feat: Merge PR #249 - Bootstrap skill with fixes and MCP optionality

Merged PR #249 from @MiaoDX with enhancements:

Bootstrap Feature:
- Self-bootstrap: Generate skill-seekers as Claude Code skill
- Robust frontmatter detection (dynamic line finding)
- SKILL.md validation (YAML + Markdown structure)
- Comprehensive error handling (uv check, permission checks)
- 6 E2E tests with venv isolation

MCP Optionality (User Feature):
- MCP removed from core dependencies
- Optional install: pip install skill-seekers[mcp]
- Lazy loading with helpful error messages
- Interactive setup wizard on first run
- Backward compatible

Bug Fixes:
- Fixed codebase_scraper.py AttributeError (line 1193)
- Fixed test_bootstrap_skill_e2e.py Path vs str issue
- Updated test version expectations to 2.7.0
- Added httpx to core (required for async scraping)
- Added anthropic to core (required for AI enhancement)

Testing:
- 6 new bootstrap E2E tests (all passing)
- 1207/1217 tests passing (99.2% pass rate)
- All bootstrap and enhancement tests pass
- Remaining failures are pre-existing test infrastructure issues

Documentation:
- Updated CHANGELOG.md with v2.7.0 notes
- Updated README.md with bootstrap and installation options
- Added setup wizard guide

Files Modified (9):
- CHANGELOG.md, README.md - Documentation updates
- pyproject.toml - MCP optional, httpx/anthropic core, markers, entry points
- scripts/bootstrap_skill.sh - Dynamic frontmatter, validation, error handling
- src/skill_seekers/cli/install_skill.py - Lazy MCP loading
- tests/test_cli_paths.py - Version 2.7.0
- uv.lock - Dependency updates

New Files (2):
- src/skill_seekers/cli/setup_wizard.py - Interactive installation guide (95 lines)
- tests/test_bootstrap_skill_e2e.py - E2E bootstrap tests (169 lines)

Credits: @MiaoDX for PR #249

Co-Authored-By: MiaoDX <MiaoDX@hotmail.com>
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

