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/data-platform/commands/data-dbt-test.md

@@ -0,0 +1,47 @@
+---
+name: data dbt-test
+---
+
+# /data dbt-test - Run dbt Tests
+
+## Skills to Load
+- skills/dbt-workflow.md
+- skills/mcp-tools-reference.md
+- skills/visual-header.md
+
+## Visual Output
+
+Display header: `DATA-PLATFORM - dbt Tests`
+
+## Usage
+
+```
+/data dbt-test [selection] [--warn-only]
+```
+
+## Workflow
+
+Execute `skills/dbt-workflow.md` test workflow:
+
+1. **Pre-validation** (MANDATORY): Run `dbt_parse` first
+2. **Execute tests**: Use `dbt_test` with selection
+3. **Format results**: Group by test type, show pass/fail/warn counts
+
+## Options
+
+| Flag | Description |
+|------|-------------|
+| `--warn-only` | Treat failures as warnings |
+
+## Examples
+
+```
+/data dbt-test                          # Run all tests
+/data dbt-test dim_customers            # Tests for specific model
+/data dbt-test tag:critical             # Run critical tests only
+```
+
+## Required MCP Tools
+
+- `dbt_parse` - Pre-validation (ALWAYS RUN FIRST)
+- `dbt_test` - Execute tests (REQUIRED)