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Blog — AI Prompts & Prompt Engineering — Page 2 | 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

Coding with AI

AI Prompts for CSS and Styling

Why does AI-generated CSS look right until you resize the window? Learn AI prompts for CSS and styling, torn down from fragile to responsive and maintainable.

September 10, 2026·8 min read

Coding with AI

AI Prompts for Writing Regex

Picture a regex that passed your test cases and quietly failed on real data. This case study shows AI prompts for writing regex that hold up outside the sample set.

September 10, 2026·8 min read

AI Prompts for Writing Automation Scripts

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Coding with AI

AI Prompts for Writing Automation Scripts

Developers lose about 30% of their week to repetitive tasks a script could handle. Learn AI prompts for writing automation scripts that are safe, reliable, and reusable.

September 10, 2026·8 min read

AI Harness

Managing Prompt Templates Across a Harness Codebase

Four divergent copies of one prompt caused a two-day bug. Harness prompt templates management makes prompts versioned, tested, single-source artifacts instead of scattered strings.

September 10, 2026·8 min read

AI Harness

How to Open-Source Your Agent Harness

An agent harness isn't an ordinary library — it's security-sensitive infra tangled with your secrets. Release an open source agent harness without leaking a key or shipping unusable code.

September 10, 2026·8 min read

AI Harness

Error Taxonomy: Classifying Harness Failures

When every failure looks the same, you can't retry, route, or alert correctly. Agent harness error classification gives failures types that drive real behavior.

September 10, 2026·8 min read

AI Harness

Building a CLI Around Your Agent Harness

A useful agent nobody could run became one everyone uses — the fix was a real agent harness cli with stdin, clean stdout, and meaningful exit codes.

September 10, 2026·8 min read

AI Harness

Handling Streaming Tool Calls in the Harness

Model tool calls arrive as partial fragments, not complete blocks. Harness streaming tool calls is the art of buffering, assembling, and validating them before you execute.

September 10, 2026·8 min read

AI Harness

Deterministic Replay for Harness Debugging

An agent bug you can't reproduce is a bug you can't fix. Harness deterministic replay records every non-deterministic result and replays a run byte-for-byte on demand.

September 9, 2026·9 min read

AI Harness

How to Benchmark Two Harnesses Head-to-Head

Success rate alone hides cost and picks wrong. A proper agent harness benchmark runs many trials, measures cost per success, and isolates the harness from the model.

September 9, 2026·8 min read

AI Harness

Instrumenting a Harness With OpenTelemetry

An agent run is already shaped like a trace. Agent harness opentelemetry turns an undebuggable multi-service run into a span-by-span tree you can inspect in minutes.

September 9, 2026·8 min read

AI Harness

Building a Dry-Run Mode for Your Harness

See exactly what an agent would do before it touches production. An agent harness dry run runs the full loop, simulates mutating tools, and hands you the plan to review.

September 9, 2026·8 min read