Hardens the plugin framework so sister-site adoption is safe.
Loader rewrite (shopdb/plugins/loader.py):
- Reads manifest.json directly. Dependency sort and version checks
no longer instantiate plugin classes (avoids __init__ side effects).
- Fail-loud policy: in dev/test (DEBUG or TESTING true), plugin
errors re-raise. In production, errors log with full context and
the plugin is excluded from registration. Framework keeps booting.
- Contract-version range check via packaging.SpecifierSet. Plugin's
manifest.core_version must include the framework's
__contract_version__ or load fails per the policy above.
- Manifest validation: required fields (name, version, description),
name matches directory, JSON parseable.
Exceptions (shopdb/exceptions.py):
- PluginNotFoundError, PluginContractError, PluginVersionError,
PluginDependencyError. Specific types replace generic Exception
swallowing.
Auto-register core blueprints (shopdb/__init__.py):
- CORE_BLUEPRINT_NAMES tuple drives registration. Adding a core
resource is one entry, not three lines (import + register call).
- Replaces 27 hand-coded register_blueprint calls.
- Asserts each blueprint is exported by shopdb.core.api at boot.
Public API namespace (shopdb/api/__init__.py):
- audit_log: thin wrapper over AuditLog.log() with stable signature.
- resolve_asset_position: implements ADR-001 position resolution
(asset > related > location). Asset.mapx/mapy and
AssetRelationship.inheritsposition columns are part of the locked
contract surface but not yet in models; helper degrades gracefully
to location-only fallback until the migration lands.
BasePlugin helpers (shopdb/plugins/base.py):
- get_setting(key, default), set_setting(key, value, ...). Settings
namespaced as plugin.<pluginname>.<key> so two plugins can use the
same key without colliding.
Manifest version compatibility (plugins/*/manifest.json):
- Bumped core_version from ">=1.0.0" to ">=0.1.0,<1.0.0" so all
bundled plugins satisfy the new range check.
Contract version bump (shopdb/__init__.py):
- 0.1.0 -> 0.2.0. Additive surface change (Setting helpers,
shopdb.api namespace) per ADR-002 minor-bump rules.
Tests (tests/test_plugin_loader.py, tests/test_api_namespace.py):
- 13 loader tests: manifest validation failures, version range
checks, plugin.py import errors, strict-vs-isolate behavior under
TESTING vs production-like config, manifest-first dependency sort.
- 8 api-namespace tests: audit_log roundtrip, resolve position
fallback chain, plugin.get_setting/set_setting roundtrip with
per-plugin namespacing.
Test count: 66 -> 87 passing.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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