red-roving-rascal 0.4.0

A lightweight API testing and evaluation toolkit

red-roving-rascal

A pluggable analysis and scoring framework for evaluating input/output pairs against configurable quality criteria.

Install (library only)

pip install red-roving-rascal

Deploy to AWS

Deploys API Gateway → ECS Fargate → DynamoDB into your AWS account.

Prerequisites

• AWS CLI configured with credentials (aws configure)
• Docker installed and running
• Node.js ≥ 18 (for npx cdk)
• Python ≥ 3.10

One-command deploy

git clone https://github.com/dboyd13/red-roving-rascal.git
cd red-roving-rascal
python3 -m venv .venv
.venv/bin/pip install -e ".[cdk]"
npx cdk@latest bootstrap   # first time per account/region
npx cdk@latest deploy

This builds the Docker image locally from the included Dockerfile, pushes it to a CDK-managed ECR repository, and deploys the full stack. Defaults to us-east-1; set CDK_DEFAULT_REGION to change:

CDK_DEFAULT_REGION=eu-west-1 npx cdk@latest deploy

Access control (optional)

Restrict API access to specific AWS accounts:

RASCAL_ALLOWED_ACCOUNTS="111111111111,222222222222" npx cdk@latest deploy

Or to an AWS Organization:

RASCAL_ORG_ID="o-abc123" npx cdk@latest deploy

Without either, the API Gateway resource policy denies all requests by default.

What gets deployed

• VPC with public/private subnets
• ECS Fargate service running the rascal backend
• Network Load Balancer (internal)
• API Gateway with IAM auth and VPC Link
• Three DynamoDB tables (data, jobs, suites)
• CloudWatch alarms (5xx errors, CPU utilization)

Tear down

npx cdk@latest destroy

Quick start (client SDK)

from rascal.client import RascalClient

client = RascalClient(endpoint="https://your-api-endpoint.execute-api.us-east-1.amazonaws.com/v1")

Extending with custom analyzers

rascal uses a plugin model. Write a wrapper that registers your components, then start the server:

from rascal.registry import Registry
from rascal.server import run

# Register your custom analyzer + judge
Registry.register("analyzer.custom", MyAnalyzer())
Registry.register("judge.custom", MyJudge())

run()

See src/rascal/registry.py for the Analyzer and Judge protocol definitions.

Development

pip install -e ".[cdk]"
pytest

License

Apache 2.0