The drawings you can’t put on a vendor’s server.

• Reads specifications and CDs. Open a 200-page MasterFormat spec, a Construction Documents set, or a door, hardware, or equipment schedule, and get answers cited to the page.
• Drafts RFIs and submittal logs. Tracked-change drafts you accept or reject in Word, with the structural and MEP context already pulled in from the relevant CD sheets.
• Compares spec versions. See what changed between the 50% and 100% CD sets, or between the consultant’s spec and your redlined return.
• Drafts client correspondence. Letters to the owner, contractor, and consultant team, minutes from design reviews and OAC meetings, fee proposals, and scope-change letters.
• Anonymises before you share externally. Strip client names, address details, and project identifiers before sharing a case study, an award submission, or a portfolio piece. Muet saves a clean anonymised copy, and an audit file lists each redaction.
• Reads the code book. Apply the relevant zoning, IBC, ADA, or local code section to the project at hand. The code is public; the project file is not.

AIA Code of Ethics Rule 3.401 puts the duty of confidentiality squarely on the architect: members shall not knowingly disclose information that would adversely affect their client or that they have been asked to keep in confidence. The rule was updated in 2024 without softening on AI use, and the duty does not transfer to a vendor.

RIBA’s own 2025 AI Report shows 59% of architects now use AI, up from 41% the year before. The same report found that 86% are concerned about client confidentiality and AI. RIBA’s cybersecurity guidance is blunt: “When an architect is uploading data into an unregulated system, they generally don’t know what is going to happen with that data.” Government building drawings, masterplans for institutional clients, confidential urban-design studies, and pre-announcement campus work are the obvious examples.

• Reading and querying construction document sets.
• MasterFormat specification review and version comparison.
• RFI drafting with the relevant CD context already in scope.
• Schedule generation from drawings (door, window, hardware, equipment).
• Submittal log review and outbound submittal drafting.
• Owner-architect-contractor correspondence and meeting minutes.
• Government, defence, and institutional projects under classification or NDA.
• Award submissions and case studies, anonymised.

Autodesk shipped Assistant in Revit 2027 with an integrated MCP server that lets it operate directly on the BIM model. It is genuinely powerful, and it is also cloud-mediated: prompts and model context travel to Autodesk’s servers and, depending on the configuration, potentially on to Anthropic’s.

Muet sits next to the BIM authoring tool rather than inside it. Use Revit, AutoCAD, or ArchiCAD for the model, and Muet for the documents around it that shouldn’t leave your Mac.

For a small studio or solo practice, that is less than one consulting hour. For a mid-size firm it is a fraction of any per-seat cloud AI subscription, and the client’s drawings stay on the workstation where they were drawn.