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Blog — AI Prompts & Prompt Engineering — Page 8 | PromptABCD

AI Prompts & Prompt Engineering

Practical guides, templates, and tips for Claude, ChatGPT, Gemini, and beyond.

All Agent Loop Engineering AI Agents AI Harness AI Writing Autonomous AI Agents ChatGPT Prompts Claude Prompts CLI AI Agents Cloud AI Agents Coding with AI Gemini Prompts Marketing & Copywriting Multi-Agent Systems Productivity Prompt Engineering

AI Harness

Building a Harness That Swaps Models Easily

A model agnostic agent harness turns a week-long provider rewrite into an afternoon. Learn the adapter pattern and why portable code doesn't mean portable behavior.

September 1, 2026·8 min read

AI Harness

Measuring Pass@k for AI Agents (and Why It Misleads)

A pass at k agent eval can hide terrible single-attempt reliability. A case study on shipping a 90% pass@5 agent that failed half its first tries in production.

August 31, 2026·8 min read

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AI Harness

Golden Datasets for Agent Evaluation, Done Right

An agent golden dataset is only as good as its governance. Learn to build curated, human-reviewed input-output pairs and review every golden change like code.

August 31, 2026·8 min read

AI Harness

Recording and Replaying Agent Sessions for Debugging

An agent session replay harness reproduces a one-time production bug on demand. Learn to record model and tool I/O once, then replay it deterministically.

August 31, 2026·8 min read

AI Harness

Mocking Tools in Your Agent Test Harness

Mock tools agent testing keeps your suite fast, safe, and free of real side effects. Learn to key mocks to arguments, record real responses, and test failures.

August 31, 2026·8 min read

AI Harness

How to Run Repeatable Agent Tests Without the Flakes

Repeatable agent testing means pinning the three sources of nondeterminism. A case study on going from 47% flaky CI to reliably green by freezing all three.

August 31, 2026·8 min read

AI Harness

The SWE-bench Harness Explained for Agent Builders

The swe-bench harness fails logically correct patches when the environment is wrong. Learn how it grades, what FAIL_TO_PASS means, and how to run it yourself.

August 28, 2026·8 min read

AI Harness

Building an Evaluation Harness for Your Agent

The best way to build agent eval harness infrastructure isn't LLM-as-judge. Learn to design verifiable tasks and programmatic graders you can actually trust.

August 28, 2026·8 min read

AI Harness

What Is an Eval Harness, and Why Do Agents Need One?

An AI eval harness tells you your agent works across a hundred tasks, not just the one you tried. Learn what it measures and why agents need it more than models.

August 28, 2026·8 min read

AI Harness

Logging and Tracing in an Agent Harness: A Case Study

Agent harness logging that only captures the final answer can't debug anything. A case study on structured, trace-ID'd per-step logging that found the bug fast.

August 28, 2026·9 min read

AI Harness

How to Add Timeouts to Every Tool in the Harness

A single hung tool can burn more budget than a thousand good calls. Learn to add a harness tool timeout to every call, with process-group killing done right.

August 28, 2026·9 min read

AI Harness

Retry Logic in an AI Harness: Safe by Default

Naive agent harness retry logic double-charges cards. Learn to classify errors, respect idempotency, and use keys so a lost response never runs twice.

August 28, 2026·9 min read