chore: scaffold companion project with deps and config

.gitignore

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+__pycache__/
+*.py[cod]
+*$py.class
+*.egg-info/
+.pytest_cache/
+.mypy_cache/
+.venv/
+venv/
+.companion/
+dist/
+build/

config.json

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+{
+  "companion": {
+    "name": "SAN",
+    "persona": {
+      "role": "companion",
+      "tone": "reflective",
+      "style": "questioning",
+      "boundaries": [
+        "does_not_impersonate_user",
+        "no_future_predictions",
+        "no_medical_or_legal_advice"
+      ]
+    },
+    "memory": {
+      "session_turns": 20,
+      "persistent_store": "~/.companion/memory.db",
+      "summarize_after": 10
+    },
+    "chat": {
+      "streaming": true,
+      "max_response_tokens": 2048,
+      "default_temperature": 0.7,
+      "allow_temperature_override": true
+    }
+  },
+  "vault": {
+    "path": "./sample-data/Default",
+    "indexing": {
+      "auto_sync": true,
+      "auto_sync_interval_minutes": 1440,
+      "watch_fs_events": true,
+      "file_patterns": ["*.md"],
+      "deny_dirs": [".obsidian", ".trash", "zzz-Archive", ".git", ".logseq"],
+      "deny_patterns": ["*.tmp", "*.bak", "*conflict*", ".*"]
+    },
+    "chunking_rules": {
+      "default": {
+        "strategy": "sliding_window",
+        "chunk_size": 500,
+        "chunk_overlap": 100
+      },
+      "Journal/**": {
+        "strategy": "section",
+        "section_tags": ["#DayInShort", "#mentalhealth", "#physicalhealth", "#work", "#finance", "#Relations"],
+        "chunk_size": 300,
+        "chunk_overlap": 50
+      },
+      "zzz-Archive/**": {
+        "strategy": "sliding_window",
+        "chunk_size": 800,
+        "chunk_overlap": 150
+      }
+    }
+  },
+  "rag": {
+    "embedding": {
+      "provider": "ollama",
+      "model": "mxbai-embed-large",
+      "base_url": "http://localhost:11434",
+      "dimensions": 1024,
+      "batch_size": 32
+    },
+    "vector_store": {
+      "type": "lancedb",
+      "path": "./.companion/vectors.lance"
+    },
+    "search": {
+      "default_top_k": 8,
+      "max_top_k": 20,
+      "similarity_threshold": 0.75,
+      "hybrid_search": {
+        "enabled": true,
+        "keyword_weight": 0.3,
+        "semantic_weight": 0.7
+      },
+      "filters": {
+        "date_range_enabled": true,
+        "tag_filter_enabled": true,
+        "directory_filter_enabled": true
+      }
+    }
+  },
+  "model": {
+    "inference": {
+      "backend": "llama.cpp",
+      "model_path": "~/.companion/models/companion-7b-q4.gguf",
+      "context_length": 8192,
+      "gpu_layers": 35,
+      "batch_size": 512,
+      "threads": 8
+    },
+    "fine_tuning": {
+      "base_model": "unsloth/Meta-Llama-3.1-8B-Instruct-bnb-4bit",
+      "output_dir": "~/.companion/training",
+      "lora_rank": 16,
+      "lora_alpha": 32,
+      "learning_rate": 0.0002,
+      "batch_size": 4,
+      "gradient_accumulation_steps": 4,
+      "num_epochs": 3,
+      "warmup_steps": 100,
+      "save_steps": 500,
+      "eval_steps": 250,
+      "training_data_path": "~/.companion/training_data/",
+      "validation_split": 0.1
+    },
+    "retrain_schedule": {
+      "auto_reminder": true,
+      "default_interval_days": 90,
+      "reminder_channels": ["chat_stream", "log"]
+    }
+  },
+  "api": {
+    "host": "127.0.0.1",
+    "port": 7373,
+    "cors_origins": ["http://localhost:5173"],
+    "auth": {
+      "enabled": false
+    }
+  },
+  "ui": {
+    "web": {
+      "enabled": true,
+      "theme": "obsidian",
+      "features": {
+        "streaming": true,
+        "citations": true,
+        "source_preview": true
+      }
+    },
+    "cli": {
+      "enabled": true,
+      "rich_output": true
+    }
+  },
+  "logging": {
+    "level": "INFO",
+    "file": "./.companion/logs/companion.log",
+    "max_size_mb": 100,
+    "backup_count": 5
+  },
+  "security": {
+    "local_only": true,
+    "vault_path_traversal_check": true,
+    "sensitive_content_detection": true,
+    "sensitive_patterns": ["#mentalhealth", "#physicalhealth", "#finance", "#Relations"],
+    "require_confirmation_for_external_apis": true
+  }
+}

pyproject.toml

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+[project]
+name = "companion"
+version = "0.1.0"
+description = "Personal companion AI with local RAG"
+requires-python = ">=3.11"
+dependencies = [
+    "pydantic>=2.0",
+    "lancedb>=0.9.0",
+    "pyarrow>=15.0.0",
+    "requests>=2.31.0",
+    "watchdog>=4.0.0",
+    "typer>=0.12.0",
+    "rich>=13.0.0",
+    "numpy>=1.26.0",
+]
+
+[project.optional-dependencies]
+dev = [
+    "pytest>=8.0.0",
+    "pytest-asyncio>=0.23.0",
+    "httpx>=0.27.0",
+    "respx>=0.21.0",
+]
+
+[build-system]
+requires = ["hatchling"]
+build-backend = "hatchling.build"