#!/usr/bin/env python3
"""nanocode - minimal claude code alternative"""
import glob as globlib
import hashlib
import json
import os
import random
import re
import readline
import select
import ssl
import subprocess
import sys
import termios
import time
import tty
import unicodedata
import urllib.request
import urllib.parse
from datetime import datetime
OPENROUTER_KEY = os.environ.get("OPENROUTER_API_KEY")
LOCAL_API_KEY = os.environ.get("LOCAL_API_KEY")
API_URL = (
"http://127.0.0.1:8990/v1/messages" if LOCAL_API_KEY
else "https://openrouter.ai/api/v1/messages" if OPENROUTER_KEY
else "https://api.anthropic.com/v1/messages"
)
MODEL = os.environ.get("MODEL",
"anthropic/claude-sonnet-4.5" if LOCAL_API_KEY
else "anthropic/claude-opus-4.5" if OPENROUTER_KEY
else "claude-opus-4-5"
)
# ANSI colors
RESET, BOLD, DIM = "\033[0m", "\033[1m", "\033[2m"
BLUE, CYAN, GREEN, YELLOW, RED = "\033[34m", "\033[36m", "\033[32m", "\033[33m", "\033[31m"
stop_flag = False
def detect_clipboard_image():
"""Detect and return image from clipboard using system commands
Returns:
dict or None: Image content block with metadata, or None if no image
"""
try:
import base64
import tempfile
# Save clipboard image to temp file
temp_file = None
image_data = None
if sys.platform == 'darwin':
# macOS: use pngpaste or osascript
temp_file = tempfile.NamedTemporaryFile(suffix='.png', delete=False)
temp_file.close()
# Try pngpaste first (faster)
result = subprocess.run(
['pngpaste', temp_file.name],
capture_output=True, timeout=5 # Increase timeout for large images
)
if result.returncode != 0:
# Fallback to osascript
script = f'''
set theFile to POSIX file "{temp_file.name}"
try
set theImage to the clipboard as «class PNGf»
set fileRef to open for access theFile with write permission
write theImage to fileRef
close access fileRef
return "success"
on error errMsg
return "error: " & errMsg
end try
'''
result = subprocess.run(
['osascript', '-e', script],
capture_output=True, timeout=5, text=True
)
if not result.stdout.strip().startswith('success'):
print(f"{RED}✗ osascript error: {result.stdout.strip()}{RESET}", flush=True)
os.unlink(temp_file.name)
return None
# Check file size
file_size = os.path.getsize(temp_file.name)
# Read the file
with open(temp_file.name, 'rb') as f:
image_data = f.read()
os.unlink(temp_file.name)
elif sys.platform.startswith('linux'):
# Linux: use xclip
result = subprocess.run(
['xclip', '-selection', 'clipboard', '-t', 'image/png', '-o'],
capture_output=True, timeout=5
)
if result.returncode == 0 and result.stdout:
image_data = result.stdout
else:
return None
elif sys.platform == 'win32':
# Windows: use PowerShell
temp_file = tempfile.NamedTemporaryFile(suffix='.png', delete=False)
temp_file.close()
ps_script = f'''
Add-Type -AssemblyName System.Windows.Forms
$img = [System.Windows.Forms.Clipboard]::GetImage()
if ($img) {{
$img.Save("{temp_file.name}", [System.Drawing.Imaging.ImageFormat]::Png)
exit 0
}} else {{
exit 1
}}
'''
result = subprocess.run(
['powershell', '-Command', ps_script],
capture_output=True, timeout=5
)
if result.returncode == 0:
file_size = os.path.getsize(temp_file.name)
with open(temp_file.name, 'rb') as f:
image_data = f.read()
os.unlink(temp_file.name)
else:
os.unlink(temp_file.name)
return None
else:
return None
if not image_data:
return None
# Get image size (read PNG header)
# PNG signature: 8 bytes, then IHDR chunk with width/height
if len(image_data) > 24 and image_data[:8] == b'\x89PNG\r\n\x1a\n':
width = int.from_bytes(image_data[16:20], 'big')
height = int.from_bytes(image_data[20:24], 'big')
size = (width, height)
else:
size = (0, 0)
# Check if too large
max_size = 1568
if size[0] > max_size or size[1] > max_size:
print(f"\r{YELLOW}⚠ Image {size[0]}x{size[1]} exceeds {max_size}x{max_size}, may be slow{RESET}", flush=True)
import time
time.sleep(1)
# Check file size limit (5MB for Claude API)
if len(image_data) > 5 * 1024 * 1024:
print(f"{RED}✗ Image too large: {len(image_data)/1024/1024:.2f} MB (max 5MB){RESET}", flush=True)
return None
# Encode to base64
base64_data = base64.b64encode(image_data).decode('utf-8')
return {
"type": "image",
"source": {
"type": "base64",
"media_type": "image/png",
"data": base64_data
},
"_metadata": {
"size": size,
"resized": None
}
}
except subprocess.TimeoutExpired as e:
print(f"\r{RED}✗ Timeout: Image too large or system command hung{RESET}", flush=True)
import time
time.sleep(1)
return None
except Exception as e:
return None
def create_opener():
"""Create URL opener with SSL and proxy support"""
proxy = os.environ.get("http_proxy") or os.environ.get("https_proxy")
ssl_ctx = ssl.create_default_context()
ssl_ctx.check_hostname = False
ssl_ctx.verify_mode = ssl.CERT_NONE
handlers = [urllib.request.HTTPSHandler(context=ssl_ctx)]
if proxy: handlers.insert(0, urllib.request.ProxyHandler({"http": proxy, "https": proxy}))
return urllib.request.build_opener(*handlers)
def register_tool(name, desc, params):
"""Register a tool from extension code"""
def decorator(func):
TOOLS[name] = (desc, params, func)
return func
return decorator
def search_extension(args):
"""Search extensions from gist.kitchain.cn"""
query = args.get("query", "")
if not query: return "error: query required"
try:
# Split query into keywords
keywords = query.lower().split()
gist_info = {} # {gist_path: {"hits": count, "title": str, "desc": str, "topics": []}}
opener = create_opener()
# Search each keyword as a topic
for keyword in keywords:
url = f"https://gist.kitchain.cn/topics/{urllib.parse.quote(keyword)}"
html = opener.open(urllib.request.Request(url), timeout=10).read().decode()
# Extract gist URLs and titles
gist_matches = re.findall(
r'([^<]+)',
html
)
for gist_path, title in gist_matches:
if gist_path not in gist_info:
# Extract description and topics for this gist
gist_section = re.search(
rf'{re.escape(gist_path)}.*?'
r'([^<]+)
(.*?)\s*',
html, re.DOTALL
)
desc = ""
topics = []
if gist_section:
desc = gist_section.group(1).strip()
topics_section = gist_section.group(2)
topics = re.findall(r'topics/([^"]+)"[^>]*>([^<]+)<', topics_section)
topics = [t[1] for t in topics] # Extract topic names
gist_info[gist_path] = {
"hits": 0,
"title": title.strip(),
"desc": desc,
"topics": topics,
"filename": title.strip()
}
gist_info[gist_path]["hits"] += 1
if not gist_info: return f"No extensions found: {query}"
# Sort by hit count (descending)
sorted_gists = sorted(gist_info.items(), key=lambda x: x[1]["hits"], reverse=True)[:10]
result = f"Found {len(sorted_gists)} extensions:\n\n"
for gist_path, info in sorted_gists:
result += f"• {info['title']}\n"
if info['desc']:
result += f" {info['desc']}\n"
if info['topics']:
result += f" Topics: {', '.join(info['topics'])}\n"
result += f" Matched: {info['hits']} keyword(s)\n\n"
# Return first gist's load URL
first_gist = sorted_gists[0][0]
first_filename = sorted_gists[0][1]['filename']
result += f"To load the top result:\nload({{\"url\": \"https://gist.kitchain.cn/{first_gist}/raw/HEAD/{first_filename}\"}})"
return result
except Exception as e:
return f"error: {e}"
def load(args):
"""Load extension from URL"""
url = args.get("url")
if not url: return "error: url required"
try:
opener = create_opener()
code = opener.open(urllib.request.Request(url), timeout=10).read().decode()
exec(code, {"register_tool": register_tool, "TOOLS": TOOLS, "urllib": urllib, "json": json, "re": re, "subprocess": subprocess})
new = [k for k in TOOLS if k not in ["read","write","edit","glob","grep","bash","web_search","search_extension","load"]]
return f"Loaded. New tools: {', '.join(new)}"
except Exception as e:
return f"error: {e}"
# --- Tools ---
def read(args):
lines = open(args["path"]).readlines()
offset, limit = args.get("offset", 0), args.get("limit", len(lines))
return "".join(f"{offset+i+1:4}| {l}" for i, l in enumerate(lines[offset:offset+limit]))
def write(args):
filepath = args["path"]
content = args["content"]
print(f"{DIM}[LOG] write: {filepath} ({len(content)} bytes){RESET}", flush=True)
open(filepath, "w").write(content)
print(f"{DIM}[LOG] write completed: {filepath}{RESET}", flush=True)
return "ok"
def edit(args):
filepath = args["path"]
print(f"{DIM}[LOG] edit: {filepath}{RESET}", flush=True)
text = open(filepath).read()
print(f"{DIM}[LOG] edit read: {len(text)} bytes{RESET}", flush=True)
old, new = args["old"], args["new"]
if old not in text: return "error: old_string not found"
count = text.count(old)
if not args.get("all") and count > 1:
return f"error: old_string appears {count} times (use all=true)"
result = text.replace(old, new) if args.get("all") else text.replace(old, new, 1)
print(f"{DIM}[LOG] edit writing: {len(result)} bytes{RESET}", flush=True)
open(filepath, "w").write(result)
print(f"{DIM}[LOG] edit completed: {filepath}{RESET}", flush=True)
return "ok"
def glob(args):
pattern = (args.get("path", ".") + "/" + args["pat"]).replace("//", "/")
files = sorted(globlib.glob(pattern, recursive=True),
key=lambda f: os.path.getmtime(f) if os.path.isfile(f) else 0, reverse=True)
return "\n".join(files) or "none"
def grep(args):
pattern, hits = re.compile(args["pat"]), []
for fp in globlib.glob(args.get("path", ".") + "/**", recursive=True):
try:
for n, l in enumerate(open(fp), 1):
if pattern.search(l): hits.append(f"{fp}:{n}:{l.rstrip()}")
except: pass
return "\n".join(hits[:50]) or "none"
def bash(args):
global stop_flag
proc = subprocess.Popen(args["cmd"], shell=True, stdout=subprocess.PIPE,
stderr=subprocess.STDOUT, text=True)
