About

VERTEX is a VS Code extension that brings real-time cross-file Python analysis to your editor. Under the hood, it uses tree-sitter to parse your code into a concrete syntax tree (CST) and builds an incremental dependency graph from it — so it understands relationships across your entire project, not just the open file, and stays fast as you edit. It highlights how functions call and depend on each other as you navigate, and flags code that's no longer used anywhere in the codebase.

Key features

Tree-sitter powered parsing — builds a CST-based dependency graph that updates incrementally as you type, instead of re-parsing the whole project
Cross-file analysis — understands relationships across your entire Python project, not just the current file
Visual call-graph highlighting — callers shown in orange, callees in pink, directly in the editor
Smart dead code detection — flags unused functions with cross-file confidence, avoiding false positives
Inline statistics — CodeLens shows caller/callee counts above every function
Keyboard-driven navigation — lock onto a function and jump between callers/callees with Alt+] / Alt+[, across file boundaries

Use cases

Auditing a large or inherited codebase to find and safely remove dead code
Tracing how a function is used across modules before refactoring it
Onboarding onto an unfamiliar Python project by visually exploring call relationships
Cleaning up legacy code before a migration or major version bump