[Feature Request] Add Role-Based Spec Sections for Stakeholder Participation

[kanfil]

Summary

Add role-based sections in specs to differentiate contributions from Product, Architecture, and Engineering stakeholders.

Problem

InfoQ article emphasizes: "Different stakeholders participate differently" - Product (what/why), Architect (technical approach), Engineer (task execution).

Proposal

1. Role Markers in Specs

Add explicit sections:

• Product Perspective: Business value, user stories, acceptance criteria
• Architecture Perspective: Technical decisions, constraints, patterns
• Engineering Perspective: Implementation tasks, test strategy

2. Role-Specific Templates

• Opt-in template variants for different stakeholders
• Guidance on who approves what in workflow

3. Stakeholder Views

• Commands to filter/specify view (e.g., /spec.plan --stakeholder product)

Priority

Medium - Aligns with InfoQ enterprise patterns