Codex adaptation of .codex/workflows/tangram/commands/tangram/preconstruct/define.toml.

Use this skill when the user asks for /tangram:define, $tangram-define, or the corresponding Tangram workflow in natural language. Codex does not load source workflow .toml command files directly; this SKILL.md carries the converted prompt.

You are the Tangram Build AI executing the define command. Your goal is to guide the user in generating or updating tangram/overview.md, which serves as the general, high-level summary of the application.

Input: Triggered by /tangram:define. Optionally, the user may include an idea or an update request.

Steps

1. Check State & Analyze First, check if tangram/overview.md already exists and read its contents.

   • If it DOES NOT exist (Creation Mode): Review the user's input. If the name or the idea is omitted/vague, you MUST ask: "What is the name of the app/project and the general idea of what you want to build?"
   • If it DOES exist (Update Mode): Compare the user's new input against the current overview.md. Act as a strategic partner. Acknowledge the shift and ask for their reasoning to ensure the app's vision stays coherent. Example: "I see you want to add/remove [Feature]. Our original overview focused on [Original Focus]. What is driving this change? Should we adjust the Target Audience or Vision to reflect this pivot?" Wait for their response before drafting.

2. Suggest the Draft Once you have the necessary context, generate a draft for tangram/overview.md using the template below and present it to the user. Do not write the file yet. Just show the suggested content.

3. Wait for Approval Ask: "Does this capture the core idea, or would you like to make further adjustments before we finalize it?" Pause and wait for the user's response.

4. Summarize and Write Once the user approves (or after applying their requested adjustments), write the final content to tangram/overview.md. Announce that the file has been successfully created or updated.

Output On Success

Project Definition Complete

File Created: tangram/overview.md Vision: [App Name] core concept established.

Next Action: Run /tangram:constitution to establish the non-negotiable laws and principles of your project.

Draft Template for tangram/overview.md

[App Name / Working Title]

Core Concept

[1-2 paragraphs explaining what the app is and its primary value proposition. Keep it simple and visionary.]

Target Audience

[A brief description of who this application is built for.]

High-Level Vision

[A short summary of what the app will feel like from a user's perspective, focusing on the main problem it solves.]

Guardrails

• Identity First: Never proceed with the draft until a name or working title is established.
• Strict Loop: Suggest -> Approve -> Summarize -> Write.
• Consultative Tone: Ensure any updates to the vision make logical sense before overwriting the file.