feat(marketplace): command consolidation + 8 new plugins (v8.1.0 → v9.0.0) [BREAKING]

Phase 1b: Rename all ~94 commands across 12 plugins to /<noun> <action>
sub-command pattern. Git-flow consolidated from 8→5 commands (commit
variants absorbed into --push/--merge/--sync flags). Dispatch files,
name: frontmatter, and cross-reference updates for all plugins.

Phase 2: Design documents for 8 new plugins in docs/designs/.

Phase 3: Scaffold 8 new plugins — saas-api-platform, saas-db-migrate,
saas-react-platform, saas-test-pilot, data-seed, ops-release-manager,
ops-deploy-pipeline, debug-mcp. Each with plugin.json, commands, agents,
skills, README, and claude-md-integration. Marketplace grows from 12→20.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

plugins/viz-platform/commands/viz-design-gate.md

@@ -0,0 +1,95 @@
+---
+name: viz design-gate
+description: Design system compliance gate (pass/fail) for sprint execution
+gate_contract: v1
+arguments:
+  - name: path
+    description: File or directory to validate
+    required: true
+---
+
+# /viz design-gate
+
+Binary pass/fail validation for design system compliance. Used by projman orchestrator during sprint execution to gate issue completion.
+
+## Usage
+
+```
+/viz design-gate <path>
+```
+
+**Examples:**
+```
+/viz design-gate ./app/pages/dashboard.py
+/viz design-gate ./app/components/
+```
+
+## What It Does
+
+1. **Activates** the `design-reviewer` agent in gate mode
+2. **Loads** the `skills/design-system-audit.md` skill
+3. **Scans** target path for DMC usage
+4. **Checks only for FAIL-level violations:**
+   - Invalid component props
+   - Non-existent components
+   - Missing required props
+   - Deprecated components
+5. **Returns binary result:**
+   - `PASS` - No blocking violations found
+   - `FAIL` - One or more blocking violations
+
+## Output
+
+### On PASS
+```
+DESIGN GATE: PASS
+No blocking design system violations found.
+```
+
+### On FAIL
+```
+DESIGN GATE: FAIL
+
+Blocking Issues (2):
+1. app/pages/home.py:45 - Invalid prop 'onclick' on dmc.Button
+   Fix: Use 'n_clicks' for click handling
+
+2. app/components/nav.py:12 - Component 'dmc.Navbar' not found
+   Fix: Use 'dmc.AppShell.Navbar' (DMC v0.14+)
+
+Run /viz design-review for full audit report.
+```
+
+## Integration with projman
+
+This command is automatically invoked by the projman orchestrator when:
+
+1. An issue has the `Domain/Viz` label
+2. The orchestrator is about to mark the issue as complete
+3. The orchestrator passes the path of changed files
+
+**Gate behavior:**
+- PASS -> Issue can be marked complete
+- FAIL -> Issue stays open, blocker comment added
+
+## Differences from /viz design-review
+
+| Aspect | /viz design-gate | /viz design-review |
+|--------|------------------|---------------------|
+| Output | Binary PASS/FAIL | Detailed report |
+| Severity | FAIL only | FAIL + WARN + INFO |
+| Purpose | Automation gate | Human review |
+| Verbosity | Minimal | Comprehensive |
+
+## When to Use
+
+- **Automated pipelines**: CI/CD design system checks
+- **Sprint execution**: Automatic quality gates
+- **Quick validation**: Fast pass/fail without full report
+
+For detailed findings, use `/viz design-review` instead.
+
+## Requirements
+
+- viz-platform MCP server must be running
+- Target path must exist