lines = []
old_settings = termios.tcgetattr(sys.stdin)
try:
tty.setcbreak(sys.stdin.fileno())
if proc.stdout:
import fcntl
fd = proc.stdout.fileno()
fcntl.fcntl(fd, fcntl.F_SETFL, fcntl.fcntl(fd, fcntl.F_GETFL) | os.O_NONBLOCK)
while True:
# Check ESC key
if select.select([sys.stdin], [], [], 0)[0]:
if sys.stdin.read(1) == '\x1b':
stop_flag = True
proc.kill()
lines.append("\n(stopped)")
print(f"\n{YELLOW}⏸ Stopped{RESET}")
break
# Read output
if select.select([proc.stdout], [], [], 0.1)[0]:
line = proc.stdout.readline()
if line:
print(f" {DIM}│ {line.rstrip()}{RESET}", flush=True)
lines.append(line)
# Check if done
if proc.poll() is not None:
remaining = proc.stdout.read()
if remaining:
for line in remaining.split('\n'):
if line:
print(f" {DIM}│ {line.rstrip()}{RESET}", flush=True)
lines.append(line + '\n')
break
if not stop_flag:
proc.wait(timeout=30)
except subprocess.TimeoutExpired:
proc.kill()
lines.append("\n(timeout)")
finally:
termios.tcsetattr(sys.stdin, termios.TCSADRAIN, old_settings)
return "".join(lines).strip() or "(empty)"
def web_search(args):
"""Search web using DuckDuckGo"""
query, max_results = args["query"], args.get("max_results", 5)
try:
url = f"https://html.duckduckgo.com/html/?q={urllib.parse.quote_plus(query)}"
headers = {"User-Agent": "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36"}
opener = create_opener()
html = opener.open(urllib.request.Request(url, headers=headers), timeout=30).read().decode()
# Extract titles and URLs
links = re.findall(r'class="result__a"[^>]+href="([^"]+)"[^>]*>([^<]+)<', html)
# Extract snippets
snippets = re.findall(r'class="result__snippet"[^>]*>([^<]*)<', html)
if not links: return "No results found"
results = []
for i, ((link, title), snippet) in enumerate(zip(links[:max_results], snippets[:max_results] + [""] * max_results), 1):
results.append(f"{i}. {title.strip()}\n URL: {link}\n {snippet.strip()}\n")
return "\n".join(results)
except Exception as e:
return f"error: {e}"
TOOLS = {
"read": ("Read file with line numbers", {"path": "string", "offset": "number?", "limit": "number?"}, read),
"write": ("Write content to file", {"path": "string", "content": "string"}, write),
"edit": ("Replace old with new in file", {"path": "string", "old": "string", "new": "string", "all": "boolean?"}, edit),
"glob": ("Find files by pattern", {"pat": "string", "path": "string?"}, glob),
"grep": ("Search files for regex", {"pat": "string", "path": "string?"}, grep),
"bash": ("Run shell command", {"cmd": "string"}, bash),
"web_search": ("Search the web using DuckDuckGo", {"query": "string", "max_results": "number?"}, web_search),
"search_extension": ("Search for extensions to add new capabilities (GitHub docs, web scraping, APIs, etc)", {"query": "string"}, search_extension),
"load": ("Load extension from URL to add new tools", {"url": "string"}, load),
}
def run_tool(name, args):
try: return TOOLS[name][2](args)
except Exception as e: return f"error: {e}"
def make_schema():
result = []
for name, (desc, params, _) in TOOLS.items():
props, req = {}, []
for pname, ptype in params.items():
opt = ptype.endswith("?")
props[pname] = {"type": "integer" if ptype.rstrip("?") == "number" else ptype.rstrip("?")}
if not opt: req.append(pname)
result.append({"name": name, "description": desc,
"input_schema": {"type": "object", "properties": props, "required": req}})
return result
def call_api(messages, system_prompt, stream=True, enable_thinking=True, use_tools=True):
headers = {"Content-Type": "application/json", "anthropic-version": "2023-06-01"}
if LOCAL_API_KEY: headers["Authorization"] = f"Bearer {LOCAL_API_KEY}"
elif OPENROUTER_KEY: headers["Authorization"] = f"Bearer {OPENROUTER_KEY}"
else: headers["x-api-key"] = os.environ.get("ANTHROPIC_API_KEY", "")
data = {"model": MODEL, "max_tokens": 8192, "system": system_prompt,
"messages": messages, "stream": stream}
if use_tools:
data["tools"] = make_schema()
if enable_thinking and os.environ.get("THINKING"):
data["thinking"] = {"type": "enabled", "budget_tokens": int(os.environ.get("THINKING_BUDGET", "10000"))}
req = urllib.request.Request(API_URL, json.dumps(data).encode(), headers, method="POST")
return create_opener().open(req)
def summarize_changes(user_input, files_modified, checkpoint_manager, checkpoint_id):
"""Use LLM to summarize the changes made in this turn
Args:
user_input: User's request
files_modified: Set of modified file paths
checkpoint_manager: CheckpointManager instance
checkpoint_id: Checkpoint hash to get diff from
Returns:
str: One-line summary of changes
"""
if not files_modified or not checkpoint_id:
return user_input[:50]
try:
# Get diff from git
diff_output = checkpoint_manager._git_command(
"--git-dir", checkpoint_manager.bare_repo,
"show", "--format=", checkpoint_id
)
# Check if diff is empty or error - no actual changes
if not diff_output or diff_output.startswith("error") or len(diff_output.strip()) == 0:
# No diff available, just use user input
return user_input[:50]
# Limit diff size to avoid token overflow (max ~3000 chars)
if len(diff_output) > 3000:
diff_output = diff_output[:3000] + "\n... (truncated)"
summary_prompt = f"""Based on the actual code changes (diff), generate a brief Chinese summary (max 30 Chinese characters).
IMPORTANT: Must be based on the actual code changes, not the user's description.
Code changes (diff):
{diff_output}
User description (for reference only): {user_input}
Requirements:
1. Describe what code/functionality was actually modified
2. Reply in Chinese only, no explanation
3. No quotes
4. Max 30 Chinese characters
Good examples:
- 在 auth.py 添加 JWT 验证
- 修复 parser.py 空指针异常
- 重构 database.py 连接池
- 更新 README 添加安装说明
"""
messages = [{"role": "user", "content": summary_prompt}]
response = call_api(messages, "You are a code change analyzer, skilled at extracting key information from diffs. Reply in Chinese.",
stream=False, enable_thinking=False, use_tools=False)
# Parse non-streaming response
data = json.loads(response.read().decode())
blocks = data.get("content", [])
for block in blocks:
if block.get("type") == "text":
summary = block.get("text", "").strip()
# Remove thinking tags if present
if "" in summary:
# Extract content after
parts = summary.split("")
if len(parts) > 1:
summary = parts[-1].strip()
# Clean up and limit length
summary = summary.replace('"', '').replace("'", "")
if summary and len(summary) <= 80:
return summary
# Fallback to user input
return user_input[:50]
except Exception as e:
# On error, fallback to user input
return user_input[:50]
def process_stream(response):
"""简化的流式处理，支持ESC中断"""
global stop_flag
blocks, current, text_buf, json_buf, think_buf = [], None, "", "", ""
# Save terminal settings
old_settings = termios.tcgetattr(sys.stdin)
try:
tty.setcbreak(sys.stdin.fileno())
for line in response:
if select.select([sys.stdin], [], [], 0)[0]:
ch = sys.stdin.read(1)
if ch == '\x1b': # ESC key
stop_flag = True
print(f"\n{YELLOW}⏸ Stopped{RESET}")
break
line = line.decode("utf-8").strip()
if not line.startswith("data: "): continue
if line == "data: [DONE]": continue
try:
data = json.loads(line[6:])
etype = data.get("type")
if etype == "content_block_start":
block = data.get("content_block", {})
current = {"type": block.get("type"), "id": block.get("id")}
if current["type"] == "text":
text_buf = ""
print(f"\n{CYAN}⏺{RESET} ", end="", flush=True)
elif current["type"] == "thinking":
think_buf = ""
print(f"\n{YELLOW}💭{RESET} {DIM}", end="", flush=True)
elif current["type"] == "tool_use":
current["name"] = block.get("name")
json_buf = ""
elif etype == "content_block_delta":
delta = data.get("delta", {})
dtype = delta.get("type")
if dtype == "text_delta":
text = delta.get("text", "")
text_buf += text
print(text, end="", flush=True)
elif dtype == "thinking_delta":
text = delta.get("thinking", "")
think_buf += text
print(text, end="", flush=True)
elif dtype == "input_json_delta" and current:
json_buf += delta.get("partial_json", "")
elif etype == "content_block_stop" and current:
if current["type"] == "text":
current["text"] = text_buf
print()
elif current["type"] == "thinking":
print(RESET)
elif current["type"] == "tool_use":
try: current["input"] = json.loads(json_buf)
except: current["input"] = {}
blocks.append(current)
current = None
except: pass
finally:
termios.tcsetattr(sys.stdin, termios.TCSADRAIN, old_settings)
return blocks
def get_display_width(text):
"""Get display width of text (CJK chars = 2, others = 1)"""
width = 0
for char in text:
if unicodedata.east_asian_width(char) in ('F', 'W'):
width += 2
else:
width += 1
return width
def format_tool_preview(name, args):
"""Format tool call preview based on tool type"""
if name == "read":
path = args.get("path", "")
offset = args.get("offset")
limit = args.get("limit")
if offset or limit:
return f"{path}, offset={offset or 0}, limit={limit or 'all'}"
return path
elif name == "write":
path = args.get("path", "")
content = args.get("content", "")
return f"{path}, {len(content)} bytes"
elif name == "edit":
path = args.get("path", "")
old = args.get("old", "")
new = args.get("new", "")
all_flag = args.get("all", False)
old_preview = old[:20] + "..." if len(old) > 20 else old
new_preview = new[:20] + "..." if len(new) > 20 else new
flag_str = ", all=true" if all_flag else ""
return f"{path}: '{old_preview}' → '{new_preview}'{flag_str}"
elif name == "bash":
return args.get("cmd", "")
elif name == "glob":
pattern = args.get("pat", "")
path = args.get("path", ".")
