Agent Debugger

Debug AI agent issues systematically. Covers tool failures, infinite loops, context overflow, rate limits, and performance bottlenecks. Use when agents misbehave, loop infinitely, fail tools, hit limits, or produce unexpected outputs. Triggers on "debug", "fix agent", "agent stuck", "agent looping", "tool failed", "rate limit".

Systematic debugging for AI agent issues. When your agent misbehaves, this skill helps identify and fix the problem.

Common Agent Problems

1. Infinite Loops

Symptoms:

• Agent repeats same action
• Gets stuck in a pattern
• Never completes task

Diagnosis:

text

Agent log shows:
- Same tool called 10+ times
- Same output format repeated
- No progress between iterations

Fixes:

Add iteration limit:

json

{
  "maxIterations": 5,
  "onLimit": "ask_user"
}

Add explicit stop condition:

text

In your instructions, add:
"If you've tried the same approach 3 times without success, stop and ask the user for guidance."

2. Tool Failures

Symptoms:

• Tool returns error
• Tool times out
• Tool not found

Diagnosis:

text

Check:
- Tool exists in available_tools
- Parameters match tool schema
- Tool has required permissions
- Rate limits not exceeded

Fixes:

Validate parameters first:

python

# Before calling tool
required_params = tool.get("required", [])
for param in required_params:
    if param not in args:
        raise ValueError(f"Missing required parameter: {param}")

Add retry logic:

json

{
  "retries": 3,
  "retryDelay": 1000,
  "retryOn": ["rate_limit", "timeout", "5xx"]
}

3. Context Overflow

Symptoms:

• "Context length exceeded" error
• Agent forgets earlier conversation
• Truncated outputs

Diagnosis:

text

Check context window:
- Current tokens vs max tokens
- Number of messages in history
- Size of file contents loaded

Fixes:

Use memory efficiently:

text

- Load only relevant files
- Use offset/limit for large files
- Summarize long conversations
- Clear old context periodically

Compress context:

python

# Instead of full file
content = read("file.txt", offset=1, limit=100)

# Use memory_search for specific info
results = memory_search("important decision")

4. Rate Limiting

Symptoms:

• "Rate limit exceeded" error
• Requests blocked
• 429 status codes

Diagnosis:

text

Check:
- API rate limits (requests per minute/hour)
- Token limits (tokens per minute)
- Concurrent request limits
- Time until reset

Fixes:

Add backoff:

python

import time
import random

def call_with_backoff(func, max_retries=5):
    for attempt in range(max_retries):
        try:
            return func()
        except RateLimitError as e:
            wait = (2 ** attempt) + random.random()
            time.sleep(wait)
    raise Exception("Max retries exceeded")

Queue requests:

python

from queue import Queue
from threading import Thread

request_queue = Queue()

def process_queue():
    while True:
        task = request_queue.get()
        result = execute(task)
        request_queue.task_done()
        time.sleep(0.1)  # Rate limit: 10 req/s

5. Memory Issues

Symptoms:

• Agent doesn't remember previous context
• MEMORY.md not loaded
• Memory files not found

Diagnosis:

text

Check:
- MEMORY.md exists
- memory/ directory exists
- Files have correct permissions
- Memory loaded at startup

Fixes:

Verify memory setup:

bash

ls -la ~/.openclaw/workspace/
# Should show:
# MEMORY.md
# memory/

Add memory to instructions:

text

Before answering anything about prior work, decisions, dates, people, or todos: 
run memory_search on MEMORY.md + memory/*.md

6. Permission Errors

Symptoms:

• "Permission denied"
• "Access denied"
• Tools not working

Diagnosis:

text

Check:
- User permissions
- File permissions
- Tool policies
- Sandbox restrictions

Fixes:

Check file permissions:

bash

ls -la /path/to/file
chmod 600 ~/.openclaw/workspace/sensitive.json

Review tool policies:

json

{
  "tools": {
    "exec": {
      "security": "ask",  // or "allowlist" or "full"
      "ask": "on-miss"    // or "always" or "off"
    }
  }
}

7. Performance Issues

Symptoms:

• Slow responses
• Timeouts
• High resource usage

Diagnosis:

text

Profile the agent:
- Time each tool call
- Count tokens used
- Measure context growth
- Identify bottlenecks

Fixes:

Optimize context:

python

# Instead of loading entire file
content = read("large_file.txt", limit=50)

# Use targeted search
results = memory_search("specific topic")

Reduce tool calls:

text

# Bad: Multiple calls
file1 = read("file1.txt")
file2 = read("file2.txt")
file3 = read("file3.txt")

# Good: Parallel or combined
files = read(["file1.txt", "file2.txt", "file3.txt"])

Debugging Workflow

Step 1: Reproduce

text

1. Document exact steps to trigger issue
2. Note expected vs actual behavior
3. Check if issue is consistent or intermittent
4. Try with minimal example

Step 2: Isolate

text

1. Disable other skills
2. Reduce context to minimum
3. Simplify task
4. Test each component separately

Step 3: Diagnose

text

1. Check logs (if available)
2. Review tool outputs
3. Examine context window
4. Verify configuration

Step 4: Fix

text

1. Apply fix
2. Test fix
3. Document fix
4. Update instructions if needed

Step 5: Prevent

text

1. Add guardrails
2. Update error handling
3. Add logging
4. Document in memory

Debugging Tools

Check Agent Status

python

# If you have access to session tools
status = session_status()
print(f"Model: {status['model']}")
print(f"Tokens used: {status['usage']['total_tokens']}")
print(f"Reasoning: {status['reasoning']}")

Clear Context

text

If agent is stuck:
1. Start new session
2. Load only essential memory
3. Re-approach task fresh

Enable Verbose Mode

json

{
  "thinking": "verbose",
  "reasoning": "on"
}

This shows internal reasoning, helping identify where logic fails.

Common Error Messages

Error	Cause	Fix
context_length_exceeded	Too much context	Compress, summarize, limit
rate_limit_exceeded	Too many requests	Backoff, queue, wait
tool_not_found	Wrong tool name	Check spelling, install skill
permission_denied	Insufficient access	Check permissions, ask user
invalid_parameters	Wrong params	Validate against schema
timeout	Slow response	Increase timeout, optimize
memory_not_found	No memory files	Create MEMORY.md

Best Practices

1. Defensive Coding

python

# Always check before acting
if not os.path.exists(file):
    return "File not found"

try:
    result = risky_operation()
except ExpectedError:
    handle_error()

2. Progress Tracking

text

In agent instructions:
"Track your progress. After each major step, note what you've done and what's next."

3. Checkpointing

text

For long tasks:
- Save progress periodically
- Document current state
- Allow resuming from checkpoint

4. Logging

python

# Add to critical operations
log(f"Starting operation: {operation}")
log(f"Parameters: {params}")
log(f"Result: {result}")
log(f"Error: {error}")

When to Ask for Help

Ask the user when:

• Multiple fix attempts failed
• Issue is intermittent
• Would require destructive actions
• Need information only user has
• Configuration changes needed

Prevention Tips

1. Set limits early - max iterations, max tokens, max retries
2. Validate inputs - check parameters before calling tools
3. Handle errors gracefully - don't crash, report and adapt
4. Log important events - helps debugging later
5. Test edge cases - empty inputs, large files, special characters
6. Monitor resources - tokens, time, memory usage
7. Document quirks - save lessons in MEMORY.md