idempotency-patterns SKILL.md skillA
idempotency-patterns from rrezartprebreza/spring-boot-skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add rrezartprebreza/spring-boot-skills/idempotency-patterns@git:20260907.13f9ef2Pins git:20260907.13f9ef2 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- rrezartprebreza/spring-boot-skills
- Path
skills/spring-boot-3/idempotency-patterns/SKILL.md- Versions recorded
- 1
- Latest version
- git:20260907.13f9ef2, committed Sep 7, 2026
- Size
- 3,995 bytes
- Repository stars
- 338
- License
- MIT
Use when making retried HTTP commands or message processing safe against duplicate effects, including database-backed request keys, payload conflicts and concurrent retries. Do not apply caching as a substitute for business idempotency.
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 Patterns ## Spring Boot 3 baseline The examples use Java 17 and Jakarta APIs supported by this Boot version. Keep dependencies managed by the project's Boot BOM. ## Define the contract Identify the authenticated tenant/principal, operation, idempotency key, canonical request hash, retention window and replayable result. Scope uniqueness by principal/tenant and operation; a raw client key must never allow reading another user's result. Authenticate and authorize before both initial execution and replay. Bound key length and stored response size. Document what same-key/different-payload and still-in-progress requests return. ## Database-local effects For PostgreSQL, [the schema and claim example](examples/good-idempotency.sql) uses a composite primary key and INSERT ON CONFLICT DO NOTHING RETURNING. In a single database transaction: claim the key, apply the business write, store the resulting status/body/selected headers, then commit. Roll back the claim with the business mutation on failure. If the insert returns no row, load the existing result in a subsequent statement under READ …
Read the whole file at its exact version.
How to install
mdr add rrezartprebreza/spring-boot-skills/idempotency-patterns@sha256:b7d4e0c79536d7bdThe line at the top of this page pins the label git:20260907.13f9ef2, 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_jfafjyxga7m7ndo6)
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Versions
The registry has recorded 1 version of this file, committed on Sep 7, 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 (3995 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
rrezartprebreza/spring-boot-skills · 338 stars · license MIT · pushed 2026-11-02 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_jfafjyxga7m7ndo6 GET https://markdownregistry.com/api/v1/resolve?ref=rrezartprebreza/spring-boot-skills/idempotency-patterns GET https://markdownregistry.com/api/v1/blob/b7d4e0c79536d7bd632b3cc8aebe4dac42357799ab8395ad02b0c746bf403b2d
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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