price_per_unit was a Monetary field, so a realistic sub-cent rate like
$0.0075/core-hour was rounded to $0.01 on write, corrupting the rate.
Make it Float(16,6). Also stop _compute_billable from rounding the
overage amount to 2 decimals mid-calc — that lost the half-cent on
sub-cent rates and would drift against the source app, which keeps
usage amounts at 4 decimals and only rounds at the invoice total.
Now rounds to 6 dp (float-noise only); cent-rounding defers to the
invoice line. Exposed while building the NexaCloud importer.
Centralize billing for all NexaSystems services (NexaCloud, NexaDesk,
NexaMaps, custom apps, memberships) on the Odoo 19 Enterprise instance,
replacing Lago. The module adds only the metering + integration layer;
native sale_subscription / account_accountant / payment_stripe do all the
financial work (invoicing, HST, dunning, portal, credit notes, Stripe).
Includes:
- Design spec (docs/superpowers/specs/2026-05-27-nexa-billing-centralized-design.md):
6 locked decisions, architecture, data model, usage engine, Lago-shaped
API, webhook control loop, NexaCloud pilot, phased dual-run migration.
- Module scaffold: 7 fusion.billing.* models (service, account.link, metric,
charge, usage, webhook, reconciliation), bearer-auth API controller shell,
security ACLs, README. Compiles on Odoo 19.0; engine/API bodies are stubs
pending the implementation plan.
- CLAUDE.md rule #15: no sale.subscription model in Odoo 19 — a subscription
is a sale.order(is_subscription) + sale.subscription.plan (verified live).
Task 0 verified: a single Stripe account is shared across NexaCloud and all
Lago providers, so no Stripe account/card migration is required.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
