Answer

There is no single universally agreed “first official scripture” in Jainism.

If you mean the earliest and one of the most important canonical Jain texts, then the Ācārāṅga Sūtra is commonly regarded as one of the oldest Jain scriptures in the Śvetāmbara tradition.

Explanation

• Jain scriptures are generally called the Agamas.
• In the Śvetāmbara tradition, the Ācārāṅga Sūtra is the first of the 12 Angas and is highly revered.
• It teaches the life of a monk, non-violence, discipline, and detachment.
• In the Digambara tradition, the original Agamas are not accepted in the same way, so the idea of one “official first scripture” is not shared in exactly the same form.

Spiritual Understanding

The Ācārāṅga Sūtra is important because it reflects the core Jain path:

• Ahimsa — non-violence
• Aparigraha — non-attachment
• Self-discipline
• Right conduct

It is deeply respected because it shows how a Jain seeker should live with purity and awareness.

Takeaway

If you want the simplest answer: Ācārāṅga Sūtra is often considered the earliest and most foundational Jain scripture.