feat(agent): implement Claude Code SDK agent with chat mode and persistent browser

Implementation:
- Singleton browser pattern (BrowserManager) - one instance for entire session
- 7 MCP tools for Crawl4AI (quick_crawl, sessions, navigation, extraction, JS execution, screenshots)
- Interactive chat mode with streaming I/O using Claude SDK message generator
- Rich-based terminal UI with markdown rendering and syntax highlighting
- Single-shot and chat modes (--chat flag)
- Comprehensive test suite: component tests, tool tests, 9 multi-turn scenarios

Architecture:
- agent_crawl.py: CLI entry point with SessionStorage (JSONL logging)
- browser_manager.py: Singleton pattern for persistent AsyncWebCrawler
- c4ai_tools.py: MCP tools using @tool decorator, integrated with BrowserManager
- chat_mode.py: Streaming input mode per Claude SDK spec
- terminal_ui.py: Rich-based beautiful terminal output
- test_scenarios.py: Automated multi-turn conversation tests (simple/medium/complex)
- TECH_SPEC.md: Complete AI-to-AI knowledge transfer document

Key fixes:
- Use result.markdown (not deprecated result.markdown_v2)
- Handle both str and MarkdownGenerationResult types
- Track current URL per session for extract_data/execute_js/screenshot tools
- Manual browser lifecycle (start/close) instead of context managers

Tools enabled:
- Crawl4AI: quick_crawl, start_session, navigate, extract_data, execute_js, screenshot, close_session
- Claude SDK built-in: Read, Write, Edit, Glob, Grep, Bash, NotebookEdit

Total: 12 files, 2820 lines

crawl4ai/agent/TECH_SPEC.md

@@ -0,0 +1,429 @@
+# Crawl4AI Agent Technical Specification
+*AI-to-AI Knowledge Transfer Document*
+
+## Context Documents
+**MUST READ FIRST:**
+1. `/Users/unclecode/devs/crawl4ai/tmp/CRAWL4AI_SDK.md` - Crawl4AI complete API reference
+2. `/Users/unclecode/devs/crawl4ai/tmp/cc_stream.md` - Claude SDK streaming input mode
+3. `/Users/unclecode/devs/crawl4ai/tmp/CC_PYTHON_SDK.md` - Claude Code Python SDK complete reference
+
+## Architecture Overview
+
+**Core Principle:** Singleton browser instance + streaming chat mode + MCP tools
+
+```
+┌─────────────────────────────────────────────────────────────┐
+│                    Agent Entry Point                         │
+│         agent_crawl.py (CLI: --chat | single-shot)          │
+└─────────────────────────────────────────────────────────────┘
+                            │
+        ┌───────────────────┼───────────────────┐
+        │                   │                   │
+   [Chat Mode]         [Single-shot]    [Browser Manager]
+        │                   │                   │
+        ▼                   ▼                   ▼
+  ChatMode.run()    CrawlAgent.run()   BrowserManager
+  - Streaming        - One prompt          (Singleton)
+  - Interactive      - Exit after           │
+  - Commands         - Uses same            ▼
+        │              browser         AsyncWebCrawler
+        │                   │             (persistent)
+        └───────────────────┴────────────────┘
+                            │
+                    ┌───────┴────────┐
+                    │                │
+              MCP Tools        Claude SDK
+            (Crawl4AI)        (Built-in)
+                    │                │
+        ┌───────────┴────┐    ┌──────┴──────┐
+        │                │    │             │
+   quick_crawl    session    Read        Edit
+   navigate       tools      Write       Glob
+   extract_data              Bash        Grep
+   execute_js
+   screenshot
+   close_session
+```
+
+## File Structure
+
+```
+crawl4ai/agent/
+├── __init__.py                 # Module exports
+├── agent_crawl.py              # Main CLI entry (190 lines)
+│   ├── SessionStorage          # JSONL logging to ~/.crawl4ai/agents/projects/
+│   ├── CrawlAgent             # Single-shot wrapper
+│   └── main()                 # CLI parser (--chat flag)
+│
+├── browser_manager.py          # Singleton pattern (70 lines)
+│   └── BrowserManager         # Class methods only, no instances
+│       ├── get_browser()      # Returns singleton AsyncWebCrawler
+│       ├── reconfigure_browser()
+│       ├── close_browser()
+│       └── is_browser_active()
+│
+├── c4ai_tools.py               # 7 MCP tools (310 lines)
+│   ├── @tool decorators       # Claude SDK decorator
+│   ├── CRAWLER_SESSIONS       # Dict[str, AsyncWebCrawler] for named sessions
+│   ├── CRAWLER_SESSION_URLS   # Dict[str, str] track current URL per session
+│   └── CRAWL_TOOLS            # List of tool functions
+│
+├── c4ai_prompts.py             # System prompt (130 lines)
+│   └── SYSTEM_PROMPT          # Agent behavior definition
+│
+├── terminal_ui.py              # Rich-based UI (120 lines)
+│   └── TerminalUI             # Console rendering
+│       ├── show_header()
+│       ├── print_markdown()
+│       ├── print_code()
+│       └── with_spinner()
+│
+├── chat_mode.py                # Streaming chat (160 lines)
+│   └── ChatMode
+│       ├── message_generator() # AsyncGenerator per cc_stream.md
+│       ├── _handle_command()   # /exit /clear /help /browser
+│       └── run()              # Main chat loop
+│
+├── test_tools.py               # Direct tool tests (130 lines)
+├── test_chat.py                # Component tests (90 lines)
+└── test_scenarios.py           # Multi-turn scenarios (500 lines)
+    ├── SIMPLE_SCENARIOS
+    ├── MEDIUM_SCENARIOS
+    ├── COMPLEX_SCENARIOS
+    └── ScenarioRunner
+```
+
+## Critical Implementation Details
+
+### 1. Browser Singleton Pattern
+
+**Key:** ONE browser instance for ENTIRE agent session
+
+```python
+# browser_manager.py
+class BrowserManager:
+    _crawler: Optional[AsyncWebCrawler] = None  # Singleton
+    _config: Optional[BrowserConfig] = None
+
+    @classmethod
+    async def get_browser(cls, config=None) -> AsyncWebCrawler:
+        if cls._crawler is None:
+            cls._crawler = AsyncWebCrawler(config or BrowserConfig())
+            await cls._crawler.start()  # Manual lifecycle
+        return cls._crawler
+```
+
+**Behavior:**
+- First call: creates browser with `config` (or default)
+- Subsequent calls: returns same instance, **ignores config param**
+- To change config: `reconfigure_browser(new_config)` (closes old, creates new)
+- Tools use: `crawler = await BrowserManager.get_browser()`
+- No `async with` context manager - manual `start()` / `close()`
+
+### 2. Tool Architecture
+
+**Two types of browser usage:**
+
+**A) Quick operations** (quick_crawl):
+```python
+@tool("quick_crawl", ...)
+async def quick_crawl(args):
+    crawler = await BrowserManager.get_browser()  # Singleton
+    result = await crawler.arun(url=args["url"], config=run_config)
+    # No close - browser stays alive
+```
+
+**B) Named sessions** (start_session, navigate, extract_data, etc.):
+```python
+CRAWLER_SESSIONS: Dict[str, AsyncWebCrawler] = {}  # Named refs
+CRAWLER_SESSION_URLS: Dict[str, str] = {}  # Track current URL
+
+@tool("start_session", ...)
+async def start_session(args):
+    crawler = await BrowserManager.get_browser()
+    CRAWLER_SESSIONS[args["session_id"]] = crawler  # Store ref
+
+@tool("navigate", ...)
+async def navigate(args):
+    crawler = CRAWLER_SESSIONS[args["session_id"]]
+    result = await crawler.arun(url=args["url"], ...)
+    CRAWLER_SESSION_URLS[args["session_id"]] = result.url  # Track URL
+
+@tool("extract_data", ...)
+async def extract_data(args):
+    crawler = CRAWLER_SESSIONS[args["session_id"]]
+    current_url = CRAWLER_SESSION_URLS[args["session_id"]]  # Must have URL
+    result = await crawler.arun(url=current_url, ...)  # Re-crawl current page
+
+@tool("close_session", ...)
+async def close_session(args):
+    CRAWLER_SESSIONS.pop(args["session_id"])  # Remove ref
+    CRAWLER_SESSION_URLS.pop(args["session_id"], None)
+    # Browser stays alive (singleton)
+```
+
+**Important:** Named sessions are just **references** to singleton browser. Multiple sessions = same browser instance.
+
+### 3. Markdown Handling (CRITICAL BUG FIX)
+
+**OLD (WRONG):**
+```python
+result.markdown_v2.raw_markdown  # DEPRECATED
+```
+
+**NEW (CORRECT):**
+```python
+# result.markdown can be:
+# - str (simple mode)
+# - MarkdownGenerationResult object (with filters)
+
+if isinstance(result.markdown, str):
+    markdown_content = result.markdown
+elif hasattr(result.markdown, 'raw_markdown'):
+    markdown_content = result.markdown.raw_markdown
+```
+
+Reference: `CRAWL4AI_SDK.md` line 614 - `markdown_v2` deprecated, use `markdown`
+
+### 4. Chat Mode Streaming Input
+
+**Per cc_stream.md:** Use message generator pattern
+
+```python
+# chat_mode.py
+async def message_generator(self) -> AsyncGenerator[Dict[str, Any], None]:
+    while not self._exit_requested:
+        user_input = await asyncio.to_thread(self.ui.get_user_input)
+
+        if user_input.startswith('/'):
+            await self._handle_command(user_input)
+            continue
+
+        # Yield in streaming input format
+        yield {
+            "type": "user",
+            "message": {
+                "role": "user",
+                "content": user_input
+            }
+        }
+
+async def run(self):
+    async with ClaudeSDKClient(options=self.options) as client:
+        await client.query(self.message_generator())  # Pass generator
+
+        async for message in client.receive_messages():
+            # Process streaming responses
+```
+
+**Key:** Generator keeps yielding user inputs, SDK streams responses back.
+
+### 5. Claude SDK Integration
+
+**Setup:**
+```python
+from claude_agent_sdk import tool, create_sdk_mcp_server, ClaudeSDKClient, ClaudeAgentOptions
+
+# 1. Define tools with @tool decorator
+@tool("quick_crawl", "description", {"url": str, "output_format": str})
+async def quick_crawl(args: Dict[str, Any]) -> Dict[str, Any]:
+    return {"content": [{"type": "text", "text": json.dumps(result)}]}
+
+# 2. Create MCP server
+crawler_server = create_sdk_mcp_server(
+    name="crawl4ai",
+    version="1.0.0",
+    tools=[quick_crawl, start_session, ...]  # List of @tool functions
+)
+
+# 3. Configure options
+options = ClaudeAgentOptions(
+    mcp_servers={"crawler": crawler_server},
+    allowed_tools=[
+        "mcp__crawler__quick_crawl",  # Format: mcp__{server}__{tool}
+        "mcp__crawler__start_session",
+        # Built-in tools:
+        "Read", "Write", "Edit", "Glob", "Grep", "Bash", "NotebookEdit"
+    ],
+    system_prompt=SYSTEM_PROMPT,
+    permission_mode="acceptEdits"
+)
+
+# 4. Use client
+async with ClaudeSDKClient(options=options) as client:
+    await client.query(prompt_or_generator)
+    async for message in client.receive_messages():
+        # Process AssistantMessage, ResultMessage, etc.
+```
+
+**Tool response format:**
+```python
+return {
+    "content": [{
+        "type": "text",
+        "text": json.dumps({"success": True, "data": "..."})
+    }]
+}
+```
+
+## Operating Modes
+
+### Single-Shot Mode
+```bash
+python -m crawl4ai.agent.agent_crawl "Crawl example.com"
+```
+- One prompt → execute → exit
+- Uses singleton browser
+- No cleanup of browser (process exit handles it)
+
+### Chat Mode
+```bash
+python -m crawl4ai.agent.agent_crawl --chat
+```
+- Interactive loop with streaming I/O
+- Commands: `/exit` `/clear` `/help` `/browser`
+- Browser persists across all turns
+- Cleanup on exit: `BrowserManager.close_browser()`
+
+## Testing Architecture
+
+**3 test levels:**
+
+1. **Component tests** (`test_chat.py`): Non-interactive, tests individual classes
+2. **Tool tests** (`test_tools.py`): Direct AsyncWebCrawler calls, validates Crawl4AI integration
+3. **Scenario tests** (`test_scenarios.py`): Automated multi-turn conversations
+   - Injects messages programmatically
+   - Validates tool calls, keywords, files created
+   - Categories: SIMPLE (2), MEDIUM (3), COMPLEX (4)
+
+## Dependencies
+
+```python
+# External
+from crawl4ai import AsyncWebCrawler, BrowserConfig, CrawlerRunConfig, CacheMode
+from crawl4ai.extraction_strategy import LLMExtractionStrategy
+from claude_agent_sdk import (
+    tool, create_sdk_mcp_server, ClaudeSDKClient, ClaudeAgentOptions,
+    AssistantMessage, TextBlock, ResultMessage, ToolUseBlock
+)
+from rich.console import Console  # Already installed
+from rich.markdown import Markdown
+from rich.syntax import Syntax
+
+# Stdlib
+import asyncio, json, uuid, argparse
+from pathlib import Path
+from typing import Optional, Dict, Any, AsyncGenerator
+```
+
+## Common Pitfalls
+
+1. **DON'T** use `async with AsyncWebCrawler()` - breaks singleton pattern
+2. **DON'T** use `result.markdown_v2` - deprecated field
+3. **DON'T** call `crawler.arun()` without URL in session tools - needs current_url
+4. **DON'T** close browser in tools - managed by BrowserManager
+5. **DON'T** use `break` in message iteration - causes asyncio issues
+6. **DO** track session URLs in `CRAWLER_SESSION_URLS` for session tools
+7. **DO** handle both `str` and `MarkdownGenerationResult` for `result.markdown`
+8. **DO** use manual lifecycle `await crawler.start()` / `await crawler.close()`
+
+## Session Storage
+
+**Location:** `~/.crawl4ai/agents/projects/{sanitized_cwd}/{uuid}.jsonl`
+
+**Format:** JSONL with events:
+```json
+{"timestamp": "...", "event": "session_start", "data": {...}}
+{"timestamp": "...", "event": "user_message", "data": {"text": "..."}}
+{"timestamp": "...", "event": "assistant_message", "data": {"turn": 1, "text": "..."}}
+{"timestamp": "...", "event": "session_end", "data": {"duration_ms": 1000, ...}}
+```
+
+## CLI Options
+
+```
+--chat                  Interactive chat mode
+--model MODEL          Claude model override
+--permission-mode MODE  acceptEdits|bypassPermissions|default|plan
+--add-dir DIR [DIR...] Additional accessible directories
+--system-prompt TEXT   Custom system prompt
+--session-id UUID      Resume/specify session
+--debug                Full tracebacks
+```
+
+## Performance Characteristics
+
+- **Browser startup:** ~2-4s (once per session)
+- **Quick crawl:** ~1-2s (reuses browser)
+- **Session operations:** ~1-2s (same browser)
+- **Chat latency:** Real-time streaming, no buffering
+- **Memory:** One browser instance regardless of operations
+
+## Extension Points
+
+1. **New tools:** Add `@tool` function → add to `CRAWL_TOOLS` → add to `allowed_tools`
+2. **New commands:** Add handler in `ChatMode._handle_command()`
+3. **Custom UI:** Replace `TerminalUI` with different renderer
+4. **Persistent sessions:** Serialize browser cookies/state to disk in `BrowserManager`
+5. **Multi-browser:** Modify `BrowserManager` to support multiple configs (not recommended)
+
+## Next Steps: Testing & Evaluation Pipeline
+
+### Phase 1: Automated Testing (CURRENT)
+**Objective:** Verify codebase correctness, not agent quality
+
+**Test Execution:**
+```bash
+# 1. Component tests (fast, non-interactive)
+python crawl4ai/agent/test_chat.py
+# Expected: All components instantiate correctly
+
+# 2. Tool integration tests (medium, requires browser)
+python crawl4ai/agent/test_tools.py
+# Expected: All 7 tools work with Crawl4AI
+
+# 3. Multi-turn scenario tests (slow, comprehensive)
+python crawl4ai/agent/test_scenarios.py
+# Expected: 9 scenarios pass (2 simple, 3 medium, 4 complex)
+# Output: test_agent_output/test_results.json
+```
+
+**Success Criteria:**
+- All component tests pass
+- All tool tests pass
+- ≥80% scenario tests pass (7/9)
+- No crashes, exceptions, or hangs
+- Browser cleanup verified
+
+**Automated Pipeline:**
+```bash
+# Run all tests in sequence, exit on first failure
+cd /Users/unclecode/devs/crawl4ai
+python crawl4ai/agent/test_chat.py && \
+python crawl4ai/agent/test_tools.py && \
+python crawl4ai/agent/test_scenarios.py
+echo "Exit code: $?"  # 0 = all passed
+```
+
+### Phase 2: Evaluation (NEXT)
+**Objective:** Measure agent performance quality
+
+**Metrics to define:**
+- Task completion rate
+- Tool selection accuracy
+- Context retention across turns
+- Planning effectiveness
+- Error recovery capability
+
+**Eval framework needed:**
+- Expand scenario tests with quality scoring
+- Add ground truth comparisons
+- Measure token efficiency
+- Track reasoning quality
+
+**Not in scope yet** - wait for Phase 1 completion
+
+---
+**Last Updated:** 2025-01-17
+**Version:** 1.0.0
+**Status:** Testing Phase - Ready for automated test runs

