Functions
CheckedThis skill allows you to execute external code (like Python or JavaScript) within your conversations, enabling powerful automation and complex logic.
Install on your platform
Showing Claude Code. One command installs this skill into any of the agents below.
- 1
Run this in your project
terminal$ npx skills add pluginagentmarketplace/custom-plugin-javascript --skill functions -a claude-code Uses the open-source
skillsCLI and needs Node.js. Add-gto install it for your user instead of this project.
What we know about this skill
Publisher
pluginagentmarketplace
Taken from the source listing. We haven't verified who controls this account.
Install target
Live repository
Not pinned. Installing fetches whatever the repository holds at the time you run the command.
Automated safety checks
This skill passed all 6 checks. We read its files at one commit and looked for the things that make a skill dangerous to run — not for whether it works.
Declares what it does: passed
SKILL.md parses and declares a name and a description.
SKILL.md exists, its frontmatter parses, and it declares a name and a description.
No undeclared network calls: passed
Makes no network calls.
Every host the skill dials — from its scripts, its config endpoints or the commands it tells the agent to run — is either well-known package and API infrastructure or declared in its own frontmatter. Links in documentation are not counted.
No obfuscated payloads: passed
No encoded or obfuscated payloads.
No base64, hex or compressed blob is decoded and then executed, and no encoded shell commands.
No credential access: passed
Reads no keys, tokens, keychains or credential files.
Neither the code nor the SKILL.md instructions read SSH keys, cloud credentials, keychains, token stores, browser cookie databases or dotfiles that hold secrets.
No pipe-to-shell installers: passed
No pipe-to-shell or download-and-run installers.
No `curl … | sh` pattern, in the code or in the instructions, that runs code fetched at run time.
Pinned to a commit: passed
Scanned pluginagentmarketplace/custom-plugin-javascript at a5f7afe637.
The exact upstream commit SHA that was scanned is recorded, so the result refers to specific bytes.
- Commit
- a5f7afe637
- Manifest
- skills/functions/SKILL.md
- Scanned
- 7 files, 1,193 lines
About this skill
What it does
This skill allows AI agents to execute custom functions. It provides a mechanism for integrating external code or logic into the agent's workflow, enabling more complex and specialized tasks than standard capabilities allow. The skill facilitates extending an agent’s functionality without modifying its core architecture.
When to use it
- Performing calculations: Use when you need the AI agent to perform mathematical operations beyond simple arithmetic.
- Accessing external APIs: Integrate with third-party services by defining functions that call those APIs.
- Custom data processing: Implement specific data transformations or manipulations not available through built-in tools.
- Automating repetitive tasks: Define functions to automate workflows and reduce manual intervention.
Key capabilities
- Function execution
- Integration with external code
- Extending agent functionality
- Custom logic implementation
Example prompts
- "Execute the 'calculate_tax' function with a price of 100 and a tax rate of 0.07."
- "Run the 'get_weather' function for London."
- "Please use the 'format_date' function on this date: 2024-01-01."
Tips & gotchas
The functions available to the AI agent are defined externally, so ensure they are properly registered and accessible. Carefully consider security implications when integrating external code or accessing APIs through custom functions.