# Reprompt

> Formats input into Goal, Constraints, Format, Failure structure. Also use when the user says "refine this prompt," "improve my prompt," "GCFF," "structure this prompt," "reprompt," or "make this prompt better." For full feature specs, see plan-feature.

- **Type:** Skill
- **Install:** `agentstack add skill-im5tu-claude-reprompt`
- **Verified:** Yes — security-reviewed for prompt injection and unsafe behavior
- **Seller:** [Im5tu](https://agentstack.voostack.com/s/im5tu)
- **Installs:** 0
- **Category:** [Agent Skills](https://agentstack.voostack.com/c/agent-skills)
- **Latest version:** 0.1.0
- **License:** MIT
- **Upstream author:** [Im5tu](https://github.com/Im5tu)
- **Source:** https://github.com/Im5tu/claude/tree/main/skills/reprompt
- **Website:** https://codewithstu.tv

## Install

```sh
agentstack add skill-im5tu-claude-reprompt
```

Requires the [AgentStack CLI](https://agentstack.voostack.com/docs/cli). Works with Claude Code, Cursor, and any MCP-compatible agent.

## About

# Reprompt — GCFF Prompt Builder

You are building a structured prompt using the GCFF format. GCFF stands for:

- **Goal** — What the user wants to achieve
- **Constraints** — Boundaries, limitations, or rules that must be respected
- **Format** — The desired output format (e.g., markdown table, bullet list, JSON)
- **Failure** — What constitutes a failed or unacceptable result

## Instructions

1. Read the user's original argument carefully. Extract any information that maps to one of the four GCFF fields.
2. For any field that is **not clearly covered** by the user's input, ask the user directly. All 4 fields are required.
3. Once all fields are gathered, output the formatted GCFF prompt to the chat.

## Output Format

Each field can be a single line or multiple list items prefixed with `- `:

```
Goal: 
Constraints:
- 
- 
Format: 
Failure:
- 
- 
```

## Example

Given input: *"Find directory sites for SEO backlinks that are free to join"*

Output:

```
Goal: Identify as many directory sites as possible that provide high traffic and/or dofollow links.
Constraints:
- Must be able to freely register on the site or minimal verification
Format: Markdown table of site name, description, link
Failure:
- Directory site requires payment to list
- Directory site is known spam
```

## Source & license

This open-source skill is cataloged on AgentStack and links to its original source — we do not rehost the code.

- **Author:** [Im5tu](https://github.com/Im5tu)
- **Source:** [Im5tu/claude](https://github.com/Im5tu/claude)
- **License:** MIT
- **Homepage:** https://codewithstu.tv

Install and usage instructions live in the source repository linked above.

## Pricing

- **Free** — Free

## Security capabilities

Automated source analysis of v0.1.0 — what this tool can access:

- **Network access:** no
- **Filesystem access:** no
- **Shell / process execution:** no
- **Environment & secrets:** no
- **Dynamic code execution:** no

*"Yes" means the capability is present in the source — more access means more to trust, not that it is unsafe.*


## Versions

- **0.1.0** — security scan: passed — Imported from the upstream source.

## Links

- Listing page: https://agentstack.voostack.com/l/skill-im5tu-claude-reprompt
- Seller: https://agentstack.voostack.com/s/im5tu
- Browse the marketplace: https://agentstack.voostack.com/browse

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Listed on AgentStack — the marketplace for AI agent skills and MCP servers. Every listing is security-reviewed. Creators keep 70%.