awesome  - here you have my initial roadmap - i havent even started yet # Go Learning Roadmap via RAG Agent Development

## Phase 1: Go Fundamentals (Week 1-2)
*Build basic CLI foundation*

### Core Concepts to Learn:
- **Variables & Types**: `string`, `int`, `[]byte`, `map[string]interface{}`
- **Functions**: Basic functions, methods, error handling
- **Structs**: Data modeling for your RAG responses
- **Interfaces**: `io.Reader`, `io.Writer`, `error` interface
- **Packages**: Organizing code, imports, `go mod`

### Mini-Project: Simple Chat CLI
```go
// What you'll build in Phase 1
package main

import (
    "bufio"
    "fmt"
    "os"
    "strings"
)

type ChatBot struct {
    name string
    responses map[string]string
}

func (c *ChatBot) Respond(input string) string {
    // Simple keyword matching
    for keyword, response := range c.responses {
        if strings.Contains(strings.ToLower(input), keyword) {
            return response
        }
    }
    return "I don't understand that yet."
}

func main() {
    bot := ChatBot{
        name: "RagBot",
        responses: map[string]string{
            "hello": "Hi! I'm learning Go with you!",
            "help":  "I can chat with you while we build my RAG capabilities.",
        },
    }
    
    scanner := bufio.NewScanner(os.Stdin)
    fmt.Printf("Chat with %s (type 'quit' to exit):\n", bot.name)
    
    for {
        fmt.Print("> ")
        scanner.Scan()
        input := scanner.Text()
        
        if input == "quit" {
            break
        }
        
        response := bot.Respond(input)
        fmt.Printf("%s: %s\n", bot.name, response)
    }
}
```

### Go Concepts You'll Learn:
- **Struct methods**: `(c *ChatBot) Respond()`
- **Maps**: `map[string]string`
- **String manipulation**: `strings` package
- **User input**: `bufio.Scanner`
- **Control flow**: `for` loops, `if` statements

## Phase 2: HTTP & APIs (Week 3-4)
*Add web interface and external integrations*

### New Concepts:
- **HTTP servers**: `net/http`, `http.Handler`
- **JSON handling**: `encoding/json`, struct tags
- **Error handling**: Proper error patterns
- **Context**: `context.Context` for cancellation
- **Middleware**: HTTP middleware patterns

### Mini-Project: REST API for Chat
```go
// What you'll build in Phase 2
package main

import (
    "encoding/json"
    "fmt"
    "net/http"
    "log"
)

type ChatRequest struct {
    Message string `json:"message"`
}

type ChatResponse struct {
    Reply string `json:"reply"`
    Model string `json:"model"`
}

type RagServer struct {
    model string
}

func (s *RagServer) chatHandler(w http.ResponseWriter, r *http.Request) {
    if r.Method != http.MethodPost {
        http.Error(w, "Method not allowed", http.StatusMethodNotAllowed)
        return
    }
    
    var req ChatRequest
    if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
        http.Error(w, "Invalid JSON", http.StatusBadRequest)
        return
    }
    
    // Simulate RAG response
    response := ChatResponse{
        Reply: fmt.Sprintf("You said: %s", req.Message),
        Model: s.model,
    }
    
    w.Header().Set("Content-Type", "application/json")
    json.NewEncoder(w).Encode(response)
}

func main() {
    server := &RagServer{model: "phi-4-mini"}
    
    http.HandleFunc("/chat", server.chatHandler)
    http.HandleFunc("/health", func(w http.ResponseWriter, r *http.Request) {
        w.WriteHeader(http.StatusOK)
        w.Write([]byte("OK"))
    })
    
    log.Println("Server starting on :8080")
    log.Fatal(http.ListenAndServe(":8080", nil))
}
```

### Go Concepts You'll Learn:
- **HTTP handlers**: `http.HandlerFunc`
- **JSON marshaling**: `json.Marshal`/`json.Unmarshal`
- **Struct tags**: `json:"message"`
- **HTTP middleware**: Custom middleware functions
- **Error handling**: Proper error responses

## Phase 3: Concurrency & Goroutines (Week 5-6)
*Handle multiple requests and background tasks*

### New Concepts:
- **Goroutines**: `go` keyword, concurrent execution
- **Channels**: Communication between goroutines
- **Select**: Non-blocking channel operations
- **Sync package**: `sync.WaitGroup`, `sync.Mutex`
- **Context**: Cancellation and timeouts

