acp-dev-patterns SKILL.md skillA
acp-dev-patterns from orcaqubits/agentic-commerce-skills-plugins is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add orcaqubits/agentic-commerce-skills-plugins/acp-dev-patterns@git:20260309.786511cPins git:20260309.786511c in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- orcaqubits/agentic-commerce-skills-plugins
- Path
acp-agentic-commerce/skills/acp-dev-patterns/SKILL.md- Versions recorded
- 1
- Latest version
- git:20260309.786511c, committed Mar 9, 2026
- Size
- 5,145 bytes
- Repository stars
- 40
- License
- MIT
Cross-cutting ACP development patterns — idempotency, error handling, 3D Secure flows, request signing, rate limiting, monitoring, and security best practices. Use when designing architecture or solving production concerns.
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
# ACP Development Patterns ## Before writing code **Fetch live docs**: - Checkout spec: Fetch `https://developers.openai.com/commerce/specs/checkout/` for error codes and idempotency rules - Production guide: Fetch `https://developers.openai.com/commerce/guides/production/` for operational requirements - Stripe integration: Web-search `site:docs.stripe.com agentic-commerce` for PSP-side patterns - Changelog: Web-search `site:github.com agentic-commerce-protocol CHANGELOG` for latest changes ## Pattern: Idempotency Every POST request MUST include `Idempotency-Key` (UUID v4, max 255 chars). **Server-side implementation**: - Store key → response mapping for minimum 24 hours - Same key + identical body = replay original response, add `Idempotent-Replayed: true` header - Same key + different body = 422 `idempotency_conflict` - Key in flight = 409 `idempotency_in_flight` with `Retry-After` header - 5xx responses are NOT cached — retries treated as fresh requests **Client-side implementation**: - Generate UUID v4 for each logical operation - Reuse the same key when retrying a failed request - Generate a new key for a genuinely new operation …
Read the whole file at its exact version.
How to install
mdr add orcaqubits/agentic-commerce-skills-plugins/acp-dev-patterns@sha256:d8a060cf3cb21c55The line at the top of this page pins the label git:20260309.786511c, 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_wswkabka44hv2n7j)
5 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 1 version of this file, committed on Mar 9, 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 (5145 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
orcaqubits/agentic-commerce-skills-plugins · 40 stars · license MIT · pushed 2026-09-14 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_wswkabka44hv2n7j GET https://markdownregistry.com/api/v1/resolve?ref=orcaqubits/agentic-commerce-skills-plugins/acp-dev-patterns GET https://markdownregistry.com/api/v1/blob/d8a060cf3cb21c559008be88142997de79dc5bc1ae4a4415edfe8dbc2c8285df
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.