---
title: "Data boundary reference"
description: "A compact matrix of what each Stellaris Companion surface reads, sends, and changes."
---

> Stellaris Companion documentation
> Complete index: https://galacticfilingcabinet.com/llms.txt

# Data boundary reference

| Surface | Reads | May send | May change |
| --- | --- | --- | --- |
| Save ingestion | Local `.sav` files | Nothing by default | Local parsed archive |
| In-app Advisor | Extracted context | Prompt and context to selected provider | Advisor memory/cache |
| In-app Chronicle | Extracted events and cached prose | Prompt and context to selected provider | Local Chronicle cache |
| MCP Relay read tools | Local extracted archive | Structured context to connected local client | Nothing |
| MCP Chronicle write tools | Draft plus local Chronicle | Nothing by themselves | Local Chronicle cache after explicit intent |
| Published Chronicle | Approved story content | Public website | Public story record |

No listed surface writes to a Stellaris `.sav` file.

Source: https://galacticfilingcabinet.com/docs/reference/data-boundary/index.mdx