docs: add Community Plugins section — @liqdlad/solana-agent-kit-plugin (A2A-Swap)

[liqdlad-rgb]

Summary

Adds a new ## 🌐 Community Plugins section to the README, placed immediately after the official Plugin Installation section. The section documents @liqdlad/solana-agent-kit-plugin — a production-ready, drop-in plugin for A2A-Swap.

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Why A2A-Swap belongs in this list

A2A-Swap is an agent-native constant-product AMM deployed on Solana mainnet, purpose-built for autonomous AI agents. It follows the exact SAK v2 plugin architecture and provides unique capabilities no other AMM plugin currently offers:

Feature	A2A-Swap	Jupiter / Raydium
Compute units	~40,000 CU	200k–400k+
Protocol fee	Fixed 0.020%	Variable
Execution	Single on-chain instruction	Multi-hop
Auto-compound fees	Yes	No
On-chain capability card	Yes	No
Ideal for	Agent loops, high-frequency	Best-price routing

The plugin:

• Implements the SAK v2 Plugin interface exactly (name, methods, actions, initialize(agent))
• Registers 5 AI actions with 12–13 LLM-optimized similes each (Zod-validated)
• Provides 8 programmatic methods on agent.methods
• Works out of the box with createVercelAITools, createLangchainTools, and createOpenAITools
• Uses KeypairWallet for server-side agent signing (standard SAK pattern)

Links

• npm: https://www.npmjs.com/package/@liqdlad/solana-agent-kit-plugin
• GitHub: https://github.com/liqdlad-rgb/a2a-swap
• Program (mainnet): 8XJfG4mHqRZjByAd7HxHdEALfB8jVtJVQsdhGEmysTFq (Solscan)
• SOL/USDC pool: BtBL5wpMbmabFimeUmLtjZAAeh4xWWf76NSpefMXb4TC (live mainnet)

What changed

Single section added to README.md between ## 📦 Plugin Installation and ## Quick Start:

## 🌐 Community Plugins

Third-party plugins that extend Solana Agent Kit with additional protocols and capabilities:

### A2A-Swap (`@liqdlad/solana-agent-kit-plugin`)
...

No other files were modified. No dependencies added to the monorepo.

[liqdlad-rgb]

Hi! Just wanted to check in on this — the plugin is live and being used in production.

Current state:

• Published on npm as @liqdlad/solana-agent-kit-plugin v1.0.0
• Implements the SAK v2 Plugin interface ({ name, methods, actions, initialize(agent) }) — drop-in via .use(A2ASwapPlugin)
• 5 AI actions + 8 methods covering swap, simulate, provide liquidity, remove liquidity, claim fees, pool info, positions, fees
• Backing program (8XJfG4mHqRZjByAd7HxHdEALfB8jVtJVQsdhGEmysTFq) is deployed and verified on Solana mainnet
• Three live pools: SOL/USDC, SOL/$ELIZAOS, SOL/$MOLTID

Happy to make any changes to the docs format or wording if it doesnt fit the style youre going for. Thanks for considering it!