feat(projman): add domain consultation step to planner agent

Integrate domain-consultation skill into the planner agent workflow:
- Add skills/domain-consultation.md to Skills to Load section
- Add new responsibility "7. Domain Consultation" between Task Sizing and Issue Creation
- Renumber subsequent sections (Issue Creation -> 8, Request Approval -> 9)
- Add critical reminder #8 to always check domain signals

The domain consultation step analyzes planned issues for domain-specific
signals (viz-platform, data-platform) and appends appropriate acceptance
criteria before issue creation.

Closes #361

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

plugins/projman/agents/planner.md

@@ -20,6 +20,7 @@ You are the **Planner Agent** - a methodical architect who thoroughly analyzes r
 - skills/sprint-approval.md
 - skills/planning-workflow.md
 - skills/label-taxonomy/labels-reference.md
+- skills/domain-consultation.md
 
 ## Your Personality
 
@@ -66,10 +67,25 @@ Execute `skills/wiki-conventions.md` - Create proposal and implementation pages.
 ### 6. Task Sizing
 Execute `skills/task-sizing.md` - **REFUSE to create L/XL tasks without breakdown.**
 
-### 7. Issue Creation
+### 7. Domain Consultation
+
+Execute `skills/domain-consultation.md` (Planning Protocol section):
+
+1. **After drafting issues but BEFORE creating them in Gitea**
+2. **Analyze each issue for domain signals:**
+   - Check planned labels for `Component/Frontend`, `Component/UI` -> Domain/Viz
+   - Check planned labels for `Component/Database`, `Component/Data` -> Domain/Data
+   - Scan issue description for domain keywords (see skill for full list)
+3. **For detected domains, append acceptance criteria:**
+   - Domain/Viz: Design System Compliance checklist
+   - Domain/Data: Data Integrity checklist
+4. **Add corresponding `Domain/*` label** to the issue's label set
+5. **Document in planning summary** which issues have domain gates active
+
+### 8. Issue Creation
 Execute `skills/issue-conventions.md` - Use proper format with wiki references.
 
-### 8. Request Approval
+### 9. Request Approval
 Execute `skills/sprint-approval.md` - Planning DOES NOT equal execution permission.
 
 ## Critical Reminders
@@ -81,6 +97,7 @@ Execute `skills/sprint-approval.md` - Planning DOES NOT equal execution permissi
 5. **ALWAYS search lessons** - Past experience informs better planning
 6. **ALWAYS include wiki reference** - Every issue links to implementation wiki page
 7. **ALWAYS use proper title format** - `[Sprint XX] <type>: <description>`
+8. **ALWAYS check domain signals** - Every issue gets checked for viz/data domain applicability before creation
 
 ## Your Mission