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Developer GuideCLI Tools

CLI Tools

ARK provides two command-line tools for different use cases.

Overview

fark - Fast Agentic Runtime Kit

The primary tool for querying agents and teams, plus CRUD operations on ARK resources.

ark - ARK Management Interface

Interactive dashboard and system status monitoring tool.

fark

fark is the primary CLI tool for querying agents and teams, plus managing ARK resources.

Installation

# Download latest release for your platform
# Linux/macOS
curl -L "https://github.com/mckinsey/agents-at-scale-ark/releases/latest/download/fark_$(uname)_$(uname -m | sed 's/aarch64/arm64/').tar.gz" | tar xz
sudo mv fark /usr/local/bin/
 
# Windows: Download fark_Windows_x86_64.zip from releases page
 
# Verify installation
fark --help

From Source

# Clone and build from repository
git clone https://github.com/mckinsey/agents-at-scale-ark.git
cd agents-at-scale-ark
make fark-install
 
# Verify installation
fark --help

Querying Agents and Teams

Agent Queries

# Basic agent query
fark agent weather "What's the weather today?"
 
# Math calculations
fark agent math "What is 15 * 23?"
 
# Location queries (uses get-coordinates tool)
fark agent location "Where is Paris?"
 
# Query with file input
fark agent weather -f input.txt "Analyze this weather data"
 
# Query with session management (requires memory service)
fark agent weather "What's the weather in NYC?" --session-id weather-session
fark agent weather "How about tomorrow?" --session-id weather-session

Team Queries

# Basic team query
fark team team-seq "Process this request"
 
# Query team with multiple agents
fark team team-seq "Calculate 2+2 and explain the result"

Query Management

# List all queries
fark query
 
# Trigger existing query
fark query weather-query
 
# Trigger with new input
fark query weather-query "What's the weather in London?"

Resource Management

Listing Resources

# List all agents
fark get agent
 
# List all teams
fark get team
 
# List all models
fark get model
 
# List all tools
fark get tool
 
# Get specific resource details
fark get agent weather

Creating Resources

# Create agent from file
fark create agent my-agent -f samples/agents/math.yaml
 
# Create agent with prompt
fark create agent my-math --prompt "You're an agent helping with calculations" --model default
 
# Create agent with tools
fark create agent my-location --prompt "Help with location queries" --tools get-coordinates

Updating Resources

# Update agent from file
fark update agent math -f updated-agent.yaml
 
# Update agent prompt
fark update agent math --prompt "You're an advanced mathematical assistant"

Deleting Resources

# Delete specific agent
fark delete agent math
 
# Delete team
fark delete team team-seq

Output Options

# JSON output
fark agent math "What is 5 + 3?" --json
 
# Verbose logging (shows token usage)
fark agent math "What is 5 + 3?" --verbose
 
# Silent mode (suppress event logging)
fark agent math "What is 5 + 3?" --silent

Server Mode

fark can also run as an HTTP server providing REST API endpoints:

# Start server on default port 8080
fark server
 
# Start server on custom port
fark server --port 9090

Shell Completion

# Install completion for zsh
fark completion zsh > ~/.fark-completion
echo "source ~/.fark-completion" >> ~/.zshrc
source ~/.zshrc
 
# Install completion for bash
fark completion bash > /etc/bash_completion.d/fark

ark CLI

ark provides an interactive dashboard and system monitoring capabilities.

Installation

# Build and install from repository root
make ark-cli-install
 
# Verify installation
ark --help

Interactive Menu

Launch the interactive menu interface:

ark

System Status

Check the status of ARK services and components:

# Check overall system status
ark status

Common Use Cases

Development Workflow

# Create and test an agent
fark create agent test-math --prompt "You are a helpful math assistant"
fark agent test-math "What is 2 + 2?"
 
# Update and retest
fark update agent test-math --prompt "You are an advanced mathematical assistant"
fark agent test-math "Calculate the square root of 16"
 
# Clean up
fark delete agent test-math

Production Monitoring

# Check system health
ark status
 
# Monitor specific resources
fark get agent
fark get team
 
# Query agents with structured output
fark agent weather "What's the weather?" --json

k9s

k9s is a terminal-based UI for Kubernetes that lets you interactively manage and work with your cluster. It provides a visual interface to navigate, inspect, and modify Kubernetes resources including ARK resources such as agents, teams, models, and queries without memorizing complex kubectl commands.

Installation

k9s is optionally installed with make quickstart and can be launched from your terminal:

# installs k9s (optional)
make quickstart
# launch k9s
k9s

Useful Commands

CommandDescription
?Show help and all available commands
:crdsShow all custom resource definitions (CRDs) including agents, models, teams
:agentsShow all agents in the cluster
:modelsShow all models in the cluster
:teamsShow all teams in the cluster
:podsShow all pods
:svcShow all services
:deployShow all deployments
dDescribe the selected resource
Shift+JJump to owner (eg Agent → MCP Server)
Shift+ASort resources by age
eEdit the selected resource
Ctrl+DDelete the selected resource
lView logs for the selected pod
sShell into the selected pod
/Filter resources by name
EscapeGo back to previous view

Navigate to any resource type by typing : followed by the resource name. Use the arrow keys to select resources and the commands above to interact with them.

kubectl

kubectl is the command-line tool for interacting with Kubernetes clusters. It’s essential for managing ARK resources and troubleshooting applications.

Installation

# macOS
brew install kubectl
 
# Linux
curl -LO "https://dl.k8s.io/release/$(curl -L -s https://dl.k8s.io/release/stable.txt)/bin/linux/amd64/kubectl"
chmod +x kubectl
sudo mv kubectl /usr/local/bin/
 
# Windows
choco install kubernetes-cli

Basic Commands

View ARK Resources

# List all pods in the default namespace
kubectl get pods
 
# List all ARK custom resources
kubectl get queries,agents,teams,models
 
# Get detailed information about a specific query
kubectl describe query my-query

Logs and Debugging

# View logs from a pod
kubectl logs pod-name
 
# Follow logs in real-time
kubectl logs -f pod-name
 
# Execute commands in a running container
kubectl exec -it pod-name -- /bin/bash

Managing Resources

# Apply an ARK configuration
kubectl apply -f my-query.yaml
 
# Delete a resource
kubectl delete query my-query
 
# Edit a resource in-place
kubectl edit query my-query

Working with Namespaces

# List all namespaces
kubectl get namespaces
 
# Switch context to a specific namespace
kubectl config set-context --current --namespace=my-namespace

Useful Aliases

Add these to your shell configuration:

alias k=kubectl
alias kgp='kubectl get pods'
alias kgs='kubectl get svc'
alias kgn='kubectl get nodes'
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