return f"{pattern} in {path}"
elif name == "grep":
pattern = args.get("pat", "")
path = args.get("path", ".")
return f"/{pattern}/ in {path}"
elif name == "web_search":
query = args.get("query", "")
max_results = args.get("max_results", 5)
return f"{query}, max={max_results}"
elif name == "search_extension":
return args.get("query", "")
elif name == "load":
url = args.get("url", "")
# Show filename from URL
filename = url.split("/")[-1] if url else ""
return filename or url
else:
# Fallback: show first value
return str(list(args.values())[0])[:50] if args else ""
def format_tool_result(name, result):
"""Format tool result preview based on tool type"""
if not result:
return "(empty)"
lines = result.split("\n")
# For simple results (ok, error, etc), show as-is
if len(lines) == 1 and len(result) < 80:
return result
# For multi-line results
first_line = lines[0][:60]
if len(lines[0]) > 60:
first_line += "..."
if len(lines) > 1:
return f"{first_line} +{len(lines)-1} lines"
return first_line
def is_file_in_project(filepath, project_path):
"""Check if file is within project directory"""
try:
abs_file = os.path.abspath(filepath)
abs_project = os.path.abspath(project_path)
# Check if file is under project directory
return abs_file.startswith(abs_project + os.sep) or abs_file == abs_project
except:
return False
def read_multiline_input(prefill=""):
"""Read multiline input. Enter to submit, Alt+Enter for newline.
Supports pasting images from clipboard.
Args:
prefill: Text to prefill in the input box
Returns:
tuple: (text: str, images: list[dict])
"""
lines = []
current = prefill
cursor_pos = len(prefill) # Cursor at end of prefill text
images = [] # Store pasted images
# Enable bracketed paste mode
print("\033[?2004h", end="", flush=True)
old_settings = termios.tcgetattr(sys.stdin)
try:
tty.setcbreak(sys.stdin.fileno())
# Disable LNEXT (Ctrl+V) so it can be used for paste
attrs = termios.tcgetattr(sys.stdin)
attrs[6][termios.VLNEXT] = 0 # Disable literal-next
termios.tcsetattr(sys.stdin, termios.TCSANOW, attrs)
print(f"{BOLD}{BLUE}❯{RESET} {current}", end="", flush=True)
while True:
ch = sys.stdin.read(1)
if ch == '\x03': # Ctrl+C - clear input
lines.clear()
current = ""
cursor_pos = 0
print("\r\033[K", end="", flush=True)
print(f"{BOLD}{BLUE}❯{RESET} ", end="", flush=True)
continue
if ch == '\x05': # Ctrl+E
raise EOFError
if ch == '\x16': # Ctrl+V - paste image
img_block = detect_clipboard_image()
if img_block:
# Image detected!
images.append(img_block)
size = img_block.get('_metadata', {}).get('size', (0, 0))
resized = img_block.get('_metadata', {}).get('resized')
# Create image marker
if resized:
img_marker = f"[📷 Image {len(images)}: {size[0]}x{size[1]} → {resized[0]}x{resized[1]}]"
else:
img_marker = f"[📷 Image {len(images)}: {size[0]}x{size[1]}]"
# Insert marker at cursor position
current = current[:cursor_pos] + img_marker + current[cursor_pos:]
cursor_pos += len(img_marker)
# Redraw current line
prefix = f"{BOLD}{BLUE}{'│' if lines else '❯'}{RESET} "
print(f"\r\033[K{prefix}{current}", end="", flush=True)
else:
# No image in clipboard
print(f"\r{YELLOW}⚠ No image in clipboard{RESET}", flush=True)
import time
time.sleep(1)
# Redraw current line
prefix = f"{BOLD}{BLUE}{'│' if lines else '❯'}{RESET} "
print(f"\r\033[K{prefix}{current}", end="", flush=True)
continue
if ch == '\x1b': # Escape sequence
next_ch = sys.stdin.read(1)
if next_ch in ('\r', '\n'): # Alt+Enter
lines.append(current)
current = ""
cursor_pos = 0
print(f"\n{BOLD}{BLUE}│{RESET} ", end="", flush=True)
elif next_ch == '[': # Escape sequence
seq = sys.stdin.read(1)
if seq == 'C': # Right arrow
if cursor_pos < len(current):
# Get display width of character at cursor
char_width = get_display_width(current[cursor_pos])
cursor_pos += 1
# Move cursor by actual display width
if char_width == 2:
print("\033[2C", end="", flush=True)
else:
print("\033[C", end="", flush=True)
elif seq == 'D': # Left arrow
if cursor_pos > 0:
cursor_pos -= 1
# Get display width of character before cursor
char_width = get_display_width(current[cursor_pos])
# Move cursor by actual display width
if char_width == 2:
print("\033[2D", end="", flush=True)
else:
print("\033[D", end="", flush=True)
elif seq == '2': # Bracketed paste start: ESC[200~
rest = sys.stdin.read(3) # Read "00~"
if rest == '00~':
# Read pasted content until ESC[201~
paste_buf = ""
while True:
c = sys.stdin.read(1)
if c == '\x1b':
# Check for [201~
peek = sys.stdin.read(5)
if peek == '[201~':
break
else:
paste_buf += c + peek
else:
paste_buf += c
# Process pasted content
paste_lines = paste_buf.split('\n')
if len(paste_lines) == 1:
# Single line paste
current = current[:cursor_pos] + paste_lines[0] + current[cursor_pos:]
cursor_pos += len(paste_lines[0])
prefix = f"{BOLD}{BLUE}{'│' if lines else '❯'}{RESET} "
print(f"\r\033[K{prefix}{current}", end="", flush=True)
else:
# Multi-line paste
# First line appends to current
first_line = current[:cursor_pos] + paste_lines[0]
print(paste_lines[0], end="", flush=True)
if first_line:
lines.append(first_line)
# Middle lines
for line in paste_lines[1:-1]:
print(f"\n{BOLD}{BLUE}│{RESET} {line}", end="", flush=True)
lines.append(line)
# Last line becomes new current
current = paste_lines[-1]
cursor_pos = len(current)
print(f"\n{BOLD}{BLUE}│{RESET} {current}", end="", flush=True)
continue
if ch in ('\r', '\n'): # Enter - submit
if current:
lines.append(current)
print()
break
if ch in ('\x7f', '\x08'): # Backspace
if cursor_pos > 0:
# Delete character before cursor
current = current[:cursor_pos-1] + current[cursor_pos:]
cursor_pos -= 1
# Redraw current line
prefix = f"{BOLD}{BLUE}{'│' if lines else '❯'}{RESET} "
print(f"\r\033[K{prefix}{current}", end="", flush=True)
# Move cursor back to position
if cursor_pos < len(current):
# Calculate display width from cursor to end
remaining_width = get_display_width(current[cursor_pos:])
print(f"\033[{remaining_width}D", end="", flush=True)
elif lines:
# Merge with previous line
prev_line = lines.pop()
cursor_pos = len(prev_line) # Cursor at end of previous line
current = prev_line + current
# Move up and redraw
print("\033[A\033[K", end="", flush=True)
prefix = f"{BOLD}{BLUE}{'│' if lines else '❯'}{RESET} "
print(f"\r{prefix}{current}", end="", flush=True)
if cursor_pos < len(current):
# Calculate display width from cursor to end
remaining_width = get_display_width(current[cursor_pos:])
print(f"\033[{remaining_width}D", end="", flush=True)
continue
if ch.isprintable() or ch == '\t':
# Insert character at cursor position
current = current[:cursor_pos] + ch + current[cursor_pos:]
cursor_pos += 1
# Redraw from cursor position
print(f"{ch}{current[cursor_pos:]}", end="", flush=True)
# Move cursor back if needed
if cursor_pos < len(current):
# Calculate display width from cursor to end
remaining_width = get_display_width(current[cursor_pos:])
print(f"\033[{remaining_width}D", end="", flush=True)
finally:
# Disable bracketed paste mode
print("\033[?2004l", end="", flush=True)
termios.tcsetattr(sys.stdin, termios.TCSADRAIN, old_settings)
text = "\n".join(lines).strip()
return text, images
def main():
global stop_flag
# Parse command line arguments
continue_session = "-c" in sys.argv or "--continue" in sys.argv
list_sessions = "-l" in sys.argv or "--list" in sys.argv
# Disable Ctrl+C signal
old_settings = termios.tcgetattr(sys.stdin)
new_settings = termios.tcgetattr(sys.stdin)
new_settings[3] = new_settings[3] & ~termios.ISIG # Disable signal generation
termios.tcsetattr(sys.stdin, termios.TCSADRAIN, new_settings)
try:
