feat(CUST-WP-0016): kaizen-agentic integration — MCP tools, templates, direct install

- Fix /domains/{slug}/ 500: EP/TD queries now use domain_id FK (not string column)
- Remove dead cascade-slug code in rename_domain (FK handles it)
- MCP: list_kaizen_agents(category?) + get_kaizen_agent(name) via resolve_repo_path()
- TOOLS.md: Kaizen Agents section with discovery/load pattern
- agents.template: new project rule for consumer repos
- claude-md.template + register_project.sh: include agents.md in new-project scaffolding
- agents/: direct install of 6 curated agents for hub sessions

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

mcp_server/TOOLS.md

@@ -127,6 +127,30 @@ Dashboard: `http://localhost:3000/inbox`
 
 ---
 
+## Kaizen Agents
+
+Specialized agent personas from `kaizen-agentic/agents/`. Each agent is a markdown
+instruction set — load it and follow the instructions it contains.
+
+| Tool | Key Args | When to use |
+|------|----------|-------------|
+| `list_kaizen_agents(category?)` | `category`: optional filter (testing/quality/process/infrastructure) | Discover all 17 available agent personas with name, description, category. |
+| `get_kaizen_agent(name)` | `name`: e.g. `"tdd-workflow"`, `"code-refactoring"` | Load full agent instructions. Read and follow them. |
+
+**Common agents:**
+
+| Agent | Category | When to use |
+|-------|----------|-------------|
+| `tdd-workflow` | testing | Step-by-step TDD8 workflow for any feature |
+| `code-refactoring` | quality | Code quality analysis and safe refactoring |
+| `test-maintenance` | testing | Diagnose and fix failing tests |
+| `requirements-engineering` | process | Prevent interface/mock mismatches upfront |
+| `keepaTodofile` | process | Maintain TODO.md during work |
+| `project-management` | process | Track status, determine next steps |
+| `datamodel-optimization` | quality | Optimize dataclasses and data structures |
+
+---
+
 ## Domain Slugs
 
 Run `list_domains()` to get the live list. Default 6: `custodian` · `railiance` · `markitect` · `coulomb_social` · `personhood` · `foerster_capabilities`