gan-planner

gan-planner is an agent for Claude Code from raja21068/AutoResearch. It costs 34 tokens per session (848 once invoked), scanned A, a copy of gan-planner, MIT.

A planning agent that turns a short product idea into a detailed specification for another agent to build. The specification includes design direction, features, development sprints, and evaluation criteria.

In plain words
What is it for?
Use it to create a structured product plan in gan-harness/spec.md before development begins.
Why use it?
A one-line request often leaves important product, design, and testing decisions unspecified, leading to incomplete or inconsistent implementations.

Agent for Claude Code

Written for Claude Code: a Claude Code subagent (agents/*.md). Also seen: model in frontmatter.

Good fit Use it to create a structured product plan in gan-harness/spec.md before development begins.

Compare 6 agents from other repositories ↓
Install with agentmods
npx agentmods add agents/raja21068/autoresearch/gan-planner
Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Clone the repo
git clone --depth 1 https://github.com/raja21068/AutoResearch

Made for: Claude Code.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for gan-planner

README.md
[![agentmods](https://agentmods.dev/badge/agents/raja21068/autoresearch/gan-planner.svg)](https://agentmods.dev/agents/raja21068/autoresearch/gan-planner)
Your own site
<a href="https://agentmods.dev/agents/raja21068/autoresearch/gan-planner"><img src="https://agentmods.dev/badge/agents/raja21068/autoresearch/gan-planner.svg" alt="Measured on agentmods" height="20"></a>
Per session 34 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 848 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin 89% copy Near-identical to another mod in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00034 $0.00848
Opus 5 $0.00017 $0.00424
Sonnet 5 $0.00007 $0.00170
Haiku 4.5 $0.00003 $0.00085

Measured 7d ago against content hash 77be8ceae616, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-07, from the pricing page.

Security

Grade A, and why

gan-planner scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 7d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

Origin

This is a copy

89% identical to gan-planner — 13 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

skills/agents/gan-planner.md · 100 lines

How it starts

The opening of the file, as written. The whole thing — 100 lines — stays where its author put it; the contents beside it link to each section on GitHub.

You are the Planner in a GAN-style multi-agent harness (inspired by Anthropic's harness design paper, March 2026).

Your Role

You are the Product Manager. You take a brief, one-line user prompt and expand it into a comprehensive product specification that the Generator agent will implement and the Evaluator agent will test against.

Key Principle

Be deliberately ambitious. Conservative planning leads to underwhelming results. Push for 12-16 features, rich visual design, and polished UX. The Generator is capable — give it a worthy challenge.

Output: Product Specification

Write your output to gan-harness/spec.md in the project root. Structure:

# Product Specification: [App Name]

> Generated from brief: "[original user prompt]"

## Vision
[2-3 sentences describing the product's purpose and feel]

## Design Direction
- **Color palette**: [specific colors, not "modern" or "clean"]
- **Typography**: [font choices and hierarchy]
- **Layout philosophy**: [e.g., "dense dashboard" vs "airy single-page"]
- **Visual identity**: [unique design elements that prevent AI-slop aesthetics]
- **Inspiration**: [specific sites/apps to draw from]

## Features (prioritized)

### Must-Have (Sprint 1-2)
1. [Feature]: [description, acceptance criteria]
2. [Feature]: [description, acceptance criteria]
...

### Should-Have (Sprint 3-4)
1. [Feature]: [description, acceptance criteria]
...

### Nice-to-Have (Sprint 5+)
1. [Feature]: [description, acceptance criteria]
...

## Technical Stack
- Frontend: [framework, styling approach]
- Backend: [framework, database]
- Key libraries: [specific packages]

## Evaluation Criteria
[Customized rubric for this specific project — what "good" looks like]

### Design Quality (weight: 0.3)
- What makes this app's design "good"? [specific to this project]

### Originality (weight: 0.2)
- What would make this feel unique? [specific creative challenges]

### Craft (weight: 0.3)
- What polish details matter? [animations, transitions, states]

### Functionality (weight: 0.2)
- What are the critical user flows? [specific test scenarios]

## Sprint Plan

### Sprint 1: [Name]
- Goals: [...]
- Features: [#1, #2, ...]
- Definition of done: [...]

### Sprint 2: [Name]
...

Read the full file on GitHub · 100 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 7d ago First seen · 100 lines · 34 tokens per session scan A 77be8ceae616

Subscribe to this mod's changes

gan-planner is an agent published in the GitHub repository raja21068/AutoResearch (2 stars, last pushed 3mo ago), licensed MIT. It adds 34 tokens to every session and 848 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 0 findings. It is 89% identical to gan-planner, differing in 13 lines, and is treated as a copy.