crawl4ai/agent/__init__.py

@@ -0,0 +1,13 @@
+# __init__.py
+"""Crawl4AI Agent - Browser automation agent powered by Claude Code SDK."""
+
+from .c4ai_tools import CRAWL_TOOLS
+from .c4ai_prompts import SYSTEM_PROMPT
+from .agent_crawl import CrawlAgent, SessionStorage
+
+__all__ = [
+    "CRAWL_TOOLS",
+    "SYSTEM_PROMPT",
+    "CrawlAgent",
+    "SessionStorage",
+]

crawl4ai/agent/agent-cc-sdk.md

@@ -0,0 +1,593 @@
+```python
+# c4ai_tools.py
+"""Crawl4AI tools for Claude Code SDK agent."""
+
+import json
+import asyncio
+from typing import Any, Dict
+from crawl4ai import AsyncWebCrawler, BrowserConfig, CrawlerRunConfig, CacheMode
+from crawl4ai.extraction_strategy import LLMExtractionStrategy
+from claude_agent_sdk import tool
+
+# Global session storage
+CRAWLER_SESSIONS: Dict[str, AsyncWebCrawler] = {}
+
+@tool("quick_crawl", "One-shot crawl for simple extraction. Returns markdown, HTML, or structured data.", {
+    "url": str,
+    "output_format": str,  # "markdown" | "html" | "structured" | "screenshot"
+    "extraction_schema": str,  # Optional: JSON schema for structured extraction
+    "js_code": str,  # Optional: JavaScript to execute before extraction
+    "wait_for": str,  # Optional: CSS selector to wait for
+})
+async def quick_crawl(args: Dict[str, Any]) -> Dict[str, Any]:
+    """Fast single-page crawl without session management."""
+    
+    crawler_config = BrowserConfig(headless=True, verbose=False)
+    run_config = CrawlerRunConfig(
+        cache_mode=CacheMode.BYPASS,
+        js_code=args.get("js_code"),
+        wait_for=args.get("wait_for"),
+    )
+    
+    # Add extraction strategy if structured data requested
+    if args.get("extraction_schema"):
+        run_config.extraction_strategy = LLMExtractionStrategy(
+            provider="openai/gpt-4o-mini",
+            schema=json.loads(args["extraction_schema"]),
+            instruction="Extract data according to the provided schema."
+        )
+    
+    async with AsyncWebCrawler(config=crawler_config) as crawler:
+        result = await crawler.arun(url=args["url"], config=run_config)
+        
+        if not result.success:
+            return {
+                "content": [{
+                    "type": "text",
+                    "text": json.dumps({"error": result.error_message, "success": False})
+                }]
+            }
+        
+        output_map = {
+            "markdown": result.markdown_v2.raw_markdown if result.markdown_v2 else "",
+            "html": result.html,
+            "structured": result.extracted_content,
+            "screenshot": result.screenshot,
+        }
+        
+        response = {
+            "success": True,
+            "url": result.url,
+            "data": output_map.get(args["output_format"], result.markdown_v2.raw_markdown)
+        }
+        
+        return {"content": [{"type": "text", "text": json.dumps(response, indent=2)}]}
+
+
+@tool("start_session", "Start a persistent browser session for multi-step crawling and automation.", {
+    "session_id": str,
+    "headless": bool,  # Default True
+})
+async def start_session(args: Dict[str, Any]) -> Dict[str, Any]:
+    """Initialize a persistent crawler session."""
+    
+    session_id = args["session_id"]
+    if session_id in CRAWLER_SESSIONS:
+        return {"content": [{"type": "text", "text": json.dumps({
+            "error": f"Session {session_id} already exists",
+            "success": False
+        })}]}
+    
+    crawler_config = BrowserConfig(
+        headless=args.get("headless", True),
+        verbose=False
+    )
+    
+    crawler = AsyncWebCrawler(config=crawler_config)
+    await crawler.__aenter__()
+    CRAWLER_SESSIONS[session_id] = crawler
+    
+    return {"content": [{"type": "text", "text": json.dumps({
+        "success": True,
+        "session_id": session_id,
+        "message": f"Browser session {session_id} started"
+    })}]}
+
+
+@tool("navigate", "Navigate to a URL in an active session.", {
+    "session_id": str,
+    "url": str,
+    "wait_for": str,  # Optional: CSS selector to wait for
+    "js_code": str,  # Optional: JavaScript to execute after load
+})
+async def navigate(args: Dict[str, Any]) -> Dict[str, Any]:
+    """Navigate to URL in session."""
+    
+    session_id = args["session_id"]
+    if session_id not in CRAWLER_SESSIONS:
+        return {"content": [{"type": "text", "text": json.dumps({
+            "error": f"Session {session_id} not found",
+            "success": False
+        })}]}
+    
+    crawler = CRAWLER_SESSIONS[session_id]
+    run_config = CrawlerRunConfig(
+        cache_mode=CacheMode.BYPASS,
+        wait_for=args.get("wait_for"),
+        js_code=args.get("js_code"),
+    )
+    
+    result = await crawler.arun(url=args["url"], config=run_config)
+    
+    return {"content": [{"type": "text", "text": json.dumps({
+        "success": result.success,
+        "url": result.url,
+        "message": f"Navigated to {args['url']}"
+    })}]}
+
+
+@tool("extract_data", "Extract data from current page in session using schema or return markdown.", {
+    "session_id": str,
+    "output_format": str,  # "markdown" | "structured"
+    "extraction_schema": str,  # Required for structured, JSON schema
+    "wait_for": str,  # Optional: Wait for element before extraction
+    "js_code": str,  # Optional: Execute JS before extraction
+})
+async def extract_data(args: Dict[str, Any]) -> Dict[str, Any]:
+    """Extract data from current page."""
+    
+    session_id = args["session_id"]
+    if session_id not in CRAWLER_SESSIONS:
+        return {"content": [{"type": "text", "text": json.dumps({
+            "error": f"Session {session_id} not found",
+            "success": False
+        })}]}
+    
+    crawler = CRAWLER_SESSIONS[session_id]
+    run_config = CrawlerRunConfig(
+        cache_mode=CacheMode.BYPASS,
+        wait_for=args.get("wait_for"),
+        js_code=args.get("js_code"),
+    )
+    
+    if args["output_format"] == "structured" and args.get("extraction_schema"):
+        run_config.extraction_strategy = LLMExtractionStrategy(
+            provider="openai/gpt-4o-mini",
+            schema=json.loads(args["extraction_schema"]),
+            instruction="Extract data according to schema."
+        )
+    
+    result = await crawler.arun(config=run_config)
+    
+    if not result.success:
+        return {"content": [{"type": "text", "text": json.dumps({
+            "error": result.error_message,
+            "success": False
+        })}]}
+    
+    data = (result.extracted_content if args["output_format"] == "structured" 
+            else result.markdown_v2.raw_markdown if result.markdown_v2 else "")
+    
+    return {"content": [{"type": "text", "text": json.dumps({
+        "success": True,
+        "data": data
+    }, indent=2)}]}
+
+
+@tool("execute_js", "Execute JavaScript in the current page context.", {
+    "session_id": str,
+    "js_code": str,
+    "wait_for": str,  # Optional: Wait for element after execution
+})
+async def execute_js(args: Dict[str, Any]) -> Dict[str, Any]:
+    """Execute JavaScript in session."""
+    
+    session_id = args["session_id"]
+    if session_id not in CRAWLER_SESSIONS:
+        return {"content": [{"type": "text", "text": json.dumps({
+            "error": f"Session {session_id} not found",
+            "success": False
+        })}]}
+    
+    crawler = CRAWLER_SESSIONS[session_id]
+    run_config = CrawlerRunConfig(
+        cache_mode=CacheMode.BYPASS,
+        js_code=args["js_code"],
+        wait_for=args.get("wait_for"),
+    )
+    
+    result = await crawler.arun(config=run_config)
+    
+    return {"content": [{"type": "text", "text": json.dumps({
+        "success": result.success,
+        "message": "JavaScript executed"
+    })}]}
+
+
+@tool("screenshot", "Take a screenshot of the current page.", {
+    "session_id": str,
+})
+async def screenshot(args: Dict[str, Any]) -> Dict[str, Any]:
+    """Capture screenshot."""
+    
+    session_id = args["session_id"]
+    if session_id not in CRAWLER_SESSIONS:
+        return {"content": [{"type": "text", "text": json.dumps({
+            "error": f"Session {session_id} not found",
+            "success": False
+        })}]}
+    
+    crawler = CRAWLER_SESSIONS[session_id]
+    result = await crawler.arun(config=CrawlerRunConfig(cache_mode=CacheMode.BYPASS))
+    
+    return {"content": [{"type": "text", "text": json.dumps({
+        "success": True,
+        "screenshot": result.screenshot if result.success else None
+    })}]}
+
+
+@tool("close_session", "Close and cleanup a browser session.", {
+    "session_id": str,
+})
+async def close_session(args: Dict[str, Any]) -> Dict[str, Any]:
+    """Close crawler session."""
+    
+    session_id = args["session_id"]
+    if session_id not in CRAWLER_SESSIONS:
+        return {"content": [{"type": "text", "text": json.dumps({
+            "error": f"Session {session_id} not found",
+            "success": False
+        })}]}
+    
+    crawler = CRAWLER_SESSIONS.pop(session_id)
+    await crawler.__aexit__(None, None, None)
+    
+    return {"content": [{"type": "text", "text": json.dumps({
+        "success": True,
+        "message": f"Session {session_id} closed"
+    })}]}
+
+
+# Export all tools
+CRAWL_TOOLS = [
+    quick_crawl,
+    start_session,
+    navigate,
+    extract_data,
+    execute_js,
+    screenshot,
+    close_session,
+]
+```
+
+```python
+# c4ai_prompts.py
+"""System prompts for Crawl4AI agent."""
+
+SYSTEM_PROMPT = """You are an expert web crawling and browser automation agent powered by Crawl4AI.
+
+# Core Capabilities
+
+You can perform sophisticated multi-step web scraping and automation tasks through two modes:
+
+## Quick Mode (simple tasks)
+- Use `quick_crawl` for single-page data extraction
+- Best for: simple scrapes, getting page content, one-time extractions
+
+## Session Mode (complex tasks)
+- Use `start_session` to create persistent browser sessions
+- Navigate, interact, extract data across multiple pages
+- Essential for: workflows requiring JS execution, pagination, filtering, multi-step automation
+
+# Tool Usage Patterns
+
+## Simple Extraction
+1. Use `quick_crawl` with appropriate output_format
+2. Provide extraction_schema for structured data
+
+## Multi-Step Workflow
+1. `start_session` - Create browser session with unique ID
+2. `navigate` - Go to target URL
+3. `execute_js` - Interact with page (click buttons, scroll, fill forms)
