First version. I can init

tests/test_fs_ops.py

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+"""Tests for myclaude.fs_ops module."""
+
+from pathlib import Path
+
+import pytest
+
+from myclaude.fs_ops import (
+  collect_local_skills,
+  copy_claude_md_to_project,
+  copy_skills_to_project,
+  copy_skills_to_repo,
+)
+
+
+def test_i_can_copy_all_skills(tmp_project: Path, tmp_repo: Path) -> None:
+  copy_skills_to_project(tmp_repo, tmp_project)
+  assert (tmp_project / ".claude" / "skills" / "skill_a" / "SKILL.md").exists()
+  assert (tmp_project / ".claude" / "skills" / "skill_b" / "SKILL.md").exists()
+
+
+@pytest.mark.parametrize("requested,expected", [
+    (["skill_a"], ["skill_a"]),
+    (["skill_a", "skill_b"], ["skill_a", "skill_b"]),
+])
+def test_i_can_copy_filtered_skills(
+    tmp_project: Path,
+    tmp_repo: Path,
+    requested: list[str],
+    expected: list[str],
+) -> None:
+  copy_skills_to_project(tmp_repo, tmp_project, skills=requested)
+  installed = collect_local_skills(tmp_project)
+  assert installed == sorted(expected)
+
+
+def test_i_can_copy_claude_md(tmp_project: Path, tmp_repo: Path) -> None:
+  copy_claude_md_to_project(tmp_repo, tmp_project)
+  assert (tmp_project / "CLAUDE.md").read_text() == "# Claude Template"
+
+
+def test_i_cannot_init_when_skills_dir_exists(tmp_project: Path, tmp_repo: Path) -> None:
+  (tmp_project / ".claude" / "skills").mkdir(parents=True)
+  with pytest.raises(FileExistsError):
+    copy_skills_to_project(tmp_repo, tmp_project)
+
+
+def test_i_can_force_overwrite_skills_dir(tmp_project: Path, tmp_repo: Path) -> None:
+  skills_dir = tmp_project / ".claude" / "skills"
+  (skills_dir / "old_skill").mkdir(parents=True)
+  copy_skills_to_project(tmp_repo, tmp_project, force=True)
+  assert not (skills_dir / "old_skill").exists()
+  assert (skills_dir / "skill_a").exists()
+
+
+@pytest.mark.parametrize("unknown_skill", ["ghost", "unknown", "skill99"])
+def test_i_cannot_copy_unknown_skill(
+    tmp_project: Path,
+    tmp_repo: Path,
+    unknown_skill: str,
+) -> None:
+  with pytest.raises(ValueError, match=unknown_skill):
+    copy_skills_to_project(tmp_repo, tmp_project, skills=[unknown_skill])
+
+
+def test_i_can_collect_local_skills(tmp_project: Path) -> None:
+  for skill in ("skill_a", "skill_b"):
+    (tmp_project / ".claude" / "skills" / skill).mkdir(parents=True)
+  assert collect_local_skills(tmp_project) == ["skill_a", "skill_b"]
+
+
+def test_i_can_copy_skills_to_repo(tmp_project: Path, tmp_repo: Path) -> None:
+  skill_dir = tmp_project / ".claude" / "skills" / "skill_a"
+  skill_dir.mkdir(parents=True)
+  (skill_dir / "SKILL.md").write_text("# Updated A")
+  copy_skills_to_repo(tmp_project, tmp_repo)
+  assert (tmp_repo / "skills" / "skill_a" / "SKILL.md").read_text() == "# Updated A"