server.py builds an opaque dict at submission time from extra_data and pins
it on PromptServer.active_prompt_metadata while main.py's worker drives the
prompt. send_sync spreads the dict's key/value pairs onto outgoing payloads
so frames carry whatever tags the submission attached (today: workflow_id).
The mechanism is intentionally untyped — the transport layer doesn't know
what workflow_id means or treat any key specially. Adding a new propagated
field requires only a one-line addition in post_prompt; execution.py and
comfy_execution/progress.py are not touched.
execution.py changes: 0 lines.
After a frontend update (e.g. nightly build), browsers could load
outdated cached index.html and JS/CSS chunks, causing dynamically
imported modules to fail with MIME type errors and vite:preloadError.
Hard refresh (Ctrl+Shift+R) was insufficient to fix the issue because
Cache-Control: no-cache still allows the browser to cache and
revalidate via ETags. aiohttp's FileResponse auto-generates ETags
based on file mtime+size, which may not change after pip reinstall,
so the browser gets 304 Not Modified and serves stale content.
Clearing ALL site data in DevTools did fix it, confirming the HTTP
cache was the root cause.
The fix changes:
- index.html: no-cache -> no-store, must-revalidate
- JS/CSS/JSON entry points: no-cache -> no-store
no-store instructs browsers to never cache these responses, ensuring
every page load fetches the current index.html with correct chunk
references. This is a small tradeoff (~5KB re-download per page load)
for guaranteed correctness after updates.