+4. `extract_data` - Get data using schema or markdown
+5. Repeat steps 2-4 as needed
+6. `close_session` - Clean up when done
+
+# Critical Instructions
+
+1. **Iteration & Validation**: When tasks require filtering or conditional logic:
+   - Extract data first, analyze results
+   - Filter/validate in your reasoning
+   - Make subsequent tool calls based on validation
+   - Continue until task criteria are met
+
+2. **Structured Extraction**: Always use JSON schemas for structured data:
+   ```json
+   {
+     "type": "object",
+     "properties": {
+       "field_name": {"type": "string"},
+       "price": {"type": "number"}
+     }
+   }
+   ```
+
+3. **Session Management**:
+   - Generate unique session IDs (e.g., "product_scrape_001")
+   - Always close sessions when done
+   - Use sessions for tasks requiring multiple page visits
+
+4. **JavaScript Execution**:
+   - Use for: clicking buttons, scrolling, waiting for dynamic content
+   - Example: `js_code: "document.querySelector('.load-more').click()"`
+   - Combine with `wait_for` to ensure content loads
+
+5. **Error Handling**:
+   - Check `success` field in all responses
+   - Retry with different strategies if extraction fails
+   - Report specific errors to user
+
+6. **Data Persistence**:
+   - Save results using `Write` tool to JSON files
+   - Use descriptive filenames with timestamps
+   - Structure data clearly for user consumption
+
+# Example Workflows
+
+## Workflow 1: Filter & Crawl
+Task: "Find products >$10, crawl each, extract details"
+
+1. `quick_crawl` product listing page with schema for [name, price, url]
+2. Analyze results, filter price > 10 in reasoning
+3. `start_session` for detailed crawling
+4. For each filtered product:
+   - `navigate` to product URL
+   - `extract_data` with detail schema
+5. Aggregate results
+6. `close_session`
+7. `Write` results to JSON
+
+## Workflow 2: Paginated Scraping
+Task: "Scrape all items across multiple pages"
+
+1. `start_session`
+2. `navigate` to page 1
+3. `extract_data` items from current page
+4. Check for "next" button
+5. `execute_js` to click next
+6. Repeat 3-5 until no more pages
+7. `close_session`
+8. Save aggregated data
+
+## Workflow 3: Dynamic Content
+Task: "Scrape reviews after clicking 'Load More'"
+
+1. `start_session`
+2. `navigate` to product page
+3. `execute_js` to click load more button
+4. `wait_for` reviews container
+5. `extract_data` all reviews
+6. `close_session`
+
+# Quality Guidelines
+
+- **Be thorough**: Don't stop until task requirements are fully met
+- **Validate data**: Check extracted data matches expected format
+- **Handle edge cases**: Empty results, pagination limits, rate limiting
+- **Clear reporting**: Summarize what was found, any issues encountered
+- **Efficient**: Use quick_crawl when possible, sessions only when needed
+
+# Output Format
+
+When saving data, use clean JSON structure:
+```json
+{
+  "metadata": {
+    "scraped_at": "ISO timestamp",
+    "source_url": "...",
+    "total_items": 0
+  },
+  "data": [...]
+}
+```
+
+Always provide a final summary of:
+- Items found/processed
+- Time taken
+- Files created
+- Any warnings/errors
+
+Remember: You have unlimited turns to complete the task. Take your time, validate each step, and ensure quality results."""
+```
+
+```python
+# agent_crawl.py
+"""Crawl4AI Agent CLI - Browser automation agent powered by Claude Code SDK."""
+
+import asyncio
+import sys
+import json
+import uuid
+from pathlib import Path
+from datetime import datetime
+from typing import Optional
+import argparse
+
+from claude_agent_sdk import ClaudeSDKClient, ClaudeAgentOptions, create_sdk_mcp_server
+from claude_agent_sdk import AssistantMessage, TextBlock, ResultMessage
+
+from c4ai_tools import CRAWL_TOOLS
+from c4ai_prompts import SYSTEM_PROMPT
+
+
+class SessionStorage:
+    """Manage session storage in ~/.crawl4ai/agents/projects/"""
+    
+    def __init__(self, cwd: Optional[str] = None):
+        self.cwd = Path(cwd) if cwd else Path.cwd()
+        self.base_dir = Path.home() / ".crawl4ai" / "agents" / "projects"
+        self.project_dir = self.base_dir / self._sanitize_path(str(self.cwd.resolve()))
+        self.project_dir.mkdir(parents=True, exist_ok=True)
+        self.session_id = str(uuid.uuid4())
+        self.log_file = self.project_dir / f"{self.session_id}.jsonl"
+    
+    @staticmethod
+    def _sanitize_path(path: str) -> str:
+        """Convert /Users/unclecode/devs/test to -Users-unclecode-devs-test"""
+        return path.replace("/", "-").replace("\\", "-")
+    
+    def log(self, event_type: str, data: dict):
+        """Append event to JSONL log."""
+        entry = {
+            "timestamp": datetime.utcnow().isoformat(),
+            "event": event_type,
+            "session_id": self.session_id,
+            "data": data
+        }
+        with open(self.log_file, "a") as f:
+            f.write(json.dumps(entry) + "\n")
+    
+    def get_session_path(self) -> str:
+        """Return path to current session log."""
+        return str(self.log_file)
+
+
+class CrawlAgent:
+    """Crawl4AI agent wrapper."""
+    
+    def __init__(self, args: argparse.Namespace):
+        self.args = args
+        self.storage = SessionStorage(args.add_dir[0] if args.add_dir else None)
+        self.client: Optional[ClaudeSDKClient] = None
+        
+        # Create MCP server with crawl tools
+        self.crawler_server = create_sdk_mcp_server(
+            name="crawl4ai",
+            version="1.0.0",
+            tools=CRAWL_TOOLS
+        )
+        
+        # Build options
+        self.options = ClaudeAgentOptions(
+            mcp_servers={"crawler": self.crawler_server},
+            allowed_tools=[
+                "mcp__crawler__quick_crawl",
+                "mcp__crawler__start_session",
+                "mcp__crawler__navigate",
+                "mcp__crawler__extract_data",
+                "mcp__crawler__execute_js",
+                "mcp__crawler__screenshot",
+                "mcp__crawler__close_session",
+                "Write", "Read", "Bash"
+            ],
+            system_prompt=SYSTEM_PROMPT if not args.system_prompt else args.system_prompt,
+            permission_mode=args.permission_mode or "acceptEdits",
+            cwd=args.add_dir[0] if args.add_dir else str(Path.cwd()),
+            model=args.model,
+            session_id=args.session_id or self.storage.session_id,
+        )
+    
+    async def run(self, prompt: str):
+        """Execute crawl task."""
+        
+        self.storage.log("session_start", {
+            "prompt": prompt,
+            "cwd": self.options.cwd,
+            "model": self.options.model
+        })
+        
+        print(f"\n🕷️  Crawl4AI Agent")
+        print(f"📁 Session: {self.storage.session_id}")
+        print(f"💾 Log: {self.storage.get_session_path()}")
+        print(f"🎯 Task: {prompt}\n")
+        
+        async with ClaudeSDKClient(options=self.options) as client:
+            self.client = client
+            await client.query(prompt)
+            
+            turn = 0
+            async for message in client.receive_messages():
+                turn += 1
+                
+                if isinstance(message, AssistantMessage):
+                    for block in message.content:
+                        if isinstance(block, TextBlock):
+                            print(f"\n💭 [{turn}] {block.text}")
+                            self.storage.log("assistant_message", {"turn": turn, "text": block.text})
+                
+                elif isinstance(message, ResultMessage):
+                    print(f"\n✅ Completed in {message.duration_ms/1000:.2f}s")
+                    print(f"💰 Cost: ${message.total_cost_usd:.4f}" if message.total_cost_usd else "")
+                    print(f"🔄 Turns: {message.num_turns}")
+                    
+                    self.storage.log("session_end", {
+                        "duration_ms": message.duration_ms,
+                        "cost_usd": message.total_cost_usd,
+                        "turns": message.num_turns,
+                        "success": not message.is_error
+                    })
+                    break
+        
+        print(f"\n📊 Session log: {self.storage.get_session_path()}\n")
+
+
+def main():
+    parser = argparse.ArgumentParser(
+        description="Crawl4AI Agent - Browser automation powered by Claude Code SDK",
+        formatter_class=argparse.RawDescriptionHelpFormatter
+    )
+    
+    parser.add_argument("prompt", nargs="?", help="Your crawling task prompt")
+    parser.add_argument("--system-prompt", help="Custom system prompt")
+    parser.add_argument("--permission-mode", choices=["acceptEdits", "bypassPermissions", "default", "plan"],
+                       help="Permission mode for tool execution")
+    parser.add_argument("--model", help="Model to use (e.g., 'sonnet', 'opus')")
+    parser.add_argument("--add-dir", nargs="+", help="Additional directories for file access")
+    parser.add_argument("--session-id", help="Use specific session ID (UUID)")
+    parser.add_argument("-v", "--version", action="version", version="Crawl4AI Agent 1.0.0")
+    parser.add_argument("--debug", action="store_true", help="Enable debug mode")
+    
+    args = parser.parse_args()
+    
+    if not args.prompt:
+        parser.print_help()
+        print("\nExample usage:")
+        print('  crawl-agent "Scrape all products from example.com with price > $10"')
+        print('  crawl-agent --add-dir ~/projects "Find all Python files and analyze imports"')
+        sys.exit(1)
+    
+    try:
+        agent = CrawlAgent(args)
+        asyncio.run(agent.run(args.prompt))
+    except KeyboardInterrupt:
+        print("\n\n⚠️  Interrupted by user")
+        sys.exit(0)
+    except Exception as e:
+        print(f"\n❌ Error: {e}")
+        if args.debug:
+            raise
+        sys.exit(1)
+
+
+if __name__ == "__main__":
+    main()
+```
+
+**Usage:**
+
+```bash
+# Simple scrape
+python agent_crawl.py "Get all product names from example.com"
+
+# Complex filtering
+python agent_crawl.py "Find products >$10 from shop.com, crawl each, extract id/name/price"
+
+# Multi-step automation
+python agent_crawl.py "Go to amazon.com, search 'laptop', filter 4+ stars, scrape top 10"
+
+# With options
+python agent_crawl.py --add-dir ~/projects --model sonnet "Scrape competitor prices"
+```
+
+**Session logs stored at:**
+`~/.crawl4ai/agents/projects/-Users-unclecode-devs-test/{uuid}.jsonl`

