There's your loop: two settings, and the Agent keeps editing the one that isn't used.
Flask only uses what ends up in app.config last. Find the order in app.py: if it does app.config.from_object(Config) and then sets app.config['MAX_CONTENT_LENGTH'] = 16 * 1024 * 1024, the 16MB wins. Delete one of the two, keep a single setting (e.g. 50MB in config.py).
About the loop in general: when an agent says "fixed" twice and it isn't, stop prompting and give it evidence instead of the complaint. Something like:
The error is still 413. There are two MAX_CONTENT_LENGTH settings, app.py:14 and config.py:8. Remove the one in app.py. Do not change anything else.
Specific file + line + what to do costs one checkpoint instead of seven.
MAX_CONTENT_LENGTHanywhere in the code? olu_backend · edited