feat(config): add support for per-repository configuration overrides

Author: m7medVision

README.md

@@ -116,7 +116,19 @@ Requirements:
 ### 2. Prompt Configuration (`~/.config/.lazycommit.prompts.yaml`)
 Contains prompt templates and message configurations. **Safe to share in dotfiles and Git.**
 
-This file is automatically created on first run with sensible defaults:
+### Per-Repository Configuration
+
+You can override the prompt configuration on a per-repository basis by creating a `.lazycommit.prompts.yaml` file in the root of your git repository. This is useful for projects that require different languages or commit message formats.
+
+Example `.lazycommit.prompts.yaml` for a Korean project:
+```yaml
+language: ko
+commit_message_template: "Based on the following git diff, generate 5 conventional commit messages in Korean:\n\n%s"
+```
+
+**Note:** It is recommended to use only `.lazycommit.prompts.yaml` for repository-specific overrides. Avoid using a local `.lazycommit.yaml` (provider config) to prevent accidentally committing sensitive information like API keys.
+
+This file is automatically created on first run in the global config directory with sensible defaults:
 
 ```yaml
 system_message: "You are a helpful assistant that generates git commit messages, and pull request titles."

internal/config/config.go

@@ -32,6 +32,7 @@ func InitConfig() {
 	viper.SetConfigName(".lazycommit")
 	viper.SetConfigType("yaml")
 	viper.AddConfigPath(getConfigDir())
+
 	viper.SetConfigFile(filepath.Join(getConfigDir(), ".lazycommit.yaml"))
 
 	if token, err := LoadGitHubToken(); err == nil && token != "" {
@@ -43,11 +44,8 @@ func InitConfig() {
 		viper.SetDefault("providers.openai.model", "openai/gpt-5-mini")
 	}
 
-	// Set defaults for anthropic provider
 	viper.SetDefault("providers.anthropic.model", "claude-haiku-4-5")
 	viper.SetDefault("providers.anthropic.num_suggestions", 10)
-
-	// Set default language
 	viper.SetDefault("language", "en")
 
 	viper.AutomaticEnv()
@@ -73,7 +71,6 @@ func InitConfig() {
 		os.Exit(1)
 	}
 
-	// Initialize prompt configuration
 	InitPromptConfig()
 }
 

internal/config/prompts.go

@@ -5,13 +5,15 @@ import (
 	"os"
 	"path/filepath"
 
+	"github.com/m7medvision/lazycommit/internal/git"
 	"gopkg.in/yaml.v3"
 )
 
 type PromptConfig struct {
 	SystemMessage         string `yaml:"system_message"`
 	CommitMessageTemplate string `yaml:"commit_message_template"`
 	PRTitleTemplate       string `yaml:"pr_title_template"`
+	Language              string `yaml:"language,omitempty"`
 }
 
 var promptsCfg *PromptConfig
@@ -24,7 +26,13 @@ func InitPromptConfig() {
 
 	promptsFile := filepath.Join(getConfigDir(), ".lazycommit.prompts.yaml")
 
-	// Check if prompts file exists
+	if repoRoot, err := git.GetRepoRoot(); err == nil {
+		localPromptsFile := filepath.Join(repoRoot, ".lazycommit.prompts.yaml")
+		if _, err := os.Stat(localPromptsFile); err == nil {
+			promptsFile = localPromptsFile
+		}
+	}
+
 	if _, err := os.Stat(promptsFile); os.IsNotExist(err) {
 		// Create default prompts file
 		defaultConfig := getDefaultPromptConfig()
@@ -111,7 +119,11 @@ func GetCommitMessagePromptFromConfig(diff string) string {
 	}
 
 	// Add language instruction based on configuration
-	language := GetLanguage()
+	language := config.Language
+	if language == "" {
+		language = GetLanguage()
+	}
+
 	if language == "es" {
 		basePrompt += "\n\nIMPORTANT: Generate all commit messages in Spanish."
 	} else if language == "en" {

internal/git/git.go

@@ -3,11 +3,19 @@ package git
 import (
 	"bytes"
 	"fmt"
-
 	"os/exec"
+	"strings"
 )
 
-// GetStagedDiff returns the diff of the staged files.
+func GetRepoRoot() (string, error) {
+	cmd := exec.Command("git", "rev-parse", "--show-toplevel")
+	out, err := cmd.Output()
+	if err != nil {
+		return "", fmt.Errorf("error running git rev-parse --show-toplevel: %w", err)
+	}
+	return strings.TrimSpace(string(out)), nil
+}
+
 func GetStagedDiff() (string, error) {
 	cmd := exec.Command("git", "diff", "--cached")
 	var out bytes.Buffer