"What did I learn about machine learning this week?"
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Your digital life, made searchable on demand.
Daylens is a local-first memory system for your laptop. It watches what you do, enriches it with Claude, and lets you ask anything in plain language.
The apps you already live in.
Daylens watches without integrations, plug-ins, or permissions you'll regret.
Memory over surveillance.
The data you generate every day should belong to you. So it does.
0
Sessions watched this week
0
Apps in active orbit
0%
Data shared with anyone else
Ask anything. Get a real answer.
Four queries, four real answers from real data on a real laptop. No mocks. No edits.
"What did I work on today?"
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"How long was I in Ghostty during Building & Testing blocks?"
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"Show me what I actually consumed in Dia."
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Nothing leaves your device unless you ask.
The privacy model is not a feature. It is the constraint that makes the rest of the product trustworthy.
Local-first
A single SQLite file on your laptop. No cloud. No account.
Free, forever, on every Mac.
Open source. CBC Spring 2026 Hackathon submission.
- Every byte stored locally in SQLite
- Zero background telemetry
- Zero third-party analytics
- Only your question is sent to Claude, per query
- MCP access is opt-in and revocable
- Settings shows every captured field
- Delete the database, delete every byte
Daylens is designed around the inverse of surveillance. You see what is captured. You decide what your AI can read. The product is self-knowledge under your control.
Three Claude integrations, not one.
Substantive use of the API. Not a chatbot wrapped around your schedule.
Content Indexer
A background job sends every new browser session to Claude with a two-sentence, topic-tagged prompt. Results land in a local SQLite table the chat can search. Built this week.
Tool-calling chat
Claude with SQLite tables and the content index as tools. Deterministic router handles common shapes first. searchContentByTopic returns what you actually consumed.
MCP server
Opt-in MCP exposes Daylens to Claude Desktop, Cursor, and Claude Code. Your work history becomes context for any agent. Off by default, revocable from Settings.
Local-first by design
Every byte lives in a single SQLite file on your laptop. The only thing that leaves the device is the question you choose to ask.
See it answer in real time.
A three-minute walkthrough against live data. Same four queries. Real answers.
demo · uploading
Get your history back.
Open source. Local-first. Available now for macOS. Windows and Linux are next.
Source on GitHub.