Sigillion-AI/sigillion

> Remember everything. Read almost nothing. Prove all of it.
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Sigillion is memory for AI agents, made by Steddy Nova SRL. It keeps the whole record of what an agent and a person did,
word for word, on your own computer; compressed, so that a model can skim weeks of work in a few hundred tokens and open
the full text only where it needs it; sealed, so that every record can be checked to show it was not altered. No
telemetry: Sigillion itself sends nothing anywhere. What it hands the agent becomes part of your session, which Claude
Code sends to Anthropic and Cursor to the models it uses, as each does with the rest.
## One engine, in order
1. Claude Code and Cursor first. Today Sigillion works in Claude Code and in Cursor: every session is kept after
compaction and after Claude Code deletes its transcripts. Claude searches and reopens its own history while it works.
Both agents keep their sessions in one store on your computer: in the same project, Cursor's agent can recall what
Claude Code did. Claude can recall what you did in Cursor. Claude Code is where every feature is built, measured
and proved on real work. It is the first step, not the whole idea.
2. Every AI model and agent tool next. The engine does not depend on one model. The same sealed memory will sit under
other models and the tools people already use (coding agents, agent frameworks, assistants), with an SDK for anyone
who builds agents.
3. Then the fields where the record must stand: legal and finance. The same store, with a pack for each field: its
citations and terms, its redaction rules and receipts that show what the model did and when, for work a client, a
regulator or a court may ask about.
Each step comes after the one before has proved itself with other people's numbers, not before.
## Install
Sigillion 0.1.3 is on PyPI. It fixes sessions that could stop saving at a Windows path. 0.1.2 added the Mac with
Apple silicon; 0.1.1 added Cursor and took the trial out. What each release changed: CHANGELOG.md.
You need:
Windows or Linux on a 64-bit Intel or AMD processor (x86_64); or a Mac with Apple silicon (M1 or later) and macOS 11
or later. Not yet: a Mac with an Intel processor, Windows on ARM, ARM Linux, Alpine Linux.
Python 3.10 to 3.14. Python 3.15 needs a C compiler until zstandard, which Sigillion uses, publishes a package for
it; with 3.14 installed beside it, pipx install --include-deps --python 3.14 sigillion needs none (on Linux with
a pipx older than 1.6: --python python3.14).
Claude Code 2.1.287 or later. To update it: claude update; installed with WinGet:
winget upgrade Anthropic.ClaudeCode; installed with Homebrew: brew upgrade claude-code.
Or Cursor (measured on Cursor 3.27 on Windows).
pipx, then a new terminal:
Windows: py -m pip install --user pipx, then py -m pipx ensurepath.
Ubuntu 23.04 or later, Debian 12 or later: sudo apt install pipx, then pipx ensurepath.
Other Linux: python3 -m pip install --user pipx, then python3 -m pipx ensurepath.
macOS: brew install pipx, then pipx ensurepath.
Anything else: pipx's installation page.
Then the commands: