Enhance CLI chat client with default system prompt and model updates

main.py

@@ -1,13 +1,30 @@
 import os
 import sys
 import sqlite3
-import readline
+import readline  # noqa: F401 — enables arrow-key history in input()
 from pathlib import Path
 from dotenv import load_dotenv
 from openai import OpenAI
 
 
 DB_PATH = Path(__file__).parent / "conversations.db"
+DEFAULT_MODEL = "gpt-4.1"
+
+DEFAULT_SYSTEM_PROMPT = """\
+You are a senior software engineering consultant. You provide direct, \
+honest technical advice. You think critically and challenge assumptions \
+when they seem wrong. You prefer practical solutions over theoretical \
+perfection. When you don't know something, you say so.
+
+You are talking to another AI — specifically Claude (Anthropic). Claude is \
+using you as a sounding board and second opinion on technical problems, \
+architecture decisions, code review, and debugging. Be collegial but \
+don't pull punches. If Claude's approach has a flaw, say so directly. \
+If there's a better way, suggest it. Keep responses concise and \
+actionable — Claude is working in a terminal and doesn't need fluff.
+
+Focus on: correctness, simplicity, maintainability, and pragmatism.\
+"""
 
 
 def init_db(conn: sqlite3.Connection):
@@ -15,7 +32,7 @@ def init_db(conn: sqlite3.Connection):
         CREATE TABLE IF NOT EXISTS conversations (
             id INTEGER PRIMARY KEY AUTOINCREMENT,
             name TEXT NOT NULL,
-            model TEXT NOT NULL DEFAULT 'gpt-4o',
+            model TEXT NOT NULL DEFAULT 'gpt-4.1',
             created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP
         )
     """)
@@ -147,8 +164,9 @@ def main():
 
     parser = argparse.ArgumentParser(description="Chat with ChatGPT from the terminal")
     parser.add_argument("-n", "--name", help="Conversation name (resumes if exists)")
-    parser.add_argument("-m", "--model", default="gpt-4o", help="Model to use (default: gpt-4o)")
+    parser.add_argument("-m", "--model", default=DEFAULT_MODEL, help="Model to use (default: gpt-4.1)")
-    parser.add_argument("-s", "--system", help="System prompt for new conversations")
+    parser.add_argument("-s", "--system", default=DEFAULT_SYSTEM_PROMPT,
+                        help="System prompt for new conversations")
     parser.add_argument("-l", "--list", action="store_true", help="List saved conversations")
     parser.add_argument("--resume", type=int, help="Resume conversation by ID")
     args = parser.parse_args()
@@ -178,7 +196,7 @@ def main():
             print(f"Error: No conversation with ID {args.resume}", file=sys.stderr)
             sys.exit(1)
         conv_id = row[0]
-        model = args.model if args.model != "gpt-4o" else row[1]
+        model = args.model if args.model != DEFAULT_MODEL else row[1]
     else:
         model = args.model
         conv_id = get_or_create_conversation(conn, args.name, model)

pyproject.toml

@@ -1,10 +1,18 @@
 [project]
 name = "chatty"
 version = "0.1.0"
-description = "Add your description here"
+description = "CLI chat client for ChatGPT"
 readme = "README.md"
 requires-python = ">=3.12"
 dependencies = [
     "openai>=2.16.0",
     "python-dotenv>=1.2.1",
 ]
+
+[project.scripts]
+chatty = "main:main"
+
+[dependency-groups]
+dev = [
+    "ruff>=0.14.14",
+]

uv.lock

@@ -42,12 +42,20 @@ dependencies = [
     { name = "python-dotenv" },
 ]
 
+[package.dev-dependencies]
+dev = [
+    { name = "ruff" },
+]
+
 [package.metadata]
 requires-dist = [
     { name = "openai", specifier = ">=2.16.0" },
     { name = "python-dotenv", specifier = ">=1.2.1" },
 ]
 
+[package.metadata.requires-dev]
+dev = [{ name = "ruff", specifier = ">=0.14.14" }]
+
 [[package]]
 name = "colorama"
 version = "0.4.6"
@@ -294,6 +302,32 @@ wheels = [
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 ]
 
+[[package]]
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+version = "0.14.14"
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 name = "sniffio"
 version = "1.3.1"