idempotency-handling SKILL.md skillA
idempotency-handling from asymmetric-al/core is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add asymmetric-al/core/idempotency-handling@git:20260611.2b7919bPins git:20260611.2b7919b in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- asymmetric-al/core
- Path
.agents/skills/idempotency-handling/SKILL.md- Versions recorded
- 2
- Latest version
- git:20260611.2b7919b, committed Jun 11, 2026
- First version recorded
- May 29, 2026
- Size
- 3,472 bytes
- Repository stars
- 370
- License
- AGPL-3.0
Implement idempotency keys and handling to ensure operations can be safely retried without duplicate effects. Use when building payment systems, APIs with retries, or distributed transactions.
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
## This repository (Asymmetric-al/core) Subordinate to **`docs/ai/rules/backend.md`** and **`docs/guides/architecture/data-access-boundary.md`**. Pair with Stripe/payment work using ecosystem skills under `.agents/skills/` when installed. **Repo touchpoints:** - Donor API idempotency header validation: `packages/api/src/donate/idempotency.ts` (`idempotency-key` / `x-idempotency-key`). - Prefer existing monorepo patterns (Next.js route handlers, Supabase, Stripe) over copying generic Express/Redis examples from this skill verbatim. Refresh: `references/upstream.md`. # Idempotency Handling ## Table of Contents - [Overview](#overview) - [When to Use](#when-to-use) - [Quick Start](#quick-start) - [Reference Guides](#reference-guides) - [Best Practices](#best-practices) ## Overview Implement idempotency to ensure operations produce the same result regardless of how many times they're executed. ## When to Use - Payment processing - API endpoints with retries - Webhooks and callbacks - Message queue consumers - Distributed transactions - Bank transfers - Order creation - Email sending - Resource creation ## Quick Start Minimal working example: ```typescript …
Read the whole file at its exact version.
How to install
mdr add asymmetric-al/core/idempotency-handling@sha256:69eedaffac1fad83The line at the top of this page pins the label git:20260611.2b7919b, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_rhrsahrg5r653ps6)
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Versions
The registry has recorded 2 versions of this file, between May 29, 2026 and Jun 11, 2026, about one every 13 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20260611.2b7919b latest | 2026-06-11 | 2b7919b | 3,472 B | A | view · diff |
| git:20260529.633ce10 | 2026-05-29 | 633ce10 | 3,226 B | A | view |
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (3472 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
asymmetric-al/core · 370 stars · license AGPL-3.0 · pushed 2026-11-06 · branch develop
API
GET https://markdownregistry.com/api/v1/artifacts/art_rhrsahrg5r653ps6 GET https://markdownregistry.com/api/v1/resolve?ref=asymmetric-al/core/idempotency-handling GET https://markdownregistry.com/api/v1/blob/69eedaffac1fad83dd0af04b0611ffe45aaa07ef51f70611866ad6a0d8de7944
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.
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