printedparts stage 1: scaffold, no AssetType, manifest per spec

flask plugin new output, minus the scaffold's AssetType seeding:
printed parts are quantity-based consumables, not ADR-001 assets.
on_install seeds the three plugin settings instead. Manifest pins
core >=0.11.0, depends on employees (badge name resolution), ships
disabled until a site opts in.

plugins/printedparts/README.md

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+# Printedparts plugin
+
+3D-printed parts inventory + kiosk checkout
+
+This plugin was generated by `flask plugin new printedparts`. It satisfies the framework contract out of the box. Replace the example model and routes with your domain.
+
+## What's here
+
+- `plugin.py` - the `PrintedpartsPlugin` class extending `BasePlugin`. Edit `init_app` for custom setup, `on_install` to seed reference data.
+- `models/printedparts.py` - example Asset extension table. Replace `examplefield` with your domain fields.
+- `api/routes.py` - example list and detail endpoints. Add CRUD as needed.
+- `schemas/__init__.py` - marshmallow schema stub for request/response validation.
+- `tests/test_plugin.py` - smoke tests asserting contract compliance.
+- `manifest.json` - plugin metadata. Bump `version` on changes; keep `core_version` range broad.
+
+## Common edits
+
+| You want to... | Do this |
+|---|---|
+| Add a hook (search, navigation, dashboard widget) | Override the method in `PrintedpartsPlugin`. See `docs/PLUGIN-HOOKS.md`. |
+| Accept external collector data | Override `get_collector_schema()` to return a JSON Schema. See ADR-006. |
+| Add another model | Create `models/<other>.py`, export it in `models/__init__.py`, return it in `get_models()`. |
+| Add a CLI command | Override `get_cli_commands()` returning a list of Click commands. |
+
+## Frontend
+
+Vue components for this plugin live under `frontend/src/views/printedparts/` (per project convention). Backend scaffolding does not generate frontend yet; copy from an existing plugin's view files (e.g., `frontend/src/views/network/`) as a starting point.
+
+## Install and run
+
+```bash
+flask plugin install printedparts
+flask db migrate -m "Add printedparts plugin tables"
+flask db upgrade
+pytest plugins/printedparts/tests/
+```
+
+## References
+
+- `docs/PLUGIN-HOOKS.md` - canonical hook reference
+- `docs/PLUGIN-QUICKSTART.md` - 30-minute walkthrough
+- `migrations/adr/ADR-001-asset-as-platform-contract.md` - the platform contract
+- `migrations/adr/ADR-002-plugin-versioning.md` - versioning rules

plugins/printedparts/__init__.py

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+"""Printedparts plugin package."""
+
+from .plugin import PrintedpartsPlugin
+
+__all__ = ['PrintedpartsPlugin']

plugins/printedparts/api/__init__.py

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+"""Printedparts plugin API package."""
+
+from .routes import printedparts_bp
+
+__all__ = ['printedparts_bp']

plugins/printedparts/api/routes.py

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+"""Printedparts plugin API routes."""
+
+from flask import Blueprint, request
+from flask_jwt_extended import jwt_required
+
+from shopdb.api import (
+    success_response,
+    error_response,
+    paginated_response,
+    ErrorCodes,
+    get_pagination_params,
+    paginate_query,
+)
+
+from ..models import Printedparts
+
+
+printedparts_bp = Blueprint('printedparts', __name__)
+
+
+@printedparts_bp.route('', methods=['GET'])
+@jwt_required(optional=True)
+def list_printedparts():
+    """List printedparts assets, paginated."""
+    page, per_page = get_pagination_params(request)
+
+    query = Printedparts.query
+    items, total = paginate_query(query, page, per_page)
+    data = [item.to_dict() for item in items]
+
+    return paginated_response(data, page, per_page, total)
+
+
+@printedparts_bp.route('/<int:assetid>', methods=['GET'])
+@jwt_required(optional=True)
+def get_printedparts(assetid: int):
+    """Get a single printedparts by assetid."""
+    item = Printedparts.query.get(assetid)
+    if not item:
+        return error_response(
+            ErrorCodes.NOT_FOUND,
+            f'Printedparts with assetid {assetid} not found',
+            http_code=404,
+        )
+    return success_response(item.to_dict())

plugins/printedparts/frontend-api-snippet.js

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+/*
+ * Printedparts API client snippet.
+ *
+ * Paste this printedpartsApi block into frontend/src/api/index.js (next to the
+ * other per-resource blocks). Then, in the generated PrintedpartsList, PrintedpartsDetail,
+ * and PrintedpartsForm views, delete the local printedpartsApi const and import the shared
+ * one instead:
+ *
+ *   import { printedpartsApi } from '../../api'
+ *
+ * The scaffolded views ship with an identical inline client so they build and
+ * run before you touch the shared api module. This file is NOT auto-merged into
+ * api/index.js on purpose; that module is hand-maintained and shared.
+ *
+ * The create/update/delete calls assume matching POST/PUT/DELETE routes exist
+ * on the backend. The scaffolded api/routes.py only ships list and get; add the
+ * write endpoints when you wire up the form.
+ */
+export const printedpartsApi = {
+  list(params = {}) {
+    return api.get('/printedparts', { params })
+  },
+  get(itemId) {
+    return api.get(`/printedparts/${itemId}`)
+  },
+  create(data) {
+    return api.post('/printedparts', data)
+  },
+  update(itemId, data) {
+    return api.put(`/printedparts/${itemId}`, data)
+  },
+  remove(itemId) {
+    return api.delete(`/printedparts/${itemId}`)
+  }
+}

