Next.js / React

When working with Next.js or React, LLMs often struggle with Server Components vs. Client Components, or routing structure. ContextOS natively parses TSX/JSX and resolves imports across the app router.

Example Query:
contextos query "How is the user authentication state passed from the root layout to the dashboard page?"

Result: ContextOS will extract the layout.tsx, trace the AuthProvider import, pull the context definition, and extract the useAuth() hook usage inside dashboard/page.tsx.

Node.js / Express

In monolithic Express apps, routes often depend on dozens of middleware and controller files.

Example Query:
contextos query "What middleware is executed before the POST /api/checkout route?"

Result: ContextOS finds the route definition, runs graph expansion on the route handler array, and retrieves the AST chunks for the specific middleware functions (e.g. verifyStripeSignature, rateLimiter) without returning the entire 2,000-line middleware.ts file.

Python (FastAPI / Django)

ContextOS fully supports Python AST parsing via Tree-sitter. It perfectly understands class inheritance and decorators.

Example Query:
contextos query "Where is the User model defined and what fields does it have?"

Result: ContextOS uses exact symbol matching to locate class User(models.Model) and returns only that chunk, stripping out the rest of the models.py file.

Go (Golang)

Go projects often have hundreds of small files in a single package. ContextOS handles Go's implicit package-level visibility natively.

Example Query:
contextos query "Show me the implementation of the ProcessQueue goroutine."

Result: ContextOS returns the ProcessQueue function, and through Graph Expansion, pulls in the struct definitions for any channels or mutexes it operates on.