Improve config lookup and OpenAI streaming decode

README.md

@@ -5,8 +5,10 @@ Goaichat is a terminal-based AI chat client written in Go. It connects to OpenAI
 ## Features
 
 - **Config-driven startup**: Loads defaults from `config.yaml` with environment overrides.
-- **Interactive chat loop**: (In progress) command-driven conversation with persistent history.
-- **Extensible architecture**: Structured packages under `internal/` for config, app wiring, chat, storage, OpenAI client, UI, and telemetry.
+- **Interactive chat loop**: Command-driven conversation with OpenAI-compatible models.
+- **Persistent history**: Sessions and messages are stored in SQLite, allowing `/open` and `/rename` commands.
+- **Session naming assistance**: The assistant suggests descriptive session names that you can adopt.
+- **Extensible architecture**: Structured packages under `internal/` for configuration, chat orchestration, storage, OpenAI client integration, and CLI wiring.
 
 ## Getting Started
 
@@ -31,7 +33,7 @@ go build ./cmd/goaichat
 
 ### Configuration
 
-Create `config.yaml` in the project root or pass `--config` to specify a path. A minimal configuration looks like:
+Create `config.yaml` in the project root or pass `--config` to specify a path. When no path is provided, Goaichat searches the current working directory first and then `$HOME/.config/goaichat/config.yaml`. A minimal configuration looks like:
 
 ```yaml
 api:
@@ -58,7 +60,24 @@ Environment variables override several fields:
 go run ./cmd/goaichat --config path/to/config.yaml
 ```
 
-The current build logs startup/shutdown messages while core services are implemented. Upcoming milestones include the chat loop, persistence, OpenAI integration, and Bubble Tea UI.
+### Usage
+
+After launching, type messages at the prompt. The following commands are available:
+
+- `/help` – display available commands.
+- `/reset` – clear the current in-memory conversation.
+- `/list` – list saved sessions with summaries.
+- `/open <name>` – load a previously saved session by name.
+- `/rename <name>` – assign a new name to the current session (use suggestions or provide your own).
+- `/exit` – quit the application.
+
+The assistant proposes session name suggestions after the first reply in a session. Use `/rename <suggested-name>` to accept them quickly.
+
+### Persistence
+
+Goaichat uses SQLite for storage. On first run, the application applies migrations from `internal/storage/migrations/`. Sessions are automatically created when you begin chatting, and every message is stored for later retrieval.
+
+By default the database is stored at `$HOME/.local/share/goaichat/goaichat.db`. You can override the location via the `storage.path` or `storage.base_dir` settings in `config.yaml`.
 
 ## Development
 
@@ -67,4 +86,4 @@ The current build logs startup/shutdown messages while core services are impleme
 
 ## License
 
-TBD
+This project is licensed under the [MIT License](LICENSE).

dev-plan.md

@@ -8,7 +8,7 @@
 ## Functional Requirements
 - **Interactive chat loop** Allow continuous message exchange with the AI until the user exits.
 - **Config-driven startup** Parse `config.yaml` for `api.url`, `api.key`, model defaults, and future options (e.g., system prompts, temperature, streaming flag).
-- **Persistent history** Store chats in a SQLite database located at `/var/log/goaichat/<username>/goaichat.db`, capturing session metadata and full message transcripts.
+- **Persistent history** Store chats in a SQLite database located at `$HOME/.local/share/goaichat/goaichat.db` (configurable), capturing session metadata and full message transcripts.
 - **History commands** Provide `/list` to enumerate saved chats and allow selecting or reopening them within the session.
 - **Model management** Support `/models` command to display configured/available models, persist the user’s choice, and use it for subsequent requests.
 - **Graceful exit controls** Support commands like `/exit`, `/reset`, `/help`.
@@ -44,20 +44,17 @@ dflow LR
     ChatCore --> UI
     Config[(config.yaml + env)] --> ConfigPkg[Configuration]
     ConfigPkg --> AppCore[Application core]
-    AppCore --> UI
     AppCore --> ChatCore
     AppCore --> OpenAIClient
     AppCore --> Storage
-```
-
-## Persistence & Data Storage (`internal/storage`)
-- **Data directory** Resolve user-specific path `/var/log/goaichat/<username>/` (configurable override) and ensure directories exist with secure permissions.
+##- **Persistence & Data Storage (`internal/storage`)
+  - **Data directory** Resolve user-specific path `$HOME/.local/share/goaichat/` (configurable override) and ensure directories exist with secure permissions.
   - **Database** SQLite file `goaichat.db` managed via `modernc.org/sqlite` (pure Go) for portability; allow build tag to switch to `mattn/go-sqlite3` if desired.
   - **Schema**
     - **`sessions`** (`id`, `name`, `created_at`, `updated_at`, `model_name`, `summary`).
     - **`messages`** (`id`, `session_id`, `role`, `content`, `token_count`, `created_at`).
     - **`models`** (`id`, `name`, `display_name`, `provider`, `is_default`, `last_used_at`).
-- **Migrations** Ship SQL migration files applied on startup; version using goose/atlas or simple in-app migration runner.
+{{ ... }}
 - **Data access** Provide repository interfaces for chat service to create sessions, append messages, list chats, update selected model, and fetch transcripts.
 - **Performance** Enable write-ahead logging, tune connection settings, and guard concurrent access with a request queue or mutex.
 
