Right, so the way the Inform 7 template gets around that is by turning the storyfile into a JS file. But for TADS there’s the additional issue that Parchment’s ES modules and WASM files need the correct MIME type headers to be sent by the server or else the browser won’t run them. And there are ways around that (see Parchment’s single file build), but it’s not turned into a reliable solution like the Inform 7 templates yet. This is the first request for game-specific TADS in Parchment I’ve seen so far.
And scripts like ifsitegen.py could be updated to support TADS. But they haven’t been yet.