acp-capability-negotiation SKILL.md skillA
acp-capability-negotiation 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-capability-negotiation@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-capability-negotiation/SKILL.md- Versions recorded
- 1
- Latest version
- git:20260309.786511c, committed Mar 9, 2026
- Size
- 3,848 bytes
- Repository stars
- 40
- License
- MIT
Implement ACP capability negotiation — dynamic discovery of mutually supported capabilities, extensions, payment handlers, and interventions. Use when building multi-feature merchant servers or agents that adapt to merchant capabilities.
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 Capability Negotiation ## Before writing code **Fetch live docs**: 1. Web-search `site:github.com agentic-commerce-protocol rfcs capability_negotiation` for the capability negotiation RFC 2. Fetch `https://developers.openai.com/commerce/specs/checkout/` for how capabilities appear in checkout requests/responses 3. Web-search `site:github.com agentic-commerce-protocol spec json-schema capabilities` for the capabilities JSON schema ## Conceptual Architecture ### What Capability Negotiation Does ACP agents and merchants may support different features. Capability negotiation allows them to **dynamically discover** what they both support, so the session uses only mutually available features. ### How It Works 1. **Agent sends capabilities** — In the `create` request, the agent includes a `capabilities` object listing what it supports 2. **Merchant responds with capabilities** — The merchant intersects with its own capabilities and returns what's active for this session 3. **Intersection governs the session** — Only mutually supported features are used ### Capabilities Object Structure The capabilities object contains: …
Read the whole file at its exact version.
How to install
mdr add orcaqubits/agentic-commerce-skills-plugins/acp-capability-negotiation@sha256:29bc428e76c5a3f6The 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_shlksvlvhsselieo)
4 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 (3848 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_shlksvlvhsselieo GET https://markdownregistry.com/api/v1/resolve?ref=orcaqubits/agentic-commerce-skills-plugins/acp-capability-negotiation GET https://markdownregistry.com/api/v1/blob/29bc428e76c5a3f61e84d03838ab2ee838a9fb0ce417ce89376dfe092a2d2f85
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.