crawl4ai/agent/agent_crawl.py

@@ -0,0 +1,202 @@
+# agent_crawl.py
+"""Crawl4AI Agent CLI - Browser automation agent powered by Claude Code SDK."""
+
+import asyncio
+import sys
+import json
+import uuid
+from pathlib import Path
+from datetime import datetime
+from typing import Optional
+import argparse
+
+from claude_agent_sdk import ClaudeSDKClient, ClaudeAgentOptions, create_sdk_mcp_server
+from claude_agent_sdk import AssistantMessage, TextBlock, ResultMessage
+
+from .c4ai_tools import CRAWL_TOOLS
+from .c4ai_prompts import SYSTEM_PROMPT
+from .terminal_ui import TerminalUI
+from .chat_mode import ChatMode
+
+
+class SessionStorage:
+    """Manage session storage in ~/.crawl4ai/agents/projects/"""
+
+    def __init__(self, cwd: Optional[str] = None):
+        self.cwd = Path(cwd) if cwd else Path.cwd()
+        self.base_dir = Path.home() / ".crawl4ai" / "agents" / "projects"
+        self.project_dir = self.base_dir / self._sanitize_path(str(self.cwd.resolve()))
+        self.project_dir.mkdir(parents=True, exist_ok=True)
+        self.session_id = str(uuid.uuid4())
+        self.log_file = self.project_dir / f"{self.session_id}.jsonl"
+
+    @staticmethod
+    def _sanitize_path(path: str) -> str:
+        """Convert /Users/unclecode/devs/test to -Users-unclecode-devs-test"""
+        return path.replace("/", "-").replace("\\", "-")
+
+    def log(self, event_type: str, data: dict):
+        """Append event to JSONL log."""
+        entry = {
+            "timestamp": datetime.utcnow().isoformat(),
+            "event": event_type,
+            "session_id": self.session_id,
+            "data": data
+        }
+        with open(self.log_file, "a") as f:
+            f.write(json.dumps(entry) + "\n")
+
+    def get_session_path(self) -> str:
+        """Return path to current session log."""
+        return str(self.log_file)
+
+
+class CrawlAgent:
+    """Crawl4AI agent wrapper."""
+
+    def __init__(self, args: argparse.Namespace):
+        self.args = args
+        self.storage = SessionStorage(args.add_dir[0] if args.add_dir else None)
+        self.client: Optional[ClaudeSDKClient] = None
+
+        # Create MCP server with crawl tools
+        self.crawler_server = create_sdk_mcp_server(
+            name="crawl4ai",
+            version="1.0.0",
+            tools=CRAWL_TOOLS
+        )
+
+        # Build options
+        self.options = ClaudeAgentOptions(
+            mcp_servers={"crawler": self.crawler_server},
+            allowed_tools=[
+                # Crawl4AI tools
+                "mcp__crawler__quick_crawl",
+                "mcp__crawler__start_session",
+                "mcp__crawler__navigate",
+                "mcp__crawler__extract_data",
+                "mcp__crawler__execute_js",
+                "mcp__crawler__screenshot",
+                "mcp__crawler__close_session",
+                # Claude Code SDK built-in tools
+                "Read",
+                "Write",
+                "Edit",
+                "Glob",
+                "Grep",
+                "Bash",
+                "NotebookEdit"
+            ],
+            system_prompt=SYSTEM_PROMPT if not args.system_prompt else args.system_prompt,
+            permission_mode=args.permission_mode or "acceptEdits",
+            cwd=args.add_dir[0] if args.add_dir else str(Path.cwd()),
+            model=args.model,
+        )
+
+    async def run(self, prompt: str):
+        """Execute crawl task."""
+
+        self.storage.log("session_start", {
+            "prompt": prompt,
+            "cwd": self.options.cwd,
+            "model": self.options.model
+        })
+
+        print(f"\n🕷️  Crawl4AI Agent")
+        print(f"📁 Session: {self.storage.session_id}")
+        print(f"💾 Log: {self.storage.get_session_path()}")
+        print(f"🎯 Task: {prompt}\n")
+
+        async with ClaudeSDKClient(options=self.options) as client:
+            self.client = client
+            await client.query(prompt)
+
+            turn = 0
+            async for message in client.receive_messages():
+                turn += 1
+
+                if isinstance(message, AssistantMessage):
+                    for block in message.content:
+                        if isinstance(block, TextBlock):
+                            print(f"\n💭 [{turn}] {block.text}")
+                            self.storage.log("assistant_message", {"turn": turn, "text": block.text})
+
+                elif isinstance(message, ResultMessage):
+                    print(f"\n✅ Completed in {message.duration_ms/1000:.2f}s")
+                    print(f"💰 Cost: ${message.total_cost_usd:.4f}" if message.total_cost_usd else "")
+                    print(f"🔄 Turns: {message.num_turns}")
+
+                    self.storage.log("session_end", {
+                        "duration_ms": message.duration_ms,
+                        "cost_usd": message.total_cost_usd,
+                        "turns": message.num_turns,
+                        "success": not message.is_error
+                    })
+                    break
+
+        print(f"\n📊 Session log: {self.storage.get_session_path()}\n")
+
+
+def main():
+    parser = argparse.ArgumentParser(
+        description="Crawl4AI Agent - Browser automation powered by Claude Code SDK",
+        formatter_class=argparse.RawDescriptionHelpFormatter
+    )
+
+    parser.add_argument("prompt", nargs="?", help="Your crawling task prompt (not used in --chat mode)")
+    parser.add_argument("--chat", action="store_true", help="Start interactive chat mode")
+    parser.add_argument("--system-prompt", help="Custom system prompt")
+    parser.add_argument("--permission-mode", choices=["acceptEdits", "bypassPermissions", "default", "plan"],
+                       help="Permission mode for tool execution")
+    parser.add_argument("--model", help="Model to use (e.g., 'sonnet', 'opus')")
+    parser.add_argument("--add-dir", nargs="+", help="Additional directories for file access")
+    parser.add_argument("--session-id", help="Use specific session ID (UUID)")
+    parser.add_argument("-v", "--version", action="version", version="Crawl4AI Agent 1.0.0")
+    parser.add_argument("--debug", action="store_true", help="Enable debug mode")
+
+    args = parser.parse_args()
+
+    # Chat mode - interactive
+    if args.chat:
+        try:
+            agent = CrawlAgent(args)
+            ui = TerminalUI()
+            chat = ChatMode(agent.options, ui, agent.storage)
+            asyncio.run(chat.run())
+        except KeyboardInterrupt:
+            print("\n\n⚠️  Chat interrupted by user")
+            sys.exit(0)
+        except Exception as e:
+            print(f"\n❌ Error: {e}")
+            if args.debug:
+                raise
+            sys.exit(1)
+        return
+
+    # Single-shot mode - requires prompt
+    if not args.prompt:
+        parser.print_help()
+        print("\nExample usage:")
+        print('  # Single-shot mode:')
+        print('  crawl-agent "Scrape all products from example.com with price > $10"')
+        print('  crawl-agent --add-dir ~/projects "Find all Python files and analyze imports"')
+        print()
+        print('  # Interactive chat mode:')
+        print('  crawl-agent --chat')
+        sys.exit(1)
+
+    try:
+        agent = CrawlAgent(args)
+        asyncio.run(agent.run(args.prompt))
+    except KeyboardInterrupt:
+        print("\n\n⚠️  Interrupted by user")
+        sys.exit(0)
+    except Exception as e:
+        print(f"\n❌ Error: {e}")
+        if args.debug:
+            raise
+        sys.exit(1)
+
+
+if __name__ == "__main__":
+    main()

crawl4ai/agent/browser_manager.py

@@ -0,0 +1,73 @@
+"""Browser session management with singleton pattern for persistent browser instances."""
+
+from typing import Optional
+from crawl4ai import AsyncWebCrawler, BrowserConfig
+
+
+class BrowserManager:
+    """Singleton browser manager for persistent browser sessions across agent operations."""
+
+    _instance: Optional['BrowserManager'] = None
+    _crawler: Optional[AsyncWebCrawler] = None
+    _config: Optional[BrowserConfig] = None
+
+    def __new__(cls):
+        if cls._instance is None:
+            cls._instance = super().__new__(cls)
+        return cls._instance
+
+    @classmethod
+    async def get_browser(cls, config: Optional[BrowserConfig] = None) -> AsyncWebCrawler:
+        """
+        Get or create the singleton browser instance.
+
+        Args:
+            config: Optional browser configuration. Only used if no browser exists yet.
+                   To change config, use reconfigure_browser() instead.
+
+        Returns:
+            AsyncWebCrawler instance
+        """
+        # Create new browser if needed
+        if cls._crawler is None:
+            # Create default config if none provided
+            if config is None:
+                config = BrowserConfig(headless=True, verbose=False)
+
+            cls._crawler = AsyncWebCrawler(config=config)
+            await cls._crawler.start()
+            cls._config = config
+
+        return cls._crawler
+
+    @classmethod
+    async def reconfigure_browser(cls, new_config: BrowserConfig) -> AsyncWebCrawler:
+        """
+        Close current browser and create a new one with different configuration.
+
+        Args:
+            new_config: New browser configuration
+
+        Returns:
+            New AsyncWebCrawler instance
+        """
+        await cls.close_browser()
+        return await cls.get_browser(new_config)
+
+    @classmethod
+    async def close_browser(cls):
+        """Close the current browser instance and cleanup."""
+        if cls._crawler is not None:
+            await cls._crawler.close()
+            cls._crawler = None
+            cls._config = None
+
+    @classmethod
+    def is_browser_active(cls) -> bool:
+        """Check if browser is currently active."""
+        return cls._crawler is not None
+
+    @classmethod
+    def get_current_config(cls) -> Optional[BrowserConfig]:
+        """Get the current browser configuration."""
+        return cls._config

