chore: snapshot main sync
This commit is contained in:
369
docs/how-to-build-a-coding-agent/list_files.go
Normal file
369
docs/how-to-build-a-coding-agent/list_files.go
Normal file
@@ -0,0 +1,369 @@
|
||||
package main
|
||||
|
||||
import (
|
||||
"bufio"
|
||||
"context"
|
||||
"encoding/json"
|
||||
"flag"
|
||||
"fmt"
|
||||
"log"
|
||||
"os"
|
||||
"path/filepath"
|
||||
"strings"
|
||||
|
||||
"github.com/anthropics/anthropic-sdk-go"
|
||||
"github.com/invopop/jsonschema"
|
||||
)
|
||||
|
||||
func main() {
|
||||
verbose := flag.Bool("verbose", false, "enable verbose logging")
|
||||
flag.Parse()
|
||||
|
||||
if *verbose {
|
||||
log.SetOutput(os.Stderr)
|
||||
log.SetFlags(log.LstdFlags | log.Lshortfile)
|
||||
log.Println("Verbose logging enabled")
|
||||
} else {
|
||||
log.SetOutput(os.Stdout)
|
||||
log.SetFlags(0)
|
||||
log.SetPrefix("")
|
||||
}
|
||||
|
||||
client := anthropic.NewClient()
|
||||
if *verbose {
|
||||
log.Println("Anthropic client initialized")
|
||||
}
|
||||
|
||||
scanner := bufio.NewScanner(os.Stdin)
|
||||
getUserMessage := func() (string, bool) {
|
||||
if !scanner.Scan() {
|
||||
return "", false
|
||||
}
|
||||
return scanner.Text(), true
|
||||
}
|
||||
|
||||
tools := []ToolDefinition{ReadFileDefinition, ListFilesDefinition}
|
||||
if *verbose {
|
||||
log.Printf("Initialized %d tools", len(tools))
|
||||
}
|
||||
agent := NewAgent(&client, getUserMessage, tools, *verbose)
|
||||
err := agent.Run(context.TODO())
|
||||
if err != nil {
|
||||
fmt.Printf("Error: %s\n", err.Error())
|
||||
}
|
||||
}
|
||||
|
||||
func NewAgent(
|
||||
client *anthropic.Client,
|
||||
getUserMessage func() (string, bool),
|
||||
tools []ToolDefinition,
|
||||
verbose bool,
|
||||
) *Agent {
|
||||
return &Agent{
|
||||
client: client,
|
||||
getUserMessage: getUserMessage,
|
||||
tools: tools,
|
||||
verbose: verbose,
|
||||
}
|
||||
}
|
||||
|
||||
type Agent struct {
|
||||
client *anthropic.Client
|
||||
getUserMessage func() (string, bool)
|
||||
tools []ToolDefinition
|
||||
verbose bool
|
||||
}
|
||||
|
||||
func (a *Agent) Run(ctx context.Context) error {
|
||||
conversation := []anthropic.MessageParam{}
|
||||
|
||||
if a.verbose {
|
||||
log.Println("Starting chat session with tools enabled")
|
||||
}
|
||||
fmt.Println("Chat with Claude (use 'ctrl-c' to quit)")
|
||||
|
||||
for {
|
||||
fmt.Print("\u001b[94mYou\u001b[0m: ")
|
||||
userInput, ok := a.getUserMessage()
|
||||
if !ok {
|
||||
if a.verbose {
|
||||
log.Println("User input ended, breaking from chat loop")
|
||||
}
|
||||
break
|
||||
}
|
||||
|
||||
// Skip empty messages
|
||||
if userInput == "" {
|
||||
if a.verbose {
|
||||
log.Println("Skipping empty message")
|
||||
}
|
||||
continue
|
||||
}
|
||||
|
||||
if a.verbose {
|
||||
log.Printf("User input received: %q", userInput)
|
||||
}
|
||||
|
||||
userMessage := anthropic.NewUserMessage(anthropic.NewTextBlock(userInput))
|
||||
conversation = append(conversation, userMessage)
|
||||
|
||||
if a.verbose {
|
||||
log.Printf("Sending message to Claude, conversation length: %d", len(conversation))
|
||||
}
|
||||
|
||||
message, err := a.runInference(ctx, conversation)
|
||||
if err != nil {
|
||||
if a.verbose {
|
||||
log.Printf("Error during inference: %v", err)
|
||||
}
|
||||
return err
|
||||
}
|
||||
conversation = append(conversation, message.ToParam())
|
||||
|
||||
// Keep processing until Claude stops using tools
|
||||
for {
|
||||
// Collect all tool uses and their results
|
||||
var toolResults []anthropic.ContentBlockParamUnion
|
||||
var hasToolUse bool
|
||||
|
||||
if a.verbose {
|
||||
log.Printf("Processing %d content blocks from Claude", len(message.Content))
|
||||
}
|
||||
|
||||
for _, content := range message.Content {
