Use Case: sveltejs/kit - The SvelteKit Framework

Repository: https://github.com/sveltejs/kit Stack: TypeScript + Svelte Test Date: 2025-12-08 Loctree Version: 0.6.2-dev

Overview

Testing loctree on SvelteKit - validating virtual module resolution ($app/*, $lib/*).

Repository Scale

Metric	Value
Files Scanned	1,117
Analysis Time	26.92 seconds
Throughput	41 files/sec

Findings

Dead Code Detection

High Confidence: 0
False Positive Rate: ~0%

Virtual Module Resolution - MAJOR FIX

// Previously flagged as dead (WRONG):
export function enhance() { }  // in packages/kit/src/runtime/app/forms.js

// Used via virtual module:
import { enhance } from '$app/forms';  // NOW CORRECTLY RESOLVED!

Version History

Version	FP Rate	Status
0.5.16	83%	Virtual modules broken
0.5.17	67%	Slightly better
0.6.1-dev	~100%	REGRESSION
0.6.2-dev	~0%	FIXED!

Commands Used

cd SvelteKit
loct                              # Create snapshot
loct dead --confidence high       # Dead code analysis
loct twins                        # Duplicate detection

Verdict

EXCELLENT - Virtual module resolution is production-ready.

Key Insights

Virtual Modules: $app/forms, $lib/* correctly resolved
Framework Magic: load(), prerender exports recognized
Major Improvement: From 100% FP to ~0% FP

SvelteKit-Specific Features

Loctree now handles:

$app/forms, $app/navigation, $app/stores
$lib/* path aliases
+page.server.ts magic exports
export const prerender = true patterns