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**DOSSIER**\
2026

a rhino plugin for early-phase architectural design. walls, doors, windows, slabs, stairs, levels, and a 2d drawing layer that feels like a 2d drawing layer. native rhino objects, no parallel database to sync. what exists is either expensive proprietary software, or full bim systems built for office-scale documentation phases that don't fit how you actually think during a sketch. open source bim tools live in blender or freecad and follow a 3d-first logic — useful, but not how you 2d draw a plan. students and small offices end up either paying, pirating, or working around in plain rhino. dossier is the tool i wanted to use myself during my master's and my own work. why rhino and not a fully open source cad? rhino sells perpetual licences you actually own instead of subscriptions you rent, and its file formats (3dm, opennurbs) and apis (rhinocommon, eto.forms) are well documented and readable outside the application. that's not free software, but it's a workable position on ownership and open data and where some architects already work. freecad or librecad would be more philosophically open, but adoption in architecture is marginal. dossier meets the discipline where it is. open data, established community, enough infrastructure to build on.

[repo](https://dossier.openbureau.ch)
