How do I install the Launchpad Custom Function skill?

Run npx skillmds@latest add pegasystems/launchpad-custom-function in your terminal (requires Node.js), paste this page's agent-chat prompt into Claude, Cursor, or any MCP-connected agent, or download the SKILL.md file and copy it into your agent's skills directory.

Is Launchpad Custom Function safe to use?

This skill has not completed SkillMD's automated safety review yet. SkillMD never runs a skill's scripts for you; review the SKILL.md before installing.

Which AI agents work with Launchpad Custom Function?

This skill is tagged as working with Claude Code, Claude.ai, OpenAI Codex. SKILL.md is an open format, so most agents that read a skills directory can load it too.

Is Launchpad Custom Function free to use?

Yes. Installing skills from SkillMD is free, and the skill stays under its author's original license.

Who published Launchpad Custom Function?

pegasystems (@pegasystems) published this skill. Their other Agent Skills are listed on their SkillMD profile.

Launchpad Custom Function by pegasystems

Name: Launchpad Custom Function
Author: pegasystems

Launchpad Custom Function

Custom Functions are a type of Function that extends LaunchPad with code written in Java 11, Python 3.12, or Node.js 20 via AWS Lambda. Use this skill whenever the user asks what is a custom function, what types of functions exist, how to create or extend Launchpad with custom logic, or when troubleshooting handler naming conventions (Java package.Class::method, Python file.function), signature mismatches, AWS Lambda execution limits, or timezone/null handling in date or list functions. Use when the user needs to parse Excel files, perform advanced date manipulations, integrate external libraries, or handle specialized data transformations. Use when user asks for Callable rules.

pegasystems d8af6df 7 files · 8.9 KB Updated Sep 17, 2026

File contents

Custom Function

Custom Function is a type Function that enables the user to extend the capability of LaunchPad with code written in High Level Languages (HLL) like Java. This feature is typically reserved for functionality that cannot be implemented in another rule type, i.e. Automation. To use this feature you upload the HLL artifacts, i.e. Jar or Python file, and reference the method you want to invoke when the Custom Function is called. The signature of Custom Function MUST match that of the HLL method so that the Custom Function can invoke it.

Like Functions Custom Function are sideeffect free and should not assume any shared state between requests. They perform the task or computation required the same way each time they are invoked.

Supported Languages:

Java 11
Python 3.12
Node.js 20

How to create

Write your code in a supported High Level Language (HLL)
Create JAR (Java) or ZIP (Python, Node.js) of code, as known as Code Bundle
Create a Function Rule

Be sure to specify Function uses a Code Bundle

Upload Code Bundle
Define Custom Function's inputs parameters and output

MUST signature of method defined in Code Bundle

Inputs

Inputs are also known as arguments to a Function. The input type MUST be compatible with the LaunchPad type otherwise user may have issues accessing the data associated with the input.

Gotchas

Timezone Awareness: Date Functions use GMT by default; use TodayWithTimeZone for specific timezones
Custom Function Limits: AWS Lambda execution limits apply to custom Functions
Arguments defined in HLL method MUST be defined in the same order as the Custom Function
Return type of HLL method MUST be compatible with the return type of the Custom Function
Using objects as input requires special handling for LaunchPad Field

Best Practices

Use built-in Functions before creating custom function
Test Custom Function with various input values
Document custom Functions thoroughly

Example

Parsing an Excel file that you uploaded and extract the results into a user defined data structure.
Advanced date manipulations
Complex mathematical calculations
Integration with external libraries
Specialized data transformations

---name: launchpad-custom-functiondescription: Custom Functions are a type of Function that extends LaunchPad with code written in Java 11, Python 3.12, or Node.js 20 via AWS Lambda. Use this skill whenever the user asks what is a custom function, what types of functions exist, how to create or extend Launchpad with custom logic, or when troubleshooting handler naming conventions (Java package.Class::method, Python file.function), signature mismatches, AWS Lambda execution limits, or timezone/null handling in date or list functions. Use when the user needs to parse Excel files, perform advanced date manipulations, integrate external libraries, or handle specialized data transformations. Use when user asks for Callable rules.---## Custom Function[Custom Function is a type Function](references/custom-function.md) that enables the user to extend the capability of LaunchPad with code written in High Level Languages (HLL) like Java.This feature is typically reserved for functionality that cannot be implemented in another rule type, i.e. Automation. To use this feature you upload the HLL artifacts, i.e. Jar or Python file, and reference the method you want to invoke when the Custom Function is called.The signature of Custom Function MUST match that of the HLL method so that the Custom Function can invoke it.Like Functions Custom Function are sideeffect free and should not assume any shared state between requests. They perform the task or computation required the same way each time they are invoked.**Supported Languages:**- [Java 11](references/java.md)- [Python 3.12](references/python.md)- [Node.js 20](references/node.md)### How to create1. Write your code in a supported High Level Language (HLL)2. Create JAR (Java) or ZIP (Python, Node.js) of code, as known as Code Bundle3. Create a Function Rule - Be sure to specify Function uses a Code Bundle4. Upload Code Bundle5. Define Custom Function's inputs parameters and output - MUST signature of method defined in Code Bundle ### InputsInputs are also known as arguments to a Function. The input type MUST be compatiblewith the LaunchPad type otherwise user may have issues accessing the data associated with the input.### Gotchas- **Timezone Awareness:** Date Functions use GMT by default; use `TodayWithTimeZone` for specific timezones- **Custom Function Limits:** AWS Lambda execution limits apply to custom Functions- Arguments defined in HLL method MUST be defined in the same order as the Custom Function- Return type of HLL method MUST be compatible with the return type of the Custom Function- [Using objects as input](references/field-reference.md) requires special handling for LaunchPad Field## Best Practices- Use built-in Functions before creating custom function- Test Custom Function with various input values- Document custom Functions thoroughly# Example- Parsing an Excel file that you uploaded and extract the results into a user defined data structure.- Advanced date manipulations- Complex mathematical calculations- Integration with external libraries- Specialized data transformations

Frequently asked questions