diff --git a/chat/main.go b/chat/main.go
new file mode 100644
index 0000000..265784a
--- /dev/null
+++ b/chat/main.go
@@ -0,0 +1,23 @@
+package chat
+
+import (
+	"github.com/nemoden/chat/config"
+	gogpt "github.com/sashabaranov/go-gpt3"
+)
+
+type Client struct {
+	client *gogpt.Client
+}
+
+func NewClient(c *config.Config) (*Client, error) {
+	apiKey, _, err := config.LoadApiKey()
+	if err != nil {
+		return nil, err
+	}
+	client := gogpt.NewClient(apiKey)
+	return &Client{client}, nil
+}
+
+func (c *Client) GptClient() *gogpt.Client {
+	return c.client
+}
diff --git a/cmd/init.go b/cmd/init.go
new file mode 100644
index 0000000..b33c0c7
--- /dev/null
+++ b/cmd/init.go
@@ -0,0 +1,46 @@
+/*
+Copyright © 2023 NAME HERE <EMAIL ADDRESS>
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+	http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+package cmd
+
+import (
+	"fmt"
+
+	"github.com/spf13/cobra"
+)
+
+// initCmd represents the init command
+var initCmd = &cobra.Command{
+	Use:   "init",
+	Short: "Initialises chat",
+	Long:  "",
+	Run: func(cmd *cobra.Command, args []string) {
+		fmt.Println("init called")
+	},
+}
+
+func init() {
+	rootCmd.AddCommand(initCmd)
+
+	// Here you will define your flags and configuration settings.
+
+	// Cobra supports Persistent Flags which will work for this command
+	// and all subcommands, e.g.:
+	// initCmd.PersistentFlags().String("foo", "", "A help for foo")
+
+	// Cobra supports local flags which will only run when this command
+	// is called directly, e.g.:
+	// initCmd.Flags().BoolP("toggle", "t", false, "Help message for toggle")
+}
diff --git a/cmd/main.go b/cmd/main.go
new file mode 100644
index 0000000..62bc654
--- /dev/null
+++ b/cmd/main.go
@@ -0,0 +1,17 @@
+package cmd
+
+import "github.com/spf13/cobra"
+
+func GetRootCmd() *cobra.Command {
+	return rootCmd
+}
+
+func GetSubcommandsMap() map[string]bool {
+	commands := rootCmd.Commands()
+	commandsLen := len(commands)
+	subcommands := make(map[string]bool, commandsLen)
+	for _, c := range commands {
+		subcommands[c.Use] = true
+	}
+	return subcommands
+}
diff --git a/cmd/root.go b/cmd/root.go
new file mode 100644
index 0000000..955a4fe
--- /dev/null
+++ b/cmd/root.go
@@ -0,0 +1,110 @@
+/*
+Copyright © 2023 NAME HERE <EMAIL ADDRESS>
+*/
+package cmd
+
+import (
+	"bufio"
+	"context"
+	"errors"
+	"fmt"
+	"strings"
+
+	"os"
+
+	"github.com/nemoden/chat/chat"
+	"github.com/nemoden/chat/config"
+	gogpt "github.com/sashabaranov/go-gpt3"
+
+	"github.com/spf13/cobra"
+)
+
+// rootCmd represents the base command when called without any subcommands
+var rootCmd = &cobra.Command{
+	Use:   "chat",
+	Short: "ChatGPT CLI and REPL",
+	Long:  `Use ChatGPT not leaving your terminal`,
+	FParseErrWhitelist: cobra.FParseErrWhitelist{
+		UnknownFlags: true,
+	},
+	Run: func(cmd *cobra.Command, args []string) {
+		reader := bufio.NewReader(os.Stdin)
+
+		options := getOptions(os.Args[1:])
+		c := config.LoadConfig(options)
+		client, err := chat.NewClient(c)
+
+		if errors.Is(err, config.ErrApiTokenFileDoesntExist) {
+			fmt.Printf(config.TokenFileDoesntExistPrompt)
+			os.Exit(0)
+		}
+		if errors.Is(err, config.ErrCantOpenApiTokenFileForReading) {
+			fmt.Printf(config.TokenFileNotReadablePrompt)
+			os.Exit(0)
+		}
+
+		ctx := context.Background()
+
+		for {
+			fmt.Printf("You: ")
+			input, _ := reader.ReadString('\n')
+			input = strings.TrimSpace(input)
+
+			if input == "exit" {
+				break
+			}
+
+			prompt := ""
+			if c.Format == "markdown" {
+				prompt += "Return response in markdown format. Prompt on a new line:\n"
+			}
+			prompt += input
+			req := gogpt.CompletionRequest{
+				Model:       gogpt.GPT3TextDavinci003,
+				Prompt:      prompt,
+				MaxTokens:   1000,
+				Temperature: 0.5,
+			}
+
+			fmt.Printf("ChatGPT: ")
+
+			stream, _ := client.GptClient().CreateCompletionStream(ctx, req)
+
+			defer stream.Close()
+
+			c.Renderer.Render(stream)
+		}
+	},
+}
+
+// Execute adds all child commands to the root command and sets flags appropriately.
