Add tags to an issue based on the stack trace

My team is trying to configure Sentry to group errors by product area and assign them to engineers working on each product. We intend to identify product area based on the stack trace of the error.

Our Javascript code is minified, so we cannot get a usable stack trace until Sentry applies source maps. However, source maps are applied after custom tags are applied by Raven.

What we’re wondering is, is there some way to apply custom tags to an error after source maps have been applied, and a useful stack trace is available? If not, does anyone have any advice on how to filter these errors from the trace?