Where Is Abhidhamma In 1st Saṇggāyanā

Sariputta and his students is the memorizers of abhidhamma. So It is nothing amazing.
Sariputta is second only to buddha, in teaching (Buddha declared in AN.Ekakanipāta.Ekapuggala). So the ancient commentary at first sangayana have many abhidhamma.

In mahāgosiṇghasālasutta and saṇgītisutta, also let us know that every memorizers, upali (Vinaya), ananda (DN), sariputta's student(MN), mahakassapa (SN), anuruddha (AN), in 1st saṇggāyanā, often go to listen sāriputta.

That is the answer of :

1. "Why we see many abhidhamma in sutta of sariputta?",
2. "Why parivāra of upāli have paṭṭhāna?",
3. "Why mahakassapa declared 'don't edit/add anything into buddha's pannatti', in 1st saṇggāyanā?",
4. "Why commentary often said 'dīghabhāṇaka said... but majjhimabhāṇaka said...'?",
5. "Why buddhaghosācāra said 'atthappakāsanatthaṃ, aṭṭhakathā ādito vasisatehi;pañcahi yā saṅgītā, anusaṅgītā ca pacchāpiฯ' and 'samayaṃ
6. avilomento, therānaṃ theravaṃsapadīpānaṃ; sunipuṇavinicchayānaṃ, mahāvihāre nivāsīnaṃฯ hitvā punappunāgatamatthaṃ, atthaṃ
7. pakāsayissāmi; sujanassa ca tuṭṭhatthaṃ, ciraṭṭhitatthañca dhammassaฯ'"?
8. Etc.

Abhidhamma is sāriputta's literal. He is not "the best in memorizing, such as ānanda", but buddha said "he is second only to buddha, in teaching".

So, It is nothing amazing, that abhidhamma literal is difference from sutta, because of "it is sāriputta's literal. It is not ānanda's".

Another, abhidhamma is in 1st saṇgayanā by sāriputta's students, that included ānanda ,kassapa, anuruddha, upāli (mahāgosiṇghasālasutta and saṇgītisutta).

This reply is compatible with sutta, more than anti-abhidhammist's comment.