proxy = os.environ.get("http_proxy") or os.environ.get("https_proxy")
proxy_info = f" | {DIM}🌐 {proxy}{RESET}" if proxy else ""
thinking_info = f" | {YELLOW}💭{RESET}" if os.environ.get("THINKING") else ""
if list_sessions:
session_mode = f" | {YELLOW}Select{RESET}"
elif continue_session:
session_mode = f" | {GREEN}Continue{RESET}"
else:
session_mode = f" | {CYAN}New{RESET}"
print(f"{BOLD}nanocode{RESET} | {DIM}{MODEL} | {os.getcwd()}{proxy_info}{thinking_info}{session_mode}{RESET}")
print(f"{DIM}Shortcuts: Enter=submit | Alt+Enter=newline | Ctrl+V=paste image | Ctrl+C=clear | Ctrl+E=exit | ESC=stop{RESET}")
print(f"{DIM}Commands: /c [all|baseline|] | /ca | /t | /clear{RESET}")
print(f"{DIM}Usage: nanocode (new) | nanocode -c (continue) | nanocode -l (select){RESET}\n")
selected_session_id = None
if list_sessions:
selected_session_id = select_session_interactive()
if not selected_session_id:
print(f"{DIM}Exiting...{RESET}")
return
run_main_loop(continue_session, selected_session_id)
finally:
termios.tcsetattr(sys.stdin, termios.TCSADRAIN, old_settings)
def select_session_interactive():
"""Display sessions and let user select one
Returns:
session_id: Selected session ID, or None if cancelled
"""
session_manager = SessionManager(os.getcwd())
sessions = session_manager.list_sessions()[:10] # Limit to 10 most recent
if not sessions:
print(f"{YELLOW}⚠ No previous sessions found{RESET}")
print(f"{DIM}Starting new session...{RESET}\n")
return None
print(f"{BOLD}📂 Recent Sessions:{RESET}\n")
for i, sess_info in enumerate(sessions, 1):
created = datetime.fromtimestamp(sess_info['metadata']['created_at']).strftime('%Y-%m-%d %H:%M')
last_active = datetime.fromtimestamp(sess_info['metadata']['last_active']).strftime('%Y-%m-%d %H:%M')
desc = sess_info['metadata'].get('description', '(no description)')
# Git info
git_commit = sess_info['metadata'].get('git_commit')
git_branch = sess_info['metadata'].get('git_branch')
git_dirty = sess_info['metadata'].get('git_dirty', False)
print(f"{CYAN}{i}.{RESET} {BOLD}{sess_info['session_id']}{RESET}")
print(f" {desc}")
git_info = ""
if git_commit and git_branch:
dirty_mark = f"{YELLOW}*{RESET}" if git_dirty else ""
git_info = f" | Git: {git_branch}@{git_commit}{dirty_mark}"
print(f" Created: {created} | Last: {last_active} | {sess_info['message_count']} messages{git_info}\n")
print(f"{DIM}Enter session number (1-{len(sessions)}), or press Enter for new session:{RESET}")
try:
choice = input(f"{BOLD}{BLUE}❯{RESET} ").strip()
if not choice:
# Empty input = new session
return None
try:
idx = int(choice) - 1
if 0 <= idx < len(sessions):
return sessions[idx]['session_id']
else:
print(f"{RED}✗ Invalid number{RESET}")
return None
except ValueError:
print(f"{RED}✗ Invalid input{RESET}")
return None
except (EOFError, KeyboardInterrupt):
return None
def run_main_loop(continue_session=False, selected_session_id=None):
# Initialize session manager
session_manager = SessionManager(os.getcwd())
# Load or create session based on parameters
if selected_session_id:
# Load specific session selected by user
session = session_manager.load_session(selected_session_id)
if session:
git_info = ""
git_commit = session.metadata.get('git_commit')
git_branch = session.metadata.get('git_branch')
if git_commit and git_branch:
git_dirty = session.metadata.get('git_dirty', False)
dirty_mark = f"{YELLOW}*{RESET}" if git_dirty else ""
git_info = f" | Git: {git_branch}@{git_commit}{dirty_mark}"
print(f"{GREEN}✓ Loaded session: {session.session_id}{RESET}")
print(f"{DIM} └─ {len(session.messages)} messages{git_info}{RESET}")
# Check for conflicts
conflicts = session.detect_conflicts()
if conflicts:
print(f"\n{YELLOW}⚠ File conflicts detected:{RESET}")
for filepath in conflicts[:5]:
print(f" - {filepath}")
if len(conflicts) > 5:
print(f" ... and {len(conflicts)-5} more")
print(f"\n{DIM}These files have been modified outside this session.{RESET}")
confirm = input(f"{BOLD}Continue anyway? (y/N/u=update): {RESET}").strip().lower()
if confirm == 'u':
session.update_file_states()
session_manager.save_session()
print(f"{GREEN}✓ Updated file states{RESET}\n")
elif confirm != 'y':
print(f"{DIM}Creating new session instead...{RESET}\n")
session_manager.create_session()
else:
print()
else:
print()
else:
print(f"{RED}✗ Failed to load session{RESET}")
print(f"{GREEN}✓ Creating new session instead{RESET}\n")
session_manager.create_session()
elif continue_session:
# Continue last session
last_session = session_manager.load_last_session()
if last_session:
git_info = ""
git_commit = last_session.metadata.get('git_commit')
git_branch = last_session.metadata.get('git_branch')
if git_commit and git_branch:
git_dirty = last_session.metadata.get('git_dirty', False)
dirty_mark = f"{YELLOW}*{RESET}" if git_dirty else ""
git_info = f" | Git: {git_branch}@{git_commit}{dirty_mark}"
print(f"{GREEN}✓ Continued session: {last_session.session_id}{RESET}")
print(f"{DIM} └─ {len(last_session.messages)} messages{git_info}{RESET}")
# Check for conflicts
conflicts = last_session.detect_conflicts()
if conflicts:
print(f"\n{YELLOW}⚠ File conflicts detected:{RESET}")
for filepath in conflicts[:5]:
print(f" - {filepath}")
if len(conflicts) > 5:
print(f" ... and {len(conflicts)-5} more")
print(f"\n{DIM}These files have been modified outside this session.{RESET}")
confirm = input(f"{BOLD}Continue anyway? (y/N/u=update): {RESET}").strip().lower()
if confirm == 'u':
last_session.update_file_states()
session_manager.save_session()
print(f"{GREEN}✓ Updated file states{RESET}\n")
elif confirm != 'y':
print(f"{DIM}Creating new session instead...{RESET}\n")
session_manager.create_session()
else:
print()
else:
print()
else:
# No previous session, create new one
session_manager.create_session()
print(f"{YELLOW}⚠ No previous session found{RESET}")
print(f"{GREEN}✓ Created new session: {session_manager.current_session.session_id}{RESET}\n")
else:
# Always create new session by default
# Try to detect parent from last session's latest checkpoint
parent_checkpoint = None
parent_session = None
last_session = session_manager.load_last_session()
if last_session:
# Get the latest checkpoint from last session
checkpoints = session_manager.checkpoint_manager.list_checkpoints(show_all=False)
if checkpoints:
parent_checkpoint = checkpoints[0][0] # Latest checkpoint hash
parent_session = last_session.session_id
session_manager.create_session(
parent_checkpoint=parent_checkpoint,
parent_session=parent_session
)
git_info = ""
git_commit = session_manager.current_session.metadata.get('git_commit')
git_branch = session_manager.current_session.metadata.get('git_branch')
if git_commit and git_branch:
git_dirty = session_manager.current_session.metadata.get('git_dirty', False)
dirty_mark = f"{YELLOW}*{RESET}" if git_dirty else ""
git_info = f" | Git: {git_branch}@{git_commit}{dirty_mark}"
if parent_checkpoint:
print(f"{GREEN}✓ Created new session: {session_manager.current_session.session_id}{RESET}")
print(f"{DIM} └─ Branched from {parent_session[:8]}... @ {parent_checkpoint}{git_info}{RESET}\n")
else:
print(f"{GREEN}✓ Created new session: {session_manager.current_session.session_id}{RESET}")
if git_info:
print(f"{DIM} └─{git_info}{RESET}\n")
else:
print()
files_modified = set()
auto_checkpoint = True
current_time = datetime.now().strftime("%Y-%m-%d %H:%M:%S")
system_prompt = f"""Concise coding assistant. cwd: {os.getcwd()} Current time: {current_time}
IMPORTANT: When you don't have a tool for the task, ALWAYS try search_extension first before saying you can't do it.
