THUFIR
Your Personal Mentat
An AI colleague that remembers you, follows up on its own, and gets things done with your tools, within the rules you set.
“It is by will alone I set my mind in motion.”
What it does for you
Every morning
It tells you what is due today and what is late, from the cases and todos it keeps for you.
Before a deadline
It reminds you in time, on your phone too if you add Telegram.
It sees things through
Hand it an errand: a claim, a purchase, a listing. It does the research and the drafts, shows you before anything goes out, and keeps the case open until it is closed.
It remembers
What you discussed about a client last month is still there. Dictate a long ramble and it files the todos, people and decisions.
An expert on call
Ask for a security lead, a negotiator or a UX designer, and that persona works on your task.
What it does today, for real
- MemoryPicks up where others stoppedMoves into old notes and another assistant’s rules, and says what it found.
- MemoryA finance colleague, weekly closeKeeps the books current and holds open questions until I answer.
- On its ownKept open until closedA claim stays on its list, across sessions, until it is closed.
- WorkListings, buyers, follow-upsListings from photos, buyers answered by my rules, messages checked every morning.
- WorkWork at night, summary at breakfastBuilds overnight through review and release gates; reports at breakfast.
- Outside worldIt tells me when to bookChecks prices every day and messages me when it is worth booking.
- Outside worldA voice note, doneRecord a voice message on Telegram; it writes it out and does it.
- SafetyHow we run it ourselvesEight colleagues on four servers; none merges its own code.
- SafetyIt waits for your yesShows you on your phone what will go out, then waits.
- RunningA working colleague in minutesSet up on his own Windows computers, working within minutes.
- RunningA colleague that is always onKeeps track of what is open and due, around the clock.
- RunningHis own assistant before lunchSet up over coffee, then a step-by-step email to carry on alone.
What you need
No commands to learn: you talk to it like a colleague, and it runs the technical steps itself. It works with Google Calendar, Gmail, Sheets and Drive. Outlook and Microsoft 365 are not built in yet.
Free, plus a Claude plan
The software is free. You need a paid Claude plan, from $20/month (Claude Pro). It works while your computer is on, and you talk to it in Claude Desktop.
Claude’s pricesAdd a small server and Telegram
Rent a small server (a few euros a month) and install Telegram, a free messaging app like WhatsApp. Claude can walk you through it, or we set it up together. Then the morning message arrives even when your laptop is closed, and you reply from your phone, where it also shows you what will go out and waits for your yes.
Set it up together, $800
An hour of preparation, then an hour together online. You leave with your assistant running and know how to use it.
Krisztián Lipcsei, who builds MentatYour data
Where it lives
Its memory is a folder of plain notes on your computer, or on your server. You can read, change or delete any of it. Delete the folder and it is gone.
Who sees it
What you write to it, and what it reads to do the work (its notes and the files it opens), goes to Claude, as in any Claude chat, under your Claude plan’s terms. Before it sends an email, an invite or a shared file, it checks that it goes only to the people you approved.
Who it is for
It is one person’s assistant, not a company system with user accounts.
Install it yourself: paste three lines
Install the Mentat assistant for me in this folder. The steps are here: https://raw.githubusercontent.com/lipi4242/mentat-ai-bootstrap/v0.3.1/INSTALL.md Tell me each step before you do it.
Needs Claude Desktop or Claude Code on a paid Claude plan.
- 1Open the Code tab. In Claude Desktop, choose a new, empty folder.
- 2Paste the three lines. Claude says what it will do before each step, and asks before installing anything your computer is missing.
- 3Answer a few questions. From then on you talk to it in Claude Desktop, in that folder. With a server, on Telegram too.
Claude Code has the skills. Mentat makes it a colleague.
One that remembers you, acts on its own, works with your tools, and stays within the rules you set, wherever it runs.
| Area | Claude Code alone | With Mentat | Why it helps |
|---|---|---|---|
| Memory and knowledge | Claude Code aloneForgets between sessions, unless you write notes | With MentatRemembers you, your people, cases and decisions, as plain notes. Turns a long brain dump, even a dictated one, into todos, cases, people and decisions, for now and for later | Why it mattersYou never explain yourself twice. |
| Proactivity and scheduling | Claude Code aloneWaits for you to type | With MentatSends a morning summary and deadline reminders on a schedule, and keeps each open case on its list until it is closed | Why it mattersThings get noticed while you are away. |
| Work and projects | Claude Code aloneEach job starts from a blank page | With MentatCalls in an expert persona for the task, such as a security lead, a negotiator or a UX designer. Knows where a new project goes. Takes over an existing folder or an old assistant’s notes and tells you what it found. Runs big jobs by a set process, and can put a small web page online | Why it mattersYou get a specialist’s eye without hiring one. |
| Connection to the outside world | Claude Code aloneYou wire up each service yourself | With MentatGoogle Calendar, Gmail, Sheets and Drive, Telegram, and the web | Why it mattersIt works where your work already is. |
| Safety and control | Claude Code aloneA permission prompt per tool | With MentatAsks before it reaches outside its folder or does something risky, and blocks it when nobody is there to ask. Keeps your email address from third parties, and checks emails, invites and shared files against what you agreed before they go out | Why it mattersYou stay in charge without watching every step. |
| Operation and flexibility | Claude Code aloneOne session, in one place | With MentatRuns on your computer, on a server or in Claude’s cloud, several at once. The model can be swapped too | Why it mattersIt fits the way you work. |
The four pieces
Mentat is the name of the software. Thufir is the Mentat we run ourselves, and the name of this site.
One brain, many colleagues
The same assistant can run on your laptop, on a server and in Claude’s cloud at once. Each copy keeps to its own job, and they all share one memory.
See how it works