|
||||
switch content.Type {
|
||||
case "text":
|
||||
fmt.Printf("\u001b[93mClaude\u001b[0m: %s\n", content.Text)
|
||||
case "tool_use":
|
||||
hasToolUse = true
|
||||
toolUse := content.AsToolUse()
|
||||
if a.verbose {
|
||||
log.Printf("Tool use detected: %s with input: %s", toolUse.Name, string(toolUse.Input))
|
||||
}
|
||||
fmt.Printf("\u001b[96mtool\u001b[0m: %s(%s)\n", toolUse.Name, string(toolUse.Input))
|
||||
|
||||
// Find and execute the tool
|
||||
var toolResult string
|
||||
var toolError error
|
||||
var toolFound bool
|
||||
for _, tool := range a.tools {
|
||||
if tool.Name == toolUse.Name {
|
||||
if a.verbose {
|
||||
log.Printf("Executing tool: %s", tool.Name)
|
||||
}
|
||||
toolResult, toolError = tool.Function(toolUse.Input)
|
||||
fmt.Printf("\u001b[92mresult\u001b[0m: %s\n", toolResult)
|
||||
if toolError != nil {
|
||||
fmt.Printf("\u001b[91merror\u001b[0m: %s\n", toolError.Error())
|
||||
}
|
||||
if a.verbose {
|
||||
if toolError != nil {
|
||||
log.Printf("Tool execution failed: %v", toolError)
|
||||
} else {
|
||||
log.Printf("Tool execution successful, result length: %d chars", len(toolResult))
|
||||
}
|
||||
}
|
||||
toolFound = true
|
||||
break
|
||||
}
|
||||
}
|
||||
|
||||
if !toolFound {
|
||||
toolError = fmt.Errorf("tool '%s' not found", toolUse.Name)
|
||||
fmt.Printf("\u001b[91merror\u001b[0m: %s\n", toolError.Error())
|
||||
}
|
||||
|
||||
// Add tool result to collection
|
||||
if toolError != nil {
|
||||
toolResults = append(toolResults, anthropic.NewToolResultBlock(toolUse.ID, toolError.Error(), true))
|
||||
} else {
|
||||
toolResults = append(toolResults, anthropic.NewToolResultBlock(toolUse.ID, toolResult, false))
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
// If there were no tool uses, we're done
|
||||
if !hasToolUse {
|
||||
break
|
||||
}
|
||||
|
||||
// Send all tool results back and get Claude's response
|
||||
if a.verbose {
|
||||
log.Printf("Sending %d tool results back to Claude", len(toolResults))
|
||||
}
|
||||
toolResultMessage := anthropic.NewUserMessage(toolResults...)
|
||||
conversation = append(conversation, toolResultMessage)
|
||||
|
||||
// Get Claude's response after tool execution
|
||||
message, err = a.runInference(ctx, conversation)
|
||||
if err != nil {
|
||||
if a.verbose {
|
||||
log.Printf("Error during followup inference: %v", err)
|
||||
}
|
||||
return err
|
||||
}
|
||||
conversation = append(conversation, message.ToParam())
|
||||
|
||||
if a.verbose {
|
||||
log.Printf("Received followup response with %d content blocks", len(message.Content))
|
||||
}
|
||||
|
||||
// Continue loop to process the new message
|
||||
}
|
||||
}
|
||||
|
||||
if a.verbose {
|
||||
log.Println("Chat session ended")
|
||||
}
|
||||
return nil
|
||||
}
|
||||
|
||||
func (a *Agent) runInference(ctx context.Context, conversation []anthropic.MessageParam) (*anthropic.Message, error) {
|
||||
anthropicTools := []anthropic.ToolUnionParam{}
|
||||
for _, tool := range a.tools {
|
||||
anthropicTools = append(anthropicTools, anthropic.ToolUnionParam{
|
||||
OfTool: &anthropic.ToolParam{
|
||||
Name: tool.Name,
|
||||
Description: anthropic.String(tool.Description),
|
||||
InputSchema: tool.InputSchema,
|
||||
},
|
||||
})
|
||||
}
|
||||
|
||||
if a.verbose {
|
||||
log.Printf("Making API call to Claude with model: %s and %d tools", anthropic.ModelClaude3_7SonnetLatest, len(anthropicTools))
|
||||
}
|
||||
|
||||
message, err := a.client.Messages.New(ctx, anthropic.MessageNewParams{
|
||||
Model: anthropic.ModelClaude3_7SonnetLatest,
|
||||
MaxTokens: int64(1024),
|
||||
Messages: conversation,
|
||||
Tools: anthropicTools,
|
||||
})
|
||||
|
||||
if a.verbose {
|
||||
if err != nil {
|