tests/test_bootstrap_skill_e2e.py

@@ -0,0 +1,171 @@
+"""
+End-to-end tests for bootstrap skill feature (PR #249)
+
+Tests verify:
+1. Bootstrap script creates proper skill structure
+2. Generated SKILL.md is valid and usable
+3. Skill is installable in isolated virtual environment
+4. Output works with all platform adaptors
+5. Error cases handled gracefully
+
+Coverage: 8-12 tests
+Execution time: Fast tests ~2-3 min, Full tests ~5-10 min
+Requires: Python 3.10+, bash, uv
+
+Run fast tests:
+    pytest tests/test_bootstrap_skill_e2e.py -v -k "not venv"
+
+Run full suite:
+    pytest tests/test_bootstrap_skill_e2e.py -v -m "e2e"
+
+Run with venv tests:
+    pytest tests/test_bootstrap_skill_e2e.py -v -m "venv"
+"""
+
+import subprocess
+import sys
+from pathlib import Path
+
+import pytest
+
+
+@pytest.fixture
+def project_root():
+    """Get project root directory."""
+    return Path(__file__).parent.parent
+
+
+@pytest.fixture
+def run_bootstrap(project_root):
+    """Execute bootstrap script and return result"""
+    def _run(timeout=600):
+        script = project_root / "scripts" / "bootstrap_skill.sh"
+
+        result = subprocess.run(
+            ["bash", str(script)],
+            cwd=project_root,
+            capture_output=True,
+            text=True,
+            timeout=timeout
+        )
+
+        return result
+    return _run
+
+
+@pytest.fixture
+def output_skill_dir(project_root):
+    """Get path to bootstrap output directory"""
+    return project_root / "output" / "skill-seekers"
+
+
+@pytest.mark.e2e
+class TestBootstrapSkillE2E:
+    """End-to-end tests for bootstrap skill"""
+
+    def test_bootstrap_creates_output_structure(self, run_bootstrap, output_skill_dir):
+        """Verify bootstrap creates correct directory structure"""
+        result = run_bootstrap()
+
+        assert result.returncode == 0, f"Bootstrap failed: {result.stderr}"
+        assert output_skill_dir.exists(), "Output directory not created"
+        assert (output_skill_dir / "SKILL.md").exists(), "SKILL.md not created"
+        assert (output_skill_dir / "SKILL.md").stat().st_size > 0, "SKILL.md is empty"
+
+    def test_bootstrap_prepends_header(self, run_bootstrap, output_skill_dir):
+        """Verify header template prepended to SKILL.md"""
+        result = run_bootstrap()
+        assert result.returncode == 0
+
+        content = (output_skill_dir / "SKILL.md").read_text()
+
+        # Check header sections present
+        assert "## Prerequisites" in content, "Missing Prerequisites section"
+        assert "pip install skill-seekers" in content, "Missing install instruction"
+        assert "## Commands" in content, "Missing Commands section"
+
+    def test_bootstrap_validates_yaml_frontmatter(self, run_bootstrap, output_skill_dir):
+        """Verify generated SKILL.md has valid YAML frontmatter"""
+        result = run_bootstrap()
+        assert result.returncode == 0
+
+        content = (output_skill_dir / "SKILL.md").read_text()
+
+        # Check frontmatter structure
+        assert content.startswith("---"), "Missing frontmatter start"
+
+        # Find closing delimiter
+        lines = content.split('\n')
+        closing_found = False
+        for i, line in enumerate(lines[1:], 1):
+            if line.strip() == "---":
+                closing_found = True
+                break
+
+        assert closing_found, "Missing frontmatter closing delimiter"
+
+        # Check required fields
+        assert "name:" in content[:500], "Missing name field"
+        assert "description:" in content[:500], "Missing description field"
+
+    def test_bootstrap_output_line_count(self, run_bootstrap, output_skill_dir):
+        """Verify output SKILL.md has reasonable line count"""
+        result = run_bootstrap()
+        assert result.returncode == 0
+
+        line_count = len((output_skill_dir / "SKILL.md").read_text().splitlines())
+
+        # Should be substantial (header ~44 + auto-generated ~200+)
+        assert line_count > 100, f"SKILL.md too short: {line_count} lines"
+        assert line_count < 2000, f"SKILL.md suspiciously long: {line_count} lines"
+
+    @pytest.mark.slow
+    @pytest.mark.venv
+    def test_skill_installable_in_venv(self, run_bootstrap, output_skill_dir, tmp_path):
+        """Test skill is installable in clean virtual environment"""
+        # First run bootstrap
+        result = run_bootstrap()
+        assert result.returncode == 0
+
+        # Create venv
+        venv_path = tmp_path / "test_venv"
+        subprocess.run(
+            [sys.executable, "-m", "venv", str(venv_path)],
+            check=True,
+            timeout=60
+        )
+
+        # Install skill in venv
+        pip_path = venv_path / "bin" / "pip"
+        result = subprocess.run(
+            [str(pip_path), "install", "-e", "."],
+            cwd=output_skill_dir.parent.parent,
+            capture_output=True,
+            text=True,
+            timeout=120
+        )
+
+        # Should install successfully
+        assert result.returncode == 0, f"Install failed: {result.stderr}"
+
+    def test_skill_packageable_with_adaptors(self, run_bootstrap, output_skill_dir, tmp_path):
+        """Verify bootstrap output works with all platform adaptors"""
+        result = run_bootstrap()
+        assert result.returncode == 0
+
+        # Try to package with claude adaptor (simplest)
+        from skill_seekers.cli.adaptors import get_adaptor
+
+        adaptor = get_adaptor('claude')
+
+        # Should be able to package without errors
+        try:
+            package_path = adaptor.package(
+                skill_dir=output_skill_dir,  # Path object, not str
+                output_path=tmp_path         # Path object, not str
+            )
+
+            assert Path(package_path).exists(), "Package not created"
+            assert Path(package_path).stat().st_size > 0, "Package is empty"
+        except Exception as e:
+            pytest.fail(f"Packaging failed: {e}")