WP-0001-T014: minimal HTTP app and CLI

src/artifactstore/app.py (new): composition root. build_registry(settings)
wires AsyncEngine + LocalBackend + InProcessDataPlane + RegistryViewWriter
into a Registry. Used by both the HTTP app and the CLI.

src/artifactstore/registry/__init__.py: adds db_health() (SELECT 1 probe),
backend_health() (pass-through to dataplane), and dispose() (engine
shutdown) helpers so the HTTP /health endpoint and CLI commands can talk
to the registry without reaching for private state.

src/artifactstore/api/http/__init__.py:
- create_app(settings=None) factory; lifespan owns the registry instance
  and disposes it on shutdown.
- GET / returns the scaffold banner.
- GET /health reports overall status + db {healthy, detail} + backend
  {backend_id, healthy, detail, free_bytes, total_bytes}. Uses
  FastAPI Depends() with a request->state.registry helper rather than
  reaching app.state directly.
- Module-level `app = create_app()` so `uvicorn artifactstore.api.http:app`
  keeps working.

src/artifactstore/cli/__init__.py:
- migrate: `alembic upgrade head` via the alembic command API.
- replay: drops + rebuilds materialised views from the event log; prints
  the highest applied sequence.
- health: prints the same payload as the HTTP /health endpoint, as JSON.
- version unchanged.

Tests:
- tests/integration/test_http_health.py (TestClient-based): /
  scaffold banner; /health reports ok with db.healthy + backend.healthy
  + free_bytes populated.
- tests/integration/test_cli_commands.py (typer CliRunner): version
  prints; migrate creates the schema (events + retention_classes +
  alembic_version); replay against an empty log exits ok with
  "replayed up to sequence 0"; health prints a status=ok JSON payload.

Gates: ruff clean, mypy --strict clean on 48 files, 83 tests pass.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

src/artifactstore/api/http/__init__.py

@@ -1,24 +1,80 @@
-"""FastAPI application entry point.
+"""FastAPI application — HTTP surface for the registry.
 
-The full registry-aware ``/health`` endpoint lands in
+T014 ships a minimal app with two routes:
-ARTIFACT-STORE-WP-0001-T014. This scaffold exposes a minimal root route so
+
-``make dev`` has something to serve while the registry layer is being built.
+* ``GET /`` — service banner.
+* ``GET /health`` — registry liveness + DB connectivity + storage backend.
+
+Richer endpoints (package CRUD, file upload, manifest retrieval, event
+stream) land in workplan WP-0002. The app is built through
+:func:`create_app` so tests can inject their own settings.
 """
 
 from __future__ import annotations
 
-from fastapi import FastAPI
+from contextlib import asynccontextmanager
+from typing import Any
+
+from fastapi import Depends, FastAPI, Request
 
 from artifactstore import __version__
+from artifactstore.app import build_registry
+from artifactstore.config import Settings
+from artifactstore.registry import Registry
 
-app = FastAPI(title="artifact-store", version=__version__)
+__all__ = ["app", "create_app"]
 
 
-@app.get("/")
+def get_registry(request: Request) -> Registry:
-def root() -> dict[str, str]:
+    return request.app.state.registry  # type: ignore[no-any-return]
-    """Return a service banner indicating the scaffold is up."""
+
-    return {
+
-        "service": "artifact-store",
+def create_app(settings: Settings | None = None) -> FastAPI:
-        "version": __version__,
+    """Build the FastAPI app. Lifespan owns the registry instance."""
-        "status": "scaffold",
+
-    }
+    @asynccontextmanager
+    async def lifespan(application: FastAPI) -> Any:
+        registry = build_registry(settings)
+        application.state.registry = registry
+        try:
+            yield
+        finally:
+            await registry.dispose()
+
+    application = FastAPI(
+        title="artifact-store",
+        version=__version__,
+        lifespan=lifespan,
+    )
+
+    @application.get("/")
+    def root() -> dict[str, str]:
+        return {
+            "service": "artifact-store",
+            "version": __version__,
+            "status": "scaffold",
+        }
+
+    @application.get("/health")
+    async def health(registry: Registry = Depends(get_registry)) -> dict[str, Any]:
+        db_ok, db_detail = await registry.db_health()
+        backend_status = await registry.backend_health()
+        overall = "ok" if db_ok and backend_status.healthy else "degraded"
+        return {
+            "service": "artifact-store",
+            "version": __version__,
+            "status": overall,
+            "db": {"healthy": db_ok, "detail": db_detail},
+            "backend": {
+                "backend_id": backend_status.backend_id,
+                "healthy": backend_status.healthy,
+                "detail": backend_status.detail,
+                "free_bytes": backend_status.free_bytes,
+                "total_bytes": backend_status.total_bytes,
+            },
+        }
+
+    return application
+
+
+app = create_app()

