spec SKILL.md skillA
spec from squillo/aph is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add squillo/aph/spec@git:20260919.e90d1c5Pins git:20260919.e90d1c5 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- squillo/aph
- Path
skills/spec/SKILL.md- Versions recorded
- 6
- Latest version
- git:20260919.e90d1c5, committed Sep 19, 2026
- First version recorded
- Aug 29, 2026
- Size
- 61,084 bytes
- Repository stars
- 11
- License
- Apache-2.0
APH (Agent per Human) protocol crash course and reference. Use when working with APH, NotarizationEnvelope JSON, envelope validation or verification, notarization flows, a Delegation Mandate or Communication Mandate, the notary service, the "agent driver's license" model, APH error codes (APH_E001..APH_E020), signing profiles (eddsa-jcs-2022, ecdsa-jcs-2019, detached JWS), notary public-key discovery (did:key, did:web, DNS TXT), channel kinds, or the A2A notarization extension. Also covers…
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
# APH v0.1 — working crash course APH (Agent per Human) notarizes outbound agent communications: a human-authorized Notary Service issues a W3C Verifiable Credential 2.0 (`NotarizationEnvelope`) that binds a specific outbound payload (by SHA-256), channel, agent, and policy decision to a human principal's authority. The mental model is a **driver's license for agents** (spec §1.1): the human is the issuing authority, the notary is the DMV, every credential carries a bounded scope, and it is revocable and portable across organizations via public key discovery. ## Repo map - `spec/aph-0.1.md` — the normative spec. Key sections: §1.1 mental model, §5 Roles + Operations, §6 Mandates, §7 The Notarization Envelope, §8 Signing + Verification, §8.4 Notary Key Material + Public-Key Discovery, §9 Flow State Machines, §10 Composition with Adjacent Protocols, §11 Error Taxonomy. - `spec/a2a-extension.md` — how agents advertise APH on an A2A AgentCard. Pins `APH_EXTENSION_URI = aph://extensions/notarization/v1` (exact byte equality, opaque, never dereferenced). …
Read the whole file at its exact version.
How to install
mdr add squillo/aph/spec@sha256:f012211911c49410The line at the top of this page pins the label git:20260919.e90d1c5, 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_6xnkb7ev5y6p4jov)
6 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 6 versions of this file, between Aug 29, 2026 and Sep 19, 2026, about one every 4 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20260919.e90d1c5 latest | 2026-09-19 | e90d1c5 | 61,084 B | A | view · diff |
| git:20260829.82ca08f | 2026-08-29 | 82ca08f | 60,401 B | A | view · diff |
| git:20260829.317063b | 2026-08-29 | 317063b | 60,214 B | A | view · diff |
| git:20260829.a3db567 | 2026-08-29 | a3db567 | 59,839 B | A | view · diff |
| git:20260829.bc38105 | 2026-08-29 | bc38105 | 59,204 B | A | view · diff |
| git:20260829.ce4302f | 2026-08-29 | ce4302f | 59,133 B | A | view |
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 (61084 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
squillo/aph · 11 stars · license Apache-2.0 · pushed 2026-09-26 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_6xnkb7ev5y6p4jov GET https://markdownregistry.com/api/v1/resolve?ref=squillo/aph/spec GET https://markdownregistry.com/api/v1/blob/f012211911c49410e87dddd739b5a5d9b12789a23d200973be0f46f417519bc4
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.