+// This is called by main.main(). It only needs to happen once to the rootCmd.
+func Execute() {
+	err := rootCmd.Execute()
+	if err != nil {
+		os.Exit(1)
+	}
+}
+
+func init() {
+	// Here you will define your flags and configuration settings.
+	// Cobra supports persistent flags, which, if defined here,
+	// will be global for your application.
+
+	// rootCmd.PersistentFlags().StringVar(&cfgFile, "config", "", "config file (default is $HOME/.chat.yaml)")
+
+	// Cobra also supports local flags, which will only run
+	// when this action is called directly.
+	rootCmd.Flags().BoolP("toggle", "t", false, "Help message for toggle")
+}
+
+// @TODO DRY, duplication in ./main.go
+func getOptions(args []string) []string {
+	var opts []string
+	for _, arg := range args {
+		if strings.HasPrefix(arg, "--") {
+			opts = append(opts, arg)
+		}
+	}
+	return opts
+}
diff --git a/config/main.go b/config/main.go
new file mode 100644
index 0000000..ced9710
--- /dev/null
+++ b/config/main.go
@@ -0,0 +1,155 @@
+package config
+
+import (
+	"bufio"
+	"errors"
+	"fmt"
+	"os"
+	"path"
+	"runtime"
+
+	"github.com/nemoden/chat/renderer"
+)
+
+var (
+	ConfigDir      string = getConfigDir()
+	CacheDir       string = getCacheDir()
+	ApiKeyFilePath string = getApiKeyFilePath()
+	InitPrompt     string = `Please initialise chat using the init command:
+
+$ chat init
+`
+	// @TODO revisit instructions
+	TokenFileDoesntExistPrompt string = fmt.Sprintf(`Oops. Looks like your token file %s doesn't exist.
+
+Please obtain the openai API key from their website https://platform.openai.com/account/api-keys
+
+Once you have the API key, you can either add it manually to %s:
+
+$ echo "<your-api-key>" > %s
+
+Or if you didn't run chat init, it's adviced that you do this instead:
+
+$ chat init
+
+Alternatively, you can provide a token using environment variable %s. How to set it depends on your shell, i.e. 
+
+- for bash shell, add export %s=<your-api-key> to your ~/.bash_profile
+- for zsh shell, add export %s=<your-api-key> to your ~/.zsh_profile
+- for fish shell, add set -x %s <your-api-key> to your ~/.config/fish/config.fish
+`, ApiKeyFilePath, ApiKeyFilePath, ApiKeyFilePath, API_KEY_ENV_VAR_NAME, API_KEY_ENV_VAR_NAME, API_KEY_ENV_VAR_NAME, API_KEY_ENV_VAR_NAME)
+
+	TokenFileNotReadablePrompt string = fmt.Sprintf(`Oops. Looks like your token file %s is not readable.
+
+chat stores the api token in that file.
+
+Another option is to store the API key in the environment variable. How to set it depends on your shell, i.e. 
