31b8e6139ed931f5360aa13dc1b2be98cb3349c0 and 91da780fa155709ea0d3eff5266f673dc6f96851 also improve this behavior
couple of things remain:
[x] fs.stat to see if the module has already be installed in the client's sandbox
[x] diff cache and incoming to figure out what modules are new - new modules should be immediately resolved so that a "not found" can be returned as close to the start of processing as possible
31b8e6139ed931f5360aa13dc1b2be98cb3349c0 and 91da780fa155709ea0d3eff5266f673dc6f96851 also improve this behavior
couple of things remain:
fs.statto see if the module has already be installed in the client's sandbox