Initial commit — research-en skill bundle

5-skill bundle for structured, resumable, parallel deep research:
- /research              — preliminary outline + fields generation
- /research-add-items    — supplement research objects
- /research-add-fields   — supplement field definitions
- /research-deep         — parallel agents per item, resumable, JSON-validated
- /research-report       — JSON to markdown report with TOC

Includes validate_json.py for fields.yaml coverage check (PyYAML required).

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

.gitignore

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+# Python build artifacts
+__pycache__/
+*.py[cod]
+*$py.class
+*.egg-info/
+*.egg
+.eggs/
+build/
+dist/
+
+# Virtual environments
+.venv/
+venv/
+env/
+ENV/
+.python-version
+
+# Coverage / testing
+.coverage
+.coverage.*
+htmlcov/
+.tox/
+.nox/
+.pytest_cache/
+.mypy_cache/
+.ruff_cache/
+.dmypy.json
+
+# IDE / OS
+.idea/
+.vscode/
+!.vscode/settings.json
+!.vscode/launch.json
+!.vscode/extensions.json
+*.swp
+*.swo
+*~
+.DS_Store
+Thumbs.db
+desktop.ini
+
+# Jupyter
+.ipynb_checkpoints/
+
+# Secrets — never commit
+.env
+.env.local
+*.key
+*.pem
+credentials.json
+
+# Temp
+*.log
+*.tmp
+*.bak
+*.backup
+*.orig
+~$*