Patina — A Second Brain in Markdown

Built on tools you already use

Your data flows in, turns into markdown, and AI keeps it current.

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Connect your apps

Link the tools you already use: email, calendar, messages, health, finances. Patina pulls from all of them.

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Everything becomes markdown

Your data is synced into a single folder of plain text files on your computer.

AI acts on it for you

Claude reads your files, answers questions, and keeps everything current.

Self-updating profiles for you and everyone you know

Pulled from dozens of connected apps. Always current, zero effort.

Identity profile

A living document that reflects your beliefs, values, and inner conflicts while shaping how the system talks to you.

A living document that reflects your beliefs, values, and inner conflicts.

identity.md

People files

Automatic profiles for everyone you interact with helping you understand your relationships over time.

Auto-updating profiles for everyone you interact with.

friend.md

Briefings that write themselves

Structured recaps pulled from your real data.

Morning briefing

Weather, schedule, open loops, and messages that need replies. Cross-referenced against what you've already handled.

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End-of-day digest

Every conversation, meeting, and task from the day in one file. Verified open loops with a log of what was checked before flagging anything.

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Weekly check-in

Sunday evening look-ahead with your full week schedule, goal progress, and open threads carried over from recent digests.

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Your data, your machine

Plain text files you own. No server, no cloud, no lock-in.

Private by design

All your data lives as plain text files on your computer with no way for anyone else to access them.

You're always in control

It only reads and writes to your local files, never sends messages or takes actions on its own.

Fully customizable

It's all plain text and markdown, so you can ask Claude to change anything about how it works.

Beyond the terminal

Apps for iOS and macOS that read and write to your repo.

Sumi

The fastest way to commit your thoughts, create new tasks, and chat with your data from your phone.

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Recall

Finds gaps in your profile and asks one question at a time to fill them. Your answers go straight to your files.

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Patina for Mac

Schedule briefings, digests, and syncs to run automatically from your Mac menu bar.

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