src/artifactstore/app.py

@@ -0,0 +1,27 @@
+"""Composition root: build the runtime registry from settings.
+
+The HTTP server, the CLI, and any future host all instantiate the
+:class:`Registry` through :func:`build_registry`. Wiring lives here so the
+control-plane consumers stay thin (per ADR-0004).
+"""
+
+from __future__ import annotations
+
+from artifactstore.config import Settings, get_settings
+from artifactstore.dataplane import InProcessDataPlane
+from artifactstore.db.engine import create_engine
+from artifactstore.events import RegistryViewWriter
+from artifactstore.registry import Registry
+from artifactstore.storage import LocalBackend
+
+__all__ = ["build_registry"]
+
+
+def build_registry(settings: Settings | None = None) -> Registry:
+    """Wire engine, local FS backend, in-process data plane, and registry."""
+    effective = settings or get_settings()
+    engine = create_engine(effective)
+    backend = LocalBackend(effective.storage_local_root, backend_id="local")
+    dataplane = InProcessDataPlane(backend)
+    view_writer = RegistryViewWriter()
+    return Registry(engine, dataplane, view_writer)

src/artifactstore/cli/__init__.py

@@ -1,15 +1,28 @@
 """artifact-store command-line interface.
 
 The CLI is a thin consumer of :mod:`artifactstore.registry` (per ADR-0005).
-The scaffold exposes only ``version``; richer subcommands land in later
+T014 ships ``version``, ``migrate``, ``replay``, and ``health`` subcommands;
-tasks of ARTIFACT-STORE-WP-0001 and follow-on workplans.
+richer subcommands (e.g. ``push``, ``manifest``) land alongside the HTTP API
+in WP-0002.
 """
 
 from __future__ import annotations
 
+import asyncio
+import json
+from pathlib import Path
+from typing import Any
+
 import typer
 
 from artifactstore import __version__
+from artifactstore.config import Settings, get_settings
+from artifactstore.db.engine import create_engine
+from artifactstore.events import RegistryViewWriter
+from artifactstore.events import replay as events_replay
+from artifactstore.registry import Registry
+
+__all__ = ["app"]
 
 app = typer.Typer(
     help="artifact-store: artifact registry and storage gateway",
@@ -19,11 +32,7 @@ app = typer.Typer(
 
 @app.callback()
 def main() -> None:
-    """Top-level CLI entry point.
+    """Top-level CLI entry point."""
-
-    Forces typer into multi-command mode so subcommands behave consistently
-    even while the scaffold only ships ``version``.
-    """
 
 
 @app.command()
@@ -32,5 +41,74 @@ def version() -> None:
     typer.echo(__version__)
 
 
+@app.command()
+def migrate(
+    alembic_ini: Path = typer.Option(
+        Path("alembic.ini"),
+        "--alembic-ini",
+        help="Path to alembic.ini (defaults to the repo root).",
+    ),
+) -> None:
+    """Run ``alembic upgrade head`` against the configured database."""
+    from alembic import command
+    from alembic.config import Config
+
+    cfg = Config(str(alembic_ini))
+    command.upgrade(cfg, "head")
+    typer.echo("alembic upgrade head: ok")
+
+
+@app.command()
+def replay() -> None:
+    """Truncate materialised views and replay every event from sequence 1."""
+    settings = get_settings()
+    last_seq = asyncio.run(_replay_async(settings))
+    typer.echo(f"replayed up to sequence {last_seq}")
+
+
+@app.command()
+def health() -> None:
+    """Print a JSON liveness summary (db, backend)."""
+    settings = get_settings()
+    payload = asyncio.run(_health_async(settings))
+    typer.echo(json.dumps(payload, indent=2))
+
+
+# ---- internals -------------------------------------------------------------
+
+
+async def _replay_async(settings: Settings) -> int:
+    engine = create_engine(settings)
+    try:
+        return await events_replay(engine, RegistryViewWriter(), reset=True)
+    finally:
+        await engine.dispose()
+
+
+async def _health_async(settings: Settings) -> dict[str, Any]:
+    from artifactstore.app import build_registry
+
+    registry: Registry = build_registry(settings)
+    try:
+        db_ok, db_detail = await registry.db_health()
+        backend_status = await registry.backend_health()
+    finally:
+        await registry.dispose()
+    overall = "ok" if db_ok and backend_status.healthy else "degraded"
+    return {
+        "service": "artifact-store",
+        "version": __version__,
+        "status": overall,
+        "db": {"healthy": db_ok, "detail": db_detail},
+        "backend": {
+            "backend_id": backend_status.backend_id,
+            "healthy": backend_status.healthy,
+            "detail": backend_status.detail,
+            "free_bytes": backend_status.free_bytes,
+            "total_bytes": backend_status.total_bytes,
+        },
+    }
+
+
 if __name__ == "__main__":  # pragma: no cover
     app()

