Sprint 10 - Domain Advisory Pattern Replication Success

Sprint: 10 - Data Platform Domain Advisory Version: 5.7.0 Date: 2026-02-02

Context

Implemented the Domain Advisory Pattern for data-platform, following the established pattern from viz-platform (Sprint 9, v5.6.0). This completes the cross-plugin integration where projman can consult domain plugins for specialized validation.

What Worked Well

1. Detailed Implementation Plan as Input

Providing a comprehensive implementation specification document before /sprint-plan significantly accelerated planning and reduced ambiguity. The spec included:

Exact file paths for all new files
Content templates for each file
Dependency order for creation
"Files That DO NOT Change" section preventing scope creep

Recommendation: For complex cross-plugin features, write a detailed spec document first.

2. Pattern Replication from viz-platform

Following the existing design-reviewer agent and /design-gate command as a template made data-platform implementation predictable:

Same agent structure (modes, skills, error handling)
Same command format (gate vs review)
Same severity classification (FAIL/WARN/INFO)

Recommendation: When adding new domain plugins to the advisory pattern, always reference the first implementation as template.

3. Clean Additive Architecture

The v5.6.0 domain-consultation.md skill already contained:

Domain/Data detection rules
Acceptance criteria templates
Gate protocol for orchestrator

No projman changes were needed. The new files simply "picked up the phone" that projman was already calling.

Recommendation: Design integration points to be additive. The calling side should be complete before the called side exists.

Outcome

5/5 issues completed
4 new files created (skill, agent, 2 commands)
3 files modified (marketplace.json, README, CHANGELOG)
Domain Advisory Pattern now operational for both Viz and Data domains

Implementation Reference

Sprint 10 Wiki

Tags: domain-advisory, cross-plugin, data-platform, pattern-replication, architecture