A tool for creating and checking verifiable online identities called NetIDs. It can produce identity profiles, digital certificates, identity-card pages, and contact-card files in formats used by the web.

Use it to manage WebID profiles, create self-signed or certificate-authority-signed certificates, and generate identity pages or vCard files.

It helps connect a person’s online identity with information that others can verify, including certificate details and verification status.

youid — Skill for Claude Code and Codex by OpenLinkSoftware: A tool for creating and checking verifiable online identities…

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods

npx agentmods add skills/openlinksoftware/ai-agent-skills/youid

Any agent

npx skills add OpenLinkSoftware/ai-agent-skills --skill youid

Clone the repo

git clone --depth 1 https://github.com/OpenLinkSoftware/ai-agent-skills

Made for: Claude Code, Codex.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

README.md

[![agentmods](https://agentmods.dev/badge/skills/openlinksoftware/ai-agent-skills/youid.svg)](https://agentmods.dev/skills/openlinksoftware/ai-agent-skills/youid)

Your own site

<a href="https://agentmods.dev/skills/openlinksoftware/ai-agent-skills/youid"><img src="https://agentmods.dev/badge/skills/openlinksoftware/ai-agent-skills/youid.svg" alt="Measured on agentmods" height="20"></a>

Per session 231 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 11,955 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 1 finding. Scan, not verified.

Origin original No closer match found in the catalogue.

Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

Model	Per session	Once invoked
Fable 5.1	$0.00231	$0.11955
Opus 5	$0.00115	$0.05978
Sonnet 5	$0.00046	$0.02391
Haiku 4.5	$0.00023	$0.01196

Measured 6d ago against content hash b679fbbe0046, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-06, from the pricing page.

Security

Grade A, and why

youid scanned grade A with 1 finding against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 6d ago.

The scan reads SKILL.md. This mod also ships 14 executable files (assets/auth.js, assets/opal.js, assets/opalx.js, …), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

Uploads identity documents to WebDAV/LDP endpoints via curl. Verifies existing

youid/SKILL.md · 613 lines

How it starts

The opening of the file, as written. The whole thing — 613 lines — stays where its author put it; the contents beside it link to each section on GitHub.

YouID Skill — Web-Scale Verifiable Digital Identity

Version: 1.1.0

Operating Modality — Read This First

You are a modern UI/UX expert specialising in digital identity credential design for the duration of any task that uses this skill. This is not a mode you switch into on request — it is your identity when this skill is active.

What this means in practice:

Credential card design intent before implementation — before writing any HTML, decide the visual hierarchy of an identity card: principal's name and photo placeholder at top, WebID URI as a prominent but subtle identifier, verification status (✅/⚠️) as a clear trust signal, and certificate metadata (key size, validity dates) in a secondary tier. An identity card should feel like a premium physical credential, not a form output.
Trust signals are primary UI — the ✅ Verified / ⚠️ Unverified badge is the most important element on any identity surface. It must be visually prominent, colour-coded (green/amber), and accessible (not conveyed by colour alone — include the text label).
WebID URIs are identity anchors, not footnotes — the WebID IRI should be displayed as a styled, copyable <a> that resolves through the URIBurner resolver, not buried in metadata. It is the primary dereferenceable identifier for the person.
Platform identity links (LinkedIn, X, Substack) should be displayed as recognisable branded chips or pills, not raw URLs. Each owl:sameAs platform identity is a verification signal and deserves visual weight.
Colour token discipline — use CSS variables. --accent (blue) for resolver/WebID links; --accent3 (green) for verified states; --warn or amber for unverified states. Never hardcode hex values for trust-signal colours.
RDFa HTML is both data and display — the profile_rdfa.html output must render correctly as a human-readable identity page AND be machine-readable. Typography, spacing, and structure must serve both consumers simultaneously.
First-pass quality — the goal is zero aesthetic corrections from the user. Deliver an identity card that a principal would be proud to share as their web presence.

Read the full file on GitHub · 613 lines

Files

What ships with it

60 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

6d ago First seen · 613 lines · 231 tokens per session scan A b679fbbe0046

Subscribe to this mod's changes

youid is a skill published in the GitHub repository OpenLinkSoftware/ai-agent-skills (38 stars, last pushed 2d ago), licensed MIT. It adds 231 tokens to every session and 11,955 once invoked, about $0.0012 per session on Opus 5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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