In addition to compiling the Brahma Sūtra, Bhagavān Veda Vyāsa documented the Bhagavad Gītā and classified the Veda into its present 4 categories. Hence He is considered a ṛṣi of the Veda / Vedānta.

Veda Vyāsa is considered to be an incarnation of Bhagavān Viṣṇu

Prasthāna Trayam comprises The Upaniṣads, Brahma Sūtras and The Gīta.

The Prasthāna-Trayam is meant for the intelligent seeker who desires relief from the three defects—abbreviated as BAD—of mundane goals and wishes to be free from the struggle of
becoming.

The enquiry that is made here is even before one enters into the study of Vedanta,

Pramānam means an Instrument of knowledge.

In the traditional learning framework of Śravaṇa (listening),
Manana (reflection), and Nididhyāsana(meditation), the phase of Manana is explicitly dedicated to questioning and achieving logical conviction.

The sense organs operate as the primary source (upajīvya pramāṇa) for their specific fields (e.g., eyes for forms and colors).

Manana is explicitly dedicated to questioning and achieving logical conviction.

Part of the Itihāsa Mahābharat, it attains an elevated status as smṛti because it contains Vedānta teachings presented in a simplified, easy-to-understand manner.