+
+- for bash shell, add export %s=<your-api-key> to your ~/.bash_profile
+- for zsh shell, add export %s=<your-api-key> to your ~/.zsh_profile
+- for fish shell, add set -x %s <your-api-key> to your ~/.config/fish/config.fish
+`, ApiKeyFilePath, API_KEY_ENV_VAR_NAME, API_KEY_ENV_VAR_NAME, API_KEY_ENV_VAR_NAME)
+)
+
+var (
+	ErrApiTokenFileDoesntExist        = errors.New(fmt.Sprintf("API key file %s doesn't exist", ApiKeyFilePath))
+	ErrCantOpenApiTokenFileForReading = errors.New(fmt.Sprintf("Can not open API key file %s for reading", ApiKeyFilePath))
+)
+
+const (
+	APP_NAME             = "chat"
+	API_KEY_ENV_VAR_NAME = "CHAT_GPT_API_TOKEN"
+	API_KEY_SOURCE_ENV   = "env"
+	API_KEY_SOURCE_FILE  = "file"
+)
+
+type Config struct {
+	Renderer renderer.Renderer
+	Format   string
+}
+
+func inSlice(what string, slice []string) bool {
+	for _, i := range slice {
+		if what == i {
+			return true
+		}
+	}
+	return false
+}
+func LoadConfig(optionsOverride []string) *Config {
+	var r renderer.Renderer
+	var format string
+	if inSlice("--md", optionsOverride) {
+		r = renderer.NewMarkdownRenderer(os.Stdout, "ChatGPT: ")
+		format = "markdown"
+	} else {
+		r = renderer.NewPassthruRenderer(os.Stdout, "ChatGPT: ")
+		format = ""
+	}
+	return &Config{
+		Renderer: r,
+		Format:   format,
+	}
+}
+
+func LoadApiKey() (string, string, error) {
+	apiKey := os.Getenv(API_KEY_ENV_VAR_NAME)
+	if apiKey != "" {
+		return apiKey, API_KEY_SOURCE_ENV, nil
+	}
+	_, err := os.Stat(ApiKeyFilePath)
+	if err != nil {
+		return "", "", ErrApiTokenFileDoesntExist
+	}
+	file, err := os.Open(ApiKeyFilePath)
+	if err != nil {
+		return "", "", ErrCantOpenApiTokenFileForReading
+	}
+	defer file.Close()
+
+	scanner := bufio.NewScanner(file)
+	scanner.Split(bufio.ScanWords)
+	scanner.Scan()
+	return scanner.Text(), API_KEY_SOURCE_FILE, nil
+}
+
+func getCacheDir() string {
+	var dir string
+	switch runtime.GOOS {
+	case "darwin", "linux", "freebsd", "openbsd":
+		dir = os.Getenv("XDG_CACHE_HOME")
+		if dir != "" {
+			return dir
+		}
+		home, _ := os.UserHomeDir()
+		return path.Join(home, ".cache", APP_NAME)
+	default:
+		dir, _ := os.UserConfigDir()
+		return dir
+	}
+}
+
+func getConfigDir() string {
+	var dir string
+	switch runtime.GOOS {
+	case "darwin", "linux", "freebsd", "openbsd":
+		dir = os.Getenv("XDG_CONFIG_HOME")
+		if dir != "" {
+			return dir
+		}
+		home, _ := os.UserHomeDir()
+		return path.Join(home, ".config", APP_NAME)
+	default:
+		dir, _ := os.UserConfigDir()
+		return dir
+	}
+}
+
+func getApiKeyFilePath() string {
+	home, _ := os.UserHomeDir()
+	return path.Join(home, "."+APP_NAME)
+}
+
+func StoreApiToken(token string) bool {
+	return true
+}
diff --git a/go.mod b/go.mod
new file mode 100644
index 0000000..1791bd9
--- /dev/null
+++ b/go.mod
@@ -0,0 +1,29 @@
+module github.com/nemoden/chat
+
+go 1.19
+
+require (
+	github.com/alecthomas/chroma v0.10.0 // indirect
