Safety and privacy
This page spells out what the AI assistant can and cannot do in Revit, which data leaves your computer and which stays.
BimSpeed AI is in testing. Try it on a copy of the model before using it on real work.
Writing to the model always needs your approval
- By default the pane is on Read only: the assistant only looks at the model. Every write is blocked, and the assistant is told so it can remind you to change the access level.
- On Edit model, before every write command (create rebar, create a grid, create drawings...), the pane shows a card titled The agent asks permission to run with the tool name and parameters. Revit does nothing until you press Allow.
- Deny leaves the model unchanged.
- Sensitive actions (deleting or editing existing elements, running C# code) always ask each time; there is no Always allow this session button.
- Running C# code exists only at the Advanced level, and still needs your approval.
- Preview and dry-run tools do not change the model, so they do not ask.
- Write commands created by BimSpeed can be undone with Revit's Undo.
See how to approve in Using the BimSpeed AI pane.
The assistant has a small toolset
| The assistant has | The assistant does not have |
|---|---|
| BimSpeed tools on the open model | Access to other models that are not open |
| Reading and writing files inside the Brain folder | Reading or writing files outside the Brain folder |
| Searching the files of the Brain folder | Write access to the model before you approve |
No shell commands. With Claude Code and Antigravity, the pane gives the assistant no command-running tool, no browser and no sub-agents.
Codex has a built-in PowerShell command tool that BimSpeed cannot turn off. The pane reduces the risk by running Codex in a sandbox: on Read only the sandbox allows reading only; on other levels it allows writing only inside the working folder. A command that needs to go outside the sandbox shows a permission card like any other action. If you need an absolute guarantee of "no commands", choose Claude Code or Antigravity.
Files are limited to the Brain folder
The assistant may only read and write files in the Brain folder (and the model's project folder inside it). It uses it to read notes, look up documents and save reports. With Claude Code and Antigravity it cannot read your .rvt files, other files on the computer or your personal folders (Codex: see the note above).
Consequence: do not keep files in the Brain folder that you do not want to send to the AI provider, because when the assistant reads a file its contents go into the chat.
What data is sent to the AI provider
BimSpeed AI has no AI of its own. The tool you choose (Claude Code, Codex or Antigravity) runs on your computer and calls its provider (Anthropic, OpenAI or Google) with your account. What passes through:
| Data | Notes |
|---|---|
| The messages you type | Includes the current selection and active view if you use /context |
| Model data that tools return | For example element names and IDs, types, levels, parameters, counts, material quantities, rebar; and images of views or sheets if the assistant calls a capture tool |
| Contents of files the assistant reads in the Brain | PROJECT.md, memory.md, documents in knowledge, skills, AGENTS.md |
| The assistant's answers and reasoning | Part of the chat |
The assistant only sees the data that tools return for your question, not the whole model. Even so, ask only for what you are comfortable sharing.
If a contract or company policy forbids giving project data to an external AI service, do not use BimSpeed AI on that project. How a provider stores and uses data depends on your account type and settings; read the policy of Anthropic, OpenAI or Google as applicable. Business accounts (Team, Enterprise, Business) usually have their own terms; ask your administrator.
Where chats are stored
- On your computer, in the Brain folder: each chat is written to
projects\<model>\chats, next tomemory.mdandoutputs. This is your data: deleting files in this folder deletes the local copy. - The AI tool may keep its own history according to that tool's settings.
- Antigravity: the pane's chats also appear in
agy's own history on your computer, in the same place as theagysessions you run yourself. - Claude Code and Codex: may keep session records in their own way. See the tool's documentation for where they are stored and how to delete them.
- Antigravity: the pane's chats also appear in
The pane does not touch your configuration
- The pane does not modify the configuration files of Claude Code, Codex or Antigravity.
- MCP servers you configured in the AI tool are not loaded into the pane's chats; the assistant only uses BimSpeed tools.
- Open chats stop when you close Revit; BimSpeed cleans up the AI tool processes the pane started.
Your responsibility
BimSpeed AI helps you operate; it does not replace an engineer. The assistant does not perform structural calculations or design review. Before you use a result (especially rebar that was created, bar lengths, splice positions and anchorage), check it in Revit and against the design standards that apply.