refactor: complete bootstrap of ARNES agent harness framework

- Add complete agent harness structure with 8 roles (leader, triager, architect, implementer, reviewer, security, qa, documenter)
- Implement strict workflow with 9 stages and mandatory gates
- Add comprehensive verification script and runtime status tracking
- Create artifact-based evidence system with contracts and schemas
- Add agent policy matrix with permissions and anti-cheat rules
- Include test suite (44 tests passing) and CI-ready structure
- Add documentation: README, HOWTO, CHECKPOINTS, templates
- Configure model routing policies and token-aware task assignment
- Add BDD/SDD specification guides and feature templates
- Include starter pack for quick project onboarding

All verification checks pass. Framework ready for production use.

spec/bdd/README.md

@@ -0,0 +1,107 @@
+# BDD — Behavior Driven Development
+
+## Índice
+
+- [Overview](#overview)
+- [Features](#features)
+- [Step Definitions](#step-definitions)
+
+---
+
+## Overview
+
+Este directorio contiene especificaciones BDD en formato Gherkin.
+Los archivos `.feature` sirven como especificación ejecutable.
+
+### naming conventions
+
+```
+features/
+├── <domain>/
+│   ├── <feature-name>.feature
+│   └── <feature-name>.feature
+└── common/
+    └── <common-feature>.feature
+```
+
+### tags permitidos
+
+| Tag | Uso |
+|-----|-----|
+| `@F-XXX` | Link a feature del backlog |
+| `@smoke` | Tests críticos (siempre ejecutar) |
+| `@regression` | Tests de regresión |
+| `@integration` | Tests de integración |
+| `@e2e` | End-to-end tests |
+| `@unit` | Tests unitarios |
+| `@api` | Tests de API |
+| `@ui` | Tests de interfaz |
+
+---
+
+## Features
+
+Ver `spec/bdd/features/` para los archivos `.feature`.
+
+---
+
+## Step Definitions
+
+Los step definitions deben estar en:
+- Python: `features/steps/*.py`
+- JS/TS: `features/step_definitions/*.ts`
+- Go: `features/steps/*.go`
+
+### Template (Python/Behave)
+
+```python
+"""Steps para login feature."""
+from behave import given, when, then
+
+@given('un usuario registrado con email "{email}" y password "{password}"')
+def step_registered_user(context, email, password):
+    """Crea usuario de prueba."""
+    pass
+
+@when('el usuario ingresa su email "{email}"')
+def step_enter_email(context, email):
+    """Ingresa email en el formulario."""
+    pass
+
+@when('ingresa password "{password}"')
+def step_enter_password(context, password):
+    """Ingresa password."""
+    pass
+
+@then('el sistema muestra mensaje de error "{message}"')
+def step_show_error(context, message):
+    """Verifica mensaje de error."""
+    pass
+```
+
+---
+
+## Ejecutar Tests
+
+### Python (Behave)
+```bash
+behave features/
+behave features/ --tags @smoke
+behave features/ --tags ~@slow  # exclude
+```
+
+### Node.js (Cucumber)
+```bash
+npx cucumber-js features/
+npx cucumber-js features/ --tags "@smoke and @F-001"
+```
+
+---
+
+## Checklist de Feature
+
+- [ ] Feature documentado en Gherkin
+- [ ] Todos los scenarios tienen Given/When/Then
+- [ ] Tags `@F-XXX` presentes
+- [ ] Step definitions implementados
+- [ ] Tests ejecutables