Silo

Build extensions with Claude Code ​

The silo-extension-builder Claude Code skill turns a plain-English description into a working Silo extension — it scaffolds the project, writes the source, compiles it, and installs it into Silo in one session.

Install the skill ​

Copy the skill file to Claude Code's global skills directory so it's available in any project:

bash
mkdir -p ~/.claude/skills/silo-extension-builder && \
  curl -fsSL -o ~/.claude/skills/silo-extension-builder/SKILL.md \
  https://raw.githubusercontent.com/silo-code/silo/main/skills/silo-extension-builder/SKILL.md

Use the skill ​

Start a Claude Code session in any directory, then type:

/silo-extension-builder Create a status bar item that shows the current git branch.

The skill will ask for an extension id and output path if you don't provide them, scaffold the project with create-silo-extension, write the implementation, compile it, and offer to install it via silo install.

You can also pass id and path upfront to skip the prompts:

/silo-extension-builder id=dave.clock path=~/my-extensions/dave.clock

Create a status bar item that shows the current time, updated every second.

What gets created ​

After scaffolding, the extension directory contains:

<path>/
  src/index.tsx      ← your extension source (edit this)
  package.json       ← manifest with silo.id, silo.main, npm scripts
  dist/index.js      ← compiled bundle (after first build)

The package.json includes build scripts:

bash
npm run build   # one-shot compile
npm run dev     # watch mode — recompiles on every save

Install and uninstall ​

bash
silo install <path>        # install from a local folder
silo uninstall <id>        # remove by extension id

Installed extensions appear in Settings → Extensions where you can also disable or uninstall them from the UI.

Publish your extension ​

When the extension is ready to share, publish it to the Silo registry so it appears on Browse and extensions.getsilo.dev — see Sharing extensions. Folder / URL / npm sideloads still work for private shares.

See Publishing an extension for the package contract.