Agent

[thokra-nav]

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[Copilot]

Pull request overview

This PR introduces an AI agent service with Model Context Protocol (MCP) integration for the Nais platform. The agent provides GraphQL schema exploration tools and chat capabilities with retrieval-augmented generation (RAG) support.

Changes:

• New pkg/mcp package implementing MCP tools for GraphQL schema exploration and query execution
• New internal/agent package providing AI chat orchestration with tool calling, RAG document search, and conversation management
• RAG index generator tool that processes documentation into DuckDB embeddings for semantic search
• Database schema for storing agent conversations and messages
• Configuration for Vertex AI integration and agent features

Reviewed changes

Copilot reviewed 54 out of 57 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
pkg/mcp/tools/*.go	MCP tool definitions, registry, and execution handlers for schema exploration and GraphQL operations
pkg/mcp/server.go	MCP server implementation with stdio/HTTP/SSE transports
pkg/mcp/executor.go	Direct tool executor without MCP protocol overhead for hosted agents
internal/agent/*.go	Agent orchestrator, conversation management, MCP integration, and HTTP handlers
internal/agent/chat/*.go	Chat client interfaces and streaming implementations
internal/agent/rag/*.go	RAG document search with DuckDB and embedding support
internal/cmd/gen_rag_index/*.go	Tool to generate DuckDB index from MkDocs search index
internal/database/migrations/0057_agent_conversations.sql	Database schema for agent conversations and messages
internal/cmd/api/api.go	Integration of agent service into main API server
go.mod	New dependencies for DuckDB, Vertex AI, and MCP

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Suggested change

	chatClient.Close()
	if cerr := chatClient.Close(); cerr != nil {
	log.WithError(cerr).Warn("closing chat client")
	}