+	github.com/aymanbagabas/go-osc52 v1.0.3 // indirect
+	github.com/aymerick/douceur v0.2.0 // indirect
+	github.com/charmbracelet/glamour v0.6.0 // indirect
+	github.com/dlclark/regexp2 v1.4.0 // indirect
+	github.com/gorilla/css v1.0.0 // indirect
+	github.com/gosuri/uilive v0.0.4 // indirect
+	github.com/inconshreveable/mousetrap v1.0.1 // indirect
+	github.com/lucasb-eyer/go-colorful v1.2.0 // indirect
+	github.com/mattn/go-isatty v0.0.16 // indirect
+	github.com/mattn/go-runewidth v0.0.14 // indirect
+	github.com/microcosm-cc/bluemonday v1.0.21 // indirect
+	github.com/muesli/reflow v0.3.0 // indirect
+	github.com/muesli/termenv v0.13.0 // indirect
+	github.com/olekukonko/tablewriter v0.0.5 // indirect
+	github.com/rivo/uniseg v0.2.0 // indirect
+	github.com/sashabaranov/go-gpt3 v1.0.0 // indirect
+	github.com/spf13/cobra v1.6.1 // indirect
+	github.com/spf13/pflag v1.0.5 // indirect
+	github.com/yuin/goldmark v1.5.2 // indirect
+	github.com/yuin/goldmark-emoji v1.0.1 // indirect
+	golang.org/x/net v0.0.0-20221002022538-bcab6841153b // indirect
+	golang.org/x/sys v0.0.0-20220811171246-fbc7d0a398ab // indirect
+)
diff --git a/go.sum b/go.sum
new file mode 100644
index 0000000..1a2e040
--- /dev/null
+++ b/go.sum
@@ -0,0 +1,65 @@
+github.com/alecthomas/chroma v0.10.0 h1:7XDcGkCQopCNKjZHfYrNLraA+M7e0fMiJ/Mfikbfjek=
+github.com/alecthomas/chroma v0.10.0/go.mod h1:jtJATyUxlIORhUOFNA9NZDWGAQ8wpxQQqNSB4rjA/1s=
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+golang.org/x/net v0.0.0-20221002022538-bcab6841153b/go.mod h1:YDH+HFinaLZZlnHAfSS6ZXJJ9M9t4Dl22yv3iI2vPwk=
+golang.org/x/sys v0.0.0-20210615035016-665e8c7367d1/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.0.0-20220728004956-3c1f35247d10/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.0.0-20220811171246-fbc7d0a398ab h1:2QkjZIsXupsJbJIdSjjUOgWK3aEtzyuh2mPt3l/CkeU=
+golang.org/x/sys v0.0.0-20220811171246-fbc7d0a398ab/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/term v0.0.0-20210927222741-03fcf44c2211/go.mod h1:jbD1KX2456YbFQfuXm/mYQcufACuNUgVhRMnK/tPxf8=
+golang.org/x/text v0.3.7/go.mod h1:u+2+/6zg+i71rQMx5EYifcz6MCKuco9NR6JIITiCfzQ=
+golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
+gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
diff --git a/main.go b/main.go
new file mode 100644
index 0000000..88e787d
--- /dev/null
+++ b/main.go
@@ -0,0 +1,78 @@
+/*
+Copyright © 2023 Kirill Kovalchuk <the.nemoden@gmail.com>
+*/
+package main
+
+import (
+	"context"
+	"fmt"
+	"os"
+	"strings"
+
+	"github.com/nemoden/chat/chat"
+	"github.com/nemoden/chat/cmd"
+	"github.com/nemoden/chat/config"
+	gogpt "github.com/sashabaranov/go-gpt3"
+)
+
+func main() {
+	args := os.Args[1:]
+	options := getOptions(args)
+	positionalArgs := getPotisionalArgs(args)
+	if len(positionalArgs) > 0 {
+		subcommands := cmd.GetSubcommandsMap()
+		// no positional args
+		_, ok := subcommands[positionalArgs[0]]
+		// we have no such subcommand, chat implied.