crawl4ai/agent/c4ai_prompts.py

@@ -0,0 +1,137 @@
+# c4ai_prompts.py
+"""System prompts for Crawl4AI agent."""
+
+SYSTEM_PROMPT = """You are an expert web crawling and browser automation agent powered by Crawl4AI.
+
+# Core Capabilities
+
+You can perform sophisticated multi-step web scraping and automation tasks through two modes:
+
+## Quick Mode (simple tasks)
+- Use `quick_crawl` for single-page data extraction
+- Best for: simple scrapes, getting page content, one-time extractions
+
+## Session Mode (complex tasks)
+- Use `start_session` to create persistent browser sessions
+- Navigate, interact, extract data across multiple pages
+- Essential for: workflows requiring JS execution, pagination, filtering, multi-step automation
+
+# Tool Usage Patterns
+
+## Simple Extraction
+1. Use `quick_crawl` with appropriate output_format
+2. Provide extraction_schema for structured data
+
+## Multi-Step Workflow
+1. `start_session` - Create browser session with unique ID
+2. `navigate` - Go to target URL
+3. `execute_js` - Interact with page (click buttons, scroll, fill forms)
+4. `extract_data` - Get data using schema or markdown
+5. Repeat steps 2-4 as needed
+6. `close_session` - Clean up when done
+
+# Critical Instructions
+
+1. **Iteration & Validation**: When tasks require filtering or conditional logic:
+   - Extract data first, analyze results
+   - Filter/validate in your reasoning
+   - Make subsequent tool calls based on validation
+   - Continue until task criteria are met
+
+2. **Structured Extraction**: Always use JSON schemas for structured data:
+   ```json
+   {
+     "type": "object",
+     "properties": {
+       "field_name": {"type": "string"},
+       "price": {"type": "number"}
+     }
+   }
+   ```
+
+3. **Session Management**:
+   - Generate unique session IDs (e.g., "product_scrape_001")
+   - Always close sessions when done
+   - Use sessions for tasks requiring multiple page visits
+
+4. **JavaScript Execution**:
+   - Use for: clicking buttons, scrolling, waiting for dynamic content
+   - Example: `js_code: "document.querySelector('.load-more').click()"`
+   - Combine with `wait_for` to ensure content loads
+
+5. **Error Handling**:
+   - Check `success` field in all responses
+   - Retry with different strategies if extraction fails
+   - Report specific errors to user
+
+6. **Data Persistence**:
+   - Save results using `Write` tool to JSON files
+   - Use descriptive filenames with timestamps
+   - Structure data clearly for user consumption
+
+# Example Workflows
+
+## Workflow 1: Filter & Crawl
+Task: "Find products >$10, crawl each, extract details"
+
+1. `quick_crawl` product listing page with schema for [name, price, url]
+2. Analyze results, filter price > 10 in reasoning
+3. `start_session` for detailed crawling
+4. For each filtered product:
+   - `navigate` to product URL
+   - `extract_data` with detail schema
+5. Aggregate results
+6. `close_session`
+7. `Write` results to JSON
+
+## Workflow 2: Paginated Scraping
+Task: "Scrape all items across multiple pages"
+
+1. `start_session`
+2. `navigate` to page 1
+3. `extract_data` items from current page
+4. Check for "next" button
+5. `execute_js` to click next
+6. Repeat 3-5 until no more pages
+7. `close_session`
+8. Save aggregated data
+
+## Workflow 3: Dynamic Content
+Task: "Scrape reviews after clicking 'Load More'"
+
+1. `start_session`
+2. `navigate` to product page
+3. `execute_js` to click load more button
+4. `wait_for` reviews container
+5. `extract_data` all reviews
+6. `close_session`
+
+# Quality Guidelines
+
+- **Be thorough**: Don't stop until task requirements are fully met
+- **Validate data**: Check extracted data matches expected format
+- **Handle edge cases**: Empty results, pagination limits, rate limiting
+- **Clear reporting**: Summarize what was found, any issues encountered
+- **Efficient**: Use quick_crawl when possible, sessions only when needed
+
+# Output Format
+
+When saving data, use clean JSON structure:
+```json
+{
+  "metadata": {
+    "scraped_at": "ISO timestamp",
+    "source_url": "...",
+    "total_items": 0
+  },
+  "data": [...]
+}
+```
+
+Always provide a final summary of:
+- Items found/processed
+- Time taken
+- Files created
+- Any warnings/errors
+
+Remember: You have unlimited turns to complete the task. Take your time, validate each step, and ensure quality results."""

crawl4ai/agent/c4ai_tools.py

@@ -0,0 +1,314 @@
+# c4ai_tools.py
+"""Crawl4AI tools for Claude Code SDK agent."""
+
+import json
+import asyncio
+from typing import Any, Dict
+from crawl4ai import AsyncWebCrawler, BrowserConfig, CrawlerRunConfig, CacheMode
+from crawl4ai.extraction_strategy import LLMExtractionStrategy
+from claude_agent_sdk import tool
+
+from .browser_manager import BrowserManager
+
+# Global session storage (for named sessions only)
+CRAWLER_SESSIONS: Dict[str, AsyncWebCrawler] = {}
+CRAWLER_SESSION_URLS: Dict[str, str] = {}  # Track current URL per session
+
+@tool("quick_crawl", "One-shot crawl for simple extraction. Returns markdown, HTML, or structured data.", {
+    "url": str,
+    "output_format": str,  # "markdown" | "html" | "structured" | "screenshot"
+    "extraction_schema": str,  # Optional: JSON schema for structured extraction
+    "js_code": str,  # Optional: JavaScript to execute before extraction
+    "wait_for": str,  # Optional: CSS selector to wait for
+})
+async def quick_crawl(args: Dict[str, Any]) -> Dict[str, Any]:
+    """Fast single-page crawl using persistent browser."""
+
+    # Use singleton browser manager
+    crawler_config = BrowserConfig(headless=True, verbose=False)
+    crawler = await BrowserManager.get_browser(crawler_config)
+
+    run_config = CrawlerRunConfig(
+        cache_mode=CacheMode.BYPASS,
+        js_code=args.get("js_code"),
+        wait_for=args.get("wait_for"),
+    )
+
+    # Add extraction strategy if structured data requested
+    if args.get("extraction_schema"):
+        run_config.extraction_strategy = LLMExtractionStrategy(
+            provider="openai/gpt-4o-mini",
+            schema=json.loads(args["extraction_schema"]),
+            instruction="Extract data according to the provided schema."
+        )
+
+    result = await crawler.arun(url=args["url"], config=run_config)
+
+    if not result.success:
+        return {
+            "content": [{
+                "type": "text",
+                "text": json.dumps({"error": result.error_message, "success": False})
+            }]
+        }
+
+    # Handle markdown - can be string or MarkdownGenerationResult object
+    markdown_content = ""
+    if isinstance(result.markdown, str):
+        markdown_content = result.markdown
+    elif hasattr(result.markdown, 'raw_markdown'):
+        markdown_content = result.markdown.raw_markdown
+
+    output_map = {
+        "markdown": markdown_content,
+        "html": result.html,
+        "structured": result.extracted_content,
+        "screenshot": result.screenshot,
+    }
+
+    response = {
+        "success": True,
+        "url": result.url,
+        "data": output_map.get(args["output_format"], markdown_content)
+    }
+
+    return {"content": [{"type": "text", "text": json.dumps(response, indent=2)}]}
+
+
+@tool("start_session", "Start a named browser session for multi-step crawling and automation.", {
+    "session_id": str,
+    "headless": bool,  # Default True
+})
+async def start_session(args: Dict[str, Any]) -> Dict[str, Any]:
+    """Initialize a named crawler session using the singleton browser."""
+
+    session_id = args["session_id"]
+    if session_id in CRAWLER_SESSIONS:
+        return {"content": [{"type": "text", "text": json.dumps({
+            "error": f"Session {session_id} already exists",
+            "success": False
+        })}]}
+
+    # Use the singleton browser
+    crawler_config = BrowserConfig(
+        headless=args.get("headless", True),
+        verbose=False
+    )
+    crawler = await BrowserManager.get_browser(crawler_config)
+
+    # Store reference for named session
+    CRAWLER_SESSIONS[session_id] = crawler
+
+    return {"content": [{"type": "text", "text": json.dumps({
+        "success": True,
+        "session_id": session_id,
+        "message": f"Browser session {session_id} started"
+    })}]}
+
+
+@tool("navigate", "Navigate to a URL in an active session.", {
+    "session_id": str,
+    "url": str,
+    "wait_for": str,  # Optional: CSS selector to wait for
+    "js_code": str,  # Optional: JavaScript to execute after load
+})
+async def navigate(args: Dict[str, Any]) -> Dict[str, Any]:
+    """Navigate to URL in session."""
+
+    session_id = args["session_id"]
+    if session_id not in CRAWLER_SESSIONS:
+        return {"content": [{"type": "text", "text": json.dumps({
+            "error": f"Session {session_id} not found",
+            "success": False
+        })}]}
+
+    crawler = CRAWLER_SESSIONS[session_id]
+    run_config = CrawlerRunConfig(
+        cache_mode=CacheMode.BYPASS,
+        wait_for=args.get("wait_for"),
+        js_code=args.get("js_code"),
+    )
+
+    result = await crawler.arun(url=args["url"], config=run_config)
+
+    # Store current URL for this session
+    if result.success:
+        CRAWLER_SESSION_URLS[session_id] = result.url
+
+    return {"content": [{"type": "text", "text": json.dumps({
+        "success": result.success,
+        "url": result.url,
+        "message": f"Navigated to {args['url']}"
+    })}]}
+
+
+@tool("extract_data", "Extract data from current page in session using schema or return markdown.", {
+    "session_id": str,
+    "output_format": str,  # "markdown" | "structured"
+    "extraction_schema": str,  # Required for structured, JSON schema
+    "wait_for": str,  # Optional: Wait for element before extraction
+    "js_code": str,  # Optional: Execute JS before extraction
+})
+async def extract_data(args: Dict[str, Any]) -> Dict[str, Any]:
+    """Extract data from current page."""
+
+    session_id = args["session_id"]
+    if session_id not in CRAWLER_SESSIONS:
+        return {"content": [{"type": "text", "text": json.dumps({
+            "error": f"Session {session_id} not found",
+            "success": False
+        })}]}
+
+    # Check if we have a current URL for this session
+    if session_id not in CRAWLER_SESSION_URLS:
+        return {"content": [{"type": "text", "text": json.dumps({
+            "error": "No page loaded in session. Use 'navigate' first.",
+            "success": False
+        })}]}
+
+    crawler = CRAWLER_SESSIONS[session_id]
+    current_url = CRAWLER_SESSION_URLS[session_id]
+
+    run_config = CrawlerRunConfig(
+        cache_mode=CacheMode.BYPASS,
+        wait_for=args.get("wait_for"),
+        js_code=args.get("js_code"),
+    )
+
+    if args["output_format"] == "structured" and args.get("extraction_schema"):
+        run_config.extraction_strategy = LLMExtractionStrategy(
+            provider="openai/gpt-4o-mini",
+            schema=json.loads(args["extraction_schema"]),
+            instruction="Extract data according to schema."
+        )
+
+    result = await crawler.arun(url=current_url, config=run_config)
+
+    if not result.success:
+        return {"content": [{"type": "text", "text": json.dumps({
+            "error": result.error_message,
+            "success": False
+        })}]}
+
+    # Handle markdown - can be string or MarkdownGenerationResult object
+    markdown_content = ""
+    if isinstance(result.markdown, str):
+        markdown_content = result.markdown
+    elif hasattr(result.markdown, 'raw_markdown'):
+        markdown_content = result.markdown.raw_markdown
+
+    data = (result.extracted_content if args["output_format"] == "structured"
+            else markdown_content)
+
+    return {"content": [{"type": "text", "text": json.dumps({
+        "success": True,
+        "data": data
+    }, indent=2)}]}
+
+
+@tool("execute_js", "Execute JavaScript in the current page context.", {
+    "session_id": str,
+    "js_code": str,
+    "wait_for": str,  # Optional: Wait for element after execution
+})
+async def execute_js(args: Dict[str, Any]) -> Dict[str, Any]:
+    """Execute JavaScript in session."""
+
+    session_id = args["session_id"]
+    if session_id not in CRAWLER_SESSIONS:
+        return {"content": [{"type": "text", "text": json.dumps({
+            "error": f"Session {session_id} not found",
+            "success": False
+        })}]}
+
+    # Check if we have a current URL for this session
+    if session_id not in CRAWLER_SESSION_URLS:
+        return {"content": [{"type": "text", "text": json.dumps({
+            "error": "No page loaded in session. Use 'navigate' first.",
+            "success": False
+        })}]}
+
+    crawler = CRAWLER_SESSIONS[session_id]
+    current_url = CRAWLER_SESSION_URLS[session_id]
+
+    run_config = CrawlerRunConfig(
+        cache_mode=CacheMode.BYPASS,
+        js_code=args["js_code"],
+        wait_for=args.get("wait_for"),
+    )
+
+    result = await crawler.arun(url=current_url, config=run_config)
+
+    return {"content": [{"type": "text", "text": json.dumps({
+        "success": result.success,
+        "message": "JavaScript executed"
+    })}]}
+
+
+@tool("screenshot", "Take a screenshot of the current page.", {
+    "session_id": str,
+})
+async def screenshot(args: Dict[str, Any]) -> Dict[str, Any]:
+    """Capture screenshot."""
+
+    session_id = args["session_id"]
+    if session_id not in CRAWLER_SESSIONS:
+        return {"content": [{"type": "text", "text": json.dumps({
+            "error": f"Session {session_id} not found",
+            "success": False
+        })}]}
+
+    # Check if we have a current URL for this session
+    if session_id not in CRAWLER_SESSION_URLS:
+        return {"content": [{"type": "text", "text": json.dumps({
+            "error": "No page loaded in session. Use 'navigate' first.",
+            "success": False
+        })}]}
+
+    crawler = CRAWLER_SESSIONS[session_id]
+    current_url = CRAWLER_SESSION_URLS[session_id]
+
+    result = await crawler.arun(
+        url=current_url,
+        config=CrawlerRunConfig(cache_mode=CacheMode.BYPASS, screenshot=True)
+    )
+
+    return {"content": [{"type": "text", "text": json.dumps({
+        "success": True,
+        "screenshot": result.screenshot if result.success else None
+    })}]}
+
+
+@tool("close_session", "Close and cleanup a named browser session.", {
+    "session_id": str,
+})
+async def close_session(args: Dict[str, Any]) -> Dict[str, Any]:
+    """Close named crawler session (browser stays alive for other operations)."""
+
+    session_id = args["session_id"]
+    if session_id not in CRAWLER_SESSIONS:
+        return {"content": [{"type": "text", "text": json.dumps({
+            "error": f"Session {session_id} not found",
+            "success": False
+        })}]}
+
+    # Remove from named sessions, but don't close the singleton browser
+    CRAWLER_SESSIONS.pop(session_id)
+    CRAWLER_SESSION_URLS.pop(session_id, None)  # Remove URL tracking
+
+    return {"content": [{"type": "text", "text": json.dumps({
+        "success": True,
+        "message": f"Session {session_id} closed"
+    })}]}
+
+
+# Export all tools
+CRAWL_TOOLS = [
+    quick_crawl,
+    start_session,
+    navigate,
+    extract_data,
+    execute_js,
+    screenshot,
+    close_session,
+]

