Detailed Feature Specification Document Generator

What it does

This prompt instructs the AI to produce a structured feature specification document for a proposed product capability, using the provided inputs (feature idea, target users, key functionalities, technical considerations, and estimated effort). The resulting output is a clear, implementation-ready spec organized into standard sections—overview, goals with success metrics, user stories, acceptance criteria tied to each story, a high-level technical design addressing architecture and nonfunctional needs, and future enhancements—so teams can align on scope and begin development.

For more installation instructions go to https://raw.githubusercontent.com/BetterPromptme/skills/refs/heads/main/betterprompt/SKILL.md to check out this skill.

Inputs

textInputs

Pass each text input using --input <key>=<value> flags.

Models and options

This skill's modality is: text.

To discover which model values you can use (and which options keys/values are valid for each model), run:

betterprompt resources --models-only --json

Then filter the returned JSON array to entries where modality is "text".

How to run

Step 1: Collect inputs

First, run betterprompt resources --models-only --json and filter to modality: "text" to discover valid models and available options:

betterprompt resources --models-only --json

Use only the models and option values that appear in the filtered results.

Then collect all inputs from the human:

• Required text inputs:
  • Feature_Idea
  • Target_Users
  • Key_Functionalities
  • Technical_Considerations
  • Estimated_Development_Effort
• Optional: model and options.
  • Present the human with the default model gpt-4.1-mini and its available options. Look up gpt-4.1-mini in the betterprompt resources output (filtered to modality "text") and show its availableOptions as: key: val1, val2 (default), val3 | key2: .... Mark a value (default) if it matches these defaults: {}.
  • If the human does not specify, defaults are used: model gpt-4.1-mini, options {}. Other models from the resources call are also available.

If any required text input is missing, ask the human for what's missing. Do not assume or fabricate values.

Step 2: Run via BetterPrompt CLI

Use the frontmatter's name as the positional argument (for this skill, use detailed-feature-specification-document-generator).

Command form:

betterprompt generate detailed-feature-specification-document-generator \
  [--input <key>=<value>] \
  [--model <model>] \
  [--options <options JSON>] \
  [--json]

Notes:

• Pass each text input as a separate --input <key>=<value> flag.
• If the human does not mention a model, omit --model and BetterPrompt will use the default model: gpt-4.1-mini.
• If the human does not mention options, omit --options and BetterPrompt will use the default options: {}.
• If the run times out, the response will include a runId you can use to fetch the result later.

Example (using defaults shown above):

betterprompt generate detailed-feature-specification-document-generator \
  --input Feature_Idea=<value> \
  --input Target_Users=<value> \
  --input Key_Functionalities=<value> \
  --input Technical_Considerations=<value> \
  --input Estimated_Development_Effort=<value> \
  --model gpt-4.1-mini \
  --options '{}'