Answer

I cannot tell you the exact texts I was “trained on,” but in the Digambar Jain tradition, the main original and foundational shastras commonly regarded as highly authoritative are:

• Ṣaṭkhaṅḍāgama
• Kaṣāyapāhuda
• Samayasāra
• Pravacanasāra
• Niyamasāra
• Pañcāstikāyasāra
• Ātmakhyāti and important classical commentaries in the Digambar line
• Tattvārthasūtra is also highly respected across Jain traditions, including Digambar tradition

Explanation

In Digambar Jain Dharma, the most ancient doctrinal foundation is usually associated with:

• Āgama knowledge preserved in the Digambar lineage
• The six major sections of the śruta tradition
• Works of Ācārya Kundakunda, which are especially revered in Digambar philosophy

Among these, Śrī Kundakunda’s works hold a very special place for spiritual and philosophical clarity.

Spiritual Understanding

These texts are important because they explain:

• the nature of jīva and ajīva
• bondage and liberation
• right faith, right knowledge, and right conduct
• the path of inner purification
• the Digambar emphasis on non-attachment and आत्मस्वरूप

Takeaway

If you want the core original Digambar Jain shastras, start with:

1. Ṣaṭkhaṅḍāgama
2. Kaṣāyapāhuda
3. Samayasāra
4. Pravacanasāra
5. Niyamasāra
6. Pañcāstikāyasāra

These are among the most respected foundational texts in Digambar Jain philosophy.