### repo_manifest
Create, read, update, list or validate project/deployment manifests (DB-backed).

Use this exact Agent Zero tool-call shape:
```json
{"tool_name":"repo_manifest","tool_args":{"project_name":"my_project","action":"read","manifest_type":"project"}}
```

Args:
- `project_name` (str): Projektname (bevorzugt)
- `project_root` (str): Legacy – wird zu basename() aufgelöst
- `manifest_type` (str): "project" (default), "deployment", "quality"
- `action` (str): "create" (default), "read", "update", "list", "validate"
- `data` (str|dict): JSON-string oder dict (für create/update)
- `format` (str): "summary" (default) oder "json"

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.