### Mini-Project: Concurrent RAG Processing
```go
// What you'll build in Phase 3
package main

import (
    "context"
    "fmt"
    "sync"
    "time"
)

type RagQuery struct {
    ID      string
    Query   string
    Result  chan string
}

type RagProcessor struct {
    queries chan RagQuery
    workers int
}

func NewRagProcessor(workers int) *RagProcessor {
    return &RagProcessor{
        queries: make(chan RagQuery, 100),
        workers: workers,
    }
}

func (r *RagProcessor) Start(ctx context.Context) {
    var wg sync.WaitGroup
    
    for i := 0; i < r.workers; i++ {
        wg.Add(1)
        go r.worker(ctx, &wg, i)
    }
    
    go func() {
        wg.Wait()
        close(r.queries)
    }()
}

func (r *RagProcessor) worker(ctx context.Context, wg *sync.WaitGroup, id int) {
    defer wg.Done()
    
    for {
        select {
        case query, ok := <-r.queries:
            if !ok {
                return
            }
            
            // Simulate RAG processing
            time.Sleep(100 * time.Millisecond)
            response := fmt.Sprintf("Worker %d processed: %s", id, query.Query)
            
            select {
            case query.Result <- response:
            case <-ctx.Done():
                return
            }
            
        case <-ctx.Done():
            return
        }
    }
}

func (r *RagProcessor) Query(ctx context.Context, query string) (string, error) {
    result := make(chan string, 1)
    
    select {
    case r.queries <- RagQuery{
        ID:     fmt.Sprintf("%d", time.Now().UnixNano()),
        Query:  query,
        Result: result,
    }:
    case <-ctx.Done():
        return "", ctx.Err()
    }
    
    select {
    case response := <-result:
        return response, nil
    case <-ctx.Done():
        return "", ctx.Err()
    }
}
```

### Go Concepts You'll Learn:
- **Channels**: `chan string`, `make(chan Type)`
- **Select statements**: Non-blocking operations
- **Worker pools**: Concurrent processing patterns
- **Context cancellation**: `context.Context`
- **Synchronization**: `sync.WaitGroup`

## Phase 4: File I/O & Obsidian Integration (Week 7-8)
*Monitor and process your Obsidian vault*

### New Concepts:
- **File operations**: `os.File`, `filepath.Walk`
- **File watching**: `fsnotify` package
- **Regular expressions**: `regexp` package
- **Text processing**: `strings`, `bytes` packages
- **Markdown parsing**: Third-party libraries

### Mini-Project: Obsidian Vault Monitor
```go
// What you'll build in Phase 4
package main

import (
    "fmt"
    "os"
    "path/filepath"
    "regexp"
    "strings"
    "log"
    
    "github.com/fsnotify/fsnotify"
)

type ObsidianVault struct {
    path    string
    watcher *fsnotify.Watcher
    notes   map[string]*Note
}

type Note struct {
    Path     string
    Title    string
    Content  string
    Links    []string
    Tags     []string
    Modified time.Time
}

func NewObsidianVault(path string) (*ObsidianVault, error) {
    watcher, err := fsnotify.NewWatcher()
    if err != nil {
        return nil, err
    }
    
    return &ObsidianVault{
        path:    path,
        watcher: watcher,
        notes:   make(map[string]*Note),
    }, nil
}

func (v *ObsidianVault) parseNote(filePath string) (*Note, error) {
    content, err := os.ReadFile(filePath)
    if err != nil {
        return nil, err
    }
    
    note := &Note{
        Path:    filePath,
        Title:   strings.TrimSuffix(filepath.Base(filePath), ".md"),
        Content: string(content),
    }
    
    // Extract wikilinks [[link]]
    linkRegex := regexp.MustCompile(`\[\[([^\]]+)\]\]`)
    matches := linkRegex.FindAllStringSubmatch(note.Content, -1)
    for _, match := range matches {
        note.Links = append(note.Links, match[1])
    }
    
    // Extract tags #tag
    tagRegex := regexp.MustCompile(`#([a-zA-Z0-9_/-]+)`)
    matches = tagRegex.FindAllStringSubmatch(note.Content, -1)
    for _, match := range matches {
        note.Tags = append(note.Tags, match[1])
    }
    
    return note, nil
}

func (v *ObsidianVault) Watch() error {
    err := filepath.Walk(v.path, func(path string, info os.FileInfo, err error) error {
        if err != nil {
            return err
        }
        
        if info.IsDir() {
            return v.watcher.Add(path)
        }
        
        if strings.HasSuffix(path, ".md") {
            note, err := v.parseNote(path)
            if err != nil {
                log.Printf("Error parsing note %s: %v", path, err)
                return nil
            }
            v.notes[path] = note
        }
        
        return nil
    })
    
    if err != nil {
        return err
    }
    
    go func() {
        for {
            select {
            case event := <-v.watcher.Events:
                if strings.HasSuffix(event.Name, ".md") {
                    fmt.Printf("Note modified: %s\n", event.Name)
                    if note, err := v.parseNote(event.Name); err == nil {
                        v.notes[event.Name] = note
                    }
                }
            case err := <-v.watcher.Errors:
                log.Printf("Watcher error: %v", err)
            }
        }
    }()
    
    return nil
}

func (v *ObsidianVault) FindConnections(notePath string) []string {
    note, exists := v.notes[notePath]
    if !exists {
        return nil
    }
    
    var connections []string
    for _, link := range note.Links {
        for path, linkedNote := range v.notes {
            if linkedNote.Title == link {
                connections = append(connections, path)
                break
            }
        }
    }
    
    return connections
}
```

