Lumen is unclaimed —

Lumen

A focused place for your notes, tasks, and ideas.·lumentodo.com

Lumen is a minimalist markdown-based productivity system for macOS that combines notes, tasks, and ideas in one workspace, inspired by GTD, Obsidian, and Zettelkasten. It includes AI features such as a self-organizing todo list, inbox processing suggestions, meeting recording and summarization, and an AI chat that can ingest text from other apps. Notes are stored as plain Markdown files in a local vault with no required registration.

What it's for

Organizing notes, tasks, and ideas in one workspaceSelf-organizing a todo list based on a user-defined structure like GTDPrioritizing tasks based on context like location or time availableCategorizing inbox items with AI suggestionsReviewing proposed edits to a todo list via diff viewBringing text from other apps into AI chat for follow-ups, summaries, or draftingRecording and summarizing meetings into notes and action itemsWriting in a markdown editor with note hyperlinks and backlinksSaving and reusing custom AI prompts

Features 10

AI chat with Cmd+H shortcut to bring in text from other apps
Custom prompt library for reuse in chat and notes
Diff view for reviewing proposed todo list edits
Inbox processing with categorization suggestions
Local Markdown file storage (no vendor lock-in)
Markdown editor with note hyperlinks and backlinks
Meeting audio recording with note and action item generation
Self-healing/self-organizing AI todo list
Uses user's own OpenAI and Speech-to-Text API keys for AI features
Works with existing local Obsidian vaults

At a glance

TypeDesktop app

DeploymentInstalled (local)

PlatformsmacOS

Integrations

OpenAIObsidian

Pricing

The page mentions 'Free licences remaining' during the beta period, but no pricing plans or amounts are stated.