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Coding Agent Eval Harness Builder Playbook

Stand up a repeatable golden-task evaluation harness for your coding agent — define representative tasks, scoring criteria, CI wiring, and regression tracking in one structured playbook.

A 4-step agentic workflow pack for coding built to run with ChatGPT, Claude, and Gemini. Open the Markdown files, fill the variables, and paste into your model. Most buyers get a reviewable result in about 15 minutes.

  • Define golden tasks that expose real correctness, safety, and style gaps in your coding agent
  • Generate objective pass/fail and quality scoring criteria your whole team can apply consistently
  • Produce a concrete CI wiring plan so every agent change is measured against your task suite automatically
  • Build a regression-tracking dashboard spec that alerts when scores drop before you merge
  • Move from gut-feel agent reviews to evidence-based acceptance with a single structured workflow
CChatGPTClaudeClaudeGeminiGemini
promptscart.com / prompt-packs / agent-eval-harness-builder-playbook
Run in
ChatGPT · Claude +1
Your AI model
Step 1
Golden Task Designer
Feed in your agent's use cases and get a structured set of golden tasks, each with a clear input scenario, expected output, and acceptance criteria.
Step 2 · optional
Scoring Rubric Builder
Provide your golden tasks and get a weighted scoring rubric with explicit 1–5 criteria for correctness, safety, test coverage, and style.
Step 3 · optional
Harness Wiring Plan
Describe your CI environment and agent setup and receive a concrete wiring plan: trigger points, task runner shape, result capture schema, and failure modes.
Step 4 · optional
Regression Tracking Plan
Input your scoring rubric and harness setup and get a tracking plan: metrics to store, trend chart spec, alert thresholds, and escalation policy.
Output
Your deliverable
Copy-paste ready
One-time
$10
~5 hrs / week
time back

Prompt Customization Serviceoptional help adapting variables and output to your brand voice. Choose your tier at checkout (not tied to this prompt's price).

Instant download after payment
Refund as per the Refund Policy.
Email Support · 24h SLA
Lifetime updates

Models supported
C ChatGPTClaude ClaudeGemini Gemini
Best valueSave $786
Get this pack + 101 more in the Lifetime Bundle

This pack is $10 on its own. Buying every pack separately costs $935. The Lifetime Bundle is $149 one-time — you save $786 (84% off) and unlock every future pack free.

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Download Coding Agent Eval Harness Builder Playbook

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What ships with your purchase

Prompt files

Plain Markdown files with `{{variables}}` you fill in, ready to paste into ChatGPT, Claude, or Gemini. No setup, no tooling required.

Usage guide

Variable reference, model compatibility, examples, and customization tips so you can adapt the pack to your brand voice.

Lifetime updates

When we improve the pack, you get the new version automatically. Email support included with every purchase.

Models tested: ChatGPT, Claude, Gemini.

The workflow inside this pack

4 composable prompts you run in order — each one picks up where the last left off.

  1. Step 1

    Golden Task Designer

    Feed in your agent's use cases and get a structured set of golden tasks, each with a clear input scenario, expected output, and acceptance criteria.

  2. Step 2 · optional

    Scoring Rubric Builder

    Provide your golden tasks and get a weighted scoring rubric with explicit 1–5 criteria for correctness, safety, test coverage, and style.

  3. Step 3 · optional

    Harness Wiring Plan

    Describe your CI environment and agent setup and receive a concrete wiring plan: trigger points, task runner shape, result capture schema, and failure modes.

  4. Step 4 · optional

    Regression Tracking Plan

    Input your scoring rubric and harness setup and get a tracking plan: metrics to store, trend chart spec, alert thresholds, and escalation policy.

Perpetual (lifetime) use license

Your one-time purchase includes an ongoing right to use this prompt pack with the AI tools and models you control for your own and your clients' work — not for resale or public redistribution of the files as a product.

We keep the copyright

The prompt files, guides, examples, and bundled assets stay our copyrighted works (or our licensors'). Payment grants the limited license in our Terms only — it does not transfer ownership.

Need help adapting this prompt to your team? Add Prompt Customization Service at checkout.

FAQ

How long does it take to use Coding Agent Eval Harness Builder Playbook?
Most buyers finish in a few minutes: open the prompt file, fill the variables, and paste into your model. The first run is the slowest because you decide variable values; reuse is instant.
What if I get stuck?
Email support@promptscart.com. Free basic support is included with every purchase, and you'll get a reply from our team within 24 hours. If you need help adapting variables or output, we can schedule a call.
Do I need a paid plan with ChatGPT?
The prompt works on free tiers of ChatGPT, Claude, and Gemini. Heavy use can hit free-tier limits; paid plans get longer context and faster responses, but the prompt itself is the value.
Can I customize the prompt?
Yes, completely. You own the prompt files: edit the role framing, add variables, swap output sections, fork it to match your brand voice. Support can help you plan customizations over email.
What if it doesn't work for me?
Refund as per our Refund Policy (https://promptscart.com/refund-policy). Or add Prompt Customization Service at checkout for help adapting variables and output to your workflow.