FomoChatLog

A Fomo add-on for On Together that logs all in-game chat messages to a local text file with timestamps and channel labels.

Requirements

• Fomo (hard dependency)

Features

• Appends every global and local chat message (and system notifications) to a text file
• Configurable log file path
• Configurable format strings for chat messages and notifications
• Log file is cleared automatically at the start of each new day
• Optional TMP tag stripping via the core Fomo CleanChatSinkTags config

In-Game Commands

Type any command into the in-game chat. Commands start with / and are not sent to other players.

• /fomochatlogtoggle (/fclt) — Toggle chat file logging on/off
• /fomochatloggetpath (/fclgp) — Print the current log file path
• /fomochatlogsetpath <path> (/fclsp) — Set the log file path (supports ~ and environment variables)
• /fomochatlogmessageformat [format] (/fclmf) — Get or set the chat message format string
• /fomochatlognotificationformat [format] (/fclnf) — Get or set the notification format string

Examples

/fomochatlogsetpath ~/on-together/fomo/chat.txt
/fomochatlogmessageformat [{timestamp:HH:mm}] [{channel:short}] {username}: {message}

Configuration

Located in BepInEx/config/com.andrewlin.ontogether.fomochatlog.cfg

• General
  • EnableFeature (default: true) — Enable or disable writing to the log file
  • ChatLogPath (default: ~/on-together/fomo/on_together_chat_log.txt) — Path to the log file. Supports ~ and environment variables
• Formatting
  • MessageFormat (default: [{timestamp:yyyy-MM-dd HH:mm:ss}] [{channel}] {username}: {message}) — Format string for chat messages written to the log file
  • NotificationFormat (default: [{timestamp:yyyy-MM-dd HH:mm:ss}] {message}) — Format string for system notifications written to the log file

Tag cleaning: Use CleanChatSinkTags in the core Fomo config to strip TMP formatting tags from messages before they reach any sink, including this one.

Format Placeholders

The MessageFormat and NotificationFormat settings accept the following placeholders:

• {timestamp} — message time; accepts a C# DateTime format specifier (e.g. {timestamp:HH:mm})
• {channel} — full channel label use {channel:short} for just the first character (G / L)
• {username} — display name of the sender
• {message} — message body
• {distance} — distance in metres for local messages, empty for global/notifications
• {source} — internal message source identifier
• {playerid} — sender's player ID

Log Format

With the default MessageFormat:

[2026-03-01 21:30:15] [G] PlayerName: hello world
[2026-03-01 21:31:02] [L] OtherPlayer: hey nearby!
[2026-03-01 21:32:45] PlayerName joined the lobby.

Installation

Use r2modman or the Thunderstore app for the simplest install. Fomo must be installed first.

Manual:

1. Install Fomo first
2. Copy AndrewLin.FomoChatLog.dll into BepInEx/plugins/
3. Launch the game — a config file will be generated at BepInEx/config/com.andrewlin.ontogether.fomochatlog.cfg