acp-extensions-authoring SKILL.md skillA
acp-extensions-authoring 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-extensions-authoring@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-extensions-authoring/SKILL.md- Versions recorded
- 1
- Latest version
- git:20260309.786511c, committed Mar 9, 2026
- Size
- 3,860 bytes
- Repository stars
- 40
- License
- MIT
Author custom ACP extensions — composable protocol add-ons with JSONPath targeting, schema composition, and independent versioning. Use when building proprietary or domain-specific extensions beyond the built-in ones.
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 Custom Extension Authoring ## Before writing code **Fetch live docs**: 1. Web-search `site:github.com agentic-commerce-protocol rfcs extensions` for the extensions framework RFC 2. Web-search `site:github.com agentic-commerce-protocol examples` for extension examples 3. Fetch `https://developers.openai.com/commerce/specs/checkout/` for how extensions integrate with checkout 4. Study the built-in discount extension as a reference: web-search `site:github.com agentic-commerce-protocol rfcs discount_extension` ## Conceptual Architecture ### What Extensions Are Extensions are **composable, optional add-ons** that augment ACP's core capabilities. They allow the protocol to grow without bloating the core spec — new features are added as extensions with independent lifecycles. ### Extension Properties Every extension defines: - **Name** — Core extensions use simple names (`discount`); third-party use reverse-domain (`com.example.loyalty`) - **Version** — Calendar versioned (`YYYY-MM-DD`) - **Parent capability** — `extends` field linking to the parent (e.g., extends `checkout`) - **JSONPath targets** — Where in the core schema this extension adds fields …
Read the whole file at its exact version.
How to install
mdr add orcaqubits/agentic-commerce-skills-plugins/acp-extensions-authoring@sha256:b80f4d69b25401d7The 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_cjxbq7ndjugjq3bs)
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 (3860 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_cjxbq7ndjugjq3bs GET https://markdownregistry.com/api/v1/resolve?ref=orcaqubits/agentic-commerce-skills-plugins/acp-extensions-authoring GET https://markdownregistry.com/api/v1/blob/b80f4d69b25401d7874e77add2adf45f8d6c8071de3af0e017a9bba88aac3291
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.