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/code-sentinel/commands/sentinel-refactor.md

@@ -0,0 +1,53 @@
+---
+name: sentinel refactor
+description: Apply refactoring patterns to improve code structure and maintainability
+---
+
+# /sentinel refactor
+
+Apply refactoring transformations to specified code.
+
+## Visual Output
+
+```
++----------------------------------------------------------------------+
+|  CODE-SENTINEL - Refactor                                            |
++----------------------------------------------------------------------+
+```
+
+## Usage
+```
+/sentinel refactor <target> [--pattern=<pattern>]
+```
+
+**Target:** File path, function name, or "." for current context
+**Pattern:** Specific refactoring pattern (optional)
+
+## Skills to Load
+
+- skills/refactoring-patterns.md
+
+## Process
+
+1. **Analyze Target** - Parse code, identify opportunities from skill, check dependencies
+2. **Propose Changes** - Show before/after diff, explain improvement, list affected files
+3. **Apply (with confirmation)** - Make changes, update references, run tests
+
+## Output Format
+
+```
+## Refactoring: <pattern>
+
+### Target
+<file>:<function> (lines X-Y)
+
+### Changes
+- Change description
+
+### Files Modified
+- file1.py
+
+### Metrics
+- Cyclomatic complexity: X -> Y
+- Function length: X -> Y lines
+```