chore: initialize project scaffold and config

Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-opencode)

Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>

pyproject.toml

@@ -0,0 +1,63 @@
+[project]
+name = "mnemosyne"
+version = "0.1.0"
+description = "Object-addressed context memory for LLM agents — multi-fidelity compression with goal-aware retrieval"
+readme = "README.md"
+requires-python = ">=3.12"
+dependencies = [
+    # --- Inherited from Pichay (proxy foundation) ---
+    "httpx>=0.27",
+    "fastapi>=0.116.0",
+    "uvicorn>=0.35.0",
+    "anthropic>=0.84.0",
+    "numpy>=2.2.0",
+
+    # --- Mnemosyne additions ---
+    # PostgreSQL + vector search (backing store)
+    "asyncpg>=0.30.0",
+    "pgvector>=0.3.6",
+
+    # Embeddings (semantic search, goal detection)
+    "sentence-transformers>=3.4.0",
+
+    # Config
+    "tomli>=2.0.0; python_version < '3.11'",
+
+    # Telemetry (optional, from Pichay)
+    "prometheus-client>=0.23.0",
+]
+
+[project.optional-dependencies]
+dev = [
+    "pytest>=8.0",
+    "pytest-asyncio>=0.25.0",
+    "ruff>=0.9.0",
+]
+# Pichay analysis tools (not needed for proxy operation)
+analysis = [
+    "matplotlib>=3.10.0",
+    "polars>=1.38.0",
+    "dask>=2024.1.0",
+    "flask>=3.0",
+]
+
+[project.scripts]
+mnemosyne = "mnemosyne.gateway:main"
+
+[build-system]
+requires = ["hatchling"]
+build-backend = "hatchling.build"
+
+[tool.hatch.build.targets.wheel]
+packages = ["src/mnemosyne"]
+
+[tool.ruff]
+target-version = "py312"
+line-length = 100
+
+[tool.ruff.lint]
+select = ["E", "F", "I", "N", "W", "UP"]
+
+[tool.pytest.ini_options]
+asyncio_mode = "auto"
+testpaths = ["tests"]