Prism

Prism lets AI see through IRIS.

MCP server and CLI for InterSystems IRIS development — SQL queries, document management, compilation, debugging, testing, and ObjectScript execution via the Atelier REST API.

Features

• SQL — Run queries, DDL, stored procedures against any IRIS namespace

• Documents — Upload, fetch, compile, and delete .cls, .mac, .inc files

• Terminal — Execute ObjectScript via native (SuperServer) or WebSocket backend

• Debugging — Interactive step-through debugger with breakpoints, variable inspection, and stack traces

• Testing — Run %UnitTest test classes, list test methods, view historical results

• MCP Server — Expose all tools to AI assistants (Claude Code, Claude Desktop, Cursor, GitHub Copilot)

• Cast Plugins — Extend Prism with custom commands from any Git repository

• Cross-platform — Windows installer, Linux/macOS via pip/uv

Related MCP server: IBM i MCP Server

Quick Start

# Install
uv sync

# Configure (or use environment variables)
uv run prism config -u _SYSTEM -p SYS -U http://localhost:52773 -n USER

# Run a SQL query
uv run prism sql "SELECT TOP 5 Name FROM %Dictionary.ClassDefinition"

# Start the MCP server
uv run prism serve

Need an IRIS instance? Start one with Docker:

docker run -d --name iris -p 52773:52773 -p 1972:1972 intersystemsdc/iris-community:latest

CLI Commands

Global option: prism --format toon for TOON output.

Shell completion

Tab completion is available for bash, zsh, fish, and PowerShell:

prism --install-completion    # auto-detect shell

After running, restart your terminal. Then prism conf + Tab auto-completes to prism config, prism s + Tab cycles through sql and serve, etc.

See the commands overview for details.

MCP Tools

10 tools are always available, 2 workspace-gated (put_document, put_and_compile), and 9 debug-gated (debug_*) — up to 21 total.

See the full tool reference for details.

MCP Client Configuration

Claude Code

Add to ~/.claude/settings.json or .claude/settings.json:

{
  "mcpServers": {
    "iris": {
      "url": "http://localhost:3000/mcp"
    }
  }
}

Claude Desktop

Add to claude_desktop_config.json:

{
  "mcpServers": {
    "iris": {
      "command": "uv",
      "args": ["run", "--directory", "/path/to/prism", "prism", "serve"]
    }
  }
}

GitHub Copilot (VS Code)

Add to .vscode/mcp.json:

{
  "servers": {
    "iris": {
      "type": "http",
      "url": "http://localhost:3000/mcp"
    }
  }
}

Cursor

Add to .cursor/mcp.json:

{
  "mcpServers": {
    "iris": {
      "url": "http://localhost:3000/mcp"
    }
  }
}

Environment Variables

See the configuration guide for all 21 settings.

Project Structure

src/prism/
├── settings.py        # Pydantic settings (env, .env, config.json)
├── iris/
│   ├── sdk/            # HTTP client, workspace, debug protocols, terminal
│   └── api/            # Thin IRIS REST API wrappers (sql, docs, compile, debug)
├── mcp/               # MCP tools with @logged_tool decorator
│   ├── _decorator.py   # Logging + auto-discovery
│   ├── server.py       # FastMCP server
│   └── *.py            # One module per tool domain
├── cast/              # Cast plugin system (import-based Typer plugins)
│   └── manager.py      # Clone, import, cache, run commands
└── cli/               # Typer CLI commands (async wrappers)

Testing

uv run pytest tests/unit/ -v                    # No IRIS needed (276 tests)
IRIS_BASE_URL=http://localhost:52773 \
  uv run pytest tests/integration/ -v            # Needs IRIS (72 tests)
uv run ruff check . && uv run ruff format --check .  # Lint

Full testing guide: docs/testing.md

Releases

Prism follows a Git Flow release workflow with two protected branches: development (active work) and main (stable releases).

Download the latest Windows installer or standalone exe from GitHub Releases.

See the release guide for the full release workflow, branch model, hotfix procedure, and CI pipeline details.

Documentation

Full documentation at adriaerni.github.io/Prism

License

Copyright © 2026 Adria Sanchez.

Licensed under the GNU Affero General Public License v3.0 (AGPL-3.0). You may use, modify, and distribute this software freely, including for commercial purposes, as long as you share your source code under the same license. SaaS/hosting providers must also share their source code (network clause).

See LICENSE for full terms.