docs: route Delivery through development skills

tests/test_development_skill_routing.py

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+from pathlib import Path
+
+ROOT = Path(__file__).resolve().parents[1]
+SKILL = (ROOT / "SKILL.md").read_text(encoding="utf-8")
+RUNTIME = (ROOT / "references/runtime-and-ci.md").read_text(encoding="utf-8")
+
+REFERENCES = {
+    "development-durable-wave-execution": "https://gitea.lego-cloud.eu/home-v1-skills-code-agent/development-durable-wave-execution",
+    "development-gates": "https://gitea.lego-cloud.eu/home-v1-skills-code-agent/development-gates",
+    "development-integrity": "https://gitea.lego-cloud.eu/home-v1-skills-code-agent/development-integrity",
+    "development-method-ttd": "https://gitea.lego-cloud.eu/home-v1-skills-code-agent/development-method-ttd",
+    "development-branching-strategy": "https://gitea.lego-cloud.eu/home-v1-skills-code-agent/development-branching-strategy",
+    "development-monorepo-pnpm": "https://gitea.lego-cloud.eu/home-v1-skills-code-agent/development-monorepo-pnpm",
+    "development-scripts": "https://gitea.lego-cloud.eu/home-v1-skills-code-agent/development-scripts",
+    "development-gitops-argo-cd-gondor-v1": "https://gitea.lego-cloud.eu/home-v1-skills-code-agent/development-gitops-argo-cd-gondor-v1",
+}
+
+
+def test_delivery_reference_routes_reusable_development_procedures() -> None:
+    assert "## Development Skill Routing" in SKILL
+    for name, url in REFERENCES.items():
+        assert name in SKILL
+        assert url in SKILL
+
+
+def test_generic_automation_is_owned_by_development_scripts() -> None:
+    assert "`development-scripts` owns Taskfile, `.scripts/`" in SKILL
+    assert "must not restate generic RED–GREEN–REFACTOR mechanics" in SKILL
+
+
+def test_gitops_reference_requires_one_environment_per_repository() -> None:
+    assert "development-gitops-argo-cd-gondor-v1" in RUNTIME
+    assert "one repository per environment" in RUNTIME