Foolproof
by Txni
With Foolproof installed, players see clearer messages in several confusing moments, such as a replaced resourcepack label, a command error and a server startup notice.
What it does
Foolproof is a utility for modpack developers that changes a set of messages players often misread. It swaps the "Available Resourcepacks" label for "Optional Resourcepacks", so people understand they can enable those packs. It also replaces the generic "Unknown Command" text shown in survival when a command exists, and rewrites the "Connection timed out: getsockopt" error with a description of how to fix a connection blocked by a firewall.
Other changes cover the server side and the start of play. Chat gets a notice five seconds after startup saying the server is online and ready to join. The "Can't keep up" warning stays hidden for the first two minutes of a server's life, while it is under heavy load during startup. When a grave mod is installed and a player dies in the void, a chat message reminds them that the grave still exists, and a prompt appears before a third-party world type can be cycled in settings. New players also see a reminder that the Quest Book exists through ImmersiveMessages on their first join.
Foolproof is published for Fabric, Forge and NeoForge, with files for 1.20 – 1.21.1. It needs Fabric API and TxniLib. The code is covered by a custom license that is not open source, and public links exist for the source code and the issue tracker.
Key features
Clearer resourcepack label
The Available Resourcepacks screen reads Optional Resourcepacks, which makes clear that those packs must be enabled.
Descriptive command error
Survival players who type an existing command see a message instead of a generic unknown command notice.
Connection error guidance
The timeout error is replaced by a message that explains how to address a server blocked by a firewall.
Startup and load notices
A chat message announces that the server is ready five seconds after start, and the lag warning is suppressed for two minutes.
Grave and world type reminders
Players are told when a grave remains after a void death, and a prompt guards certain world type settings.
Compatibility
Latest build for each game version and loader.
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
Modpacks for new players
Pack authors who expect first-time players can use the messages to reduce common confusion about resourcepacks, commands and connections.
Public servers
Server owners get a ready notice after startup and a quieter lag warning while the server loads.
Who it’s for: Modpack developers who want to reduce common player confusion, and server owners who run packs with Fabric, Forge or NeoForge.
Questions
Does Foolproof need Fabric API on every loader?
Must the server run Foolproof as well as the players?
Does Foolproof change the grave or world type features themselves?
In the catalog
Foolproof is one of 3,514 Library mods on ModsFinder, and one of 2,348 Library mods for Fabric. 32,366 mods support Minecraft 1.21.1.
More from Txni
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What the author says
Foolproof is a modpack utility mod that fixes many common areas of user confusion that would otherwise lead to bug reports, erroneous GitHub issues, complaining on Discord, and otherwise bad experiences. It does this mostly by tweaking poorly worded language and UX design, and better explaining the steps for…
Official listing
- Modrinth page
- modrinth.com/mod/foolproof
- Owner
- Txni
- Published
- 2025-08-22
- Updated on Modrinth
- 2025-09-23
- Facts verified
- 2026-10-15