idempotency-and-retries skillA
idempotency-and-retries is agent-read markdown (skill) from nahid-sparktales/agent-dispatcher: Make an operation safe to repeat — idempotency keys and their storage, what a replay returns, retry policy with backoff and jitter, and how to reconcile after a timeout whose outcome is unknown. Use when an operation has an external side effect (a charge, an email, a provisioning call), when a caller needs to retry safely, or when duplicates have already appeared in production. Not for webhook receipt mechanics, not for database transaction design, and not for choosing a queue..
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.
What the file says
# Idempotency and retries A timeout is not a failure. It is an unknown outcome, and the reflex to "just retry" is how one charge becomes two. Everything here exists to turn an unknown into something you can either repeat harmlessly or look up. ## When this fires Any operation with a side effect that is not naturally repeatable — money, messages, provisioning, counters, external API calls — or any time duplicate effects have been observed. It does not fire for a pure read, or for a write that is already a full replacement of a value with a value. ## Procedure 1. **Classify the operation first.** Naturally idempotent (set field to X, PUT a whole resource), repeat-unsafe (charge, send, increment, append), or read-only. Only the repeat-unsafe class needs the machinery below; adding it elsewhere is cost with no benefit. 2. **The key comes from the client and survives the retry.** Generated once per logical intent, reused unchanged on every attempt of that intent, and different for a genuinely new intent. A key the server generates per request is not an idempotency key. Scope it — per account and per …
Read the whole file at its exact version.
How to install
mdr add nahid-sparktales/agent-dispatcher/idempotency-and-retries@git:20260919.a0d4f55mdr add nahid-sparktales/agent-dispatcher/idempotency-and-retries@sha256:b593b30a889c317bPin 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.
[](https://markdownregistry.com/a/art_4kay3o45bbuk6wvp)
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Versions
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 (7216 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
nahid-sparktales/agent-dispatcher · 49 stars · license MIT · pushed 2026-09-23 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_4kay3o45bbuk6wvp GET https://markdownregistry.com/api/v1/resolve?ref=nahid-sparktales/agent-dispatcher/idempotency-and-retries GET https://markdownregistry.com/api/v1/blob/b593b30a889c317bf42bd5265c0e5b8f29a8c0e45ad8f205284c70ca93211e39
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