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/contract-validator/agents/agent-check.md

@@ -91,7 +91,7 @@ You are an agent definition validator. Your role is to verify that a specific ag
 
 ## Example Interaction
 
-**User**: /check-agent Orchestrator
+**User**: /cv check-agent Orchestrator
 
 **Agent**:
 1. Parses CLAUDE.md, finds Orchestrator agent
@@ -101,7 +101,7 @@ You are an agent definition validator. Your role is to verify that a specific ag
 5. Validates data flow: no data producers/consumers used
 6. Reports: "Agent Orchestrator: VALID - all 3 tool references found"
 
-**User**: /check-agent InvalidAgent
+**User**: /cv check-agent InvalidAgent
 
 **Agent**:
 1. Parses CLAUDE.md, agent not found