Module page 

File backed 16KB page manager with free list allocation. Page Manager: file-backed page storage with free list management.

Pages are 16KB fixed-size blocks used as the fundamental I/O unit. The page file layout:

• Page 0: file header (magic, version, page count, free list head)
• Page 1..N: data pages

Structs

Page

A fixed-size, 4KB-aligned page.

PageHeader

Fixed-layout page header stored at the start of every page.

PageId

A page identifier.

PageManager

Manages a file-backed page store with free-list allocation.

Enums

PageType

Page type classification.

Constants

HEADER_SIZE

Size of the page header in bytes.

PAGE_DATA_SIZE

Usable data bytes per page (total page size minus header).

PAGE_SIZE

Page size: 64KB to accommodate large embedding vectors and long content.