+		if !ok {
+			c := config.LoadConfig(options)
+			input := strings.Join(positionalArgs, " ")
+			prompt := ""
+			if c.Format == "markdown" {
+				prompt += "Return response in markdown format. Prompt on a new line:\n"
+			}
+			prompt += input
+			client, err := chat.NewClient(c)
+			if err != nil {
+				fmt.Println(err)
+				os.Exit(0)
+			}
+			ctx := context.Background()
+			request := gogpt.CompletionRequest{
+				Model:       gogpt.GPT3TextDavinci003,
+				Prompt:      prompt,
+				MaxTokens:   1000,
+				Temperature: 0.5,
+			}
+			response, _ := client.GptClient().CreateCompletionStream(ctx, request)
+			c.Renderer.Render(response)
+			os.Exit(0)
+		}
+	}
+	cmd.Execute()
+}
+
+func getOptions(args []string) []string {
+	var opts []string
+	for _, arg := range args {
+		if strings.HasPrefix(arg, "--") {
+			opts = append(opts, arg)
+		}
+	}
+	return opts
+}
+
+func getPotisionalArgs(args []string) []string {
+	i := 0
+	for idx, arg := range args {
+		if strings.HasPrefix(arg, "--") {
+			i = idx + 1
+		} else {
+			break
+		}
+	}
+	if len(args) >= i {
+		return args[i:]
+	}
+	return []string{}
+}
diff --git a/renderer/main.go b/renderer/main.go
new file mode 100644
index 0000000..1b78ea0
--- /dev/null
+++ b/renderer/main.go
@@ -0,0 +1,10 @@
+package renderer
+
+import (
+	gogpt "github.com/sashabaranov/go-gpt3"
+)
+
+type Renderer interface {
+	// Renders response from ChatGPT API to a file. Returns the output as a string.
+	Render(stream *gogpt.CompletionStream) string
+}
diff --git a/renderer/markdown.go b/renderer/markdown.go
new file mode 100644
index 0000000..6395f89
--- /dev/null
+++ b/renderer/markdown.go
@@ -0,0 +1,51 @@
+package renderer
+
+import (
+	"errors"
+	"fmt"
+	"io"
+	"os"
+
+	"github.com/charmbracelet/glamour"
+	"github.com/gosuri/uilive"
+	gogpt "github.com/sashabaranov/go-gpt3"
+)
+
+type MarkdownRenderer struct {
+	out    *os.File
+	prefix string
+}
+
+func NewMarkdownRenderer(out *os.File, prefix string) *MarkdownRenderer {
+	return &MarkdownRenderer{out, prefix}
+}
+
+func (r *MarkdownRenderer) Render(stream *gogpt.CompletionStream) string {
+	glamourRenderer, _ := glamour.NewTermRenderer(glamour.WithAutoStyle(), glamour.WithEmoji(), glamour.WithPreservedNewLines())
+	writer := uilive.New()
+	writer.Out = r.out
+	writer.Start()
+	defer writer.Stop()
+	previousResponse := ""
+	var currentResponse string
+	wholeResponse := ""
+	for {
+		response, err := stream.Recv()
+
+		if errors.Is(err, io.EOF) {
+			fmt.Fprintf(writer, "EOF: Printing a new line")
+			fmt.Fprintf(writer, "\n")
+			previousResponse = ""
+			break
+		}
+
+		if len(response.Choices) > 0 {
+			wholeResponse += response.Choices[0].Text
+			currentResponse = previousResponse + response.Choices[0].Text
+			out, _ := glamourRenderer.Render(currentResponse)
+			fmt.Fprintf(writer, out)
+			previousResponse = currentResponse
+		}
+	}
+	return wholeResponse
+}
diff --git a/renderer/passthru.go b/renderer/passthru.go
new file mode 100644
index 0000000..973ad9e
--- /dev/null
+++ b/renderer/passthru.go
@@ -0,0 +1,42 @@
+package renderer
+
+import (
+	"bufio"
+	"errors"
+	"io"
+	"os"
+
+	gogpt "github.com/sashabaranov/go-gpt3"
+)
+
+// Passthru renderer simlpy passes thru the response from ChatGPT API and renders it as is.
+type PassthruRenderer struct {
+	out    *os.File
+	prefix string
+}
+
+func NewPassthruRenderer(out *os.File, prefix string) *PassthruRenderer {
+	return &PassthruRenderer{out, prefix}
+}
+
+func (r *PassthruRenderer) Render(stream *gogpt.CompletionStream) string {
+	wholeResponse := ""
+	writer := bufio.NewWriter(r.out)
+	for {
+		response, err := stream.Recv()
+
+		if errors.Is(err, io.EOF) {
+			writer.WriteString("EOF: Printing a new line")
+			writer.WriteString("\n")
+			writer.Flush()
+			break
+		}
+
+		if len(response.Choices) > 0 {
+			wholeResponse += response.Choices[0].Text
+			writer.WriteString(response.Choices[0].Text)
+			writer.Flush()
+		}
+	}
+	return wholeResponse
+}