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+# Proposal: LiteCADViewer as a lightweight CAD companion
+
+Status: proposed community contribution; requires maintainer review. This document
+neither adds an official Craft App nor authorizes a new download source.
+
+## Contributor and provenance
+
+- Maintainer: [Dennis-pan (@Dennis-pan-x)](https://github.com/Dennis-pan-x).
+- Source: [Dennis-pan-x/LiteCADViewer](https://github.com/Dennis-pan-x/LiteCADViewer).
+- The repository was created on 2026-10-19 as a fork of `storytold/cadcraft`.
+  Its default branch is now a standalone viewer; original history and the
+  CADCraft upstream branch remain available. This is a new community project.
+- Windows previews are unsigned portable ZIPs. SHA-256 checksums provide
+  integrity checks, not independent publisher authentication.
+- [Provenance](https://github.com/Dennis-pan-x/LiteCADViewer/blob/main/docs/provenance.md)
+  and [licenses](https://github.com/Dennis-pan-x/LiteCADViewer/blob/main/THIRD-PARTY-LICENSES.txt)
+  preserve the original CADCraft authorship. The workspace uses MIT OR Apache-2.0;
+  unmodified acadrust retains its MPL-2.0 notices.
+
+## Why a separate viewer
+
+For someone reviewing a drawing, the useful first action is opening the file and
+panning or zooming, without loading editing commands and constraint solving.
+LiteCADViewer reuses nine CADCraft core crates for reading and rendering, with a
+small native Rust/egui frontend. It does not include the CADCraft editing engine,
+constraint solver, editor UI or MCP service. It has no source-file save command.
+
+The current preview provides DWG/DXF viewing, pan and zoom, fit view, layer
+visibility, measurement and PDF export. It uses GPU geometry rendering
+with a CPU fallback. The interface and project documentation are English.
+Its original cyan peregrine-falcon icon is separately licensed; it does not
+reuse the ArtCraft logo or the CADCraft application icon.
+
+## Review the existing application
+
+- [Windows x64 previews and SHA256SUMS.txt](https://github.com/Dennis-pan-x/LiteCADViewer/releases/latest).
+- [User guide](https://github.com/Dennis-pan-x/LiteCADViewer/blob/main/docs/usage.md).
+- [Validation and limitations](https://github.com/Dennis-pan-x/LiteCADViewer/blob/main/docs/validation.md).
+- [Native screenshot](https://github.com/Dennis-pan-x/LiteCADViewer/blob/main/docs/images/viewer.png).
+- [Existing CADCraft viewer code contribution](https://github.com/storytold/cadcraft/pull/1606).
+- [Launcher discussion](https://github.com/storytold/craft-launcher/issues/623).
+
+The synthetic DWG checks use files produced by CADCraft's own converter. They do
+not establish independent DWG compatibility. SHX/big fonts, proxy/custom objects,
+complex layouts and 3D need independent drawing checks. Published runtime
+acceptance currently covers Windows x64 only. Navigation timings on one computer
+are not a general performance or startup-speed guarantee.
+
+## Decision requested from maintainers
+
+Please consider whether a lightweight read-only CAD companion belongs in the
+community roadmap, and whether the preferred home is CADCraft or a separate app.
+The existing implementation and its original icon are available for review.
+
+The launcher's current policy permits installation from `storytold/` repositories
+only. This proposal preserves that boundary: no catalog entry, download-host
+exception, installer execution or installation path is introduced. A listing
+must not point the current installer at the community ZIP.
+
+If maintainers want to adopt the application, follow-up work would need their
+explicit choice of repository ownership, approved distribution, package and
+asset naming, release-checksum verification, update/uninstall behavior, and
+platform support. The public identity must distinguish a community proposal
+from an accepted official Craft App until that decision is made.