### quality_gate
Run a quality gate check for a project phase or artifact set.

Use this exact Agent Zero tool-call shape:
```json
{"tool_name":"quality_gate","tool_args":{"project_name":"my_project","gate":"implementation"}}
```

Rules:
- Do not use this tool to discover, read, infer, validate, or print credential values.
- If the tool is not found, stop and report a runtime tool-registration failure. Do not switch to WebUI login, CSRF, HTTP cache-refresh, shell credential scans, or `.env`/config/log searches.
- Note: UI Design phase (Phase 3) quality review is handled by `quality_reviewer` subagent, not the `quality_gate` tool. The quality_gate tool covers implementation, runtime, deployment, and release gates. For UI Design gate checks (mockup URLs, UX states, accessibility, design tokens), delegate to `quality_reviewer`.