ProxyFox Debug
by Octal
ProxyFox Debug is a Quilt debugging library that wraps standard output and error streams and sanitizes sensitive strings before they reach the log.
What it does
Installed next to the Kotlin libraries it needs, ProxyFox Debug adds debugging helpers aimed at development and production diagnostics on the Quilt loader. It replaces the standard output and standard error streams with a proxy, which passes every message through string sanitization so that values such as tokens and IP addresses are masked before they are written out. Kotlin Result failures keep their exception details when they cross suspend function calls.
The mod registers a custom entrypoint under the identifier proxyfox-debug, so other Quilt mods can hook into its sanitization and printing behavior. It targets the Kotlin JVM and is built to be used outside Minecraft as well, which requires the Kotlin standard library instead of the Minecraft-specific Kotlin libraries. Quilt Kotlin Libraries (QKL) and Quilted Fabric API (QFAPI) or Quilt Standard Libraries (QSL) are the required dependencies inside Minecraft.
Either side can run it, and neither needs it. Builds exist for 1.18 – 1.20.1 across ten release versions, and the latest Quilt file, 1.0.0, targets 1.20.1. The code is released under the Mozilla Public License 2.0 and is open source.
Key features
Output stream proxy
Standard output and standard error are replaced with a proxy that handles every printed line before it is displayed.
String sanitization
Sensitive strings such as access tokens and IP addresses are masked in printed output.
Exception details across suspend calls
Kotlin Result failures keep their exception information when they pass through suspend function calls.
Custom entrypoint
A dedicated entrypoint under the identifier proxyfox-debug lets other mods register with the debugging layer.
Compatibility
Latest build for each game version and loader.
1.20.x2 of 2 versions with builds
1.19.x5 of 5 versions with builds
1.18.x3 of 3 versions with builds
Only full game releases are shown. This mod publishes no snapshot builds.
Requirements
Dependencies declared by the latest file for each loader.
Required 2
Use cases
Debugging a Quilt mod
Developers working on a Quilt mod can use the proxy output to trace problems while keeping private values out of the log.
Production diagnostics
Server owners can keep sensitive data such as tokens out of logs that are shared when reporting a problem.
Who it’s for: Mod developers building on Quilt and Kotlin, and server owners who share logs when diagnosing problems. Players who only want gameplay content will find nothing new here.
Questions
Does ProxyFox Debug need Kotlin libraries?
Which loader does ProxyFox Debug support?
Does the mod have to be installed on the server?
In the catalog
ProxyFox Debug is one of 8,016 Management mods on ModsFinder, and one of 1,011 Management mods for Quilt. 34,764 mods support Minecraft 1.20.1.
More from Octal
Similar mods
What the author says
A Quilt mod targeting Kotlin and the JVM, adding features useful for debugging applications in production. If using with Minecraft, Quilt Kotlin Libraries is required. If using outside of Minecraft, Kotlin StdLib is required.
Official listing
- Modrinth page
- modrinth.com/mod/proxyfox-debug
- Owner
- Octal
- Published
- 2023-06-12
- Updated on Modrinth
- 2023-06-12
- Facts verified
- 2026-10-15