The Obsidian-compatible Watcher for ActivityWatch plugin integrates with ActivityWatch to track user activity within Obsidian vaults. It monitors the active vault and the currently opened markdown file, providing insights into time spent on individual files. The collected data is sent to the local ActivityWatch server, ensuring it remains on the user's device unless explicitly shared via ActivityWatch's multi-device features. This plugin is ideal for users who want to monitor and evaluate their time management and activity within Obsidian.