n4nAI

Topic

Prompt Engineering for Agentic Systems

14 posts on prompt engineering for agentic systems — part of ai agents & automation on the n4n AI blog.

AI agents & automationAnalysis

System prompts vs tool descriptions: what guides agents

Practical analysis of system prompts vs tool descriptions: where to place agent policy and callable contracts, with real code examples, for portable LLM agents.

5 min read
AI agents & automationDefinition

ReAct prompting explained: reasoning plus acting

ReAct prompting interleaves reasoning with tool actions in an LLM loop. This guide explains the pattern, shows a Python implementation, and debunks myths.

4 min read
AI agents & automationHow-to

Prompting Claude Opus 4.5 for long-horizon agent tasks

Step-by-step guide to prompting Claude Opus 4.5 agents for long-horizon tasks: state schemas, tool contracts, loop control, and verification that holds.

3 min read
AI agents & automationGuide

How to structure multi-step instructions for AI agents

Practical guide to structuring multi-step instructions for AI agents: explicit steps, schemas, planner-executor pattern, failure handling, and testing.

4 min read
AI agents & automationHow-to

How to prompt agents to ask clarifying questions

Practical steps to prompt agents clarifying questions in production systems, with code patterns for intent detection, dialogue state, and verification.

3 min read
AI agents & automationHow-to

How to prompt agents for self-correction and retries

Learn how to prompt agents self-correction retries with structured feedback loops, explicit error handling, and runnable code for reliable LLM agents.

4 min read
AI agents & automationHow-to

How to prevent prompt drift in long agent conversations

Practical steps to stop prompt drift in long agent conversations: enforce system prompts, compress context, and verify with eval harness.

3 min read
AI agents & automationGuide

Few-shot examples in agent prompts: when they help

Practical guide to using few-shot examples agent prompts effectively in LLM agents, with code, pitfalls, and an actionable step-by-step path.

4 min read
AI agents & automationGuide

Designing prompts for multi-agent handoffs

Practical guide to designing prompts for multi-agent handoffs: structured contracts, sender/receiver prompts, authority boundaries, and testing patterns.

2 min read
AI agents & automationComparison

Chain-of-thought vs ReAct: which prompting style wins

A practical head-to-head comparison of chain-of-thought vs ReAct prompting across cost, latency, ergonomics, and real agentic use cases.

4 min read
AI agents & automationHow-to

Writing tool descriptions that AI agents actually follow

Learn how to write tool descriptions that AI agents reliably follow, with concrete schemas, code examples, and a test loop for function-calling systems.

4 min read
AI agents & automationHow-to

Writing prompts that reduce hallucinated tool calls

Practical prompt engineering techniques to reduce hallucinated tool calls prompting in LLM agents, with runnable code examples and verification steps.

4 min read
AI agents & automationHow-to

How to write system prompts for autonomous AI agents

Practical steps to engineer system prompts for autonomous agents, with tool contracts, error handling, and testable code for reliable agent behavior.

3 min read
AI agents & automationHow-to

How to prompt agents for reliable tool use

Practical steps to prompt agents for tool use reliably, with structured schemas, explicit policies, and verifiable code examples for engineers.

4 min read