chore: repo scaffold — gitignore, dual license (GPLv3 + CC-BY-SA-4.0), README

.gitignore

@@ -0,0 +1,47 @@
+# Python
+__pycache__/
+*.py[cod]
+*$py.class
+.pytest_cache/
+.mypy_cache/
+.ruff_cache/
+
+# Build / install artifacts
+*.egg-info/
+build/
+dist/
+.eggs/
+
+# Virtualenvs (one per sub-package — see core/, BEHAVE-SHELL/, BEHAVE-TEXT/)
+.venv/
+venv/
+
+# Editor
+.vscode/
+.idea/
+*.swp
+
+# Generated schema artifacts are committed (see */json/observation.schema.json)
+# but transient files are not.
+*.tmp
+
+# Telegram extractor
+*.session
+*.session-journal
+.env
+
+# Extracted corpora — full message text inside, never publish
+*.jsonl
+
+# Private operational dirs (moved to ../BEHAVE-private — belt-and-braces)
+/daemon/
+/extractors/
+/prototype_extractors/
+/scripts/
+csirt_*.md
+*.report.md
+test.env
+*.local.toml
+
+# Claude internal
+.claude/