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@rules-cascade/cli

v1.0.0-alpha.11

Published

The rcas command: check, test and evaluate Rule Cascade rulesets, and serve them to AI agents over MCP. Installs the prebuilt binary for this platform. Run it with npx -y @rules-cascade/cli <command>.

Readme

@rules-cascade/cli

The rcas command of Rule Cascade: check, test and evaluate rulesets, and serve them to AI agents over MCP.

The package holds no JavaScript engine: npm installs the prebuilt rcas binary for your platform (Linux, macOS and Windows, on x64 and arm64) as an optional dependency, and the rcas command runs it.

Install

npm install -g @rules-cascade/cli
rcas --help

Or run it without installing:

npx -y @rules-cascade/cli --help

As an MCP server

npx -y @rules-cascade/cli mcp

The command speaks MCP over standard input and output, so an MCP client can start it with that command line. npx -y @rules-cascade/cli mcp --http 127.0.0.1:8765 serves it over HTTP instead, at http://127.0.0.1:8765/mcp, for clients that take a URL. Without installing anything, agents can use the hosted server at https://mcp.rulescascade.com/mcp: it knows the specification and checks, evaluates and derives the rulesets an agent sends it, but cannot see or change a project.

Other ways to install

curl -fsSL https://rulescascade.com/install.sh | sh             # Linux and macOS
irm https://rulescascade.com/install.ps1 | iex                  # Windows PowerShell
go install rulescascade.com/go/cmd/rcas@latest                  # from source, with Go

If npm skipped the optional dependency (for example with --omit=optional), rcas says which package is missing. To run a binary you installed some other way through this package, set RCAS_BINARY_PATH to its path.

Documentation

https://rulescascade.com/reference/cli/

License

Apache-2.0. See LICENSE and NOTICE.