src/artifactstore/registry/__init__.py

@@ -25,7 +25,7 @@ from typing import Any
 from uuid import UUID
 
 import cbor2
-from sqlalchemy import select
+from sqlalchemy import select, text
 from sqlalchemy.ext.asyncio import AsyncEngine
 
 from artifactstore.dataplane.spi import DataPlane
@@ -61,6 +61,7 @@ from artifactstore.manifest import (
 )
 from artifactstore.manifest.codec import decode as manifest_decode
 from artifactstore.manifest.projection import jcs_projection
+from artifactstore.storage.spi import BackendStatus
 
 __all__ = ["Registry"]
 
@@ -316,6 +317,29 @@ class Registry:
             poll_interval_seconds=poll_interval_seconds,
         )
 
+    # ---- health / lifecycle -------------------------------------------------
+
+    async def db_health(self) -> tuple[bool, str]:
+        """Probe the database with ``SELECT 1``.
+
+        Returns ``(healthy, detail)``; ``detail`` is "ok" on success and the
+        exception message on failure.
+        """
+        try:
+            async with self._engine.connect() as conn:
+                await conn.execute(text("SELECT 1"))
+        except Exception as exc:
+            return False, f"{type(exc).__name__}: {exc}"
+        return True, "ok"
+
+    async def backend_health(self) -> BackendStatus:
+        """Probe the configured storage backend through the data plane."""
+        return await self._dataplane.backend_health()
+
+    async def dispose(self) -> None:
+        """Release the engine's connection pool. Idempotent."""
+        await self._engine.dispose()
+
     # ---- internals ----------------------------------------------------------
 
     async def _validate_retention_class(self, retention_class: str) -> None:

tests/integration/test_cli_commands.py

@@ -0,0 +1,86 @@
+"""CLI command tests (ARTIFACT-STORE-WP-0001-T014)."""
+
+from __future__ import annotations
+
+import json
+from pathlib import Path
+
+import pytest
+from sqlalchemy import create_engine, insert, inspect
+from typer.testing import CliRunner
+
+from artifactstore.cli import app as cli_app
+from artifactstore.db.schema import metadata, retention_classes
+from artifactstore.db.seed import RETENTION_CLASS_SEEDS
+
+REPO_ROOT = Path(__file__).resolve().parents[2]
+
+
+@pytest.fixture
+def runner() -> CliRunner:
+    return CliRunner()
+
+
+@pytest.fixture
+def env_db(tmp_path: Path, monkeypatch: pytest.MonkeyPatch) -> Path:
+    db_path = tmp_path / "cli-test.db"
+    storage_root = tmp_path / "storage"
+    storage_root.mkdir(parents=True, exist_ok=True)
+    monkeypatch.setenv("ARTIFACTSTORE_DATABASE_URL", f"sqlite+aiosqlite:///{db_path}")
+    monkeypatch.setenv("ARTIFACTSTORE_STORAGE_LOCAL_ROOT", str(storage_root))
+    return db_path
+
+
+def test_cli_version_prints_version(runner: CliRunner) -> None:
+    result = runner.invoke(cli_app, ["version"])
+    assert result.exit_code == 0
+    assert result.output.strip()
+
+
+def test_cli_migrate_creates_schema(
+    runner: CliRunner,
+    env_db: Path,
+    monkeypatch: pytest.MonkeyPatch,
+) -> None:
+    monkeypatch.chdir(REPO_ROOT)
+    result = runner.invoke(cli_app, ["migrate"])
+    assert result.exit_code == 0, result.output
+    assert "ok" in result.output
+
+    sync_engine = create_engine(f"sqlite:///{env_db}", future=True)
+    names = set(inspect(sync_engine).get_table_names())
+    sync_engine.dispose()
+    assert {"events", "retention_classes", "alembic_version"}.issubset(names)
+
+
+def test_cli_replay_against_empty_log(
+    runner: CliRunner,
+    env_db: Path,
+) -> None:
+    # Pre-create schema (without using migrate command to keep the test
+    # focused on the replay surface).
+    sync_engine = create_engine(f"sqlite:///{env_db}", future=True)
+    metadata.create_all(sync_engine)
+    with sync_engine.begin() as conn:
+        conn.execute(insert(retention_classes), [dict(s) for s in RETENTION_CLASS_SEEDS])
+    sync_engine.dispose()
+
+    result = runner.invoke(cli_app, ["replay"])
+    assert result.exit_code == 0, result.output
+    assert "replayed up to sequence 0" in result.output
+
+
+def test_cli_health_reports_ok(
+    runner: CliRunner,
+    env_db: Path,
+) -> None:
+    sync_engine = create_engine(f"sqlite:///{env_db}", future=True)
+    metadata.create_all(sync_engine)
+    sync_engine.dispose()
+
+    result = runner.invoke(cli_app, ["health"])
+    assert result.exit_code == 0, result.output
+    payload = json.loads(result.output)
+    assert payload["status"] == "ok"
+    assert payload["db"]["healthy"] is True
+    assert payload["backend"]["healthy"] is True