@@ -127,7 +124,7 @@ logging:
 - **Milestone 4: Persistence foundation**
   - **Design** SQLite schema and migrations within `internal/storage`.
   - **Implement** repositories for sessions, messages, and models.
-  - **Ensure** path resolution to `/var/log/goaichat/<username>/` with permission checks and tests.
+  - **Ensure** path resolution to `$HOME/.local/share/goaichat/` with permission checks and tests.
 
 - **Milestone 5: Chat loop MVP**
   - **Implement** CLI loop that reads user input, calls chat client, prints responses.

internal/config/config.go

@@ -4,6 +4,7 @@ import (
 	"errors"
 	"fmt"
 	"os"
+	"path/filepath"
 	"strings"
 
 	"gopkg.in/yaml.v3"
@@ -63,9 +64,20 @@ func Load(path string) (*Config, error) {
 			return nil, err
 		}
 	} else {
-		if err := loadFile("config.yaml", &cfg); err != nil && !errors.Is(err, os.ErrNotExist) {
+		candidates := []string{"config.yaml"}
+		if home, err := os.UserHomeDir(); err == nil && strings.TrimSpace(home) != "" {
+			candidates = append(candidates, filepath.Join(home, ".config", "goaichat", "config.yaml"))
+		}
+
+		for _, candidate := range candidates {
+			if err := loadFile(candidate, &cfg); err != nil {
+				if errors.Is(err, os.ErrNotExist) {
+					continue
+				}
 				return nil, err
 			}
+			break
+		}
 	}
 
 	applyEnvOverrides(&cfg)

internal/openai/client.go

@@ -1,6 +1,7 @@
 package openai
 
 import (
+	"bufio"
 	"bytes"
 	"context"
 	"encoding/json"
@@ -86,6 +87,9 @@ func (c *Client) CreateChatCompletion(ctx context.Context, req ChatCompletionReq
 	defer resp.Body.Close()
 
 	if resp.StatusCode >= 200 && resp.StatusCode < 300 {
+		if req.Stream {
+			return decodeStream(resp.Body)
+		}
 		return decodeSuccess(resp.Body)
 	}
 
@@ -93,13 +97,121 @@ func (c *Client) CreateChatCompletion(ctx context.Context, req ChatCompletionReq
 }
 
 func decodeSuccess(r io.Reader) (*ChatCompletionResponse, error) {
+	data, err := io.ReadAll(r)
+	if err != nil {
+		return nil, fmt.Errorf("read response: %w", err)
+	}
+
 	var response ChatCompletionResponse
-	if err := json.NewDecoder(r).Decode(&response); err != nil {
+	if err := json.Unmarshal(data, &response); err != nil {
+		trimmed := bytes.TrimSpace(data)
+		if len(trimmed) == 0 {
 			return nil, fmt.Errorf("decode response: %w", err)
 		}
+		return &ChatCompletionResponse{
+			Choices: []ChatCompletionChoice{{
+				Message: ChatMessage{Role: "assistant", Content: string(trimmed)},
+			}},
+		}, nil
+	}
+
 	return &response, nil
 }
 
