According to the Kalpa Sūtra:

• Core content: It is a Śvetāmbara text that mainly preserves the biographies (jīvan charitra) of the 24 Tirthankaras, with particular emphasis on Mahāvīra. It also includes rules for monastic conduct (especially during the rainy-season Chaturmas) and the genealogies of Jain teachers (the sthāviravali). The work is considered to have been compiled by Acharya Bhadrabahu around the 3rd century BCE and later codified in the Śvetāmbara tradition. It is traditionally recited during Paryuṣaṇā as a living guide to vows, discipline, and the path of renunciation. ( jainknowledge.com)

• Major differences between traditions:

- Śvetāmbara view: Kalpa Sūtra is a canonical and foundational text; it provides the official lineage and life-stories that many followers memorize and recite. - Digambara view: Kalpa Sūtra is not regarded as canonical in the same way, and some of its details about lineage and certain biographies are not accepted in their tradition. The two sects differ on certain personae (e.g., who is listed in certain post-Mahāvīra lineages and the gender of earliest teachers in some lines). ( en.wikipedia.org)

• Practical takeaway for adherents:

- The Kalpa Sūtra serves as a biographical and monastic manual: it inspires renunciation, discipline, non-violence, and the practice of vows (niyamas) and ritual observances, especially during festival periods like Paryuṣaṇā. ( jainknowledge.com)

If you’d like, I can point you to a specific Kalpa Sūtra passage or summarize a particular Mahāvīra life episode as it appears in the text. You can read more here and here