath || ""}`.toLowerCase();
+
+	if (resolvedPath.includes("/pnpm/") || resolvedPath.includes("/.pnpm/") || resolvedPath.includes("\\pnpm\\")) {
+		_cachedInstallMethod = "pnpm";
+	} else if (
+		resolvedPath.includes("/yarn/") ||
+		resolvedPath.includes("/.yarn/") ||
+		resolvedPath.includes("\\yarn\\")
+	) {
+		_cachedInstallMethod = "yarn";
+	} else if (isBunRuntime) {
+		_cachedInstallMethod = "bun";
+	} else if (
+		resolvedPath.includes("/npm/") ||
+		resolvedPath.includes("/node_modules/") ||
+		resolvedPath.includes("\\npm\\")
+	) {
+		_cachedInstallMethod = "npm";
+	} else {
+		_cachedInstallMethod = "unknown";
+	}
+
+	return _cachedInstallMethod;
+}
+
+export function getUpdateInstruction(packageName: string): string {
+	const method = detectInstallMethod();
+	switch (method) {
+		case "bun-binary":
+			return `Download from: https://github.com/badlogic/pi-mono/releases/latest`;
+		case "pnpm":
+			return `Run: pnpm install -g ${packageName}`;
+		case "yarn":
+			return `Run: yarn global add ${packageName}`;
+		case "bun":
+			return `Run: bun install -g ${packageName}`;
+		case "npm":
+			return `Run: npm install -g ${packageName}`;
+		default:
+			return `Run: npm install -g ${packageName}`;
+	}
+}
+
 // =============================================================================
 // Package Asset Paths (shipped with executable)
 // =============================================================================
diff --git a/packages/coding-agent/src/modes/interactive/interactive-mode.ts b/packages/coding-agent/src/modes/interactive/interactive-mode.ts
index 300a7516..705f9ba9 100644
--- a/packages/coding-agent/src/modes/interactive/interactive-mode.ts
+++ b/packages/coding-agent/src/modes/interactive/interactive-mode.ts
@@ -48,8 +48,7 @@ import {
 	getAuthPath,
 	getDebugLogPath,
 	getShareViewerUrl,
-	isBunBinary,
-	isBunRuntime,
+	getUpdateInstruction,
 	VERSION,
 } from "../../config.js";
 import { type AgentSession, type AgentSessionEvent, parseSkillBlock } from "../../core/agent-session.js";
@@ -2754,9 +2753,7 @@ export class InteractiveMode {
 	}
 
 	showNewVersionNotification(newVersion: string): void {
-		const action = isBunBinary
-			? `Download from: ${theme.fg("accent", "https://github.com/badlogic/pi-mono/releases/latest")}`
-			: `Run: ${theme.fg("accent", `${isBunRuntime ? "bun" : "npm"} install -g @mariozechner/pi-coding-agent`)}`;
+		const action = theme.fg("accent", getUpdateInstruction("@mariozechner/pi-coding-agent"));
 		const updateInstruction = theme.fg("muted", `New version ${newVersion} is available. `) + action;
 		const changelogUrl = theme.fg(
 			"accent",