crawl4ai/agent/chat_mode.py

@@ -0,0 +1,166 @@
+"""Chat mode implementation with streaming message generator for Claude SDK."""
+
+import asyncio
+from typing import AsyncGenerator, Dict, Any, Optional
+from claude_agent_sdk import ClaudeSDKClient, ClaudeAgentOptions, AssistantMessage, TextBlock, ResultMessage, ToolUseBlock
+
+from .terminal_ui import TerminalUI
+from .browser_manager import BrowserManager
+
+
+class ChatMode:
+    """Interactive chat mode with streaming input/output."""
+
+    def __init__(self, options: ClaudeAgentOptions, ui: TerminalUI, storage):
+        self.options = options
+        self.ui = ui
+        self.storage = storage
+        self._exit_requested = False
+        self._current_streaming_text = ""
+
+    async def message_generator(self) -> AsyncGenerator[Dict[str, Any], None]:
+        """
+        Generate user messages as async generator (streaming input mode per cc_stream.md).
+
+        Yields messages in the format:
+        {
+            "type": "user",
+            "message": {
+                "role": "user",
+                "content": "user input text"
+            }
+        }
+        """
+        while not self._exit_requested:
+            try:
+                # Get user input
+                user_input = await asyncio.to_thread(self.ui.get_user_input)
+
+                # Handle commands
+                if user_input.startswith('/'):
+                    await self._handle_command(user_input)
+                    if self._exit_requested:
+                        break
+                    continue
+
+                # Skip empty input
+                if not user_input.strip():
+                    continue
+
+                # Log user message
+                self.storage.log("user_message", {"text": user_input})
+
+                # Yield user message for agent
+                yield {
+                    "type": "user",
+                    "message": {
+                        "role": "user",
+                        "content": user_input
+                    }
+                }
+
+            except KeyboardInterrupt:
+                self._exit_requested = True
+                break
+            except Exception as e:
+                self.ui.print_error(f"Input error: {e}")
+
+    async def _handle_command(self, command: str):
+        """Handle special chat commands."""
+        cmd = command.lower().strip()
+
+        if cmd == '/exit' or cmd == '/quit':
+            self._exit_requested = True
+            self.ui.print_info("Exiting chat mode...")
+
+        elif cmd == '/clear':
+            self.ui.clear_screen()
+
+        elif cmd == '/help':
+            self.ui.show_commands()
+
+        elif cmd == '/browser':
+            # Show browser status
+            if BrowserManager.is_browser_active():
+                config = BrowserManager.get_current_config()
+                self.ui.print_info(f"Browser active: {config}")
+            else:
+                self.ui.print_info("No browser instance active")
+
+        else:
+            self.ui.print_error(f"Unknown command: {command}")
+
+    async def run(self):
+        """Run the interactive chat loop with streaming responses."""
+        # Show header
+        self.ui.show_header(
+            session_id=str(self.options.session_id or "chat"),
+            log_path=self.storage.get_session_path() if hasattr(self.storage, 'get_session_path') else "N/A"
+        )
+        self.ui.show_commands()
+
+        try:
+            async with ClaudeSDKClient(options=self.options) as client:
+                # Start streaming input mode
+                await client.query(self.message_generator())
+
+                # Process streaming responses
+                turn = 0
+                async for message in client.receive_messages():
+                    turn += 1
+
+                    if isinstance(message, AssistantMessage):
+                        # Clear "thinking" line if we printed it
+                        if self._current_streaming_text:
+                            self.ui.console.print()  # New line after streaming
+
+                        self._current_streaming_text = ""
+
+                        # Process message content blocks
+                        for block in message.content:
+                            if isinstance(block, TextBlock):
+                                # Stream text as it arrives
+                                self.ui.print_agent_text(block.text)
+                                self._current_streaming_text += block.text
+
+                                # Log assistant message
+                                self.storage.log("assistant_message", {
+                                    "turn": turn,
+                                    "text": block.text
+                                })
+
+                            elif isinstance(block, ToolUseBlock):
+                                # Show tool usage
+                                self.ui.print_tool_use(block.name)
+
+                    elif isinstance(message, ResultMessage):
+                        # Session completed (user exited or error)
+                        if message.is_error:
+                            self.ui.print_error(f"Agent error: {message.result}")
+                        else:
+                            self.ui.print_session_summary(
+                                duration_s=message.duration_ms / 1000 if message.duration_ms else 0,
+                                turns=message.num_turns,
+                                cost_usd=message.total_cost_usd
+                            )
+
+                        # Log session end
+                        self.storage.log("session_end", {
+                            "duration_ms": message.duration_ms,
+                            "cost_usd": message.total_cost_usd,
+                            "turns": message.num_turns,
+                            "success": not message.is_error
+                        })
+                        break
+
+        except KeyboardInterrupt:
+            self.ui.print_info("\nChat interrupted by user")
+
+        except Exception as e:
+            self.ui.print_error(f"Chat error: {e}")
+            raise
+
+        finally:
+            # Cleanup browser on exit
+            await BrowserManager.close_browser()
+            self.ui.print_info("Browser closed")

crawl4ai/agent/terminal_ui.py

@@ -0,0 +1,115 @@
+"""Terminal UI components using Rich for beautiful agent output."""
+
+from rich.console import Console
+from rich.markdown import Markdown
+from rich.syntax import Syntax
+from rich.panel import Panel
+from rich.live import Live
+from rich.spinner import Spinner
+from rich.text import Text
+from rich.prompt import Prompt
+from rich.rule import Rule
+
+
+class TerminalUI:
+    """Rich-based terminal interface for the Crawl4AI agent."""
+
+    def __init__(self):
+        self.console = Console()
+        self._current_text = ""
+
+    def show_header(self, session_id: str, log_path: str):
+        """Display agent session header."""
+        self.console.print()
+        self.console.print(Panel.fit(
+            "[bold cyan]🕷️  Crawl4AI Agent - Chat Mode[/bold cyan]",
+            border_style="cyan"
+        ))
+        self.console.print(f"[dim]📁 Session: {session_id}[/dim]")
+        self.console.print(f"[dim]💾 Log: {log_path}[/dim]")
+        self.console.print()
+
+    def show_commands(self):
+        """Display available commands."""
+        self.console.print("\n[dim]Commands:[/dim]")
+        self.console.print("  [cyan]/exit[/cyan] - Exit chat")
+        self.console.print("  [cyan]/clear[/cyan] - Clear screen")
+        self.console.print("  [cyan]/help[/cyan] - Show this help\n")
+
+    def get_user_input(self) -> str:
+        """Get user input with styled prompt."""
+        return Prompt.ask("\n[bold green]You[/bold green]")
+
+    def print_separator(self):
+        """Print a visual separator."""
+        self.console.print(Rule(style="dim"))
+
+    def print_thinking(self):
+        """Show thinking indicator."""
+        self.console.print("\n[cyan]Agent:[/cyan] [dim]thinking...[/dim]", end="")
+
+    def print_agent_text(self, text: str, stream: bool = False):
+        """
+        Print agent response text.
+
+        Args:
+            text: Text to print
+            stream: If True, append to current streaming output
+        """
+        if stream:
+            # For streaming, just print without newline
+            self.console.print(f"\r[cyan]Agent:[/cyan] {text}", end="")
+        else:
+            # For complete messages
+            self.console.print(f"\n[cyan]Agent:[/cyan] {text}")
+
+    def print_markdown(self, markdown_text: str):
+        """Render markdown content."""
+        self.console.print()
+        self.console.print(Markdown(markdown_text))
+
+    def print_code(self, code: str, language: str = "python"):
+        """Render code with syntax highlighting."""
+        self.console.print()
+        self.console.print(Syntax(code, language, theme="monokai", line_numbers=True))
+
+    def print_error(self, error_msg: str):
+        """Display error message."""
+        self.console.print(f"\n[bold red]Error:[/bold red] {error_msg}")
+
+    def print_success(self, msg: str):
+        """Display success message."""
+        self.console.print(f"\n[bold green]✓[/bold green] {msg}")
+
+    def print_info(self, msg: str):
+        """Display info message."""
+        self.console.print(f"\n[bold blue]ℹ[/bold blue] {msg}")
+
+    def clear_screen(self):
+        """Clear the terminal screen."""
+        self.console.clear()
+
+    def print_session_summary(self, duration_s: float, turns: int, cost_usd: float = None):
+        """Display session completion summary."""
+        self.console.print()
+        self.console.print(Panel(
+            f"[green]✅ Completed[/green]\n"
+            f"⏱ Duration: {duration_s:.2f}s\n"
+            f"🔄 Turns: {turns}\n"
+            + (f"💰 Cost: ${cost_usd:.4f}" if cost_usd else ""),
+            border_style="green"
+        ))
+
+    def print_tool_use(self, tool_name: str):
+        """Indicate tool usage."""
+        self.console.print(f"\n[dim]🔧 Using tool: {tool_name}[/dim]")
+
+    def with_spinner(self, text: str = "Processing..."):
+        """
+        Context manager for showing a spinner.
+
+        Usage:
+            with ui.with_spinner("Crawling page..."):
+                # do work
+        """
+        return self.console.status(f"[cyan]{text}[/cyan]", spinner="dots")

