feat: add @elizaos/plugin-xproof

[jasonxkensei]

Adds xProof — blockchain proof of existence plugin for ElizaOS agents.

Certify agent outputs on MultiversX blockchain. Supports text, hashes,
batch certification, and proof verification.

Registry checklist

• JSON format is valid
• Entry is in alphabetical order (between plugin-xmtp and plugin-youtube-to-text)
• Plugin repo is public: https://github.com/jasonxkensei/plugin-xproof
• Main branch exists
• Repo has images/ folder (logo.jpg + banner.jpg)
• Repo has package.json
• elizaos-plugins topic — to add

Links

• Repo: https://github.com/jasonxkensei/plugin-xproof
• Homepage: https://xproof.app
• MCP Registry: https://registry.modelcontextprotocol.io/v0/servers?search=xproof

Summary by CodeRabbit

• New Features
  • Added a new plugin to the available registry.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro

Run ID: 3c2a7eae-9415-4e50-9101-96f70aeff899

📥 Commits

Reviewing files that changed from the base of the PR and between 10546b1 and 59c90c2.

📒 Files selected for processing (1)

• index.json

✅ Files skipped from review due to trivial changes (1)

• index.json

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Walkthrough

A new plugin entry @elizaos/plugin-xproof referencing github:jasonxkensei/plugin-xproof was added to the public index.json registry. File now ends with a newline; no other entries were modified.

Changes

Cohort / File(s)	Summary
Plugin Registry index.json	Added @elizaos/plugin-xproof → github:jasonxkensei/plugin-xproof; ensured file ends with a newline.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~2 minutes

Poem

🐰 I hopped to the registry, quick and spry,
A new plugin sparkles beneath the sky,
xproof arrived from a GitHub trail,
One tidy line — a tiny tale,
I nibble code crumbs and dance with a sigh.

🚥 Pre-merge checks | ✅ 3

✅ Passed checks (3 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title 'feat: add @elizaos/plugin-xproof' accurately summarizes the main change: adding a new plugin entry to the registry.
Description check	✅ Passed	The description covers the plugin purpose, includes a completed registry checklist addressing template requirements, and provides relevant links. Minimal sections are unfilled.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

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✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

📝 Coding Plan

• Generate coding plan for human review comments

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