The Mañjuśrī-mūla-kalpa is text of the class designated as Kriyā

Kriya

Kriya most commonly refers to a "completed action", technique or practice within a yoga discipline meant to achieve a specific result. Types of kriya may vary widely between different schools of yoga. Another meaning of Kriya is the outward physical manifestations of awakened kundalini...

-tantra

Tantra

Tantra , anglicised tantricism or tantrism or tantram, is the name scholars give to an inter-religious spiritual movement that arose in medieval India, expressed in scriptures ....

. It is closely aligned and identified with the bodhisattva

Bodhisattva

In Buddhism, a bodhisattva is either an enlightened existence or an enlightenment-being or, given the variant Sanskrit spelling satva rather than sattva, "heroic-minded one for enlightenment ." The Pali term has sometimes been translated as "wisdom-being," although in modern publications, and...

 Mañjuśrī

Manjusri

Mañjuśrī is a bodhisattva associated with transcendent wisdom in Mahāyāna Buddhism. In Esoteric Buddhism he is also taken as a meditational deity. The Sanskrit name Mañjuśrī can be translated as "Gentle Glory"...

.

This Mañjuśrī-mūla-kalpa is often cited as the earliest example of an extant Indian Buddhist Tantra

Vajrayana

Vajrayāna Buddhism is also known as Tantric Buddhism, Tantrayāna, Mantrayāna, Secret Mantra, Esoteric Buddhism and the Diamond Vehicle...

. Some scholars identify it as a compilation of a core dated circa 6th century with accretions and additions.

The Sanskrit version, significantly longer than its corresponding Chinese and Tibetan renderings, is still extant.