How do I install the Skill 10 Identity Did skill?

Run npx skillmds@latest add vaquarkhan/skill-10-identity-did in your terminal (requires Node.js), paste this page's agent-chat prompt into Claude, Cursor, or any MCP-connected agent, or download the SKILL.md file and copy it into your agent's skills directory.

Is Skill 10 Identity Did safe to use?

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Which AI agents work with Skill 10 Identity Did?

This skill is tagged as working with Claude Code, Claude.ai, OpenAI Codex. SKILL.md is an open format, so most agents that read a skills directory can load it too.

Is Skill 10 Identity Did free to use?

Yes. Installing skills from SkillMD is free, and the skill stays under its author's original license.

Who published Skill 10 Identity Did?

vaquarkhan (@vaquarkhan) published this skill. Their other Agent Skills are listed on their SkillMD profile.

Skill 10 Identity Did by vaquarkhan

Name: Skill 10 Identity Did
Author: vaquarkhan

File contents

Identity (DID)

When to Use

Creating or resolving Decentralized Identifiers (DIDs)
Issuing/verifying Verifiable Credentials (VCs)
Registering or resolving ENS names
Implementing ZK-KYC (prove eligibility without revealing PII)
Working with on-chain attestations (EAS, Verax)

Prerequisites

MCP: blockchain-rpc-server, compliance-screening-server
Skill-09 for KYC/regulatory context

Workflow

1. DID Methods

Method	Format	Chain
`did:ethr`	`did:ethr:0x...`	Ethereum
`did:pkh`	`did:pkh:eip155:1:0x...`	Multi-chain
`did:ion`	Sidetree on Bitcoin	Bitcoin L2
`did:web`	HTTPS-hosted	Off-chain

Create DID document with verification methods (public keys) and service endpoints.

2. Verifiable Credentials

Issuer → signs VC → Holder stores → Verifier requests proof

Use W3C VC Data Model v2
Sign with EthereumEip712Signature2021 or Ed25519Signature2020
Verify: check signature, revocation status, schema compliance

3. ENS

Resolve: eth_resolver.resolve(name, data)
Register via ETH Registrar Controller
Set records: address, text (email, url, avatar), contenthash (IPFS)
Reverse resolution: set addr.reverse record

4. ZK-KYC

Prove attributes without revealing identity:

User completes KYC with issuer off-chain
Issuer provides signed credential or Semaphore identity
User generates ZK proof of membership/eligibility
Verifier checks proof on-chain (no PII exposed)

Protocols: Polygon ID, World ID, Semaphore, Sismo

5. On-Chain Attestations

Ethereum Attestation Service (EAS):

eas.attest(AttestationRequest({
  schema: schemaUID,
  data: AttestationRequestData({ recipient, expirationTime, revocable, refUID, data, value })
}));

Use for reputation, KYC status, guild membership, and compliance proofs.

Privacy Rules

Never store PII on-chain
Minimize credential disclosure (selective disclosure proofs)
Honor GDPR right-to-erasure for off-chain identity data

References

references/did-methods.md
references/eas-schemas.md

---name: skill-10-identity-diddescription: Manages decentralized identity including DIDs, verifiable credentials, ENS names, ZK-KYC, and on-chain attestations. Use for identity verification, name resolution, or credential workflows.---# Identity (DID)## When to Use- Creating or resolving Decentralized Identifiers (DIDs)- Issuing/verifying Verifiable Credentials (VCs)- Registering or resolving ENS names- Implementing ZK-KYC (prove eligibility without revealing PII)- Working with on-chain attestations (EAS, Verax)## Prerequisites- MCP: `blockchain-rpc-server`, `compliance-screening-server`- Skill-09 for KYC/regulatory context## Workflow### 1. DID Methods| Method | Format | Chain ||--------|--------|-------|| `did:ethr` | `did:ethr:0x...` | Ethereum || `did:pkh` | `did:pkh:eip155:1:0x...` | Multi-chain || `did:ion` | Sidetree on Bitcoin | Bitcoin L2 || `did:web` | HTTPS-hosted | Off-chain |Create DID document with verification methods (public keys) and service endpoints.### 2. Verifiable Credentials```Issuer → signs VC → Holder stores → Verifier requests proof```- Use W3C VC Data Model v2- Sign with `EthereumEip712Signature2021` or `Ed25519Signature2020`- Verify: check signature, revocation status, schema compliance### 3. ENS- Resolve: `eth_resolver.resolve(name, data)`- Register via ETH Registrar Controller- Set records: address, text (email, url, avatar), contenthash (IPFS)- Reverse resolution: set `addr.reverse` record### 4. ZK-KYCProve attributes without revealing identity:1. User completes KYC with issuer off-chain2. Issuer provides signed credential or Semaphore identity3. User generates ZK proof of membership/eligibility4. Verifier checks proof on-chain (no PII exposed)Protocols: Polygon ID, World ID, Semaphore, Sismo### 5. On-Chain Attestations**Ethereum Attestation Service (EAS):**```solidityeas.attest(AttestationRequest({ schema: schemaUID, data: AttestationRequestData({ recipient, expirationTime, revocable, refUID, data, value })}));```Use for reputation, KYC status, guild membership, and compliance proofs.## Privacy Rules- Never store PII on-chain- Minimize credential disclosure (selective disclosure proofs)- Honor GDPR right-to-erasure for off-chain identity data## References- `references/did-methods.md`- `references/eas-schemas.md`

Frequently asked questions

Skill 10 Identity Did