task: task-1753636924-a1d4c708 - created

Change-Id: Ic78528c47ae38114b9b7504f1c4a76f95e93eb13
diff --git a/server/config/config.go b/server/config/config.go
new file mode 100644
index 0000000..84441d2
--- /dev/null
+++ b/server/config/config.go
@@ -0,0 +1,234 @@
+package config
+
+import (
+	"fmt"
+	"os"
+	"time"
+
+	"gopkg.in/yaml.v3"
+)
+
+// Config represents the Staff MVP configuration
+type Config struct {
+	OpenAI OpenAIConfig `yaml:"openai"`
+	GitHub GitHubConfig `yaml:"github"`
+	Agents []AgentConfig `yaml:"agents"`
+	Tasks  TasksConfig   `yaml:"tasks"`
+	Git    GitConfig     `yaml:"git"`
+}
+
+// OpenAIConfig represents OpenAI provider configuration
+type OpenAIConfig struct {
+	APIKey     string        `yaml:"api_key"`
+	Model      string        `yaml:"model"`
+	BaseURL    string        `yaml:"base_url"`
+	Timeout    time.Duration `yaml:"timeout"`
+	MaxRetries int           `yaml:"max_retries"`
+}
+
+// GitHubConfig represents GitHub integration configuration
+type GitHubConfig struct {
+	Token string `yaml:"token"`
+	Owner string `yaml:"owner"`
+	Repo  string `yaml:"repo"`
+}
+
+// AgentConfig represents individual agent configuration
+type AgentConfig struct {
+	Name             string   `yaml:"name"`
+	Role             string   `yaml:"role"`
+	Model            string   `yaml:"model"`
+	SystemPromptFile string   `yaml:"system_prompt_file"`
+	Capabilities     []string `yaml:"capabilities"`     // For auto-assignment
+	TaskTypes        []string `yaml:"task_types"`       // Types of tasks this agent handles
+	MaxTokens        *int     `yaml:"max_tokens"`       // Model-specific token limits
+	Temperature      *float64 `yaml:"temperature"`      // Model creativity setting
+}
+
+// TasksConfig represents task management configuration
+type TasksConfig struct {
+	StoragePath   string `yaml:"storage_path"`
+	CompletedPath string `yaml:"completed_path"`
+}
+
+// GitConfig represents Git operation configuration
+type GitConfig struct {
+	BranchPrefix          string `yaml:"branch_prefix"`
+	CommitMessageTemplate string `yaml:"commit_message_template"`
+	PRTemplate            string `yaml:"pr_template"`
+}
+
+// LoadConfig loads configuration from a YAML file
+func LoadConfig(configPath string) (*Config, error) {
+	// Read the config file
+	data, err := os.ReadFile(configPath)
+	if err != nil {
+		return nil, fmt.Errorf("failed to read config file: %w", err)
+	}
+
+	// Parse YAML
+	var config Config
+	if err := yaml.Unmarshal(data, &config); err != nil {
+		return nil, fmt.Errorf("failed to parse config YAML: %w", err)
+	}
+
+	// Apply defaults
+	config = applyDefaults(config)
+
+	// Validate configuration
+	if err := validateConfig(config); err != nil {
+		return nil, fmt.Errorf("invalid configuration: %w", err)
+	}
+
+	return &config, nil
+}
+
+// LoadConfigWithEnvOverrides loads config with environment variable overrides
+func LoadConfigWithEnvOverrides(configPath string) (*Config, error) {
+	config, err := LoadConfig(configPath)
+	if err != nil {
+		return nil, err
+	}
+
+	// Override with environment variables if present
+	if apiKey := os.Getenv("OPENAI_API_KEY"); apiKey != "" {
+		config.OpenAI.APIKey = apiKey
+	}
+	if githubToken := os.Getenv("GITHUB_TOKEN"); githubToken != "" {
+		config.GitHub.Token = githubToken
+	}
+	if owner := os.Getenv("GITHUB_OWNER"); owner != "" {
