Cosmic Chat Alerts

A client-side Fabric mod that lets you create custom chat notifications through a fully in-game UI. Set a phrase or regex pattern to watch for, choose a sound, and the mod plays it whenever a matching message appears. Works on any server with no server-side installation required.

Features

Sound Alerts

Choose any in-game sound as your alert tone from a searchable picker with a quick-pick row for common choices. Sounds can be previewed before confirming. Volume is configurable per alert (0–200%) with automatic preview playback as you adjust the slider.

Pattern Matching

Alerts can match by plain text substring or full Java regular expression, with an optional case-sensitive toggle per alert.

On-Screen Text Alerts

Pair any alert with on-screen text displayed as a Title, Subtitle, or Action Bar message. Use $1, $2, … to embed regex capture groups into the displayed text — for example, detect "(\d+) seconds left" and display the number as a subtitle.

Time Delay

Trigger an alert a set number of seconds after a message is detected, with decimal precision. Useful for countdowns — detect the start of an event and receive a reminder when it is about to end.

Formatting Palette

An inline color and style palette sits directly in the alert editor. Click any of the 16 color swatches or 5 style buttons to insert the formatting code at your cursor — no manual color codes required.

Load From Recent Chat

Browse your last 100 chat messages and load any one directly into the pattern field when creating or editing an alert.

Import & Export

Share alerts with other players using a compact JSON export code. Copy it from the editor, send it however you like, and the recipient can paste it directly into the Import screen.

Alert Management

• Name alerts for easy identification
• Enable or disable alerts individually without deleting them
• Reorder alerts with per-row ▲ / ▼ buttons, or sort all disabled alerts to the bottom in one click
• Green and red row tinting provides an instant visual overview of active alerts

Getting Started

Bind a key to "Open Chat Alerts" under the Chat Alerts category in Controls — it is unbound by default. The UI can be opened from anywhere, including the main menu.

Example Use Cases

• Server event starting soon — plain text match on "begins in 30 seconds"
• Time remaining on screen — regex "(\d+) seconds left" with display text $1
• Name mention detection — regex "(?i)YourName" with case-sensitive off
• Delayed reminder — detect an event start message, set a 300-second delay
• Multiple keywords — regex "(keyword1|keyword2|keyword3)"

Installation

1. Download the .jar file from this Modrinth project
2. Add the Cosmic Chat Alerts jar to your mods folder

Client-side only. No server installation required. Settings are stored in config/cosmic-chat-alerts.json.

Requires: Fabric API
Environment: Client only
Minecraft: 1.21.11