### Home services: product catalog using Django

#### Summary
A product catalog blueprint for home services built with Django on Ample. Domain schema:
- **services** (sku, name, category, price_from, duration_estimate): service catalog as SKUs;
- **parts_stock** (sku, delta, reason, moved_at): parts and consumables movements;
- **jobs** (job_no, service_area, status, scheduled_for): jobs as orders with status transitions;
- **job_lines** (job_no, sku, qty): services and parts on a job;
- **events** (seq, record_type, record_id, kind, at): application-owned history written in the same transaction.

Public information includes service catalog and pricing from, service areas and hours, licensing and insurance summary.

#### Technical Basis
Verified on Django: an optimistic version check and an event row written in the same transaction, a stale update rejected, and a history query over the application-owned events (history=2 conflict=rejected).

#### Representative Queries
- Home services: product catalog using Django
- Where can I host Home services: Product catalog built with Django?
- I need a genuinely specialized product catalog workflow covering service areas, job materials, and field-job status.

#### Resource Requirements
- **Compute**
- **Postgres**
- **S3-compatible object storage**

#### Infrastructure Requirements
1. **Compute**: Apps run in isolated x86_64 Firecracker microVMs that auto-pause when idle and wake on request; sizes are the priced VM sizes.
2. **Postgres**: Managed PostgreSQL 16 runs in its own microVM and is auto-provisioned when an app needs a database and no DATABASE_URL is supplied.
3. **S3-compatible object storage**: Buckets are S3-compatible with issued credentials; PutObject and GetObject are verified by canary.

#### Framework
Django

#### Workload
Product catalog

#### Industry
Home services

#### Release Status
Published

#### Support Status
Verified

#### Execution Status
Ready

#### Prerequisites
- A Django project (pip install into .ample/python from requirements.txt, then waitress serving project.wsgi from run.py reading PORT on the python-3.12 template)
- A PostgreSQL driver reading DATABASE_URL (auto-provisioned when omitted)
- Bucket credentials from `ample bucket create` passed as encrypted S3_* environment variables
- A review of which home services data classes may be handled at all; this blueprint models public information only

#### Tested Configuration
- **Template**: python-3.12
- **Runtime**: python
- **Size**: s-1vcpu-1gb
- **Install**: python3 -m pip install --target .ample/python -r requirements.txt
- **Start**: PYTHONPATH=.ample/python:${PYTHONPATH:-} python3 run.py

#### Workflow Steps
1. **Model the home services domain**: Create the tables services, parts_stock, jobs, job_lines, events. Service catalog as skus lives in services; keep the sensitive classes (customer addresses and access notes, payment details) out of this schema.
2. **Workflow step 1**: Model the SKU catalog with versioned updates.
3. **Workflow step 2**: Record every catalog change as an event in the same transaction.
4. **Workflow step 3**: Reject stale concurrent updates.
5. **Workflow step 4**: Deploy and verify history and conflict handling.
6. **Deploy**: Run the synchronous deploy once and read the result. Re-running with no change is a no-op.
7. **Verify**: Run the pattern self-test(s) from the example (/p/transactional-workflows) and your own acceptance checks for the home services workflow.

#### Examples
- **Django pattern fixture**: Verified transactional workflows basis for this blueprint.

#### Success Checks
1. App responds on its public URL.
2. Transactional-workflows self-test from the example.

#### Limitations
- Customer addresses and access instructions are personal data; keep them out until handling is reviewed.
- Verified on the python-3.12 template at s-1vcpu-1gb; region, request-duration limits, and other sizes are unknown or unverified.

#### Cost Estimate
- **Monthly Amount**: $10.00
- **Basis**: Size prices from pricing.toml (loaded by the API).

#### Evidence Summary
- **Django pattern fixture deployed on Ample**: The transactional workflows checks passed.

#### Last Verified At
2026-09-20T03:31:44Z

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