+		config.GitHub.Owner = owner
+	}
+	if repo := os.Getenv("GITHUB_REPO"); repo != "" {
+		config.GitHub.Repo = repo
+	}
+
+	// Re-validate after env overrides
+	if err := validateConfig(*config); err != nil {
+		return nil, fmt.Errorf("invalid configuration after env overrides: %w", err)
+	}
+
+	return config, nil
+}
+
+// applyDefaults applies default values to configuration
+func applyDefaults(config Config) Config {
+	// OpenAI defaults
+	if config.OpenAI.Model == "" {
+		config.OpenAI.Model = "gpt-4"
+	}
+	if config.OpenAI.BaseURL == "" {
+		config.OpenAI.BaseURL = "https://api.openai.com/v1"
+	}
+	if config.OpenAI.Timeout == 0 {
+		config.OpenAI.Timeout = 30 * time.Second
+	}
+	if config.OpenAI.MaxRetries == 0 {
+		config.OpenAI.MaxRetries = 3
+	}
+
+	// Tasks defaults
+	if config.Tasks.StoragePath == "" {
+		config.Tasks.StoragePath = "tasks/"
+	}
+	if config.Tasks.CompletedPath == "" {
+		config.Tasks.CompletedPath = "tasks/completed/"
+	}
+
+	// Git defaults
+	if config.Git.BranchPrefix == "" {
+		config.Git.BranchPrefix = "task/"
+	}
+	if config.Git.CommitMessageTemplate == "" {
+		config.Git.CommitMessageTemplate = "Task {task_id}: {task_title}\n\n{solution}\n\nGenerated by Staff AI Agent: {agent_name}"
+	}
+	if config.Git.PRTemplate == "" {
+		config.Git.PRTemplate = `## Task: {task_title}
+
+**Task ID:** {task_id}  
+**Agent:** {agent_name}  
+**Priority:** {priority}
+
+### Description
+{task_description}
+
+### Solution
+{solution}
+
+### Files Changed
+{files_changed}
+
+---
+*Generated by Staff AI Multi-Agent System*`
+	}
+
+	// Agent defaults
+	for i := range config.Agents {
+		if config.Agents[i].Model == "" {
+			config.Agents[i].Model = config.OpenAI.Model
+		}
+	}
+
+	return config
+}
+
+// validateConfig validates the configuration
+func validateConfig(config Config) error {
+	// Validate OpenAI config
+	if config.OpenAI.APIKey == "" {
+		return fmt.Errorf("openai.api_key is required")
+	}
+	if config.OpenAI.Model == "" {
+		return fmt.Errorf("openai.model is required")
+	}
+
+	// Validate GitHub config
+	if config.GitHub.Token == "" {
+		return fmt.Errorf("github.token is required")
+	}
+	if config.GitHub.Owner == "" {
+		return fmt.Errorf("github.owner is required")
+	}
+	if config.GitHub.Repo == "" {
+		return fmt.Errorf("github.repo is required")
+	}
+
+	// Validate agents
+	if len(config.Agents) == 0 {
+		return fmt.Errorf("at least one agent must be configured")
+	}
+
+	for i, agent := range config.Agents {
+		if agent.Name == "" {
+			return fmt.Errorf("agent[%d].name is required", i)
+		}
+		if agent.Role == "" {
+			return fmt.Errorf("agent[%d].role is required", i)
+		}
+		if agent.SystemPromptFile == "" {
+			return fmt.Errorf("agent[%d].system_prompt_file is required", i)
+		}
+	}
+
+	return nil
+}
+
+// GetAgentByName returns an agent config by name
+func (c *Config) GetAgentByName(name string) (*AgentConfig, error) {
+	for _, agent := range c.Agents {
+		if agent.Name == name {
+			return &agent, nil
+		}
+	}
+	return nil, fmt.Errorf("agent not found: %s", name)
+}
+
+// ListAgentNames returns a list of all configured agent names
+func (c *Config) ListAgentNames() []string {
+	names := make([]string, len(c.Agents))
+	for i, agent := range c.Agents {
+		names[i] = agent.Name
+	}
+	return names
+}
\ No newline at end of file