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-scan.md

@@ -0,0 +1,51 @@
+---
+name: sentinel scan
+description: Full security audit of codebase - scans all files for vulnerability patterns
+---
+
+# /sentinel scan
+
+Comprehensive security audit of the project.
+
+## Visual Output
+
+```
++----------------------------------------------------------------------+
+|  CODE-SENTINEL - Security Scan                                       |
++----------------------------------------------------------------------+
+```
+
+## Skills to Load
+
+- skills/security-patterns/SKILL.md
+
+## Process
+
+1. **File Discovery** - Scan: .py, .js, .ts, .jsx, .tsx, .go, .rs, .java, .rb, .php, .sh
+2. **Pattern Detection** - Apply patterns from skill (Critical/High/Medium severity)
+3. **Report** - Group by severity, include code snippets and fixes
+
+## Output Format
+
+```
+## Security Scan Report
+
+### Critical (Immediate Action Required)
+[red] file:line - Vulnerability Type
+   Code: `problematic code`
+   Fix: Recommended solution
+
+### High / Medium / Low
+[Similar format]
+
+### Summary
+- Critical: X (must fix before deploy)
+- High: X (fix soon)
+- Medium: X (improve when possible)
+```
+
+## Exit Guidance
+
+- Critical findings: Block merge/deploy
+- High findings: Fix before release
+- Medium/Low: Informational