plugin

viv — Claude Code plugin: built-in Viv expert

Q: How do I install viv in Claude Code?

Add the marketplace first: `/plugin marketplace add anthropics/claude-plugins-community`. Then install the plugin: `/plugin install viv@claude-community`. Restart your Claude session afterwards, since the plugin only loads on a fresh start.

Makes Claude fluent in Viv, the system for building simulated worlds where stories grow out of what characters do.

Install into Claude Code · Plugin marketplace All methods and platforms ↓

/plugin marketplace add anthropics/claude-plugins-community
/plugin install viv@claude-community

Open on GitHub

What viv does

The plugin keeps a local, synced copy of the Viv codebase — language reference, compiler source, runtime source. Bundled commands let Claude search that copy whenever a question comes up, so answers rest on the actual code rather than guesswork.

The skills cover the whole loop. /viv:setup installs the compiler and runtime and configures your environment. /viv:write turns a brief into Viv code and compiles it before showing you. /viv:fix diagnoses compiler or runtime errors. Rounding it out: /viv:design for worldbuilding and architecture, /viv:build for host adapters and test harnesses, plus /viv:critique, /viv:study and /viv:ask. Skills are global; invoke them as /viv:ask or the short /ask.

You need Claude 2.1.85 or newer and Git 2.25 or newer. The utility commands are bash scripts, and they misbehave under native Windows shells, so on Windows run Claude inside WSL 2. After installing, restart the session completely — /reload-plugins won't bring the plugin up.

What it helps with

install the Viv compiler and runtime in a fresh project
generate Viv code from a short scene brief
trace a compiler error back to its cause
plan a storyworld and its entity schema
review a Viv codebase for gaps and tweaks

Example prompts for the agent

Run /viv:setup and set up Viv for this project
/viv:write a sifting pattern that matches rags-to-riches storylines
/viv:fix the compiler error in mutiny.viv

How to install viv

Plugin marketplace

/plugin marketplace add anthropics/claude-plugins-community

/plugin install viv@claude-community

Step by step, with commands for each platform: Claude Code plugins: marketplaces, installing, and building your own

Questions about viv

How do I install viv in Claude Code?

Add the marketplace first: /plugin marketplace add anthropics/claude-plugins-community. Then install the plugin: /plugin install viv@claude-community. Restart your Claude session afterwards, since the plugin only loads on a fresh start.

What does the viv plugin do?

It gives Claude working knowledge of Viv. Ask for code, an error fix or a world design, and Claude looks it up in its bundled copy of the Viv source before answering.

Can I use viv on Windows?

Yes, if Claude runs inside WSL 2. The plugin's utility commands are bash scripts and don't run reliably in native Windows shells.

ponytail DietrichGebert ponytail steers Claude Code toward small, direct solutions and away from abstractions nobody asked for. Use it when you want the agent to build on what the project already has. ★ 176,443repo stars impeccable pbakaus Hands your agent a designer's vocabulary: 24 commands like polish, audit and bolder, so UI feedback stops being “make it pretty”. ★ 88,212repo stars last-30-days-skill mvanhorn Searches the web for what people posted about a topic in the last month and turns it into one structured brief. ★ 65,508repo stars claude-hud jarrodwatts Shows context usage, rate limits, running tools and todo progress under your input line. Useful when a session runs long and you want to watch the spend. ★ 28,841repo stars understand-anything Egonex-AI Turns codebases or markdown wikis into an interactive knowledge graph with a browser dashboard. Helps navigate unfamiliar repositories without reading files blindly. ★ 88,314repo stars mem0 mem0ai Adds persistent memory to Claude Code so your agent retains project context across terminal sessions. ★ 67,829repo stars