name: domino-launchers description: Create Domino Launchers - parameterized web forms for self-service job execution. Enable business users to run analyses, generate reports, and trigger batch predictions without coding. Covers parameter types, email notifications, result delivery, and access control. Use when building self-service data products or enabling non-technical users.

Domino Launchers Skill

Description

This skill helps users create and use Domino Launchers - web forms that allow non-technical users to run parameterized jobs and receive results.

Activation

Activate this skill when users want to:

Create self-service data products
Build parameterized job interfaces
Enable business users to run analyses
Generate reports on demand
Share reproducible workflows

What is a Launcher?

A Launcher is:

Web Form: UI for entering parameters
Job Trigger: Runs a script with user inputs
Results Delivery: Sends output via email/dashboard
Self-Service: Business users can run without coding

Use Cases

Report Generation: Parameterized business reports
Batch Predictions: Score data on demand
Data Exports: Custom data extracts
Analysis Requests: Ad-hoc analytics
Model Testing: Test models with different inputs

Creating a Launcher

Via Domino UI

Go to your project
Navigate to Deployments > Launchers
Click New Launcher
Configure:
- Name: Descriptive name
- Description: What the launcher does
- Command: Script to run
- Parameters: Input fields
- Hardware Tier: Resources
- Environment: Compute environment

Launcher Script (Python)

# generate_report.py
import argparse
import pandas as pd

# Parse launcher parameters
parser = argparse.ArgumentParser()
parser.add_argument('--start-date', required=True)
parser.add_argument('--end-date', required=True)
parser.add_argument('--region', default='all')
args = parser.parse_args()

# Generate report
df = generate_report(args.start_date, args.end_date, args.region)

# Save results (will be available to launcher user)
df.to_csv('/mnt/results/report.csv', index=False)
df.to_html('/mnt/results/report.html', index=False)

Launcher Script (R)

# launcher.R
args <- commandArgs(trailingOnly = TRUE)
a <- as.integer(args[1])
b <- as.integer(args[2])

if (is.na(a)) {
  print("A is not a number")
} else if (is.na(b)) {
  print("B is not a number")
} else {
  paste("The sum of", a, "and", b, "is:", a + b)
}

Command: launcher.R ${A} ${B}

Launcher Command

# Python script with named arguments
python generate_report.py --start-date ${start_date} --end-date ${end_date} --region ${region}

# Python script with positional arguments
my_script.py -x=1 ${file} ${start_date}

# R script with positional arguments
launcher.R ${A} ${B}

Note: Parameter values are enclosed in single quotes, preserving special characters. File parameters pass the file path. Multi-select parameters pass comma-separated values.

Parameter Types

Text Input

name: customer_name
type: text
label: Customer Name
required: true
default: ""

Dropdown/Select

name: region
type: select
label: Region
options:
  - North America
  - Europe
  - Asia Pacific
default: North America

Date Picker

name: start_date
type: date
label: Start Date
required: true

Number

name: quantity
type: number
label: Quantity
min: 1
max: 1000
default: 100

File Upload

name: input_file
type: file
label: Input File
accept: .csv,.xlsx

Generating Results

File-Based Results

Any files created in /mnt/results/ are available as results:

# Save multiple output formats
df.to_csv('/mnt/results/data.csv')
df.to_excel('/mnt/results/data.xlsx')
fig.savefig('/mnt/results/chart.png')

HTML Email Content

Create email.html for custom email body:

# Generate HTML for email
html_content = f"""
<html>
<body>
<h1>Report for {args.start_date} to {args.end_date}</h1>
<p>Summary: {summary}</p>
{df.to_html()}
</body>
</html>
"""

with open('/mnt/results/email.html', 'w') as f:
    f.write(html_content)

Rich Reports

Use notebooks for rich reports:

# Use papermill to execute parameterized notebook
import papermill as pm

pm.execute_notebook(
    'report_template.ipynb',
    '/mnt/results/report.ipynb',
    parameters={
        'start_date': args.start_date,
        'end_date': args.end_date
    }
)

Notifications

Email Configuration

Configure notification recipients:

In launcher settings
Add email addresses
Results sent automatically on completion

Email Contents

Link to results in Domino
Attached files (if enabled)
Custom HTML body (if email.html created)

Access Control

Who Can Run Launchers

Contributors: Can create and run launchers
Launcher Users: Can run launchers only
Results Consumers: Can view results only

Setting Permissions

Go to Project Settings
Add users with appropriate roles
Share launcher URL with users

Running a Launcher

Via UI

Go to launcher page
Fill in parameters
Click Run
Wait for results (email notification)

Via API

import requests

response = requests.post(
    "https://your-domino.com/v4/launchers/{launcher_id}/run",
    headers={"X-Domino-Api-Key": "YOUR_API_KEY"},
    json={
        "parameters": {
            "start_date": "2024-01-01",
            "end_date": "2024-01-31",
            "region": "North America"
        }
    }
)

run_id = response.json()["runId"]

Viewing Results

Via Email

Results link sent to configured recipients.

Via Jobs Dashboard

Each launcher run creates a job:

Go to Jobs in project
Find the launcher job
View results in job details

Programmatic Access

# Get launcher run results
results = domino.runs_get_results(run_id)

Example: Scoring Launcher

Script (score_data.py)

import argparse
import pandas as pd
import joblib

parser = argparse.ArgumentParser()
parser.add_argument('--input-file', required=True)
parser.add_argument('--output-format', default='csv')
args = parser.parse_args()

# Load model
model = joblib.load('/mnt/artifacts/model.joblib')

# Load and score data
df = pd.read_csv(args.input_file)
predictions = model.predict(df)
df['prediction'] = predictions

# Save results
if args.output_format == 'csv':
    df.to_csv('/mnt/results/predictions.csv', index=False)
else:
    df.to_excel('/mnt/results/predictions.xlsx', index=False)

Launcher Configuration

name: Score Customer Data
command: python score_data.py --input-file ${input_file} --output-format ${output_format}
parameters:
  - name: input_file
    type: file
    label: Customer Data (CSV)
    required: true
  - name: output_format
    type: select
    label: Output Format
    options: [csv, xlsx]
    default: csv

Best Practices

1. Clear Parameter Names

Use descriptive labels users understand.

2. Input Validation

# Validate inputs in script
if args.end_date < args.start_date:
    raise ValueError("End date must be after start date")

3. Progress Logging

print("Loading data...")
print(f"Processing {len(df)} records...")
print("Generating report...")
print("Complete!")

4. Error Handling

try:
    process_data()
except Exception as e:
    # Save error message as result
    with open('/mnt/results/error.txt', 'w') as f:
        f.write(f"Error: {str(e)}")
    raise

5. Documentation

Include help text in launcher description.

Troubleshooting

Launcher Fails

Check script runs manually first
Verify file paths are correct
Review job logs for errors

No Email Received

Check email addresses configured
Verify email server settings (admin)
Check spam folder

Wrong Results

Verify parameter passing
Check variable substitution syntax
Test with known inputs

Documentation Reference

Use Launchers

domino-launchers

SKILL.md