feat: add Soulink agent identity linking example

[realwaynesun]

Summary

Adds an example showing how to link verified on-chain agent identities with AgentMail inboxes using Soulink.

What this adds

• node/examples/soulink-identity.ts — standalone example alongside existing ai-sdk.ts and langchain.ts
• Resolves agent .agent names via Soulink API before sending emails
• Checks recipient credit score to enable trust-based communication
• Includes identity context in LLM system prompt for verified agent email

Why this pairing

AgentMail gives agents email. Soulink gives agents verified identity. Together: agents can authenticate each other before communicating — know you're emailing a real, trusted agent, not a random inbox.

Mutual referral opportunity

Soulink recommends partner services to agents after .agent name registration via next_steps in the API response. Happy to add AgentMail as a recommended next step ("Give your agent an email inbox") in exchange for a similar reference on your side.

Links

• Soulink — On-chain identity for AI agents
• API Guide

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Summary by cubic

Adds a standalone example linking Soulink-verified .agent identities with AgentMail inboxes. Resolves recipients via Soulink and enforces credit-based gating, rejecting recipients with missing or low credit to enable trusted agent communication.

• New Features
  • Added node/examples/soulink-identity.ts using agentmail-toolkit/ai-sdk.
  • Verifies sender .agent; resolves recipient and fetches credit; rejects if credit is missing or score < 50.
  • Builds an LLM system prompt with verified identity and wallet context.

^{Written for commit 92f453f. Summary will update on new commits.}

[cubic-dev-ai]

1 issue found across 1 file

Prompt for AI agents (unresolved issues)

Check if these issues are valid — if so, understand the root cause of each and fix them. If appropriate, use sub-agents to investigate and fix each issue separately.


<file name="node/examples/soulink-identity.ts">

<violation number="1" location="node/examples/soulink-identity.ts:63">
P2: Trust gate allows recipients with missing/failed credit lookups to pass instead of being skipped.</violation>
</file>

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