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/debug-mcp/skills/log-analysis.md

@@ -0,0 +1,105 @@
+# Log Analysis Skill
+
+Common MCP server error patterns, their root causes, and fixes.
+
+## Error Pattern: ImportError
+
+```
+ImportError: No module named 'pynetbox'
+```
+
+**Root Cause:** Missing Python package in the virtual environment.
+
+**Fix:**
+```bash
+cd <server_cwd> && .venv/bin/pip install -r requirements.txt
+```
+
+**Prevention:** Always run `pip install -r requirements.txt` after creating or updating a venv.
+
+## Error Pattern: ConnectionRefused
+
+```
+ConnectionRefusedError: [Errno 111] Connection refused
+```
+
+**Root Cause:** The external service the MCP server connects to is not running or not reachable.
+
+**Checks:**
+1. Is the target service running? (e.g., Gitea, NetBox)
+2. Is the URL correct in the env file?
+3. Is there a firewall or VPN issue?
+
+**Fix:** Verify the service URL in `~/.config/claude/<server>.env` and confirm the service is accessible.
+
+## Error Pattern: JSONDecodeError
+
+```
+json.decoder.JSONDecodeError: Expecting value: line 1 column 1
+```
+
+**Root Cause:** The server received non-JSON response from the external API. Usually means:
+- API returned HTML error page (wrong URL)
+- API returned empty response (auth failed silently)
+- Proxy intercepted the request
+
+**Fix:** Check the API URL ends with the correct path (e.g., `/api/v1` for Gitea, `/api` for NetBox).
+
+## Error Pattern: TimeoutError
+
+```
+TimeoutError: timed out
+httpx.ReadTimeout:
+```
+
+**Root Cause:** Server startup took too long or external API is slow.
+
+**Checks:**
+1. Network latency to the external service
+2. Server doing heavy initialization (loading all tools)
+3. Large response from API
+
+**Fix:** Increase timeout in server config or reduce initial tool registration.
+
+## Error Pattern: PermissionError
+
+```
+PermissionError: [Errno 13] Permission denied: '/path/to/file'
+```
+
+**Root Cause:** Server process cannot read/write required files.
+
+**Fix:** Check file ownership and permissions. Common locations:
+- `~/.config/claude/*.env` (should be readable by user)
+- Server's `.venv/` directory
+- Log files
+
+## Error Pattern: FileNotFoundError (Venv)
+
+```
+FileNotFoundError: [Errno 2] No such file or directory: '.venv/bin/python'
+```
+
+**Root Cause:** Virtual environment does not exist or was deleted.
+
+**Fix:** Create the venv:
+```bash
+cd <server_cwd> && python3 -m venv .venv && .venv/bin/pip install -r requirements.txt
+```
+
+## Error Pattern: SSL Certificate Error
+
+```
+ssl.SSLCertVerificationError: certificate verify failed
+```
+
+**Root Cause:** Self-signed certificate on the target service.
+
+**Fix:** Set `VERIFY_SSL=false` in the env file (not recommended for production).
+
+## Log Parsing Tips
+
+1. **Python tracebacks** - Read from bottom up. The last line is the actual error.
+2. **JSON-RPC errors** - Look for `"error"` key in JSON responses.
+3. **Startup failures** - First few lines after server spawn reveal initialization issues.
+4. **Repeated errors** - Same error in a loop means the server is retrying and failing.