proof-of-human SKILL.md skillA
proof-of-human from sanctifai/skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add sanctifai/skills/proof-of-human@v2.0.0Pins v2.0.0 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- sanctifai/skills
- Path
plugins/sanctifai-trust/skills/proof-of-human/SKILL.md- Versions recorded
- 4
- Latest version
- v2.0.0, committed Sep 15, 2026
- First version recorded
- Sep 8, 2026
- Size
- 6,515 bytes
- Repository stars
- 6
- License
- Apache-2.0
Seal that a WebAuthn-authed human participated and attested an exact payload. Outsiders can verify the receipt without trusting your DB. When WebAuthn cannot run in-card, mint via this Chat bridge (POST attestation → Chrome approve_url → poll certificate_url).
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
# Proof of Human
SanctifAI Trust Chat bridge — one of three Trust surfaces (Embedded, Chrome
extension, Chat bridge). All three produce the same participation +
`certificate_url`. This skill is the chat path: you cannot run WebAuthn
in-card, so you mint here, a human opens Chrome, and you poll for the cert.
**Default `APP_BASE_URL`:** `https://bridge.trust.sanctifai.com`
Always use the `approve_url` the API returns. Never invent `localhost` links.
The agent never holds `TRUST_API_KEY` — the hosted bridge does. Self-host this
plugin only if you need a custom allowlisted origin.
Embedded and Extension: https://trust.sanctifai.com/agents/trust/skill.md
## Flow
```
1. POST {APP_BASE_URL}/api/v1/attestations
2. Give the human approve_url — they open it in Chrome
3. Poll GET {APP_BASE_URL}/api/v1/attestations/{id}
or GET {APP_BASE_URL}/api/v1/attestations/{id}/wait
4. When status is completed, paste certificate_url
```
## 1. Create
`POST {APP_BASE_URL}/api/v1/attestations`
```json
{
"task_type": "GEN",
"domain": "GEN",
"task_subtype": "Chat approval",
"requesting_agent": "Sebastian - Dev Bot",
"taskData": { "summary": "opaque task payload" },
…Read the whole file at its exact version.
How to install
mdr add sanctifai/skills/proof-of-human@sha256:80aeae56b5269900The line at the top of this page pins the label v2.0.0, 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_sghhtlegczyv44u3)
3 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 4 versions of this file, between Sep 8, 2026 and Sep 15, 2026, about one every 2 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| v2.0.0 latest | 2026-09-15 | aacc345 | 6,515 B | A | view · diff |
| v2.0.0 | 2026-09-15 | 6754ee0 | 6,533 B | A | view · diff |
| v2.0.0 | 2026-09-08 | 3289c01 | 6,654 B | A | view · diff |
| v2.0.0 | 2026-09-08 | a5e8973 | 6,647 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 (6515 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
sanctifai/skills · 6 stars · license Apache-2.0 · pushed 2026-09-15 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_sghhtlegczyv44u3 GET https://markdownregistry.com/api/v1/resolve?ref=sanctifai/skills/proof-of-human GET https://markdownregistry.com/api/v1/blob/80aeae56b52699005a360de7765c98fbea8aadbf5a507c2144635ef2d4825f5d
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.