Unlocking the Power of the Dependency Graph

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Node.js applications are increasingly defined by their dependency graph, yet most tooling still treats it as an opaque side effect. node_modules hides structure, workspaces are layered on, and understanding how dependencies relate (or even why they exist) remains surprisingly difficult.

This talk introduces the vlt client and shows what becomes possible when the dependency graph is treated as a first-class JavaScript artifact. By exposing graph construction, resolution, traversal, and querying as reusable JavaScript primitives, vlt enables both powerful CLI workflows and entirely new classes of programmatic tooling. Building the client in JavaScript ensures that advances in package management feed directly back into the ecosystem, strengthening the shared library corpus and raising the ceiling for Node.js tooling.

This talk has been presented at Node Congress 2026, check out the latest edition of this JavaScript Conference.

FAQ

The main focus of Rui Adorno's talk is on unlocking the power of the dependency graph and demonstrating how to leverage it using the Vault client.

Rui Adorno is a founder engineer at Vault and has previously worked at NPM Inc., GitHub, and Google. He has extensive experience in the Node.js package management space.

Dependency Selector Syntax (DSS) is a query language based on CSS selectors that allows users to query and manage the dependency graph of a JavaScript project.

DSS helps in managing dependencies by allowing users to query the dependency graph using CSS-like selectors, enabling them to filter and select packages based on various attributes like name, version, author, and security metadata.

VLT introduces two phases for package installation: Phase one involves downloading and extracting packages without executing lifecycle scripts, and phase two involves building selected scripts using dependency selector syntax for targeting.

VLT improves security by blocking all install scripts by default, allowing users to inspect the dependency graph and check for security issues before any code runs, thus preventing potentially malicious scripts from executing automatically.

Yes, DSS can be expanded to query across multiple projects using the host local selector, allowing users to target all configured projects in their system.

AI agents can benefit from a queryable dependency graph by receiving structured data instead of crawling files, resulting in faster and more efficient access to machine-readable output and rich metadata.

Users can use VLT's pkg command to add new properties to package.json files, such as adding dependencies or scripts, across all or selected workspaces within a project.

A dependency graph in JavaScript is a data structure that represents the dependencies of a project. It is created when a package manager resolves dependencies during installation.

Ruy Adorno
Ruy Adorno
19 min
26 Mar, 2026

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Video Summary and Transcription
Rui Adorno emphasizes the power of dependency graphs in JavaScript projects, highlighting the underutilized graph structure and the importance of understanding metadata. The discussion delves into advanced dependency selector syntax, integrating query language with VLT client for updates and additions, running tests, and updating versions. The exploration of VLT client features includes secure package installs, phased installation processes, and DSS capabilities. Multi-project package filtering is expanded through DSS query language with a host local selector for benefits like script inspection and AI agents.
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