Autonomous Agents

# Autonomous Agents

Autonomous agents are AI systems that can independently decompose goals,
plan actions, execute tools, and self-correct without constant human guidance.
The challenge isn't making them capable - it's making them reliable. Every
extra decision multiplies failure probability.

This skill covers agent loops (ReAct, Plan-Execute), goal decomposition,
reflection patterns, and production reliability. Key insight: compounding
error rates kill autonomous agents. A 95% success rate per step drops to
60% by step 10. Build for reliability first, autonomy second.

2025 lesson: The winners are constrained, domain-specific agents with clear
boundaries, not "autonomous everything." Treat AI outputs as proposals,
not truth.

## Principles

- Reliability over autonomy - every step compounds error probability
- Constrain scope - domain-specific beats general-purpose
- Treat outputs as proposals, not truth
- Build guardrails before expanding capabilities
- Human-in-the-loop for critical decisions is non-negotiable
- Log everything - every action must be auditable
- Fail safely with rollback, not silently with corruption

## Capabilities

- autonomous-agents
- agent-loops
- goal-decomposition
- self-correction
- reflection-patterns
- react-pattern
- plan-execute
- agent-reliability
- agent-guardrails

## Scope

- multi-agent-systems → multi-agent-orchestration
- tool-building → agent-tool-builder
- memory-systems → agent-memory-systems
- workflow-orchestration → workflow-automation

## Tooling

### Frameworks

- LangGraph - When: Production agents with state management Note: 1.0 released Oct 2025, checkpointing, human-in-loop
- AutoGPT - When: Research/experimentation, open-ended exploration Note: Needs external guardrails for production
- CrewAI - When: Role-based agent teams Note: Good for specialized agent collaboration
- Claude Agent SDK - When: Anthropic ecosystem agents Note: Computer use, tool execution

### Patterns

- ReAct - When: Reasoning + Acting in alternating steps Note: Foundation for most modern agents
- Plan-Execute - When: Separate planning from execution Note: Better for complex multi-step tasks
- Reflection - When: Self-evaluation and correction Note: Evaluator-optimizer loop

## Patterns

### ReAct Agent Loop

Alternating reasoning and action steps

**When to use**: Interactive problem-solving, tool use, exploration

# REACT PATTERN:

"""
The ReAct loop:
1. Thought: Reason about what to do next
2. Action: Choose and execute a tool
3. Observation: Receive result
4. Repeat until goal achieved

Key: Explicit reasoning traces make debugging possible
"""

## Basic ReAct Implementation
"""
from langchain.agents import create_react_agent
from langchain_openai import ChatOpenAI

# Define the ReAct prompt template
react_prompt = '''
Answer the question using the following format:

Question: the input question
Thought: reason about what to do
Action: tool_name
Action Input: input to the tool
Observation: result of the action
... (repeat Thought/Action/Observation as needed)
Thought: I now know the final answer
Final Answer: the answer
'''

# Create the agent
agent = create_react_agent(
    llm=ChatOpenAI(model="gpt-4o"),
    tools=tools,
    prompt=react_prompt,
)

# Execute with step limit
result = agent.invoke(
    {"input": query},
    config={"max_iterations": 10}  # Prevent runaway loops
)
"""

## LangGraph ReAct (Production)
"""
from langgraph.prebuilt import create_react_agent
from langgraph.checkpoint.postgres import PostgresSaver

# Production checkpointer
checkpointer = PostgresSaver.from_conn_string(