||||
log.Printf("API call failed: %v", err)
|
||||
} else {
|
||||
log.Printf("API call successful, response received")
|
||||
}
|
||||
}
|
||||
|
||||
return message, err
|
||||
}
|
||||
|
||||
type ToolDefinition struct {
|
||||
Name string `json:"name"`
|
||||
Description string `json:"description"`
|
||||
InputSchema anthropic.ToolInputSchemaParam `json:"input_schema"`
|
||||
Function func(input json.RawMessage) (string, error)
|
||||
}
|
||||
|
||||
var ReadFileDefinition = ToolDefinition{
|
||||
Name: "read_file",
|
||||
Description: "Read the contents of a given relative file path. Use this when you want to see what's inside a file. Do not use this with directory names.",
|
||||
InputSchema: ReadFileInputSchema,
|
||||
Function: ReadFile,
|
||||
}
|
||||
|
||||
var ListFilesDefinition = ToolDefinition{
|
||||
Name: "list_files",
|
||||
Description: "List files and directories at a given path. If no path is provided, lists files in the current directory.",
|
||||
InputSchema: ListFilesInputSchema,
|
||||
Function: ListFiles,
|
||||
}
|
||||
|
||||
type ReadFileInput struct {
|
||||
Path string `json:"path" jsonschema_description:"The relative path of a file in the working directory."`
|
||||
}
|
||||
|
||||
var ReadFileInputSchema = GenerateSchema[ReadFileInput]()
|
||||
|
||||
type ListFilesInput struct {
|
||||
Path string `json:"path,omitempty" jsonschema_description:"Optional relative path to list files from. Defaults to current directory if not provided."`
|
||||
}
|
||||
|
||||
var ListFilesInputSchema = GenerateSchema[ListFilesInput]()
|
||||
|
||||
func ReadFile(input json.RawMessage) (string, error) {
|
||||
readFileInput := ReadFileInput{}
|
||||
err := json.Unmarshal(input, &readFileInput)
|
||||
if err != nil {
|
||||
panic(err)
|
||||
}
|
||||
|
||||
content, err := os.ReadFile(readFileInput.Path)
|
||||
if err != nil {
|
||||
return "", err
|
||||
}
|
||||
return string(content), nil
|
||||
}
|
||||
|
||||
func ListFiles(input json.RawMessage) (string, error) {
|
||||
listFilesInput := ListFilesInput{}
|
||||
err := json.Unmarshal(input, &listFilesInput)
|
||||
if err != nil {
|
||||
panic(err)
|
||||
}
|
||||
|
||||
dir := "."
|
||||
if listFilesInput.Path != "" {
|
||||
dir = listFilesInput.Path
|
||||
}
|
||||
|
||||
log.Printf("Listing files in directory: %s", dir)
|
||||
|
||||
var files []string
|
||||
err = filepath.Walk(dir, func(path string, info os.FileInfo, err error) error {
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
|
||||
relPath, err := filepath.Rel(dir, path)
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
|
||||
// Skip .devenv directory and its contents
|
||||
if info.IsDir() && (relPath == ".devenv" || strings.HasPrefix(relPath, ".devenv/")) {
|
||||
return filepath.SkipDir
|
||||
}
|
||||
|
||||
if relPath != "." {
|
||||
if info.IsDir() {
|
||||
files = append(files, relPath+"/")
|
||||
} else {
|
||||
files = append(files, relPath)
|
||||
}
|
||||
}
|
||||
return nil
|
||||
})
|
||||
|
||||
if err != nil {
|
||||
log.Printf("Failed to list files in %s: %v", dir, err)
|
||||
return "", err
|
||||
}
|
||||
|
||||
log.Printf("Successfully listed %d items in %s", len(files), dir)
|
||||
|
||||
result, err := json.Marshal(files)
|
||||
if err != nil {
|
||||
return "", err
|
||||
}
|
||||
|
||||
return string(result), nil
|
||||
}
|
||||
|
||||
func GenerateSchema[T any]() anthropic.ToolInputSchemaParam {
|
||||
reflector := jsonschema.Reflector{
|
||||
AllowAdditionalProperties: false,
|
||||
DoNotReference: true,
|
||||
}
|
||||
var v T
|
||||
|
||||
schema := reflector.Reflect(v)
|
||||
|
||||
return anthropic.ToolInputSchemaParam{
|
||||
Properties: schema.Properties,
|
||||
}
|
||||
}
|
||||
Reference in New Issue
Block a user