refactor: restructure project layout — main.go to root, llm+config to pkg/

- Move cmd/agentu/main.go → main.go (project root)
- Move internal/llm/ → pkg/llm/ (leaf package, no internal deps)
- Move internal/config/ → pkg/config/ (leaf package, no internal deps)
- Update all import paths: agentu/internal/llm → agentu/pkg/llm (14 files)
- Update all import paths: agentu/internal/config → agentu/pkg/config (3 files)
- Update README: build/run commands, CLI flags section
- agent/session/tools/tui stay in internal/ (app-specific business logic)

Build: go build . | Test: go test ./... | Vet: go vet ./...

README.md

@@ -20,13 +20,13 @@ model/provider switching, and local tools.
 mkdir -p ~/.agentu
 cp agentu.example.yaml ~/.agentu/config.yaml
 export AGENTU_API_KEY='your-api-key'
-go run ./cmd/agentu
+go run .
 ```
 
 Use `--yolo` only when you want agentu to write files or run shell commands:
 
 ```sh
-go run ./cmd/agentu --yolo
+go run . --yolo
 ```
 
 ## Config
@@ -82,7 +82,7 @@ top-level OpenAI-compatible request field named `thinking`.
 ## CLI Flags
 
 ```sh
-go run ./cmd/agentu [flags]
+go run . [flags]
 ```
 
 - `--config <path>` loads a YAML config file. Default: `~/.agentu/config.yaml`.
@@ -150,7 +150,7 @@ Run the verification suite:
 ```sh
 go test ./...
 go vet ./...
-go build ./cmd/agentu
+go build .
 ```
 
 Local config and build outputs are intentionally ignored by git.

internal/agent/agent.go

@@ -9,7 +9,7 @@ import (
 	"strings"
 	"time"
 
-	"agentu/internal/llm"
+	"agentu/pkg/llm"
 	"agentu/internal/tools"
 )
 

internal/agent/agent_test.go

@@ -7,7 +7,7 @@ import (
 	"strings"
 	"testing"
 
-	"agentu/internal/llm"
+	"agentu/pkg/llm"
 	"agentu/internal/tools"
 )
 

internal/session/manager.go

@@ -8,8 +8,8 @@ import (
 	"time"
 
 	"agentu/internal/agent"
-	"agentu/internal/config"
-	"agentu/internal/llm"
+	"agentu/pkg/config"
+	"agentu/pkg/llm"
 )
 
 type Manager struct {

internal/session/manager_test.go

@@ -7,8 +7,8 @@ import (
 	"testing"
 
 	"agentu/internal/agent"
-	"agentu/internal/config"
-	"agentu/internal/llm"
+	"agentu/pkg/config"
+	"agentu/pkg/llm"
 )
 
 type recordingProvider struct {

internal/session/store.go

@@ -11,7 +11,7 @@ import (
 	"strings"
 	"time"
 
-	"agentu/internal/llm"
+	"agentu/pkg/llm"
 )
 
 // Session represents a persisted conversation.

internal/session/store_test.go

@@ -5,7 +5,7 @@ import (
 	"path/filepath"
 	"testing"
 
-	"agentu/internal/llm"
+	"agentu/pkg/llm"
 )
 
 func tempStore(t *testing.T) *Store {

internal/tools/code.go

@@ -16,7 +16,7 @@ import (
 	"sort"
 	"strings"
 
-	"agentu/internal/llm"
+	"agentu/pkg/llm"
 )
 
 const defaultCodeSymbolFileLimit = 50

internal/tools/file.go

@@ -13,7 +13,7 @@ import (
 	"sort"
 	"strings"
 
-	"agentu/internal/llm"
+	"agentu/pkg/llm"
 )
 
 type FileReadTool struct {

internal/tools/shell.go

@@ -9,7 +9,7 @@ import (
 	"os/exec"
 	"strings"
 
-	"agentu/internal/llm"
+	"agentu/pkg/llm"
 )
 
 type ShellRunTool struct {

internal/tools/tools.go

@@ -7,7 +7,7 @@ import (
 	"sort"
 	"strings"
 
-	"agentu/internal/llm"
+	"agentu/pkg/llm"
 )
 
 const MaxToolOutputBytes = 64 * 1024

internal/tools/web_builtin.go

@@ -10,7 +10,7 @@ import (
 	"net/url"
 	"strings"
 
-	"agentu/internal/llm"
+	"agentu/pkg/llm"
 
 	"golang.org/x/net/html"
 )

internal/tui/app.go

@@ -9,7 +9,7 @@ import (
 	"strings"
 
 	"agentu/internal/agent"
-	"agentu/internal/llm"
+	"agentu/pkg/llm"
 
 	"github.com/charmbracelet/bubbles/spinner"
 	"github.com/charmbracelet/bubbles/textarea"

internal/tui/app_test.go

@@ -9,7 +9,7 @@ import (
 	"testing"
 
 	"agentu/internal/agent"
-	"agentu/internal/llm"
+	"agentu/pkg/llm"
 
 	tea "github.com/charmbracelet/bubbletea"
 	"github.com/charmbracelet/lipgloss"

main.go

@@ -13,8 +13,8 @@ import (
 	"strings"
 
 	"agentu/internal/agent"
-	"agentu/internal/config"
-	"agentu/internal/llm"
+	"agentu/pkg/config"
+	"agentu/pkg/llm"
 	"agentu/internal/session"
 	"agentu/internal/tools"
 	"agentu/internal/tui"