### Go Concepts You'll Learn:
- **File I/O**: `os.ReadFile`, `os.WriteFile`
- **Path manipulation**: `filepath` package
- **Regular expressions**: `regexp.MustCompile`
- **File watching**: `fsnotify` third-party package
- **String processing**: Advanced `strings` operations

## Phase 5: Vector Database & RAG (Week 9-10)
*Implement real RAG functionality*

### New Concepts:
- **HTTP clients**: `net/http.Client`
- **Third-party APIs**: Integrating with vector databases
- **Embedding**: Text-to-vector conversion
- **JSON-RPC**: API communication patterns
- **Error handling**: Robust error patterns

### Mini-Project: Simple Vector Search
```go
// What you'll build in Phase 5
package main

import (
    "context"
    "encoding/json"
    "fmt"
    "net/http"
    "bytes"
)

type VectorDB struct {
    client *http.Client
    baseURL string
}

type Document struct {
    ID      string    `json:"id"`
    Content string    `json:"content"`
    Vector  []float32 `json:"vector"`
}

type SearchRequest struct {
    Vector []float32 `json:"vector"`
    Limit  int       `json:"limit"`
}

type SearchResponse struct {
    Results []SearchResult `json:"results"`
}

type SearchResult struct {
    Document Document `json:"document"`
    Score    float32  `json:"score"`
}

func NewVectorDB(baseURL string) *VectorDB {
    return &VectorDB{
        client:  &http.Client{},
        baseURL: baseURL,
    }
}

func (v *VectorDB) Search(ctx context.Context, query []float32, limit int) ([]SearchResult, error) {
    reqBody := SearchRequest{
        Vector: query,
        Limit:  limit,
    }
    
    jsonBody, err := json.Marshal(reqBody)
    if err != nil {
        return nil, fmt.Errorf("marshal request: %w", err)
    }
    
    req, err := http.NewRequestWithContext(ctx, "POST", v.baseURL+"/search", bytes.NewBuffer(jsonBody))
    if err != nil {
        return nil, fmt.Errorf("create request: %w", err)
    }
    
    req.Header.Set("Content-Type", "application/json")
    
    resp, err := v.client.Do(req)
    if err != nil {
        return nil, fmt.Errorf("make request: %w", err)
    }
    defer resp.Body.Close()
    
    if resp.StatusCode != http.StatusOK {
        return nil, fmt.Errorf("unexpected status: %d", resp.StatusCode)
    }
    
    var searchResp SearchResponse
    if err := json.NewDecoder(resp.Body).Decode(&searchResp); err != nil {
        return nil, fmt.Errorf("decode response: %w", err)
    }
    
    return searchResp.Results, nil
}

type RagEngine struct {
    vectorDB *VectorDB
    llm      LLMClient
}

func (r *RagEngine) Query(ctx context.Context, question string) (string, error) {
    // 1. Convert question to vector (simplified)
    queryVector := r.textToVector(question)
    
    // 2. Search for relevant documents
    results, err := r.vectorDB.Search(ctx, queryVector, 5)
    if err != nil {
        return "", fmt.Errorf("vector search: %w", err)
    }
    
    // 3. Build context from search results
    context := ""
    for _, result := range results {
        context += result.Document.Content + "\n\n"
    }
    
    // 4. Generate response with LLM
    prompt := fmt.Sprintf("Context:\n%s\n\nQuestion: %s\n\nAnswer:", context, question)
    response, err := r.llm.Generate(ctx, prompt)
    if err != nil {
        return "", fmt.Errorf("llm generation: %w", err)
    }
    
    return response, nil
}

func (r *RagEngine) textToVector(text string) []float32 {
    // Simplified: In real implementation, use embedding model
    vector := make([]float32, 384) // Common embedding dimension
    hash := 0
    for _, char := range text {
        hash += int(char)
    }
    
    for i := range vector {
        vector[i] = float32(hash % 1000) / 1000.0
    }
    
    return vector
}
```

