Suggestion: GuideLines?

[MasterJames]

I was hopeful there was a way to also select a set of guidelines from a GreasePencil object.
Or maybe there's a way that opens the instance of InstantMeshes so you can put guidelines, so it handles the steps of export and import?
Maybe even just set the symmetry axis so it gets one guideline down the middle.
[My guess is neither was not possible, or maybe grease pencil was only annotations at the time you first build this bridging addon.]

https://igl.ethz.ch/projects/sketch-retopo/

Found CLI --help

Options:
-o, --output Writes to the specified PLY/OBJ output file in batch mode
-t, --threads Number of threads used for parallel computations
-d, --deterministic Prefer (slower) deterministic algorithms
-c, --crease Dihedral angle threshold for creases
-S, --smooth Number of smoothing & ray tracing reprojection steps (default: 2)
-D, --dominant Generate a tri/quad dominant mesh instead of a pure tri/quad mesh
-i, --intrinsic Intrinsic mode (extrinsic is the default)
-b, --boundaries Align to boundaries (only applies when the mesh is not closed)
-r, --rosy Specifies the orientation symmetry type (2, 4, or 6)
-p, --posy Specifies the position symmetry type (4 or 6)
-s, --scale Desired world space length of edges in the output
-f, --faces Desired face count of the output mesh
-v, --vertices Desired vertex count of the output mesh
-C, --compat Compatibility mode to load snapshots from old software versions
-k, --knn Point cloud mode: number of adjacent points to consider
-F, --fullscreen Open a full-screen window
-h, --help Display this message

Well I guess there's not way currently to send guide curls from the command line?!

[MasterJames]

I have made the suggestion further up now as well.
wjakob/instant-meshes#136

[jayanam]

Well my interface from the addon to instant meshes is command line. If there is an option to add guidelines we dont need grease pencil, I could add a feature to my addon to paint guidelines onto the mesh, no problem. But as I said, we need guidelines as cml interface to IM.