WP-0001 complete: v1.1.0 lazy registry and install performance

Lazy-load agent registry (frontmatter index, parse on demand), copy
agents by path during install, fix Makefile template tab lint issue,
add registry performance tests, bump to 1.1.0, document CLI reinstall
after pull.

tests/test_registry.py

@@ -53,9 +53,9 @@ description: Second test agent
 
     registry = AgentRegistry(tmp_path)
 
-    assert len(registry._agents) == 2
-    assert "agent-one" in registry._agents
-    assert "agent-two" in registry._agents
+    assert registry.agent_names() == ["agent-one", "agent-two"]
+    assert registry.get_agent("agent-one") is not None
+    assert registry.get_agent("agent-two") is not None
 
 
 def test_agent_registry_get_agent(tmp_path):

tests/test_registry_lazy_load.py

@@ -0,0 +1,79 @@
+"""Registry lazy-loading performance tests (WP-0001 T06)."""
+
+from __future__ import annotations
+
+from pathlib import Path
+from unittest.mock import patch
+
+import pytest
+
+from kaizen_agentic.installer import AgentInstaller, InstallationConfig
+from kaizen_agentic.registry import AgentDefinition, AgentRegistry
+
+
+def _write_agent(path: Path, name: str) -> None:
+    path.write_text(
+        f"""---
+name: {name}
+description: Agent {name}
+category: testing
+---
+
+# {name}
+""",
+        encoding="utf-8",
+    )
+
+
+@pytest.fixture
+def large_registry(tmp_path: Path) -> AgentRegistry:
+    agents_dir = tmp_path / "agents"
+    agents_dir.mkdir()
+    for index in range(15):
+        _write_agent(agents_dir / f"agent-agent-{index}.md", f"agent-{index}")
+    _write_agent(agents_dir / "agent-tdd-workflow.md", "tdd-workflow")
+    return AgentRegistry(agents_dir)
+
+
+def test_registry_indexes_without_full_parse(large_registry: AgentRegistry):
+    assert len(large_registry.agent_names()) == 16
+    assert large_registry._agents == {}
+
+
+def test_get_agent_loads_only_requested_agent(large_registry: AgentRegistry):
+    with patch.object(
+        AgentDefinition,
+        "from_file",
+        wraps=AgentDefinition.from_file,
+    ) as mock_from_file:
+        agent = large_registry.get_agent("tdd-workflow")
+
+    assert agent is not None
+    assert agent.name == "tdd-workflow"
+    assert mock_from_file.call_count == 1
+
+
+def test_install_single_agent_parses_minimal_subset(
+    large_registry: AgentRegistry, tmp_path: Path
+):
+    installer = AgentInstaller(large_registry)
+    project_dir = tmp_path / "project"
+
+    with patch.object(
+        AgentDefinition,
+        "from_file",
+        wraps=AgentDefinition.from_file,
+    ) as mock_from_file:
+        results = installer.install_agents(
+            ["tdd-workflow"],
+            InstallationConfig(
+                target_dir=project_dir,
+                create_backup=False,
+                update_docs=False,
+            ),
+        )
+
+    assert results["tdd-workflow"] == "INSTALLED"
+    assert (project_dir / "agents" / "agent-tdd-workflow.md").exists()
+    # resolve_dependencies loads only the target agent, not the full fleet
+    assert mock_from_file.call_count == 1