Add "lessons/sprints/sprint-10---domain-advisory-pattern-replication-success"

lessons%2Fsprints%2Fsprint-10---domain-advisory-pattern-replication-success.-.md

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+# 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](https://gitea.hotserv.cloud/personal-projects/leo-claude-mktplace/wiki/Change-V5.7.0%3A-Data-Platform-Domain-Advisory-%28Sprint-10-Implementation%29)
+
+
+---
+**Tags:** domain-advisory, cross-plugin, data-platform, pattern-replication, architecture