Examples:
- User asks about GitHub repo → search_extension({{"query": "github documentation"}})
- User needs web data → search_extension({{"query": "web scraping"}})
- User needs API → search_extension({{"query": "api client"}})"""
prefill_next_input = "" # Store prefill text for next input
while True:
try:
print(f"{DIM}{'─'*80}{RESET}")
user_input, images = read_multiline_input(prefill_next_input)
prefill_next_input = "" # Clear after use
print(f"{DIM}{'─'*80}{RESET}")
if not user_input and not images: continue
if user_input in ("/q", "exit"):
session_manager.save_session()
break
# Handle /clear command first (before /c to avoid conflict)
if user_input == "/clear":
# Save current session
session_manager.save_session()
# Get latest checkpoint from current session (if any)
checkpoints = session_manager.checkpoint_manager.list_checkpoints(show_all=False)
parent_checkpoint = checkpoints[0][0] if checkpoints else None
parent_session = session_manager.current_session.session_id
# Create new session branched from current
session_manager.create_session(
parent_checkpoint=parent_checkpoint,
parent_session=parent_session
)
# Reset state
files_modified.clear()
print(f"{GREEN}✓ Started new session: {session_manager.current_session.session_id}{RESET}")
if parent_checkpoint:
print(f"{DIM} └─ Branched from {parent_session[:8]}... @ {parent_checkpoint}{RESET}")
continue
# Handle turns command
if user_input.startswith("/t") or user_input.startswith("/turns"):
parts = user_input.split()
# Parse turn number if provided
turn_number = None
if len(parts) >= 2 and parts[1].isdigit():
turn_number = int(parts[1])
success, prefill_input = handle_turns_command(session_manager, turn_number)
if success:
# Session already modified in handle_turns_command, just save
session_manager.save_session()
# Set prefill for next input if provided
if prefill_input:
prefill_next_input = prefill_input
continue
# Handle checkpoint commands
if user_input.startswith("/checkpoint") or user_input.startswith("/c") or user_input == "/ca":
parts = user_input.split()
# /ca is shortcut for /c all
if parts[0] == "/ca":
parts = ["/c", "all"]
# /c without args defaults to list
if len(parts) == 1 and parts[0] in ["/c", "/checkpoint"]:
parts.append("list")
restored_messages = handle_checkpoint_command(parts, session_manager, files_modified)
if restored_messages is not None:
# Restore conversation by replacing session messages
session_manager.current_session.messages = restored_messages
session_manager.save_session()
continue
# Build message content
if images:
# Has images: use content array format
content = []
if user_input:
content.append({"type": "text", "text": user_input})
for img_block in images:
# Remove metadata (API doesn't need it)
img_block_clean = {
"type": "image",
"source": img_block["source"]
}
content.append(img_block_clean)
message = {"role": "user", "content": content}
# Show image info
print(f"{GREEN}📷 Attached {len(images)} image(s){RESET}")
else:
# Text only: keep original format
message = {"role": "user", "content": user_input}
# Add user message to current session
session_manager.current_session.messages.append(message)
# Reset stop flag for new turn
stop_flag = False
# Track files modified in this turn
files_modified_this_turn = set()
while True:
response = call_api(session_manager.current_session.messages, system_prompt)
blocks = process_stream(response)
if stop_flag: break
tool_results = []
for block in blocks:
if block["type"] == "tool_use":
name, args = block["name"], block["input"]
# Save baseline BEFORE executing write/edit
if name in ['write', 'edit']:
filepath = args.get('path')
if filepath and is_file_in_project(filepath, session_manager.project_path):
session_manager.save_baseline_if_needed(filepath)
# Format preview based on tool type
preview = format_tool_preview(name, args)
print(f"\n{GREEN}⏺ {name}{RESET}({DIM}{preview}{RESET})")
result = run_tool(name, args)
# Format result based on tool type
result_preview = format_tool_result(name, result)
print(f" {DIM}⎿ {result_preview}{RESET}")
# Track file modifications (only project files)
if name in ['write', 'edit']:
filepath = args.get('path')
if filepath and is_file_in_project(filepath, session_manager.project_path):
files_modified.add(filepath)
files_modified_this_turn.add(filepath)
session_manager.current_session.track_file_state(filepath)
tool_results.append({"type": "tool_result", "tool_use_id": block["id"], "content": result})
# Check stop_flag after each tool execution
if stop_flag:
print(f"{YELLOW}⚠ Tool execution stopped{RESET}")
break
session_manager.current_session.messages.append({"role": "assistant", "content": blocks})
if not tool_results or stop_flag: break
session_manager.current_session.messages.append({"role": "user", "content": tool_results})
# Auto checkpoint after AI work (if project files were modified)
checkpoint_id = None
if auto_checkpoint and files_modified_this_turn:
# files_modified_this_turn already filtered to project files only
# Use parent_commit for first checkpoint of new session
parent_commit = session_manager.parent_commit_for_next_checkpoint
checkpoint_id = session_manager.checkpoint_manager.create_checkpoint(
f"Auto: {user_input[:50]}",
list(files_modified_this_turn),
conversation_snapshot=session_manager.current_session.messages.copy(),
parent_commit=parent_commit
)
# Clear parent after first checkpoint
if parent_commit:
session_manager.parent_commit_for_next_checkpoint = None
if checkpoint_id:
# Generate summary using LLM with actual diff
print(f"{DIM}Generating checkpoint summary...{RESET}", end="", flush=True)
summary = summarize_changes(
user_input,
files_modified_this_turn,
session_manager.checkpoint_manager,
checkpoint_id
)
print(f"\r{' ' * 40}\r", end="", flush=True) # Clear the line
# Update commit message with better summary (only if different from temp message)
temp_message = f"Auto: {user_input[:50]}"
if summary != user_input[:50] and summary != temp_message:
session_manager.checkpoint_manager._git_command(
"--git-dir", session_manager.checkpoint_manager.bare_repo,
"commit", "--amend", "-m", summary
)
print(f"\n{YELLOW}📍 {checkpoint_id}: {summary}{RESET}")
else:
# Checkpoint creation failed (e.g., no actual diff)
print(f"\n{DIM}(No project file changes to checkpoint){RESET}")
# Record this turn
session_manager.current_session.add_turn(
user_input,
files_modified_this_turn,
checkpoint_id=checkpoint_id
)
# Auto-save session after each interaction
session_manager.save_session()
print()
except EOFError:
session_manager.save_session()
break
except Exception as e: print(f"{RED}⏺ Error: {e}{RESET}")
# ============================================================================
# Checkpoint & Session Management (Phase 1+2)
# ============================================================================
class CheckpointManager:
"""Manage checkpoints using shadow bare git repository with session isolation"""
def __init__(self, project_path, session_id=None):
self.project_path = project_path
self.session_id = session_id
self.nanocode_dir = os.path.join(project_path, ".nanocode")
self.bare_repo = os.path.join(self.nanocode_dir, "checkpoint.git")
self._init_bare_repo()
def set_session(self, session_id):
"""Set current session for checkpoint operations"""
self.session_id = session_id
def _get_branch_name(self):
"""Get git branch name for current session"""
if not self.session_id:
return "main"
return f"session_{self.session_id}"
def _init_bare_repo(self):
"""Initialize shadow bare repository"""
if not os.path.exists(self.bare_repo):
os.makedirs(self.bare_repo, exist_ok=True)
try:
subprocess.run(
["git", "init", "--bare", self.bare_repo],
capture_output=True, check=True
)
except (subprocess.CalledProcessError, FileNotFoundError):
# Git not available, will handle gracefully
pass
def _git_command(self, *args, cwd=None):
"""Execute git command"""
try:
result = subprocess.run(
["git"] + list(args),
cwd=cwd or self.project_path,
capture_output=True,
text=True,
check=True
)
return result.stdout.strip()
except (subprocess.CalledProcessError, FileNotFoundError) as e:
return f"error: {e}"
def save_file_to_blob(self, filepath):
"""Save file to git blob storage
Returns:
str: blob hash
"""
try:
result = subprocess.run(
["git", "--git-dir", self.bare_repo, "hash-object", "-w", filepath],
capture_output=True, text=True, check=True
)
return result.stdout.strip()
except Exception as e:
return None
def restore_file_from_blob(self, blob_hash, filepath):
"""Restore file from git blob storage"""
try:
content = subprocess.run(
["git", "--git-dir", self.bare_repo, "cat-file", "-p", blob_hash],
capture_output=True, check=True
).stdout
os.makedirs(os.path.dirname(filepath) or ".", exist_ok=True)
with open(filepath, 'wb') as f:
f.write(content)
return True
except Exception as e:
return False
def get_file_git_info(self, filepath):
"""Get file's git info from project .git
Returns:
dict: {"commit": "abc123", "has_changes": True/False} or None
"""
try:
# Check if file is tracked
result = subprocess.run(
["git", "ls-files", "--error-unmatch", filepath],
cwd=self.project_path,
capture_output=True, text=True
)
if result.returncode != 0:
return None # Not tracked
# Get last commit for this file
commit = subprocess.run(
["git", "log", "-1", "--format=%H", "--", filepath],
cwd=self.project_path,
capture_output=True, text=True, check=True
).stdout.strip()
# Check if file has local changes
diff = subprocess.run(
["git", "diff", "HEAD", "--", filepath],
cwd=self.project_path,
capture_output=True, text=True, check=True
).stdout.strip()
return {
"commit": commit,
"has_changes": bool(diff)
}
except Exception as e:
return None
def create_checkpoint(self, message, files_changed, conversation_snapshot=None, parent_commit=None):
"""Create a checkpoint on current session's branch
Args:
message: Commit message
files_changed: List of modified files
conversation_snapshot: Conversation state to save
parent_commit: Parent commit hash to branch from (for new sessions)
"""
print(f"{DIM}[LOG] create_checkpoint: files_changed={files_changed}{RESET}", flush=True)
if not files_changed or not self.session_id:
return None
branch_name = self._get_branch_name()
# Save conversation snapshot
if conversation_snapshot:
snapshot_file = os.path.join(self.nanocode_dir, "conversation_snapshots.json")
snapshots = {}
if os.path.exists(snapshot_file):
with open(snapshot_file, 'r') as f:
snapshots = json.load(f)
# Create temp worktree for this session
temp_worktree = os.path.join(self.nanocode_dir, f"temp_worktree_{self.session_id}")
try:
# Check if branch exists
branch_exists = self._git_command("--git-dir", self.bare_repo, "rev-parse", "--verify", branch_name)
if not branch_exists or branch_exists.startswith("error"):
# Create new branch
os.makedirs(temp_worktree, exist_ok=True)
self._git_command("--git-dir", self.bare_repo, "--work-tree", temp_worktree, "config", "core.bare", "false")
# If parent_commit specified, branch from it
if parent_commit:
# Create branch from parent commit
self._git_command("--git-dir", self.bare_repo, "branch", branch_name, parent_commit)
self._git_command("--git-dir", self.bare_repo, "--work-tree", temp_worktree, "checkout", branch_name, "-f")
else:
# Create orphan branch (no parent)
self._git_command("--git-dir", self.bare_repo, "--work-tree", temp_worktree, "checkout", "--orphan", branch_name)
# Copy files to temp worktree
for filepath in files_changed:
print(f"{DIM}[LOG] checkpoint copying: {filepath}{RESET}", flush=True)
if os.path.exists(filepath):
file_size = os.path.getsize(filepath)
print(f"{DIM}[LOG] source file exists: {filepath} ({file_size} bytes){RESET}", flush=True)
# Convert absolute path to relative path
if os.path.isabs(filepath):
rel_filepath = os.path.relpath(filepath, self.project_path)
else:
rel_filepath = filepath
dest = os.path.join(temp_worktree, rel_filepath)
os.makedirs(os.path.dirname(dest), exist_ok=True)
