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/claude-config-maintainer/commands/claude-config-diff.md

@@ -0,0 +1,49 @@
+---
+name: claude-config diff
+description: Show diff between current CLAUDE.md and last commit
+---
+
+# /claude-config diff
+
+Show differences between CLAUDE.md versions to track configuration drift.
+
+## Skills to Load
+
+- skills/visual-header.md
+- skills/diff-analysis.md
+
+## Visual Output
+
+Display: `CONFIG-MAINTAINER - CLAUDE.md Diff`
+
+## Usage
+
+```
+/claude-config diff                           # Working vs last commit
+/claude-config diff --commit=abc1234          # Working vs specific commit
+/claude-config diff --from=v1.0 --to=v2.0     # Compare two commits
+/claude-config diff --section="Critical Rules"  # Specific section only
+```
+
+## Workflow
+
+1. Find project's CLAUDE.md file
+2. Show diff against target revision
+3. Group changes by affected sections
+4. Explain behavioral implications
+
+## Options
+
+| Option | Description |
+|--------|-------------|
+| `--commit=REF` | Compare against specific commit |
+| `--from=REF` | Starting point |
+| `--to=REF` | Ending point (default: HEAD) |
+| `--section=NAME` | Show only specific section |
+| `--stat` | Statistics only |
+
+## When to Use
+
+- Before committing CLAUDE.md changes
+- Reviewing changes after pull
+- Debugging unexpected behavior