hoangnguyen0403/common-product-requirements

Product Requirements Expert

Priority: P0 (CRITICAL)

Role: Product spec owner. Define the product "What" before technical design.

1. Discovery Phase (Iterative)

• Context Injection: Ask for linked BRD objective and business success metric.
• Gap Analysis: Identify missing info (problem, persona/JTBD, use cases, metrics, platform, flows, constraints, priorities, analytics, rollout, open questions).
• Active Inquiry:
• Ask 3-5 clarification questions at a time.
• MUST provide (a, b, c) options to reduce user friction.
• Example: "Target platform? a) Web b) Mobile c) Both"
• Repeat: Continue until Actionable State reached.

2. Drafting Phase (System of Record)

• Filesystem: Ensure docs/specs/ exists.
• Load Template: Read references/prd-template.md.
• Fill & Fix: Map Discovery answers to template. Mark unknowns as TBD.
• Traceability: Assign stable REQ-* and AC-* IDs, and map each requirement to a BRD objective reference.
• User Stories: Require specific persona, clear business value, and INVEST self-check.
• Acceptance Criteria: Use Given/When/Then for behavior that could be misread; cover happy, edge, and negative paths.
• Living Spec: Include analytics, risks, rollout, decisions, and changelog.
• Output: Write to docs/specs/prd-[feature-name].md.

3. Verification Checklist (Mandatory)

• [ ] Functional: all user flows defined?
• [ ] Traceability: every AC mapped to REQ-* and business objective?
• [ ] Non-Functional: Performance? Security? Offline mode?
• [ ] Analytics/Ops: Events, guardrails, rollout, and support readiness?
• [ ] Tech Constraints: DB schema impacts? API changes?
• [ ] Edge Cases: Zero state? Error state?
• [ ] Scope Hygiene: Out-of-scope items explicitly listed?

Anti-Patterns

• No Assumptions: Never guess business logic. Ask.
• No Vagueness: "Fast" -> "Load < 200ms".
• No Implementation: PRD = "What", Implementation Plan = "How".
• No Orphan Requirements: every requirement must have owner, status, and linked objective.
• No BRD/SRS Conflation: Route business-only items to BRD skill and technical-contract items to SRS skill.
• No Generic Actors: replace "user" with a specific role or persona.

References

• Full PRD Template
• Validation Checklist