tests/integration/test_http_health.py

@@ -0,0 +1,63 @@
+"""HTTP /health endpoint tests (ARTIFACT-STORE-WP-0001-T014)."""
+
+from __future__ import annotations
+
+from pathlib import Path
+
+import pytest
+from fastapi.testclient import TestClient
+from sqlalchemy import create_engine, insert
+
+from artifactstore.api.http import create_app
+from artifactstore.config import Settings
+from artifactstore.db.schema import metadata, retention_classes
+from artifactstore.db.seed import RETENTION_CLASS_SEEDS
+
+
+@pytest.fixture
+def settings(tmp_path: Path) -> Settings:
+    db_path = tmp_path / "http-test.db"
+    storage_root = tmp_path / "storage"
+    storage_root.mkdir(parents=True, exist_ok=True)
+    # Build a fresh schema synchronously so the app starts against a
+    # ready-to-use database.
+    sync_engine = create_engine(f"sqlite:///{db_path}", future=True)
+    metadata.create_all(sync_engine)
+    with sync_engine.begin() as conn:
+        conn.execute(insert(retention_classes), [dict(s) for s in RETENTION_CLASS_SEEDS])
+    sync_engine.dispose()
+    return Settings(
+        database_url=f"sqlite+aiosqlite:///{db_path}",
+        storage_local_root=str(storage_root),
+        log_level="INFO",
+    )
+
+
+def test_root_route_returns_banner(settings: Settings) -> None:
+    app = create_app(settings)
+    with TestClient(app) as client:
+        resp = client.get("/")
+    assert resp.status_code == 200
+    body = resp.json()
+    assert body["service"] == "artifact-store"
+    assert body["status"] == "scaffold"
+
+
+def test_health_endpoint_reports_db_and_backend(settings: Settings) -> None:
+    app = create_app(settings)
+    with TestClient(app) as client:
+        resp = client.get("/health")
+    assert resp.status_code == 200
+    body = resp.json()
+    assert body["status"] == "ok"
+    assert body["db"]["healthy"] is True
+    assert body["db"]["detail"] == "ok"
+    assert body["backend"]["healthy"] is True
+    assert body["backend"]["backend_id"] == "local"
+    assert body["backend"]["free_bytes"] is not None
+
+
+# NB: a "degraded backend" path test was considered but the LocalBackend
+# constructor recreates its root in mkdir(parents=True, exist_ok=True) when
+# the lifespan instantiates it. The unhealthy-root branch is covered
+# directly in tests/unit/test_storage_local.py without that re-creation.

workplans/ARTIFACT-STORE-WP-0001-service-baseline.md

@@ -262,7 +262,7 @@ Acceptance:
 
 ```task
 id: ARTIFACT-STORE-WP-0001-T014
-status: todo
+status: done
 priority: medium
 state_hub_task_id: "a43628ab-8b53-45fa-852a-ff0118dd12e7"
 ```