# Prd To Plan

> Turn a PRD into a multi-phase implementation plan using tracer-bullet vertical slices, saved as a local Markdown file in ./plans/. Use when user wants to break down a PRD, create an implementation plan, plan phases from a PRD, or mentions "tracer bullets".

- **Type:** Skill
- **Install:** `agentstack add skill-tada5hi-skills-prd-to-plan`
- **Verified:** Yes — security-reviewed for prompt injection and unsafe behavior
- **Seller:** [tada5hi](https://agentstack.voostack.com/s/tada5hi)
- **Installs:** 0
- **Category:** [Content & Media](https://agentstack.voostack.com/c/content-and-media)
- **Latest version:** 0.1.0
- **License:** Apache-2.0
- **Upstream author:** [tada5hi](https://github.com/tada5hi)
- **Source:** https://github.com/tada5hi/skills/tree/master/skills/prd-to-plan

## Install

```sh
agentstack add skill-tada5hi-skills-prd-to-plan
```

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

## About

# PRD to Plan

Break a PRD into a phased implementation plan using vertical slices (tracer bullets). Output is a Markdown file in `./plans/`.

## Process

### 1. Confirm the PRD is in context

The PRD should already be in the conversation. If it isn't, ask the user to paste it or point you to the file.

### 2. Explore the codebase

If you have not already explored the codebase, do so to understand the current architecture, existing patterns, and integration layers.

### 3. Identify durable architectural decisions

Before slicing, identify high-level decisions that are unlikely to change throughout implementation:

- Route structures / URL patterns
- Database schema shape
- Key data models
- Authentication / authorization approach
- Third-party service boundaries

These go in the plan header so every phase can reference them.

### 4. Draft vertical slices

Break the PRD into **tracer bullet** phases. Each phase is a thin vertical slice that cuts through ALL integration layers end-to-end, NOT a horizontal slice of one layer.

- Each slice delivers a narrow but COMPLETE path through every layer (schema, API, UI, tests)
- A completed slice is demoable or verifiable on its own
- Prefer many thin slices over few thick ones
- Do NOT include specific file names, function names, or implementation details that are likely to change as later phases are built
- DO include durable decisions: route paths, schema shapes, data model names

### 5. Quiz the user

Present the proposed breakdown as a numbered list. For each phase show:

- **Title**: short descriptive name
- **User stories covered**: which user stories from the PRD this addresses

Ask the user:

- Does the granularity feel right? (too coarse / too fine)
- Should any phases be merged or split further?

Iterate until the user approves the breakdown.

### 6. Write the plan file

Create `./plans/` if it doesn't exist. Write the plan as a Markdown file named after the feature (e.g. `./plans/user-onboarding.md`). Use the template below.

# Plan: 

> Source PRD: 

## Architectural decisions

Durable decisions that apply across all phases:

- **Routes**: ...
- **Schema**: ...
- **Key models**: ...
- (add/remove sections as appropriate)

---

## Phase 1: 

**User stories**: 

### What to build

A concise description of this vertical slice. Describe the end-to-end behavior, not layer-by-layer implementation.

### Acceptance criteria

- [ ] Criterion 1
- [ ] Criterion 2
- [ ] Criterion 3

---

## Phase 2: 

**User stories**: 

### What to build

...

### Acceptance criteria

- [ ] ...

## Source & license

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

- **Author:** [tada5hi](https://github.com/tada5hi)
- **Source:** [tada5hi/skills](https://github.com/tada5hi/skills)
- **License:** Apache-2.0

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-tada5hi-skills-prd-to-plan
- Seller: https://agentstack.voostack.com/s/tada5hi
- 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%.