chore: initialize monorepo structure for MeshBay

3-package layout: meshbay-common (shared crypto/protocol),
meshbay-hub (FastAPI server), meshbay-node (local daemon).

Includes validated POC spikes 1-6 in poc/, architecture drafts
v1/v2 in docs/, and CLAUDE.md project conventions.

All cryptographic primitives extracted from POC into
meshbay_common/crypto.py (GEK wrap/unwrap, chunk key derivation,
keystore encryption, chunk signing).

Co-Authored-By: Claude Sonnet 4.6 (1M context) <noreply@anthropic.com>

7 files changed, 83 insertions, 0 deletions

diff --git a/packages/meshbay-hub/pyproject.toml b/packages/meshbay-hub/pyproject.toml
new file mode 100644
index 0000000..e0a880a
--- /dev/null
+++ b/packages/meshbay-hub/pyproject.toml
@@ -0,0 +1,32 @@
+[build-system]
+requires = ["hatchling"]
+build-backend = "hatchling.build"
+
+[project]
+name = "meshbay-hub"
+version = "0.1.0"
+description = "MeshBay Hub — identity authority and group registry server"
+requires-python = ">=3.12"
+dependencies = [
+    "meshbay-common>=0.1.0",
+    "fastapi>=0.115",
+    "uvicorn[standard]>=0.30",
+    "sqlalchemy>=2.0",
+    "alembic>=1.13",
+    "asyncpg>=0.30",      # PostgreSQL async driver
+    "httpx>=0.28",
+]
+
+[project.optional-dependencies]
+dev = ["pytest>=8", "pytest-asyncio>=0.24", "ruff>=0.6", "httpx>=0.28"]
+
+[project.scripts]
+meshbay-hub = "meshbay_hub.daemon:main"
+
+[tool.hatch.build.targets.wheel]
+packages = ["src/meshbay_hub"]
+
+# RPM/DEB: meshbay-hub
+# Systemd service: meshbay-hub.service
+# Config: /etc/meshbay/hub.conf
+# Data: /var/lib/meshbay/hub/
diff --git a/packages/meshbay-hub/src/meshbay_hub/__init__.py b/packages/meshbay-hub/src/meshbay_hub/__init__.py
new file mode 100644
index 0000000..6372557
--- /dev/null
+++ b/packages/meshbay-hub/src/meshbay_hub/__init__.py
@@ -0,0 +1,3 @@
+"""MeshBay Hub — identity authority and group registry."""
+
+__version__ = "0.1.0"
diff --git a/packages/meshbay-hub/src/meshbay_hub/api/__init__.py b/packages/meshbay-hub/src/meshbay_hub/api/__init__.py
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/packages/meshbay-hub/src/meshbay_hub/api/__init__.py
diff --git a/packages/meshbay-hub/src/meshbay_hub/app.py b/packages/meshbay-hub/src/meshbay_hub/app.py
new file mode 100644
index 0000000..3b9ee4f
--- /dev/null
+++ b/packages/meshbay-hub/src/meshbay_hub/app.py
@@ -0,0 +1,31 @@
+"""
+MeshBay Hub — FastAPI application.
+
+POC endpoints are implemented in this file (in-memory storage).
+Production implementation will use db/ with SQLAlchemy + PostgreSQL.
+"""
+
+from fastapi import FastAPI
+from meshbay_hub import __version__
+from meshbay_common import MNP_VERSION, MHP_VERSION
+
+app = FastAPI(
+    title="MeshBay Hub",
+    version=__version__,
+    description="MeshBay identity authority and group registry",
+)
+
+# TODO: import and include routers from api/ submodules
+# from meshbay_hub.api import users, nodes, groups
+# app.include_router(users.router, prefix="/v1")
+# app.include_router(nodes.router, prefix="/v1")
+# app.include_router(groups.router, prefix="/v1")
+
+
+@app.get("/v1/hub/info")
+async def hub_info() -> dict:
+    return {
+        "hub_id":      "meshbay.org",
+        "mnp_version": MNP_VERSION,
+        "mhp_version": MHP_VERSION,
+    }
diff --git a/packages/meshbay-hub/src/meshbay_hub/daemon.py b/packages/meshbay-hub/src/meshbay_hub/daemon.py
new file mode 100644
index 0000000..ff8158a
--- /dev/null
+++ b/packages/meshbay-hub/src/meshbay_hub/daemon.py
@@ -0,0 +1,17 @@
+"""Entry point for the meshbay-hub systemd service."""
+
+import uvicorn
+from meshbay_hub.app import app  # noqa: F401
+
+
+def main() -> None:
+    uvicorn.run(
+        "meshbay_hub.app:app",
+        host="127.0.0.1",
+        port=8000,
+        log_level="info",
+    )
+
+
+if __name__ == "__main__":
+    main()
diff --git a/packages/meshbay-hub/src/meshbay_hub/db/__init__.py b/packages/meshbay-hub/src/meshbay_hub/db/__init__.py
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/packages/meshbay-hub/src/meshbay_hub/db/__init__.py
diff --git a/packages/meshbay-hub/tests/__init__.py b/packages/meshbay-hub/tests/__init__.py
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/packages/meshbay-hub/tests/__init__.py