tegwick
28ec2922d3
src/artifactstore/storage/:
- spi.py: StorageBackend Protocol (backend_id, put, get, head, delete,
health) and result dataclasses (StorageReceipt, StorageObjectMetadata,
DeletionResult, BackendStatus). ObjectNotFoundError exception type.
- registry.py: backend lookup by string ID (register/get/list_backends/
clear) per ADR-0004.
- backends/local.py: LocalBackend implementation.
* Object layout <root>/<algorithm>/<hex[0:2]>/<hex[2:4]>/<hex>.
* Atomic writes: tmpfile + fsync + rename (idempotent re-puts drain the
stream without rewriting).
* Defence in depth: resolves the final path and asserts it remains under
the configured root.
* Range reads honour HTTP-style inclusive (start, end) tuples.
* health() returns disk usage via shutil.disk_usage and surfaces an
unhealthy status when the root has disappeared.
* delete() cleans up emptied shard directories opportunistically.
tests/unit/test_storage_local.py (14 cases): put/get round-trip; object
key layout matches blueprint; head returns metadata; head/get missing
raise ObjectNotFoundError; put is idempotent; delete returns True then
False; range read returns subrange; range read rejects invalid range;
health reports disk usage; health reports unhealthy when root vanished;
ContentAddress validation blocks path-traversal-flavoured inputs;
registry register/get/list/clear round-trip; idempotent re-put leaves
bytes intact.
Gates: ruff clean, mypy --strict clean on 41 files, 59 tests pass.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
artifact-store
Generic artifact registry and storage gateway for generated outputs, evidence packages, reports, logs, snapshots, exports, and release artifacts.
The registry owns artifact identity, metadata, provenance, retention policy, and retrieval records. Bytes are delegated to configured storage backends (local filesystem in v1, S3-compatible / Ceph RGW next).
The shape is library-first (artifactstore Python package); the HTTP
server and the CLI are thin consumers. Content is addressed by digest;
state is authoritative in an append-only event log; materialised views
are rebuildable.
Status
Scaffold landed. The core kernels and local FS backend follow in the remaining tasks of WP-0001.
Develop
Requires Python ≥ 3.12 and uv on the path.
make install # uv sync --all-extras
cp .env.example .env
make dev # uvicorn artifactstore.api.http:app --reload
make test # pytest
make lint # ruff check + ruff format --check
make type # mypy --strict
make migrate # alembic upgrade head (configured in WP-0001-T002)
The dev server listens on 127.0.0.1:8000. The scaffold root route
returns {"service": "artifact-store", "status": "scaffold"}; the real
/health endpoint lands in WP-0001-T014.
Documentation
- INTENT.md — purpose, product thesis, scope, boundary.
- SCOPE.md — lightweight orientation.
- docs/ARCHITECTURE-BLUEPRINT.md — v2 architecture: modules, data model, API shape.
- docs/PLATFORM-AMBITION.md — longer-horizon thesis and v1 schema commitments.
- docs/ROADMAP.md — workplan sequencing across phases.
- docs/adr/ — architecture decision records.
- docs/ASSEMBLY-EXPERIMENT.md — opt-in research line on hand-tuned asm for hot kernels.
Active workplans
- WP-0001 — Foundation: scaffold, core kernels, local FS backend
- WP-0002 — Ingestion API and manifest surface (planned)
- WP-0003 — Retention lifecycle (planned)
- WP-0004 — S3-compatible backend (planned)
- WP-0005 — Guide-board pilot ingestion (planned)
Agent operating notes
See AGENTS.md for the StateHub-integrated session protocol, workplan conventions, and progress-logging contract.