with open(filepath, 'rb') as src, open(dest, 'wb') as dst:
content = src.read()
dst.write(content)
print(f"{DIM}[LOG] copied to temp_worktree: {dest} ({len(content)} bytes){RESET}", flush=True)
else:
print(f"{DIM}[LOG] source file NOT exists: {filepath}{RESET}", flush=True)
# Commit
self._git_command("--git-dir", self.bare_repo, "--work-tree", temp_worktree, "add", "-A")
self._git_command("--git-dir", self.bare_repo, "--work-tree", temp_worktree,
"commit", "-m", message, "--allow-empty")
commit_hash = self._git_command("--git-dir", self.bare_repo, "rev-parse", "HEAD")
checkpoint_id = commit_hash[:8] if commit_hash and not commit_hash.startswith("error") else None
# Save conversation snapshot with checkpoint_id
if checkpoint_id and conversation_snapshot:
snapshots[checkpoint_id] = conversation_snapshot
with open(snapshot_file, 'w') as f:
json.dump(snapshots, f, indent=2)
return checkpoint_id
else:
# Branch exists, checkout and commit
self._git_command("--git-dir", self.bare_repo, "--work-tree", temp_worktree, "checkout", branch_name, "-f")
# Update temp worktree
for filepath in files_changed:
print(f"{DIM}[LOG] checkpoint updating: {filepath}{RESET}", flush=True)
if os.path.exists(filepath):
file_size = os.path.getsize(filepath)
print(f"{DIM}[LOG] source file exists: {filepath} ({file_size} bytes){RESET}", flush=True)
# Convert absolute path to relative path
if os.path.isabs(filepath):
rel_filepath = os.path.relpath(filepath, self.project_path)
else:
rel_filepath = filepath
dest = os.path.join(temp_worktree, rel_filepath)
os.makedirs(os.path.dirname(dest), exist_ok=True)
with open(filepath, 'rb') as src, open(dest, 'wb') as dst:
content = src.read()
dst.write(content)
print(f"{DIM}[LOG] copied to temp_worktree: {dest} ({len(content)} bytes){RESET}", flush=True)
else:
print(f"{DIM}[LOG] source file NOT exists: {filepath}{RESET}", flush=True)
self._git_command("--git-dir", self.bare_repo, "--work-tree", temp_worktree, "add", "-A")
self._git_command("--git-dir", self.bare_repo, "--work-tree", temp_worktree,
"commit", "-m", message, "--allow-empty")
commit_hash = self._git_command("--git-dir", self.bare_repo, "rev-parse", "HEAD")
checkpoint_id = commit_hash[:8] if commit_hash and not commit_hash.startswith("error") else None
# Save conversation snapshot with checkpoint_id
if checkpoint_id and conversation_snapshot:
snapshots[checkpoint_id] = conversation_snapshot
with open(snapshot_file, 'w') as f:
json.dump(snapshots, f, indent=2)
return checkpoint_id
except Exception as e:
return None
def list_checkpoints(self, limit=10, show_all=False):
"""List recent checkpoints for current session
Args:
limit: Maximum number of checkpoints to show
show_all: If True, show all sessions; if False, only show current session
"""
if not self.session_id and not show_all:
return []
try:
if show_all:
# Show all branches
args = ["--git-dir", self.bare_repo, "log", f"--max-count={limit}", "--oneline", "--all"]
else:
# Show only current session's branch
branch_name = self._get_branch_name()
args = ["--git-dir", self.bare_repo, "log", f"--max-count={limit}", "--oneline", branch_name]
log = self._git_command(*args)
if log and not log.startswith("error"):
return [line.split(" ", 1) for line in log.split("\n") if line]
return []
except:
return []
def restore_checkpoint(self, checkpoint_id, session_baseline_files):
"""Restore files to checkpoint state and reset current session's branch
This properly handles files that were added after the checkpoint by:
1. Restoring files that exist in checkpoint
2. Restoring files to baseline if they don't exist in checkpoint
Args:
checkpoint_id: Checkpoint hash to restore to
session_baseline_files: Dict of baseline file states from session
Returns:
tuple: (success: bool, conversation_snapshot: dict or None)
"""
if not self.session_id:
return False, None
branch_name = self._get_branch_name()
temp_worktree = os.path.join(self.nanocode_dir, f"temp_worktree_{self.session_id}")
try:
# Checkout branch first
self._git_command("--git-dir", self.bare_repo, "--work-tree", temp_worktree, "checkout", branch_name, "-f")
# Reset branch to checkpoint (discards future commits on this branch)
self._git_command("--git-dir", self.bare_repo, "reset", "--hard", checkpoint_id)
# Checkout to temp worktree
self._git_command("--git-dir", self.bare_repo, "--work-tree", temp_worktree,
"checkout", checkpoint_id, "-f")
# Get list of files in checkpoint
files_in_checkpoint_str = self._git_command(
"--git-dir", self.bare_repo,
"ls-tree", "-r", "--name-only", checkpoint_id
)
files_in_checkpoint = set()
if files_in_checkpoint_str and not files_in_checkpoint_str.startswith("error"):
files_in_checkpoint = set(f for f in files_in_checkpoint_str.split('\n') if f.strip())
print(f"\n{DIM}Files in checkpoint: {len(files_in_checkpoint)}{RESET}")
print(f"{DIM}Files modified in session: {len(session_baseline_files)}{RESET}\n")
# Process each file that was modified in this session
for filepath, baseline_source in session_baseline_files.items():
# Convert to relative path for comparison
if os.path.isabs(filepath):
rel_filepath = os.path.relpath(filepath, self.project_path)
else:
rel_filepath = filepath
# Normalize path: remove leading ./
normalized_rel_path = rel_filepath.lstrip('./')
if normalized_rel_path in files_in_checkpoint:
# File exists in checkpoint - restore from checkpoint
src = os.path.join(temp_worktree, normalized_rel_path)
dest = os.path.join(self.project_path, normalized_rel_path)
dest_dir = os.path.dirname(dest)
if dest_dir:
os.makedirs(dest_dir, exist_ok=True)
with open(src, 'rb') as s, open(dest, 'wb') as d:
d.write(s.read())
print(f" {GREEN}✓{RESET} {filepath} {DIM}(from checkpoint){RESET}")
else:
# File doesn't exist in checkpoint - restore to baseline
abs_filepath = filepath if os.path.isabs(filepath) else os.path.join(self.project_path, filepath)
if baseline_source["type"] == "git":
# Restore from project .git (use normalized path for git)
result = subprocess.run(
["git", "checkout", baseline_source["commit"], "--", normalized_rel_path],
cwd=self.project_path,
capture_output=True, text=True
)
if result.returncode == 0:
print(f" {CYAN}↺{RESET} {filepath} {DIM}(to baseline: git {baseline_source['commit'][:8]}){RESET}")
elif baseline_source["type"] == "blob":
# Restore from blob
if self.restore_file_from_blob(baseline_source["hash"], abs_filepath):
print(f" {CYAN}↺{RESET} {filepath} {DIM}(to baseline: blob {baseline_source['hash'][:8]}){RESET}")
elif baseline_source["type"] == "new":
# Delete new file
if os.path.exists(abs_filepath):
os.remove(abs_filepath)
print(f" {YELLOW}✗{RESET} {filepath} {DIM}(deleted: was added after checkpoint){RESET}")
# Load conversation snapshot
snapshot_file = os.path.join(self.nanocode_dir, "conversation_snapshots.json")
conversation_snapshot = None
if os.path.exists(snapshot_file):
with open(snapshot_file, 'r') as f:
snapshots = json.load(f)
conversation_snapshot = snapshots.get(checkpoint_id)
return True, conversation_snapshot
except Exception as e:
print(f"{RED}Error during restore: {e}{RESET}")
return False, None
class Session:
"""Represents a conversation session"""
def __init__(self, session_id=None):
self.session_id = session_id or self._generate_session_id()
self.messages = []
self.file_states = {}
self.baseline_files = {} # Track original file versions for rollback
self.turns = [] # Track conversation turns
self.metadata = {
'created_at': time.time(),
'last_active': time.time(),
'description': '',
'cwd': os.getcwd(),
'parent_checkpoint': None, # Track where this session branched from
'parent_session': None, # Track which session it branched from
'git_commit': None, # Project .git commit hash when session started
'git_branch': None, # Project .git branch when session started
'git_dirty': False, # Whether project had uncommitted changes
}
def _generate_session_id(self):
"""Generate unique session ID"""
timestamp = datetime.now().strftime('%Y%m%d_%H%M%S')
random_suffix = ''.join(random.choices('0123456789abcdef', k=4))
return f"{timestamp}_{random_suffix}"
def _get_project_git_info(self):
"""Get current project git state"""
try:
cwd = self.metadata.get('cwd', os.getcwd())
# Get current commit
commit = subprocess.run(
["git", "rev-parse", "HEAD"],
cwd=cwd,
capture_output=True, text=True, check=True
).stdout.strip()
# Get current branch
branch = subprocess.run(
["git", "rev-parse", "--abbrev-ref", "HEAD"],
cwd=cwd,
capture_output=True, text=True, check=True
).stdout.strip()
# Check if dirty
status = subprocess.run(
["git", "status", "--porcelain"],
cwd=cwd,
capture_output=True, text=True, check=True
).stdout.strip()
return {
'git_commit': commit[:8],
'git_branch': branch,
'git_dirty': bool(status)
}
except:
return None
def capture_git_state(self):
"""Capture current project git state into metadata"""
git_info = self._get_project_git_info()
if git_info:
self.metadata.update(git_info)
def track_file_state(self, filepath):
"""Track file state for conflict detection"""
if os.path.exists(filepath):
with open(filepath, 'rb') as f:
content = f.read()
file_hash = hashlib.md5(content).hexdigest()
self.file_states[filepath] = {
'hash': file_hash,
'mtime': os.path.getmtime(filepath),
'size': len(content)
}
def detect_conflicts(self):
"""Detect if tracked files have been modified outside this session
Returns:
list: List of conflicted file paths
"""
conflicts = []
for filepath, saved_state in self.file_states.items():
if os.path.exists(filepath):
with open(filepath, 'rb') as f:
content = f.read()
current_hash = hashlib.md5(content).hexdigest()
current_mtime = os.path.getmtime(filepath)
# Check if file has changed
if (current_hash != saved_state['hash'] or
current_mtime != saved_state['mtime']):
conflicts.append(filepath)
else:
# File was deleted
conflicts.append(f"{filepath} (deleted)")
return conflicts
def update_file_states(self):
"""Update all tracked file states to current state"""
for filepath in list(self.file_states.keys()):
if os.path.exists(filepath):
self.track_file_state(filepath)
else:
# Remove deleted files from tracking
del self.file_states[filepath]
def add_turn(self, user_input, files_modified, checkpoint_id=None):
"""Record a conversation turn
Args:
user_input: User's input for this turn
files_modified: Set of files modified in this turn
checkpoint_id: Associated checkpoint ID if files were modified
"""
turn_number = len(self.turns) + 1
turn_data = {
'turn_number': turn_number,
'timestamp': time.time(),
'user_input': user_input[:100], # Truncate for preview
'files_modified': list(files_modified),
'checkpoint_id': checkpoint_id,
'message_count': len(self.messages) # Track message index
}
self.turns.append(turn_data)
return turn_number
def to_dict(self):
"""Serialize to dict"""
return {
'session_id': self.session_id,
'messages': self.messages,
'file_states': self.file_states,
'baseline_files': self.baseline_files,
'turns': self.turns,
'metadata': self.metadata
}
@staticmethod
def from_dict(data):
"""Deserialize from dict"""
session = Session(session_id=data['session_id'])
session.messages = data.get('messages', [])
session.file_states = data.get('file_states', {})
session.baseline_files = data.get('baseline_files', {})
session.turns = data.get('turns', [])
session.metadata = data.get('metadata', {})
return session
class SessionManager:
"""Manage multiple sessions"""
def __init__(self, project_path):
self.project_path = project_path
self.sessions_dir = os.path.join(project_path, ".nanocode", "sessions")
self.current_session = None
self.checkpoint_manager = CheckpointManager(project_path)
self.parent_commit_for_next_checkpoint = None # Track parent for first checkpoint
os.makedirs(self.sessions_dir, exist_ok=True)
def save_baseline_if_needed(self, filepath):
"""Save file's baseline version before first modification
This is called before write/edit operations to preserve the original state.
