Page Structure: From Logical Trees to Raw Bytes

Hello, I'm Maneshwar. I'm working on git-lrc : a Git hook for Checking AI generated code. AI agents write code fast. They also silently remove logic, change behavior, and introduce bugs -- without telling you. You often find out in production. git-lrc fixes this. It hooks into git commit and reviews every diff before it lands. 60-second setup. Completely free. You already know that a SQLite database file is divided into fixed-size pages . Every structural concept we’ve discussed B+-trees, internal nodes, leaf nodes, overflow chains ultimately lives inside these pages. The tree module manages all of them. Each page is one of the following: A tree page (internal, leaf, or overflow) A free page Or, in special cases, a lock-byte or pointer-map page The free pages themselves are not scattered randomly. They are organized into a single trunk list , as shown in the following figure: This trunk list allows SQLite to recycle unused pages efficiently. When nodes split or merge, or when tables ar