| name | prd-methodology |
| description | PRP (Product Requirement Prompt) methodology for writing PRDs. Reference for best practices in structuring requirements documents for coding agents.
|
PRP Methodology — Quick Reference
The PRP (Product Requirement Prompt) framework is a structured process for creating PRDs that coding agents can execute in a single pass.
Core Principle
A PRD must contain ALL context needed for implementation. If a fresh Claude session with only the PRD can't build the feature correctly, the PRD is incomplete.
The 3-Step Process
- Write initial description — Brain dump what you want: feature, tech stack, constraints, integrations, examples, documentation references
- Generate the PRD — Research the codebase + web, interview the user, produce a structured document following the base template
- Execute the PRD — Clear context, start fresh, implement from the PRD alone
What Makes a Good PRD
DO:
- Reference specific files and code patterns from the codebase
- Write testable validation criteria ("returns 401 on invalid token")
- Include explicit non-goals to prevent scope creep
- List anti-patterns specific to the project
- Order implementation steps by dependency (what must exist before what)
- Include migration strategy for existing data/behavior
DON'T:
- Use vague validation criteria ("works well", "is performant")
- Leave technical design abstract ("use appropriate data structures")
- Assume the implementing agent knows project conventions — spell them out
- Skip the non-goals section — agents will over-build without boundaries
- Write steps that can't be verified independently
Interview Technique
The most valuable part of PRD generation is the interview. Goal: reduce assumptions to near zero.
- Ask at least 8-10 questions before writing
- Batch questions in groups of 3-4
- Provide recommended answers based on codebase research
- Cover: scope, users, technical constraints, data model, compatibility, edge cases, testing, anti-patterns
- Final question: "What else should I know that I haven't asked about?"
Validation Criteria Standards
Every criterion must be:
- Specific: "Login with wrong password returns 401" not "error handling works"
- Testable: Can be verified by running a command or checking output
- Independent: Each criterion can be checked on its own
- Complete: Cover happy path, edge cases, backward compatibility, and security