"""
if not self.current_session:
return
# Already saved
if filepath in self.current_session.baseline_files:
return
print(f"{DIM}[LOG] Saving baseline for: {filepath}{RESET}", flush=True)
# Get file info from project .git
git_info = self.checkpoint_manager.get_file_git_info(filepath)
if git_info:
# File is tracked by project .git
if git_info["has_changes"]:
# Has local changes - save to blob
blob_hash = self.checkpoint_manager.save_file_to_blob(filepath)
if blob_hash:
self.current_session.baseline_files[filepath] = {
"type": "blob",
"hash": blob_hash
}
print(f"{DIM}[LOG] Saved dirty file to blob: {blob_hash[:8]}{RESET}", flush=True)
else:
# Clean - just record commit
self.current_session.baseline_files[filepath] = {
"type": "git",
"commit": git_info["commit"]
}
print(f"{DIM}[LOG] Recorded git commit: {git_info['commit'][:8]}{RESET}", flush=True)
else:
# Untracked file or no .git
if os.path.exists(filepath):
# Save existing untracked file to blob
blob_hash = self.checkpoint_manager.save_file_to_blob(filepath)
if blob_hash:
self.current_session.baseline_files[filepath] = {
"type": "blob",
"hash": blob_hash
}
print(f"{DIM}[LOG] Saved untracked file to blob: {blob_hash[:8]}{RESET}", flush=True)
else:
# New file - mark as new
self.current_session.baseline_files[filepath] = {
"type": "new"
}
print(f"{DIM}[LOG] Marked as new file{RESET}", flush=True)
# Auto-save session to persist baseline_files
self.save_session()
def restore_baseline(self):
"""Restore all files to their baseline state
Returns:
bool: Success status
"""
if not self.current_session:
return False
if not self.current_session.baseline_files:
# No files modified = already at baseline state = success
print(f"{DIM}No files to restore (already at baseline){RESET}")
return True
print(f"\n{BOLD}Restoring {len(self.current_session.baseline_files)} files to baseline...{RESET}\n")
success_count = 0
for filepath, source in self.current_session.baseline_files.items():
try:
# Normalize to absolute path
abs_filepath = filepath if os.path.isabs(filepath) else os.path.join(self.project_path, filepath)
# Get relative path for git operations
rel_filepath = os.path.relpath(abs_filepath, self.project_path)
if source["type"] == "git":
# Restore from project .git (use relative path)
result = subprocess.run(
["git", "checkout", source["commit"], "--", rel_filepath],
cwd=self.project_path,
capture_output=True, text=True
)
if result.returncode == 0:
print(f" {GREEN}✓{RESET} {filepath} {DIM}(from git {source['commit'][:8]}){RESET}")
success_count += 1
else:
print(f" {RED}✗{RESET} {filepath} {DIM}(git checkout failed){RESET}")
elif source["type"] == "blob":
# Restore from checkpoint.git blob (use absolute path)
if self.checkpoint_manager.restore_file_from_blob(source["hash"], abs_filepath):
print(f" {GREEN}✓{RESET} {filepath} {DIM}(from blob {source['hash'][:8]}){RESET}")
success_count += 1
else:
print(f" {RED}✗{RESET} {filepath} {DIM}(blob restore failed){RESET}")
elif source["type"] == "new":
# Delete new file (use absolute path)
if os.path.exists(abs_filepath):
os.remove(abs_filepath)
print(f" {GREEN}✓{RESET} {filepath} {DIM}(deleted new file){RESET}")
success_count += 1
else:
print(f" {DIM}○{RESET} {filepath} {DIM}(already deleted){RESET}")
success_count += 1
except Exception as e:
print(f" {RED}✗{RESET} {filepath} {DIM}(error: {e}){RESET}")
print(f"\n{GREEN}✓ Restored {success_count}/{len(self.current_session.baseline_files)} files{RESET}")
return success_count > 0
def create_session(self, description="", parent_checkpoint=None, parent_session=None):
"""Create new session
Args:
description: Session description
parent_checkpoint: Checkpoint ID this session branches from
parent_session: Session ID this session branches from
"""
session = Session()
session.metadata['description'] = description
session.metadata['parent_checkpoint'] = parent_checkpoint
session.metadata['parent_session'] = parent_session
# Capture project git state
session.capture_git_state()
self.current_session = session
# Set checkpoint manager to use this session
self.checkpoint_manager.set_session(session.session_id)
# Store parent commit for first checkpoint
self.parent_commit_for_next_checkpoint = parent_checkpoint
self.save_session()
return session
def save_session(self):
"""Save current session to disk"""
if not self.current_session:
return
self.current_session.metadata['last_active'] = time.time()
session_file = os.path.join(
self.sessions_dir,
f"{self.current_session.session_id}.json"
)
with open(session_file, 'w') as f:
json.dump(self.current_session.to_dict(), f, indent=2)
def load_session(self, session_id):
"""Load session from disk"""
session_file = os.path.join(self.sessions_dir, f"{session_id}.json")
if not os.path.exists(session_file):
return None
with open(session_file, 'r') as f:
data = json.load(f)
session = Session.from_dict(data)
self.current_session = session
# Set checkpoint manager to use this session
self.checkpoint_manager.set_session(session.session_id)
return session
def list_sessions(self):
"""List all sessions"""
sessions = []
if not os.path.exists(self.sessions_dir):
return sessions
for filename in os.listdir(self.sessions_dir):
if filename.endswith('.json'):
filepath = os.path.join(self.sessions_dir, filename)
try:
with open(filepath, 'r') as f:
data = json.load(f)
sessions.append({
'session_id': data['session_id'],
'metadata': data['metadata'],
'message_count': len(data.get('messages', [])),
})
except:
pass
return sorted(sessions, key=lambda x: x['metadata'].get('last_active', 0), reverse=True)
def load_last_session(self):
"""Load the most recent session"""
sessions = self.list_sessions()
if sessions:
return self.load_session(sessions[0]['session_id'])
return None
def handle_turns_command(session_manager, turn_number=None):
"""Handle /t or /turns command to display or restore conversation turns
Args:
session_manager: SessionManager instance
turn_number: If provided, restore to this turn; otherwise list turns
Returns:
tuple: (success: bool, prefill_input: str or None)
"""
if not session_manager.current_session:
print(f"{YELLOW}⚠ No active session{RESET}")
return False, None
turns = session_manager.current_session.turns
if not turns:
print(f"{DIM}No conversation turns yet{RESET}")
return False, None
# If turn_number provided, restore to that turn
if turn_number is not None:
return restore_to_turn(session_manager, turn_number)
# Otherwise, list all turns
print(f"\n{BOLD}💬 Conversation Turns:{RESET}\n")
for turn in turns:
turn_num = turn['turn_number']
timestamp = turn['timestamp']
user_input = turn['user_input']
files_modified = turn.get('files_modified', [])
checkpoint_id = turn.get('checkpoint_id')
# Calculate time ago
time_ago = time.time() - timestamp
if time_ago < 60:
time_str = f"{int(time_ago)}s ago"
elif time_ago < 3600:
time_str = f"{int(time_ago/60)}m ago"
elif time_ago < 86400:
time_str = f"{int(time_ago/3600)}h ago"
else:
time_str = f"{int(time_ago/86400)}d ago"
# Format turn line
checkpoint_marker = f" {YELLOW}[{checkpoint_id}]{RESET}" if checkpoint_id else ""
files_marker = f" {GREEN}✓{RESET}" if files_modified else ""
print(f" {CYAN}turn_{turn_num}{RESET}{checkpoint_marker}{files_marker} {DIM}({time_str}){RESET}")
print(f" {DIM}└─{RESET} {user_input}")
if files_modified:
files_display = ", ".join(files_modified[:3])
if len(files_modified) > 3:
files_display += f" +{len(files_modified)-3} more"
print(f" {DIM}Files: {files_display}{RESET}")
print()
print(f"{DIM}Tip: Use '/t ' to undo that turn and restart from previous{RESET}")
return False, None # Return False to indicate no restore action
def restore_to_turn(session_manager, turn_number):
"""Restore files and conversation to a specific turn
Args:
session_manager: SessionManager instance
turn_number: Turn number to undo (1-indexed, will restore to turn_number-1)
Returns:
tuple: (success: bool, prefill_input: str or None)
"""
turns = session_manager.current_session.turns
# User wants to undo turn_N, so restore to turn_(N-1)
# Special case: /t 1 means clear all turns
if turn_number == 1:
print(f"{YELLOW}⚠ This will undo turn_1 and reset to session start{RESET}")
confirm = input(f"\n{BOLD}Continue? (y/N): {RESET}").strip().lower()
if confirm != 'y':
print(f"{DIM}Cancelled{RESET}")
return False, None
# Restore to baseline
success = session_manager.restore_baseline()
if not success:
return False, None
# Clear all turns and messages
session_manager.current_session.turns = []
session_manager.current_session.messages = []
session_manager.current_session.update_file_states()
session_manager.parent_commit_for_next_checkpoint = None
print(f"{GREEN}✓ Reset to session start{RESET}")
# Return original turn_1 input for prefill
original_input = turns[0]['user_input'] if turns else None
return True, original_input
# Normal case: restore to turn_(N-1)
restore_to = turn_number - 1
# Validate
if restore_to < 1 or restore_to > len(turns):
print(f"{RED}Invalid turn number. Valid range: 1-{len(turns)}{RESET}")
return False, None
turn = turns[restore_to - 1]
# Find the most recent checkpoint at or before restore_to
checkpoint_id = None
checkpoint_turn = None
for i in range(restore_to - 1, -1, -1):
if turns[i].get('checkpoint_id'):
checkpoint_id = turns[i]['checkpoint_id']
