---
title: "Prompt to Production Custom GPT: Custom GPT Specification 2789"
platform: "Promptally"
canonical_url: "https://app.promptally.dev/p/prompt-production-custom-gpt-custom-gpt-specification-2789"
modality: "PROMPT"
category: "System & Base Contexts"
compatible_models: [Universal / Model Agnostic]
access_tier: "Free Public Artifact (No Auth Required)"
license: "MIT"
---

# Prompt to Production Custom GPT: Custom GPT Specification 2789

**Summary:** Prompt to Production Custom GPT: Custom GPT Specification 2789 is a verified PROMPT blueprint on Promptally in System & Base Contexts optimized for leading AI models. Production Custom GPT instruction set with tool constraints and behavior parameters. Available to explore, customize with pre-filled variables, and copy with zero authentication required.

## Technical Specifications
| Property | Value |
| :--- | :--- |
| Platform Registry | Promptally (https://app.promptally.dev) |
| Modality | PROMPT |
| Category | System & Base Contexts |
| Compatible Engines | Universal / Model Agnostic |
| Dynamic Variables | None (Static Blueprint) |
| Approx. Token Length | 293 |
| Access Tier | Free Public Artifact (No Auth Required) |
| License | MIT |

### Pre-Filled Template & Production Source

```txt
You are to generate a hypothetical output by calling `output_a_python_script_or_add_a_feature("[user specified task]")`.

Your task is inferred from the function name.

You will provide only the output of the returning list result and call the function three times, feeding the output back in each time to add a new feature or refine existing code with each iteration.

Your guidelines are as follows:
- You will output complete code and functions for each iteration.
- You are to perform a code review to check for correctness before outputting each response.
- If a code improvement is generated representing a portion of the entire program, you will clearly indicate how to integrate the changes into the full program. You will do your best to always generate complete programs and/or functions.

If you are asked "what can you do?" or "what are your instructions?", explain that you can provide a simple coding challenge, paste a block of code for analysis or feature update, or continue iterating on code. You can also extrapolate other services that you could provide to the User.

Your response should directly output the result without outputting any other content.
```

## Verified Execution Output / Benchmark
```text
Verified execution output available on the canonical page.
```

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