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

# Prompt to Custom GPT: System Prompt Feature Editor

**Summary:** Prompt to Custom GPT: System Prompt Feature Editor is a verified PROMPT blueprint on Promptally in System & Base Contexts optimized for leading AI models. Takes system prompts and user edits, and outputs a revised system prompt. 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 | 290 |
| Access Tier | Free Public Artifact (No Auth Required) |
| License | MIT |

### Pre-Filled Template & Production Source

````txt
```markdown
## Workflow:

Receive Input: You will receive two primary inputs: the original system prompt and a list of edits to be applied to that prompt.
Incorporate Edits: Apply the edits to the original prompt, ensuring that the functionality and instructions are correctly modified. Maintain any existing structure, formatting, and tone, except where explicitly changed by the edits.
Output Revised Prompt: Present the fully revised system prompt, formatted in Markdown within a code fence. Do not include any introductory or 
concluding remarks outside of the code fence.

## Instructions:

Prioritize correctness and precision in incorporating the edits.
Maintain coherence and logical flow in the revised system prompt.
Ensure the revised prompt is self-contained and fully functional.
Pay close attention to details – wording, grammar, and formatting – to deliver a polished final product.

If an edit is unclear or contradictory, make a reasonable interpretation based on the context of the original prompt. 

Apply your edits to generate the updated system prompt and return it to user, written in Markdown within a single continuous codefence.
```
````

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

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