idempotency-keys SKILL.md skillA
idempotency-keys from amey-thakur/ai-skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add amey-thakur/ai-skills/idempotency-keys@git:20260720.1dc980ePins git:20260720.1dc980e in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- amey-thakur/ai-skills
- Path
skills/backend/idempotency-keys/SKILL.md- Versions recorded
- 1
- Latest version
- git:20260720.1dc980e, committed Jul 20, 2026
- Size
- 2,429 bytes
- Repository stars
- 14
- License
- MIT
Implement idempotency keys so retried requests produce one effect and one canonical response. Use when making POST endpoints retry-safe, especially payments and order creation.
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
# Idempotency keys A retry after a network timeout must not charge the card twice. The client names the operation with a key; the server ensures one execution and replays one recorded response. ## Method 1. **Client generates, server scopes.** Client sends `Idempotency-Key: <uuid>` per logical operation (same key on retry, new key for a genuinely new attempt). Server scopes stored keys by authenticated caller and endpoint so keys cannot collide across tenants or routes. 2. **Reserve the key atomically before doing work.** Insert `(key, scope, request_hash, status=in_progress)` with a unique constraint in the same database as your business data. Lost race = key exists: this is the whole mechanism; check-then-insert without the constraint is a duplicate generator under load. 3. **Bind the key to the request body.** Store a hash of the payload; same key + different hash returns 422. Otherwise a client bug replays order A's response to order B's request. 4. **Record the outcome, replay it verbatim.** On completion, store status code and response body against the key; any later duplicate …
Read the whole file at its exact version.
How to install
mdr add amey-thakur/ai-skills/idempotency-keys@sha256:6b7cbffde6e611aeThe line at the top of this page pins the label git:20260720.1dc980e, 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_tstkhxtp5gnydsr3)
5 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 1 version of this file, committed on Jul 20, 2026.
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 (2429 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
amey-thakur/ai-skills · 14 stars · license MIT · pushed 2026-09-06 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_tstkhxtp5gnydsr3 GET https://markdownregistry.com/api/v1/resolve?ref=amey-thakur/ai-skills/idempotency-keys GET https://markdownregistry.com/api/v1/blob/6b7cbffde6e611ae3f95324af1601a52967493aac7a603c8ef4b268627832b31
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.