plugins/printedparts/manifest.json

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+{
+    "name": "printedparts",
+    "version": "0.1.0",
+    "description": "3D-printed parts inventory + kiosk checkout",
+    "display_name": "3D Printed Parts",
+    "author": "",
+    "dependencies": ["employees"],
+    "core_version": ">=0.11.0,<1.0.0",
+    "api_prefix": "/api/printedparts",
+    "default_enabled": false
+}

plugins/printedparts/models/__init__.py

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+"""Printedparts plugin models."""
+
+from .printedparts import Printedparts
+
+__all__ = ['Printedparts']

plugins/printedparts/models/printedparts.py

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+"""Printedparts model.
+
+This is an Asset extension table keyed by assetid. The Asset row holds
+the platform fields (assetnumber, name, vendorid, locationid, etc.);
+this table holds the printedparts-specific fields. Replace the example fields
+below with your domain model.
+"""
+
+from shopdb.api import db, BaseModel
+
+
+class Printedparts(BaseModel):
+    """Printedparts domain entity, extending Asset by assetid."""
+
+    __tablename__ = 'printedparts'
+
+    assetid = db.Column(
+        db.Integer,
+        db.ForeignKey('assets.assetid', ondelete='CASCADE'),
+        primary_key=True,
+    )
+
+    # TODO: replace these example fields with your domain fields.
+    examplefield = db.Column(db.String(255), nullable=True)
+
+    asset = db.relationship('Asset', backref=db.backref('printedparts', uselist=False))
+
+    def to_dict(self):
+        return {
+            'assetid': self.assetid,
+            'examplefield': self.examplefield,
+        }

plugins/printedparts/plugin.py

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+"""Printedparts plugin main class.
+
+3D-printed parts inventory + kiosk checkout. Quantity-based consumables:
+one row is a KIND of part with a count, not an individually tracked asset,
+so unlike most plugins this one seeds NO AssetType (ADR-001 assets are
+one-row-per-physical-thing). See docs/proposals/printedparts-plugin.md.
+"""
+
+import json
+import logging
+from pathlib import Path
+from typing import List, Optional, Type
+
+from flask import Flask, Blueprint
+
+from shopdb.plugins.base import BasePlugin, PluginMeta
+from shopdb.api import db, Setting
+
+from .models import Printedparts
+from .api import printedparts_bp
+
+logger = logging.getLogger(__name__)
+
+
+class PrintedpartsPlugin(BasePlugin):
+    """3D-printed parts inventory + kiosk checkout."""
+
+    def __init__(self):
+        manifest_path = Path(__file__).parent / 'manifest.json'
+        with open(manifest_path) as f:
+            self._manifest = json.load(f)
+
+    @property
+    def meta(self) -> PluginMeta:
+        return PluginMeta(
+            name=self._manifest['name'],
+            version=self._manifest['version'],
+            description=self._manifest['description'],
+            author=self._manifest.get('author', ''),
+            dependencies=self._manifest.get('dependencies', []),
+            core_version=self._manifest.get('core_version', '>=0.1.0'),
+            api_prefix=self._manifest.get('api_prefix'),
+        )
+
+    def get_blueprint(self) -> Optional[Blueprint]:
+        return printedparts_bp
+
+    def get_models(self) -> List[Type]:
+        return [Printedparts]
+
+    def init_app(self, app: Flask, db_instance) -> None:
+        logger.info(f'Printedparts plugin initialized (v{self.meta.version})')
+
+    def on_install(self, app: Flask) -> None:
+        with app.app_context():
+            self._seed_settings()
+            logger.info('Printedparts plugin installed')
+
+    def _seed_settings(self) -> None:
+        defaults = [
+            ('printedparts_code_prefix', '3DP', 'string',
+             'Prefix for generated item codes'),
+            ('printedparts_default_threshold', '5', 'integer',
+             'Default low-stock threshold for new items'),
+            ('printedparts_unknown_badge', 'deny', 'string',
+             'Kiosk policy when a badge resolves to no employee: allow or deny'),
+        ]
+        for key, value, valuetype, description in defaults:
+            if Setting.get(key) is None:
+                Setting.set(key, value, valuetype=valuetype,
+                            category='printedparts', description=description)
+        db.session.commit()

plugins/printedparts/schemas/__init__.py

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+"""Printedparts plugin schemas (marshmallow).
+
+Add schema classes here when you need request/response validation
+beyond the simple to_dict() output. The framework wires marshmallow
+into the response helpers; see docs/PLUGIN-HOOKS.md for details.
+"""

plugins/printedparts/tests/test_plugin.py

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+"""Printedparts plugin smoke tests.
+
+Asserts the plugin loads cleanly and satisfies the framework contract.
+Replace and extend with domain tests as you build the plugin out.
+"""
+
+from plugins.printedparts.plugin import PrintedpartsPlugin
+
+
+def test_printedparts_plugin_meta_is_valid():
+    """PrintedpartsPlugin.meta returns a PluginMeta with the expected name."""
+    plugin = PrintedpartsPlugin()
+    assert plugin.meta.name == 'printedparts'
+    assert plugin.meta.api_prefix == '/api/printedparts'
+
+
+def test_printedparts_plugin_get_blueprint_returns_blueprint():
+    """get_blueprint returns a Flask Blueprint, not None."""
+    from flask import Blueprint
+    plugin = PrintedpartsPlugin()
+    assert isinstance(plugin.get_blueprint(), Blueprint)
+
+
+def test_printedparts_plugin_get_models_returns_a_model():
+    """get_models returns a list with at least one SQLAlchemy model."""
+    plugin = PrintedpartsPlugin()
+    models = plugin.get_models()
+    assert len(models) >= 1
+    for model in models:
+        assert hasattr(model, '__tablename__')