### Go Concepts You'll Learn:
- **HTTP clients**: `http.Client`, `http.NewRequestWithContext`
- **Context usage**: Timeouts and cancellation
- **Error wrapping**: `fmt.Errorf` with `%w`
- **JSON handling**: Complex nested structures
- **Interface design**: Clean API patterns

## Phase 6: CLI & Polish (Week 11-12)
*Create professional command-line interface*

### New Concepts:
- **CLI frameworks**: `cobra` package
- **Configuration**: `viper` for config management
- **Logging**: `log/slog` structured logging
- **Testing**: `testing` package, table-driven tests
- **Build**: `go build`, cross-compilation

### Final Project: Complete RAG CLI
```go
// What you'll build in Phase 6
package main

import (
    "fmt"
    "os"
    
    "github.com/spf13/cobra"
    "github.com/spf13/viper"
)

var rootCmd = &cobra.Command{
    Use:   "rag-cli",
    Short: "A powerful RAG agent built in Go",
    Long:  `A RAG agent that helps with coding and manages your Obsidian knowledge base.`,
}

var chatCmd = &cobra.Command{
    Use:   "chat [message]",
    Short: "Chat with the RAG agent",
    Args:  cobra.MinimumNArgs(1),
    RunE: func(cmd *cobra.Command, args []string) error {
        agent := NewRagAgent()
        
        message := args[0]
        response, err := agent.Chat(cmd.Context(), message)
        if err != nil {
            return fmt.Errorf("chat failed: %w", err)
        }
        
        fmt.Printf("Agent: %s\n", response)
        return nil
    },
}

var obsidianCmd = &cobra.Command{
    Use:   "obsidian",
    Short: "Obsidian vault management",
}

var linkCmd = &cobra.Command{
    Use:   "link-suggestions [vault-path]",
    Short: "Generate link suggestions for notes",
    Args:  cobra.ExactArgs(1),
    RunE: func(cmd *cobra.Command, args []string) error {
        vault := NewObsidianVault(args[0])
        suggestions, err := vault.GenerateLinkSuggestions(cmd.Context())
        if err != nil {
            return fmt.Errorf("generate suggestions: %w", err)
        }
        
        for note, links := range suggestions {
            fmt.Printf("%s:\n", note)
            for _, link := range links {
                fmt.Printf("  -> %s\n", link)
            }
        }
        
        return nil
    },
}

func init() {
    // Add subcommands
    rootCmd.AddCommand(chatCmd)
    rootCmd.AddCommand(obsidianCmd)
    obsidianCmd.AddCommand(linkCmd)
    
    // Configuration
    viper.SetConfigName("config")
    viper.AddConfigPath(".")
    viper.AddConfigPath("$HOME/.rag-cli")
    
    // Flags
    rootCmd.PersistentFlags().String("model", "phi-4-mini", "Model to use")
    rootCmd.PersistentFlags().Bool("verbose", false, "Verbose output")
    
    viper.BindPFlag("model", rootCmd.PersistentFlags().Lookup("model"))
    viper.BindPFlag("verbose", rootCmd.PersistentFlags().Lookup("verbose"))
}

func main() {
    if err := rootCmd.Execute(); err != nil {
        fmt.Fprintf(os.Stderr, "Error: %v\n", err)
        os.Exit(1)
    }
}
```

### Go Concepts You'll Learn:
- **Command-line apps**: `cobra` framework
- **Configuration**: `viper` for settings
- **Project structure**: Organizing larger Go projects
- **Error handling**: Production-ready error patterns
- **Documentation**: Writing good Go documentation

## Learning Resources & Next Steps

### Essential Go Resources:
1. **Official Go Tour**: https://tour.golang.org/
2. **Effective Go**: https://golang.org/doc/effective_go.html
3. **Go by Example**: https://gobyexample.com/
4. **Awesome Go**: https://awesome-go.com/

### Practice Projects Between Phases:
- **Week 2**: Build a simple HTTP server
- **Week 4**: Create a basic REST API
- **Week 6**: Implement a concurrent job processor
- **Week 8**: Build a file watcher utility
- **Week 10**: Create a simple search engine
- **Week 12**: Package and distribute your RAG agent

### Key Go Principles You'll Master:
- **Simplicity**: Go's philosophy of simple, readable code
- **Concurrency**: Goroutines and channels for concurrent processing
- **Composition**: Interface-based design over inheritance
- **Error handling**: Explicit error handling patterns
- **Testing**: Built-in testing framework and practices

By the end of this journey, you'll have:
- ✅ A fully functional RAG agent
- ✅ Solid Go programming skills
- ✅ Real-world project experience
- ✅ Understanding of AI/ML integration
- ✅ Command-line tool development skills
- ✅ Concurrent programming knowledge

This approach gives you both practical Go skills and a useful tool for your daily work!