ComfyUI writes its prompt with Python's default json.dumps, so a node whose
IS_CHANGED returns float("nan") saves "is_changed": [NaN] in every PNG. The
exact-pair ingestion stored the snapshots with allow_nan=False, so the scan
failed those files ("Out of range float values are not JSON compliant: nan")
and the monitor dropped their link. The legacy pages replaced NaN with null
before JSON.parse and ingested them.
- utils/json_strict.dumps_strict: strict JSON with non-finite numbers as
null; identical bytes for every other value.
- Pair snapshots and provenance, and the plain prompt link, store strict
JSON (the legacy link wrote bare NaN into the database).
- The browser-parser scan fallback parses records as the legacy pages do
(parse_page_json), so a graph with NaN still traces its prompt.
- The prompt images route answers strict JSON instead of regex-replacing
"NaN" (which also rewrote prompt text such as "ratio: NaN"); the NaN
cleaners also null Infinity.
Prompt text and its hash are unchanged: only numbers become null.
Vito Sansevero
58a4026a99