Skip to content
TrustedSkillsbeta
Back to all skills

Idempotency Handling

Checked
aj-geddes·vlatest·backend·MIT

This skill ensures operations are safely repeated without unintended side effects, crucial for reliable and robust systems.

Repository

Install on your platform

Showing Claude Code. One command installs this skill into any of the agents below.

  1. 1

    Run this in your project

    terminal
    $ npx skills add aj-geddes/useful-ai-prompts --skill idempotency-handling -a claude-code

  2. Uses the open-source skills CLI and needs Node.js. Add -g to install it for your user instead of this project.

What we know about this skill

Publisher

aj-geddes

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.

No human has reviewed this code. The checks below are a static scan of the files at one commit — nobody has run this skill or judged whether it works. A skill runs with whatever access you give your agent, so read the source before you install it.

Automated safety checks

scanned

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 aj-geddes/useful-ai-prompts at 3f5182cfd7.

    The exact upstream commit SHA that was scanned is recorded, so the result refers to specific bytes.

Commit
3f5182cfd7
Manifest
skills/idempotency-handling/SKILL.md
Scanned
7 files, 755 lines
This is a static scan, not a review. It reads the skill's files; it does not run them, and it cannot tell you whether the skill is any good or whether the code does what its description says. A skill runs with whatever access you give your agent.
What each check looks for →

About this skill

What it does

This skill ensures AI agents execute operations only once, preventing duplicate actions when requests are retried or sent multiple times. It safeguards workflows against unintended side effects like double charges or redundant data entries by tracking unique request identifiers.

When to use it

  • Financial transactions: Preventing duplicate credit card charges during network timeouts.
  • Data synchronization: Avoiding conflicting updates when syncing files between cloud services.
  • API rate limiting: Managing retries without exceeding service quotas or triggering bans.
  • Automated workflows: Ensuring scripts don't reprocess emails or notifications already handled.

Key capabilities

  • Generates and validates unique request IDs for each operation.
  • Detects and rejects duplicate requests based on stored history.
  • Maintains state consistency across retries in volatile environments.
  • Logs execution attempts to audit successful vs. failed operations.

Example prompts

  • "Execute this payment but ensure it only processes once even if the network fails."
  • "Sync my contacts with Google Calendar, ignoring any entries already added today."
  • "Retry this API call three times if it fails, but stop after the first success to avoid duplicates."

Tips & gotchas

Idempotency requires a backend system capable of storing and checking request IDs; AI agents alone cannot enforce this without external state tracking. Always define clear expiration windows for idempotent keys to prevent stale data from blocking legitimate retries.