+func decodeStream(r io.Reader) (*ChatCompletionResponse, error) {
+	scanner := bufio.NewScanner(r)
+	var payloads []json.RawMessage
+
+	for scanner.Scan() {
+		line := scanner.Text()
+		if strings.HasPrefix(line, "data: ") {
+			payload := strings.TrimPrefix(line, "data: ")
+			if payload == "[DONE]" {
+				break
+			}
+			payloads = append(payloads, json.RawMessage(payload))
+		}
+	}
+
+	if err := scanner.Err(); err != nil {
+		return nil, fmt.Errorf("read stream: %w", err)
+	}
+
+	if len(payloads) == 0 {
+		return nil, errors.New("empty stream response")
+	}
+
+	type streamChunk struct {
+		ID      string `json:"id"`
+		Object  string `json:"object"`
+		Choices []struct {
+			Index        int         `json:"index"`
+			Message      ChatMessage `json:"message"`
+			Delta        ChatMessage `json:"delta"`
+			FinishReason string      `json:"finish_reason"`
+		} `json:"choices"`
+		Usage Usage `json:"usage"`
+	}
+
+	var aggregated ChatCompletionResponse
+	var builder strings.Builder
+	role := "assistant"
+	finish := ""
+
+	for _, payload := range payloads {
+		var chunk streamChunk
+		if err := json.Unmarshal(payload, &chunk); err != nil {
+			return nil, fmt.Errorf("decode stream response: %w", err)
+		}
+		if aggregated.ID == "" {
+			aggregated.ID = chunk.ID
+		}
+		if aggregated.Object == "" {
+			aggregated.Object = chunk.Object
+		}
+		aggregated.Usage.PromptTokens += chunk.Usage.PromptTokens
+		aggregated.Usage.CompletionTokens += chunk.Usage.CompletionTokens
+		aggregated.Usage.TotalTokens += chunk.Usage.TotalTokens
+
+		if len(chunk.Choices) == 0 {
+			continue
+		}
+
+		choice := chunk.Choices[0]
+		if choice.Message.Role != "" {
+			role = choice.Message.Role
+		}
+		if choice.Delta.Role != "" {
+			role = choice.Delta.Role
+		}
+		if choice.Message.Content != "" {
+			builder.WriteString(choice.Message.Content)
+		}
+		if choice.Delta.Content != "" {
+			builder.WriteString(choice.Delta.Content)
+		}
+		if choice.FinishReason != "" {
+			finish = choice.FinishReason
+		}
+	}
+
+	content := strings.TrimSpace(builder.String())
+	if content == "" {
+		return nil, errors.New("stream response contained no content")
+	}
+
+	aggregated.Choices = []ChatCompletionChoice{{
+		Index:        0,
+		FinishReason: finish,
+		Message: ChatMessage{
+			Role:    role,
+			Content: content,
+		},
+	}}
+
+	return &aggregated, nil
+}
+
 func decodeError(r io.Reader, status int) error {
 	var apiErr ErrorResponse
 	if err := json.NewDecoder(r).Decode(&apiErr); err != nil {

internal/storage/storage.go

@@ -87,20 +87,26 @@ func resolvePath(cfg config.StorageConfig) (string, error) {
 		return cfg.Path, nil
 	}
 
-	username := cfg.Username
+	baseDir := strings.TrimSpace(cfg.BaseDir)
+	if baseDir == "" {
+		home, err := os.UserHomeDir()
+		if err == nil && strings.TrimSpace(home) != "" {
+			baseDir = filepath.Join(home, ".local", "share", "goaichat")
+		}
+	}
+
+	if baseDir == "" {
+		username := strings.TrimSpace(cfg.Username)
 		if username == "" {
-		username = os.Getenv("USER")
+			username = strings.TrimSpace(os.Getenv("USER"))
 			if username == "" {
 				username = "default"
 			}
 		}
-
-	base := filepath.Join("/var/log/goaichat", username)
-	if cfg.BaseDir != "" {
-		base = cfg.BaseDir
+		baseDir = filepath.Join(os.TempDir(), "goaichat", username)
 	}
 
-	return filepath.Join(base, "goaichat.db"), nil
+	return filepath.Join(baseDir, "goaichat.db"), nil
 }
 
 func ensureDir(dir string) error {