crawl4ai/agent/test_chat.py

@@ -0,0 +1,114 @@
+#!/usr/bin/env python
+"""Test script to verify chat mode setup (non-interactive)."""
+
+import sys
+import asyncio
+from pathlib import Path
+
+# Add parent to path for imports
+sys.path.insert(0, str(Path(__file__).parent.parent.parent))
+
+from crawl4ai.agent.browser_manager import BrowserManager
+from crawl4ai.agent.terminal_ui import TerminalUI
+from crawl4ai.agent.chat_mode import ChatMode
+from crawl4ai.agent.c4ai_tools import CRAWL_TOOLS
+from crawl4ai.agent.c4ai_prompts import SYSTEM_PROMPT
+
+from claude_agent_sdk import ClaudeAgentOptions, create_sdk_mcp_server
+
+
+class MockStorage:
+    """Mock storage for testing."""
+
+    def log(self, event_type: str, data: dict):
+        print(f"[LOG] {event_type}: {data}")
+
+    def get_session_path(self):
+        return "/tmp/test_session.jsonl"
+
+
+async def test_components():
+    """Test individual components."""
+
+    print("="*60)
+    print("CHAT MODE COMPONENT TESTS")
+    print("="*60)
+
+    # Test 1: BrowserManager
+    print("\n[TEST 1] BrowserManager singleton")
+    try:
+        browser1 = await BrowserManager.get_browser()
+        browser2 = await BrowserManager.get_browser()
+        assert browser1 is browser2, "Browser instances should be same (singleton)"
+        print("✓ BrowserManager singleton works")
+        await BrowserManager.close_browser()
+    except Exception as e:
+        print(f"✗ BrowserManager failed: {e}")
+        return False
+
+    # Test 2: TerminalUI
+    print("\n[TEST 2] TerminalUI rendering")
+    try:
+        ui = TerminalUI()
+        ui.show_header("test-123", "/tmp/test.log")
+        ui.print_agent_text("Hello from agent")
+        ui.print_markdown("# Test\nThis is **bold**")
+        ui.print_success("Test success message")
+        print("✓ TerminalUI renders correctly")
+    except Exception as e:
+        print(f"✗ TerminalUI failed: {e}")
+        return False
+
+    # Test 3: MCP Server Setup
+    print("\n[TEST 3] MCP Server with tools")
+    try:
+        crawler_server = create_sdk_mcp_server(
+            name="crawl4ai",
+            version="1.0.0",
+            tools=CRAWL_TOOLS
+        )
+        print(f"✓ MCP server created with {len(CRAWL_TOOLS)} tools")
+    except Exception as e:
+        print(f"✗ MCP Server failed: {e}")
+        return False
+
+    # Test 4: ChatMode instantiation
+    print("\n[TEST 4] ChatMode instantiation")
+    try:
+        options = ClaudeAgentOptions(
+            mcp_servers={"crawler": crawler_server},
+            allowed_tools=[
+                "mcp__crawler__quick_crawl",
+                "mcp__crawler__start_session",
+                "mcp__crawler__navigate",
+                "mcp__crawler__extract_data",
+                "mcp__crawler__execute_js",
+                "mcp__crawler__screenshot",
+                "mcp__crawler__close_session",
+            ],
+            system_prompt=SYSTEM_PROMPT,
+            permission_mode="acceptEdits"
+        )
+
+        ui = TerminalUI()
+        storage = MockStorage()
+        chat = ChatMode(options, ui, storage)
+        print("✓ ChatMode instance created successfully")
+    except Exception as e:
+        print(f"✗ ChatMode failed: {e}")
+        import traceback
+        traceback.print_exc()
+        return False
+
+    print("\n" + "="*60)
+    print("ALL COMPONENT TESTS PASSED ✓")
+    print("="*60)
+    print("\nTo test interactive chat mode, run:")
+    print("  python -m crawl4ai.agent.agent_crawl --chat")
+
+    return True
+
+
+if __name__ == "__main__":
+    success = asyncio.run(test_components())
+    sys.exit(0 if success else 1)

crawl4ai/agent/test_scenarios.py

@@ -0,0 +1,524 @@
+#!/usr/bin/env python
+"""
+Automated multi-turn chat scenario tests for Crawl4AI Agent.
+
+Tests agent's ability to handle complex conversations, maintain state,
+plan and execute tasks without human interaction.
+"""
+
+import asyncio
+import json
+import time
+from pathlib import Path
+from typing import List, Dict, Any, Optional
+from dataclasses import dataclass
+from enum import Enum
+
+from claude_agent_sdk import ClaudeSDKClient, ClaudeAgentOptions, create_sdk_mcp_server
+from claude_agent_sdk import AssistantMessage, TextBlock, ResultMessage, ToolUseBlock
+
+from .c4ai_tools import CRAWL_TOOLS
+from .c4ai_prompts import SYSTEM_PROMPT
+from .browser_manager import BrowserManager
+
+
+class TurnResult(Enum):
+    """Result of a single conversation turn."""
+    PASS = "PASS"
+    FAIL = "FAIL"
+    TIMEOUT = "TIMEOUT"
+    ERROR = "ERROR"
+
+
+@dataclass
+class TurnExpectation:
+    """Expectations for a single conversation turn."""
+    user_message: str
+    expect_tools: Optional[List[str]] = None  # Tools that should be called
+    expect_keywords: Optional[List[str]] = None  # Keywords in response
+    expect_files_created: Optional[List[str]] = None  # File patterns created
+    expect_success: bool = True  # Should complete without error
+    expect_min_turns: int = 1  # Minimum agent turns to complete
+    timeout_seconds: int = 60
+
+
+@dataclass
+class Scenario:
+    """A complete multi-turn conversation scenario."""
+    name: str
+    category: str  # "simple", "medium", "complex"
+    description: str
+    turns: List[TurnExpectation]
+    cleanup_files: Optional[List[str]] = None  # Files to cleanup after test
+
+
+# =============================================================================
+# TEST SCENARIOS - Categorized from Simple to Complex
+# =============================================================================
+
+SIMPLE_SCENARIOS = [
+    Scenario(
+        name="Single quick crawl",
+        category="simple",
+        description="Basic one-shot crawl with markdown extraction",
+        turns=[
+            TurnExpectation(
+                user_message="Use quick_crawl to get the title from example.com",
+                expect_tools=["mcp__crawler__quick_crawl"],
+                expect_keywords=["Example Domain", "title"],
+                timeout_seconds=30
+            )
+        ]
+    ),
+
+    Scenario(
+        name="Session lifecycle",
+        category="simple",
+        description="Start session, navigate, close - basic session management",
+        turns=[
+            TurnExpectation(
+                user_message="Start a session named 'simple_test'",
+                expect_tools=["mcp__crawler__start_session"],
+                expect_keywords=["session", "started"],
+                timeout_seconds=20
+            ),
+            TurnExpectation(
+                user_message="Navigate to example.com",
+                expect_tools=["mcp__crawler__navigate"],
+                expect_keywords=["navigated", "example.com"],
+                timeout_seconds=25
+            ),
+            TurnExpectation(
+                user_message="Close the session",
+                expect_tools=["mcp__crawler__close_session"],
+                expect_keywords=["closed"],
+                timeout_seconds=15
+            )
+        ]
+    ),
+]
+
+
+MEDIUM_SCENARIOS = [
+    Scenario(
+        name="Multi-page crawl with file output",
+        category="medium",
+        description="Crawl multiple pages and save results to file",
+        turns=[
+            TurnExpectation(
+                user_message="Crawl example.com and example.org, extract titles from both",
+                expect_tools=["mcp__crawler__quick_crawl"],
+                expect_min_turns=2,  # Should make 2 separate crawls
+                timeout_seconds=45
+            ),
+            TurnExpectation(
+                user_message="Save the results to a JSON file called crawl_results.json",
+                expect_tools=["Write"],
+                expect_files_created=["crawl_results.json"],
+                timeout_seconds=20
+            )
+        ],
+        cleanup_files=["crawl_results.json"]
+    ),
+
+    Scenario(
+        name="Session-based data extraction",
+        category="medium",
+        description="Use session to navigate and extract data in steps",
+        turns=[
+            TurnExpectation(
+                user_message="Start session 'extract_test', navigate to example.com, and extract the markdown",
+                expect_tools=["mcp__crawler__start_session", "mcp__crawler__navigate", "mcp__crawler__extract_data"],
+                expect_keywords=["Example Domain"],
+                timeout_seconds=50
+            ),
+            TurnExpectation(
+                user_message="Now save that markdown to example_content.md",
+                expect_tools=["Write"],
+                expect_files_created=["example_content.md"],
+                timeout_seconds=20
+            ),
+            TurnExpectation(
+                user_message="Close the session",
+                expect_tools=["mcp__crawler__close_session"],
+                timeout_seconds=15
+            )
+        ],
+        cleanup_files=["example_content.md"]
+    ),
+
+    Scenario(
+        name="Context retention across turns",
+        category="medium",
+        description="Agent should remember previous context",
+        turns=[
+            TurnExpectation(
+                user_message="Crawl example.com and tell me the title",
+                expect_tools=["mcp__crawler__quick_crawl"],
+                expect_keywords=["Example Domain"],
+                timeout_seconds=30
+            ),
+            TurnExpectation(
+                user_message="What was the URL I just asked you to crawl?",
+                expect_keywords=["example.com"],
+                expect_tools=[],  # Should answer from memory, no tools needed
+                timeout_seconds=15
+            )
+        ]
+    ),
+]
+
+
+COMPLEX_SCENARIOS = [
+    Scenario(
+        name="Multi-step task with planning",
+        category="complex",
+        description="Complex task requiring agent to plan, execute, and verify",
+        turns=[
+            TurnExpectation(
+                user_message="Crawl example.com and example.org, compare their content, and create a markdown report with: 1) titles of both, 2) word count comparison, 3) save to comparison_report.md",
+                expect_tools=["mcp__crawler__quick_crawl", "Write"],
+                expect_files_created=["comparison_report.md"],
+                expect_min_turns=3,  # Plan, crawl both, write report
+                timeout_seconds=90
+            ),
+            TurnExpectation(
+                user_message="Read back the report you just created",
+                expect_tools=["Read"],
+                expect_keywords=["Example Domain"],
+                timeout_seconds=20
+            )
+        ],
+        cleanup_files=["comparison_report.md"]
+    ),
+
+    Scenario(
+        name="Session with state manipulation",
+        category="complex",
+        description="Complex session workflow with multiple operations",
+        turns=[
+            TurnExpectation(
+                user_message="Start session 'complex_session' and navigate to example.com",
+                expect_tools=["mcp__crawler__start_session", "mcp__crawler__navigate"],
+                timeout_seconds=30
+            ),
+            TurnExpectation(
+                user_message="Extract the page content and count how many times the word 'example' appears (case insensitive)",
+                expect_tools=["mcp__crawler__extract_data"],
+                expect_keywords=["example"],
+                timeout_seconds=30
+            ),
+            TurnExpectation(
+                user_message="Take a screenshot of the current page",
+                expect_tools=["mcp__crawler__screenshot"],
+                expect_keywords=["screenshot"],
+                timeout_seconds=25
+            ),
+            TurnExpectation(
+                user_message="Close the session",
+                expect_tools=["mcp__crawler__close_session"],
+                timeout_seconds=15
+            )
+        ]
+    ),
+
+    Scenario(
+        name="Error recovery and continuation",
+        category="complex",
+        description="Agent should handle errors gracefully and continue",
+        turns=[
+            TurnExpectation(
+                user_message="Crawl https://this-site-definitely-does-not-exist-12345.com",
+                expect_success=False,  # Should fail gracefully
+                expect_keywords=["error", "fail"],
+                timeout_seconds=30
+            ),
+            TurnExpectation(
+                user_message="That's okay, crawl example.com instead",
+                expect_tools=["mcp__crawler__quick_crawl"],
+                expect_keywords=["Example Domain"],
+                timeout_seconds=30
+            )
+        ]
+    ),
+]
+
+
+# Combine all scenarios
+ALL_SCENARIOS = SIMPLE_SCENARIOS + MEDIUM_SCENARIOS + COMPLEX_SCENARIOS
+
+
+# =============================================================================
+# TEST RUNNER
+# =============================================================================
+
+class ScenarioRunner:
+    """Runs automated chat scenarios without human interaction."""
+
+    def __init__(self, working_dir: Path):
+        self.working_dir = working_dir
+        self.results = []
+
+    async def run_scenario(self, scenario: Scenario) -> Dict[str, Any]:
+        """Run a single scenario and return results."""
+        print(f"\n{'='*70}")
+        print(f"[{scenario.category.upper()}] {scenario.name}")
+        print(f"{'='*70}")
+        print(f"Description: {scenario.description}\n")
+
+        start_time = time.time()
+        turn_results = []
+
+        try:
+            # Setup agent options
+            crawler_server = create_sdk_mcp_server(
+                name="crawl4ai",
+                version="1.0.0",
+                tools=CRAWL_TOOLS
+            )
+
+            options = ClaudeAgentOptions(
+                mcp_servers={"crawler": crawler_server},
+                allowed_tools=[
+                    "mcp__crawler__quick_crawl",
+                    "mcp__crawler__start_session",
+                    "mcp__crawler__navigate",
+                    "mcp__crawler__extract_data",
+                    "mcp__crawler__execute_js",
+                    "mcp__crawler__screenshot",
+                    "mcp__crawler__close_session",
+                    "Read", "Write", "Edit", "Glob", "Grep", "Bash"
+                ],
+                system_prompt=SYSTEM_PROMPT,
+                permission_mode="acceptEdits",
+                cwd=str(self.working_dir)
+            )
+
+            # Run conversation
+            async with ClaudeSDKClient(options=options) as client:
+                for turn_idx, expectation in enumerate(scenario.turns, 1):
+                    print(f"\nTurn {turn_idx}: {expectation.user_message}")
+
+                    turn_result = await self._run_turn(
+                        client, expectation, turn_idx
+                    )
+                    turn_results.append(turn_result)
+
+                    if turn_result["status"] != TurnResult.PASS:
+                        print(f"  ✗ FAILED: {turn_result['reason']}")
+                        break
+                    else:
+                        print(f"  ✓ PASSED")
+
+            # Cleanup
+            if scenario.cleanup_files:
+                self._cleanup_files(scenario.cleanup_files)
+
+            # Overall result
+            all_passed = all(r["status"] == TurnResult.PASS for r in turn_results)
+            duration = time.time() - start_time
+
+            result = {
+                "scenario": scenario.name,
+                "category": scenario.category,
+                "status": "PASS" if all_passed else "FAIL",
+                "duration_seconds": duration,
+                "turns": turn_results
+            }
+
+            return result
+
+        except Exception as e:
+            print(f"\n✗ SCENARIO ERROR: {e}")
+            return {
+                "scenario": scenario.name,
+                "category": scenario.category,
+                "status": "ERROR",
+                "error": str(e),
+                "duration_seconds": time.time() - start_time,
+                "turns": turn_results
+            }
+        finally:
+            # Ensure browser cleanup
+            await BrowserManager.close_browser()
+
+    async def _run_turn(
+        self,
+        client: ClaudeSDKClient,
+        expectation: TurnExpectation,
+        turn_number: int
+    ) -> Dict[str, Any]:
+        """Execute a single conversation turn and validate."""
+
+        tools_used = []
+        response_text = ""
+        agent_turns = 0
+
+        try:
+            # Send user message
+            await client.query(expectation.user_message)
+
+            # Collect response
+            start_time = time.time()
+            async for message in client.receive_messages():
+                if time.time() - start_time > expectation.timeout_seconds:
+                    return {
+                        "turn": turn_number,
+                        "status": TurnResult.TIMEOUT,
+                        "reason": f"Exceeded {expectation.timeout_seconds}s timeout"
+                    }
+
+                if isinstance(message, AssistantMessage):
+                    agent_turns += 1
+                    for block in message.content:
+                        if isinstance(block, TextBlock):
+                            response_text += block.text + " "
+                        elif isinstance(block, ToolUseBlock):
+                            tools_used.append(block.name)
+
+                elif isinstance(message, ResultMessage):
+                    # Check if error when expecting success
+                    if expectation.expect_success and message.is_error:
+                        return {
+                            "turn": turn_number,
+                            "status": TurnResult.FAIL,
+                            "reason": f"Agent returned error: {message.result}"
+                        }
+                    break
+
+            # Validate expectations
+            validation = self._validate_turn(
+                expectation, tools_used, response_text, agent_turns
+            )
+
+            return {
+                "turn": turn_number,
+                "status": validation["status"],
+                "reason": validation.get("reason", "All checks passed"),
+                "tools_used": tools_used,
+                "agent_turns": agent_turns
+            }
+
+        except Exception as e:
+            return {
+                "turn": turn_number,
+                "status": TurnResult.ERROR,
+                "reason": f"Exception: {str(e)}"
+            }
+
+    def _validate_turn(
+        self,
+        expectation: TurnExpectation,
+        tools_used: List[str],
+        response_text: str,
+        agent_turns: int
+    ) -> Dict[str, Any]:
+        """Validate turn results against expectations."""
+
+        # Check expected tools
+        if expectation.expect_tools:
+            for tool in expectation.expect_tools:
+                if tool not in tools_used:
+                    return {
+                        "status": TurnResult.FAIL,
+                        "reason": f"Expected tool '{tool}' was not used"
+                    }
+
+        # Check keywords
+        if expectation.expect_keywords:
+            response_lower = response_text.lower()
+            for keyword in expectation.expect_keywords:
+                if keyword.lower() not in response_lower:
+                    return {
+                        "status": TurnResult.FAIL,
+                        "reason": f"Expected keyword '{keyword}' not found in response"
+                    }
+
+        # Check files created
+        if expectation.expect_files_created:
+            for pattern in expectation.expect_files_created:
+                matches = list(self.working_dir.glob(pattern))
+                if not matches:
+                    return {
+                        "status": TurnResult.FAIL,
+                        "reason": f"Expected file matching '{pattern}' was not created"
+                    }
+
+        # Check minimum turns
+        if agent_turns < expectation.expect_min_turns:
+            return {
+                "status": TurnResult.FAIL,
+                "reason": f"Expected at least {expectation.expect_min_turns} agent turns, got {agent_turns}"
+            }
+
+        return {"status": TurnResult.PASS}
+
+    def _cleanup_files(self, patterns: List[str]):
+        """Remove files created during test."""
+        for pattern in patterns:
+            for file_path in self.working_dir.glob(pattern):
+                try:
+                    file_path.unlink()
+                except Exception as e:
+                    print(f"  Warning: Could not delete {file_path}: {e}")
+
+
+async def run_all_scenarios(working_dir: Optional[Path] = None):
+    """Run all test scenarios and report results."""
+
+    if working_dir is None:
+        working_dir = Path.cwd() / "test_agent_output"
+        working_dir.mkdir(exist_ok=True)
+
+    runner = ScenarioRunner(working_dir)
+
+    print("\n" + "="*70)
+    print("CRAWL4AI AGENT SCENARIO TESTS")
+    print("="*70)
+    print(f"Working directory: {working_dir}")
+    print(f"Total scenarios: {len(ALL_SCENARIOS)}")
+    print(f"  Simple: {len(SIMPLE_SCENARIOS)}")
+    print(f"  Medium: {len(MEDIUM_SCENARIOS)}")
+    print(f"  Complex: {len(COMPLEX_SCENARIOS)}")
+
+    results = []
+    for scenario in ALL_SCENARIOS:
+        result = await runner.run_scenario(scenario)
+        results.append(result)
+
+    # Summary
+    print("\n" + "="*70)
+    print("TEST SUMMARY")
+    print("="*70)
+
+    by_category = {"simple": [], "medium": [], "complex": []}
+    for result in results:
+        by_category[result["category"]].append(result)
+
+    for category in ["simple", "medium", "complex"]:
+        cat_results = by_category[category]
+        passed = sum(1 for r in cat_results if r["status"] == "PASS")
+        total = len(cat_results)
+        print(f"\n{category.upper()}: {passed}/{total} passed")
+        for r in cat_results:
+            status_icon = "✓" if r["status"] == "PASS" else "✗"
+            print(f"  {status_icon} {r['scenario']} ({r['duration_seconds']:.1f}s)")
+
+    total_passed = sum(1 for r in results if r["status"] == "PASS")
+    total = len(results)
+
+    print(f"\nOVERALL: {total_passed}/{total} scenarios passed ({total_passed/total*100:.1f}%)")
+
+    # Save detailed results
+    results_file = working_dir / "test_results.json"
+    with open(results_file, "w") as f:
+        json.dump(results, f, indent=2)
+    print(f"\nDetailed results saved to: {results_file}")
+
+    return total_passed == total
+
+
+if __name__ == "__main__":
+    import sys
+    success = asyncio.run(run_all_scenarios())
+    sys.exit(0 if success else 1)

