viv vs VR.org VR / AR / XR Reader
viv is a plugin bundle for AI coding tools published by siftystudio. Marketplaces we read that list it: 1 (Claude Code: claude-plugins-community). VR.org VR / AR / XR Reader is an MCP server published by vr.org. Marketplaces we read that list it: 1 (Official MCP Registry). As of our marketplace pass on 2026-10-21. This pair was picked by a reader, not by our comparison rule, so search engines are asked not to index the page.
Where each is published
| Marketplace |  viv |  VR.org VR / AR / XR Reader |
|---|---|---|
| Claude Code: claude-plugins-community | Listed Version: 0.12.0 Forks (GitHub): 3 Stars (GitHub): 39 Not marked · First seen |
Not listed |
| Official MCP Registry | Not listed | Listed Version: 0.4.4 Downloads/month (npm): 1 614 Downloads/week (npm): 370 Forks (GitHub): 0 Stars (GitHub): 0 Not marked · First seen |
Each figure is the marketplace's own and is never added up across marketplaces. A marketplace that publishes no figure shows none: no number is not zero.
The facts side by side
| Fact | viv | VR.org VR / AR / XR Reader |
|---|---|---|
| Marketplaces that list it | 1 | 1 |
| Stars (GitHub) (differs) | 39 (better) | 0 (worse) |
| Forks (GitHub) (differs) | 3 (better) | 0 (worse) |
| Last release (differs) | Not published | 2026-10-13 |
| Where it runs (differs) | Installs as a plugin bundle | On your machine (vr-org-mcp) |
| Transport (differs) | Not stated | stdio |
| Tools it declares | Not published | Not published |
| Environment variables it asks for | Not published | Not published |
| Hooks it runs (differs) | 3 | Not published |
| Parts of the bundle (differs) | 11 | Not a bundle |
| Licence (differs) | SEE LICENSE IN LICENSE.txt | Not stated |
| Repository (differs) | github.com/siftystudio/viv | github.com/evanatpizzarobot/vr-org-mcp |
| Changes in the last 7 days | 0 | 0 |
| First seen (differs) | 2026-10-12 | 2026-10-11 |
Lines where the two differ have a tinted background and bold values. Where the data itself says which value is better (more marketplaces, a larger figure of the same marketplace, a fresher release, a verified mark on a marketplace that lists both), the better one is also marked green with ▲ and the worse one red with ▼. Where it runs, the transport, the tools, the settings, hooks, the bundle's parts, the licence and the week's changes are marked only as different: more or fewer is not better in itself.
What each says it does
viv
Turn Claude into a Viv expert. Design, develop, and debug code and content for Viv, a system for building simulated worlds where storylines emerge from character activity. Viv offers technical narrative designers a custom programming language affording rich specifications of character actions, as well as constructs that drive *story sifting*—the task of identifying emergent storylines in a given simulation instance, such as a videogame playthrough. This plugin maintains a synced copy of the Viv codebase, and bundles special commands for efficiently navigating it, allowing Claude to search the full language reference, compiler source, runtime source, and other material anytime it needs to look something up. Skills include `/setup` for fully automated Viv installation and project setup, `/write` for authoring Viv code from a brief, `/fix` for diagnosing compiler and runtime errors, `/design` for worldbuilding and architecture planning, and `/build` for writing integration code.
VR.org VR / AR / XR Reader
Read-only VR / AR / XR news, full-text editorial, events, deals, and buyer guides from VR.org.
How to run each
viv As a Claude Code plugin
/plugin marketplace add anthropics/claude-plugins-community
/plugin install viv@claude-communityVR.org VR / AR / XR Reader As a local MCP server: npm package
claude mcp add --transport stdio vr-mcp -- npx -y vr-org-mcpCommands built only from what the marketplaces declare; the full set for every client is on each card.
Tools each declares
Neither one's marketplaces publish a list of tools, so there is nothing to compare.
Settings each asks for
Neither one's marketplaces publish the settings it asks for.
What it can do: viv · What it can do: VR.org VR / AR / XR Reader · Compare two other plugins
Data comes from the public marketplace file https://github.com/anthropics/claude-plugins-community/blob/HEAD/.claude-plugin/marketplace.json. Data comes from the Official MCP Registry (registry.modelcontextprotocol.io), CC0 1.0. Figures come from our own regular passes over the marketplaces, last read on . We publish no contact details for plugin publishers.