unboundcompute/security-agent-skills · skills/auditing-payment-state-machine-and-idempotency/SKILL.md

auditing-payment-state-machine-and-idempotency skillA

auditing-payment-state-machine-and-idempotency is agent-read markdown (skill) from unboundcompute/security-agent-skills: Audit payment and checkout state machines for transitions an attacker can drive out of order or replay for value: an order marked paid before the charge is confirmed, a step that can be skipped or repeated so goods ship without settlement, a non-idempotent charge or fulfillment endpoint that double-processes on a retried or replayed request, and a refund or cancel that returns value while the underlying charge stays captured. Covers checkout, charge, fulfillment, and refund flows where money and.

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 unboundcompute/security-agent-skills/auditing-payment-state-machine-and-idempotency@git:20260829.b60f9b2
Exact content
mdr add unboundcompute/security-agent-skills/auditing-payment-state-machine-and-idempotency@sha256:b4778d7cd9900780

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_gkbpbslv356gu4ax.svg)](https://markdownregistry.com/a/art_gkbpbslv356gu4ax)

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Versions

versioncommittedcommitsizeaudit
git:20260829.b60f9b2 latest2026-08-29 b60f9b2 10,077 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 (10077 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

unboundcompute/security-agent-skills · 5 stars · license MIT · pushed 2026-09-08 · branch main

API

GET https://markdownregistry.com/api/v1/artifacts/art_gkbpbslv356gu4ax
GET https://markdownregistry.com/api/v1/resolve?ref=unboundcompute/security-agent-skills/auditing-payment-state-machine-and-idempotency
GET https://markdownregistry.com/api/v1/blob/b4778d7cd99007807ad7019aad824d2e8e8504437d789351029bbdb7269bc924

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