crawl4ai/agent/test_tools.py

@@ -0,0 +1,140 @@
+#!/usr/bin/env python
+"""Test script for Crawl4AI tools - tests tools directly without the agent."""
+
+import asyncio
+import json
+from crawl4ai import AsyncWebCrawler, BrowserConfig, CrawlerRunConfig, CacheMode
+
+async def test_quick_crawl():
+    """Test quick_crawl tool logic directly."""
+    print("\n" + "="*60)
+    print("TEST 1: Quick Crawl - Markdown Format")
+    print("="*60)
+
+    crawler_config = BrowserConfig(headless=True, verbose=False)
+    run_config = CrawlerRunConfig(cache_mode=CacheMode.BYPASS)
+
+    async with AsyncWebCrawler(config=crawler_config) as crawler:
+        result = await crawler.arun(url="https://example.com", config=run_config)
+
+        print(f"Success: {result.success}")
+        print(f"URL: {result.url}")
+
+        # Handle markdown - can be string or MarkdownGenerationResult object
+        if isinstance(result.markdown, str):
+            markdown_content = result.markdown
+        elif hasattr(result.markdown, 'raw_markdown'):
+            markdown_content = result.markdown.raw_markdown
+        else:
+            markdown_content = str(result.markdown)
+
+        print(f"Markdown type: {type(result.markdown)}")
+        print(f"Markdown length: {len(markdown_content)}")
+        print(f"Markdown preview:\n{markdown_content[:300]}")
+
+        return result.success
+
+
+async def test_session_workflow():
+    """Test session-based workflow."""
+    print("\n" + "="*60)
+    print("TEST 2: Session-Based Workflow")
+    print("="*60)
+
+    crawler_config = BrowserConfig(headless=True, verbose=False)
+
+    # Start session
+    crawler = AsyncWebCrawler(config=crawler_config)
+    await crawler.__aenter__()
+    print("✓ Session started")
+
+    try:
+        # Navigate to URL
+        run_config = CrawlerRunConfig(cache_mode=CacheMode.BYPASS)
+        result = await crawler.arun(url="https://example.com", config=run_config)
+        print(f"✓ Navigated to {result.url}, success: {result.success}")
+
+        # Extract data
+        if isinstance(result.markdown, str):
+            markdown_content = result.markdown
+        elif hasattr(result.markdown, 'raw_markdown'):
+            markdown_content = result.markdown.raw_markdown
+        else:
+            markdown_content = str(result.markdown)
+
+        print(f"✓ Extracted {len(markdown_content)} chars of markdown")
+        print(f"  Preview: {markdown_content[:200]}")
+
+        # Screenshot test - need to re-fetch with screenshot enabled
+        screenshot_config = CrawlerRunConfig(cache_mode=CacheMode.BYPASS, screenshot=True)
+        result2 = await crawler.arun(url=result.url, config=screenshot_config)
+        print(f"✓ Screenshot captured: {result2.screenshot is not None}")
+
+        return True
+
+    finally:
+        # Close session
+        await crawler.__aexit__(None, None, None)
+        print("✓ Session closed")
+
+
+async def test_html_format():
+    """Test HTML output format."""
+    print("\n" + "="*60)
+    print("TEST 3: Quick Crawl - HTML Format")
+    print("="*60)
+
+    crawler_config = BrowserConfig(headless=True, verbose=False)
+    run_config = CrawlerRunConfig(cache_mode=CacheMode.BYPASS)
+
+    async with AsyncWebCrawler(config=crawler_config) as crawler:
+        result = await crawler.arun(url="https://example.com", config=run_config)
+
+        print(f"Success: {result.success}")
+        print(f"HTML length: {len(result.html)}")
+        print(f"HTML preview:\n{result.html[:300]}")
+
+        return result.success
+
+
+async def main():
+    """Run all tests."""
+    print("\n" + "="*70)
+    print(" CRAWL4AI TOOLS TEST SUITE")
+    print("="*70)
+
+    tests = [
+        ("Quick Crawl (Markdown)", test_quick_crawl),
+        ("Session Workflow", test_session_workflow),
+        ("Quick Crawl (HTML)", test_html_format),
+    ]
+
+    results = []
+    for name, test_func in tests:
+        try:
+            result = await test_func()
+            results.append((name, result, None))
+        except Exception as e:
+            results.append((name, False, str(e)))
+
+    # Summary
+    print("\n" + "="*70)
+    print(" TEST SUMMARY")
+    print("="*70)
+
+    for name, success, error in results:
+        status = "✓ PASS" if success else "✗ FAIL"
+        print(f"{status} - {name}")
+        if error:
+            print(f"     Error: {error}")
+
+    total = len(results)
+    passed = sum(1 for _, success, _ in results if success)
+    print(f"\nTotal: {total} | Passed: {passed} | Failed: {total - passed}")
+
+    return all(success for _, success, _ in results)
+
+
+if __name__ == "__main__":
+    success = asyncio.run(main())
+    exit(0 if success else 1)