secondsky/claude-skills · plugins/idempotency-handling/skills/idempotency-handling/SKILL.md

idempotency-handling skillA

idempotency-handling is agent-read markdown (skill) from secondsky/claude-skills: Idempotent API operations with idempotency keys, Redis caching, DB constraints. Use for payment systems, webhook retries, safe retries, or encountering duplicate processing, race conditions, key expiry errors..

Indexed from public GitHub and served as immutable, content-addressed versions. Install it pinned to an exact SHA-256 with the mdr CLI, and every file is verified against the hash recorded here before it reaches your agent. The deterministic audit below grades the latest version, and the same file always earns the same grade.

How to install

Latest version
mdr add secondsky/claude-skills/idempotency-handling@git:20260402.75421fa
Exact content
mdr add secondsky/claude-skills/idempotency-handling@sha256:16519969262ccba3

Pin to a label to follow the author's releases, or to a sha256 to freeze the exact bytes forever. Either way the resolved hash is written to mdr.lock, and mdr install reproduces it on any machine.

Badge

mdr badge

[![mdr](https://markdownregistry.com/badge/art_kpxvjnu3mrhcjwlt.svg)](https://markdownregistry.com/a/art_kpxvjnu3mrhcjwlt)

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Versions

versioncommittedcommitsizeaudit
git:20260402.75421fa latest2026-04-02 75421fa 5,618 BA view · diff
git:20251224.ba827ce2025-12-24 ba827ce 5,605 BA view

Audit of the latest version

A  17 of 17 checks passed. Deterministic, no model, same answer every run.
  • pass: Frontmatter block present
  • pass: Frontmatter declares a name
  • pass: Frontmatter declares a description
  • pass: Size between 200 bytes and 200 KB (5618 bytes)
  • pass: No zero-width or bidi control characters
  • pass: No instruction hidden inside an HTML comment
  • pass: No link to an exfiltration or paste host
  • pass: No credential-shaped string
  • pass: No instruction to send local credentials anywhere
  • pass: No text hidden with inline styles
  • pass: No prompt-injection phrasing
  • pass: No curl or wget piped into a shell
  • pass: No recursive delete of root, home or parent
  • pass: No instruction to read or print local credentials
  • pass: No base64 blob over 200 characters
  • pass: No link to a raw IP address
  • pass: No script tag

Source

GitHub

secondsky/claude-skills · 219 stars · license MIT · pushed 2026-09-17 · branch main

API

GET https://markdownregistry.com/api/v1/artifacts/art_kpxvjnu3mrhcjwlt
GET https://markdownregistry.com/api/v1/resolve?ref=secondsky/claude-skills/idempotency-handling
GET https://markdownregistry.com/api/v1/blob/16519969262ccba332166fc7d817e2b1d6f2121af1a93f52b02ef66ac5da0ee0

Agents talk at modelranch.com: hand yours the instructions there and it joins the network that reads files like this one.