checkpoint_turn = i + 1
break
# Get original input from the turn being undone
# Note: turn['user_input'] is truncated to 100 chars, so get full input from messages
original_input = None
if turn_number <= len(turns):
turn_to_undo = turns[turn_number - 1]
# Find the user message for this turn
# turn_to_undo['message_count'] is the total messages after this turn
# The user message for this turn is at index (message_count - 2) if there's an assistant response
# or (message_count - 1) if it's the last message
msg_idx = turn_to_undo['message_count'] - 2 # Assume there's an assistant response
if msg_idx >= 0 and msg_idx < len(session_manager.current_session.messages):
msg = session_manager.current_session.messages[msg_idx]
if msg['role'] == 'user' and isinstance(msg['content'], str):
original_input = msg['content']
# Show warning
future_turns = len(turns) - restore_to
print(f"\n{YELLOW}⚠ This will undo turn_{turn_number} (restore to turn_{restore_to}){RESET}")
if checkpoint_id:
if checkpoint_turn == restore_to:
print(f"{YELLOW}⚠ Files: restored to turn_{restore_to} checkpoint ({checkpoint_id}){RESET}")
else:
print(f"{YELLOW}⚠ Files: restored to turn_{checkpoint_turn} checkpoint ({checkpoint_id}){RESET}")
else:
print(f"{YELLOW}⚠ Files: restored to baseline (no checkpoints before turn_{restore_to}){RESET}")
print(f"{YELLOW}⚠ Conversation: restored to turn_{restore_to} ({turn['message_count']} messages){RESET}")
if future_turns > 0:
print(f"{YELLOW}⚠ Future turns ({restore_to + 1}-{len(turns)}) will be discarded{RESET}")
if original_input:
print(f"\n{CYAN}Original turn_{turn_number} input will be prefilled:{RESET}")
print(f" {DIM}{original_input[:100]}{'...' if len(original_input) > 100 else ''}{RESET}")
confirm = input(f"\n{BOLD}Continue? (y/N): {RESET}").strip().lower()
if confirm != 'y':
print(f"{DIM}Cancelled{RESET}")
return False, None
# Restore files
if checkpoint_id:
success, _ = session_manager.checkpoint_manager.restore_checkpoint(
checkpoint_id,
session_manager.current_session.baseline_files
)
if not success:
print(f"{RED}✗ Failed to restore files{RESET}")
return False, None
print(f"{GREEN}✓ Restored files to checkpoint {checkpoint_id}{RESET}")
else:
# No checkpoint before this turn, restore to baseline
success = session_manager.restore_baseline()
if not success:
print(f"{RED}✗ Failed to restore to baseline{RESET}")
return False, None
print(f"{GREEN}✓ Restored files to baseline{RESET}")
# Restore conversation by truncating messages (modify session directly)
session_manager.current_session.messages = session_manager.current_session.messages[:turn['message_count']]
# Truncate turns list to restore_to
session_manager.current_session.turns = turns[:restore_to]
# Update file states to match restored files
session_manager.current_session.update_file_states()
# Reset parent commit for next checkpoint
session_manager.parent_commit_for_next_checkpoint = checkpoint_id if checkpoint_id else None
print(f"{GREEN}✓ Restored to turn_{restore_to} ({len(session_manager.current_session.messages)} messages){RESET}")
return True, original_input # Return success and prefill input
def handle_checkpoint_command(parts, session_manager, files_modified):
"""Handle /checkpoint or /c commands
Returns:
messages: New messages list if conversation was restored, None otherwise
"""
# Default to list if no subcommand
if len(parts) < 2:
parts.append("list")
cmd = parts[1]
# If cmd looks like a commit hash (7-8 hex chars), treat as restore
if len(cmd) >= 7 and len(cmd) <= 8 and all(c in '0123456789abcdef' for c in cmd.lower()):
cmd = "restore"
checkpoint_id = parts[1]
else:
checkpoint_id = None
if cmd == "baseline" or cmd == "base":
# Restore all files to baseline (session start state)
if not session_manager.current_session.baseline_files:
print(f"{YELLOW}⚠ No baseline: no files have been modified in this session{RESET}")
return None
print(f"{YELLOW}⚠ This will restore all modified files to their original state{RESET}")
print(f"{YELLOW}⚠ Files to restore: {len(session_manager.current_session.baseline_files)}{RESET}")
# Show files
print(f"\n{DIM}Files:{RESET}")
for filepath in list(session_manager.current_session.baseline_files.keys())[:10]:
print(f" {DIM}• {filepath}{RESET}")
if len(session_manager.current_session.baseline_files) > 10:
print(f" {DIM}... and {len(session_manager.current_session.baseline_files) - 10} more{RESET}")
confirm = input(f"\n{BOLD}Continue? (y/N): {RESET}").strip().lower()
if confirm != 'y':
print(f"{DIM}Cancelled{RESET}")
return None
success = session_manager.restore_baseline()
if success:
# Clear conversation
print(f"{GREEN}✓ Conversation cleared{RESET}")
return []
else:
return None
elif cmd == "list" or cmd == "all" or cmd == "--all":
show_all = (cmd == "all" or "--all" in parts)
if show_all:
# Show git graph of all branches
print(f"\n{BOLD}📍 Checkpoint Graph:{RESET}\n")
# Use git log --graph --all to show the tree
# Format: %h = short hash, %d = ref names, %s = subject, %ar = relative date
graph_output = session_manager.checkpoint_manager._git_command(
"--git-dir", session_manager.checkpoint_manager.bare_repo,
"log", "--graph", "--all", "--oneline",
"--format=%h %s (%ar)", "-20"
)
if graph_output and not graph_output.startswith("error"):
# Also get branch info for each commit
branches_output = session_manager.checkpoint_manager._git_command(
"--git-dir", session_manager.checkpoint_manager.bare_repo,
"branch", "-a", "--contains"
)
# Parse and display
for line in graph_output.split('\n'):
if not line.strip():
continue
# Extract commit hash
match = re.search(r'\b([0-9a-f]{7,8})\b', line)
if match:
commit_hash = match.group(1)
# Get branches containing this commit
branch_info = session_manager.checkpoint_manager._git_command(
"--git-dir", session_manager.checkpoint_manager.bare_repo,
"branch", "-a", "--contains", commit_hash
)
# Extract session names from branches
session_names = []
if branch_info and not branch_info.startswith("error"):
for branch_line in branch_info.split('\n'):
branch_line = branch_line.strip().lstrip('* ')
if branch_line.startswith('session_'):
# Shorten session name: session_20260130_103323_f7 -> s:20260130_103323_f7
session_short = 's:' + branch_line[8:] # Remove 'session_' prefix
session_names.append(session_short)
# Highlight commit hash
line = line.replace(commit_hash, f"{CYAN}{commit_hash}{RESET}")
# Add session info if found
if session_names:
# Insert session names after commit hash
session_str = f"{GREEN}[{', '.join(session_names[:2])}]{RESET}"
line = line.replace(commit_hash + f"{RESET}", commit_hash + f"{RESET} {session_str}")
print(f" {line}")
print()
else:
print(f"{DIM}No checkpoints yet{RESET}\n")
print(f"{DIM}Restore: /c {RESET}")
return None
else:
# Show current session's checkpoints
checkpoints = session_manager.checkpoint_manager.list_checkpoints(show_all=False)
if not checkpoints:
print(f"{DIM}No checkpoints yet{RESET}")
return None
print(f"\n{BOLD}📍 Checkpoints:{RESET}\n")
# Get checkpoint details from git log with timestamp
for commit_hash, message in checkpoints[:10]: # Show first 10 (already newest first from git log)
# Try to get timestamp from git
timestamp_str = session_manager.checkpoint_manager._git_command(
"--git-dir", session_manager.checkpoint_manager.bare_repo,
"log", "-1", "--format=%ar", commit_hash
)
if timestamp_str.startswith("error"):
timestamp_str = ""
# Get modified files
files_str = session_manager.checkpoint_manager._git_command(
"--git-dir", session_manager.checkpoint_manager.bare_repo,
"diff-tree", "--no-commit-id", "--name-only", "-r", commit_hash
)
files = []
if files_str and not files_str.startswith("error"):
files = [f.strip() for f in files_str.split('\n') if f.strip()]
# Format: hash | time ago | message
time_part = f"{DIM}{timestamp_str}{RESET}" if timestamp_str else ""
print(f" {CYAN}{commit_hash}{RESET} {time_part}")
print(f" {DIM}└─{RESET} {message}")
if files:
files_display = ", ".join(files[:3])
if len(files) > 3:
files_display += f" +{len(files)-3} more"
print(f" {DIM} Files: {files_display}{RESET}")
print()
print(f"{DIM}Tip: Use '/c all' or '/ca' to see git graph{RESET}")
print(f"{DIM}Restore: /c {RESET}")
return None
elif cmd == "restore":
if not checkpoint_id:
print(f"{RED}Usage: /c {RESET}")
return None
print(f"{YELLOW}⚠ This will restore files AND conversation to checkpoint {checkpoint_id}{RESET}")
print(f"{YELLOW}⚠ Future checkpoints will be discarded from history{RESET}")
confirm = input(f"{BOLD}Continue? (y/N): {RESET}").strip().lower()
if confirm != 'y':
print(f"{DIM}Cancelled{RESET}")
return None
success, conversation_snapshot = session_manager.checkpoint_manager.restore_checkpoint(
checkpoint_id,
session_manager.current_session.baseline_files
)
if success:
print(f"{GREEN}✓ Restored files to checkpoint {checkpoint_id}{RESET}")
if conversation_snapshot:
print(f"{GREEN}✓ Restored conversation ({len(conversation_snapshot)} messages){RESET}")
return conversation_snapshot
else:
print(f"{YELLOW}⚠ No conversation snapshot found for this checkpoint{RESET}")
return None
else:
print(f"{RED}✗ Failed to restore checkpoint{RESET}")
return None
else:
print(f"{RED}Unknown command: {cmd}{RESET}")
return None
if __name__ == "__main__":
main()