Add Deside plugin for Solana messaging via MCP

[DesideApp]

Summary

This PR adds a new GOAT plugin for Deside messaging on Solana via Deside MCP.

It introduces @goat-sdk/plugin-deside, backed by the published shared SDK @desideapp/mcp-sdk.

What’s included

• New plugin package: @goat-sdk/plugin-deside
• Solana wallet-based auth against Deside MCP
• Tool coverage for:
  • deside_send_dm
  • deside_read_dms
  • deside_mark_dm_read
  • deside_list_conversations
  • deside_get_user_info
  • deside_get_my_identity
  • deside_search_agents
• Example by use case for Solana messaging

External dependency

This plugin uses the published Deside MCP SDK:

• npm: @desideapp/mcp-sdk
• repo: https://github.com/DesideApp/mcp-sdk

Validation

Validated against the production MCP endpoint:

• https://mcp.deside.io/mcp

Checks completed:

• pnpm turbo build --filter @goat-sdk/plugin-deside
• example typecheck
• production smoke covering:
  • auth/session bootstrap
  • identity
  • user info
  • agent discovery
  • conversations
  • read messages
  • send DM
  • mark read
  • invalid input handling
  • refresh/auth recovery

Notes

• The GOAT monorepo pre-commit currently fails on unrelated @goat-sdk/plugin-meteora checks; plugin-specific build and smoke for this contribution passed

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Latest commit: e2e4b95

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