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Plan 1 of fusion_maintenance, verified on the Westin Enterprise sandbox (westin-fr-test) via odoo shell. Maintenance policy (enabled/interval/flat fee/service product) on the equipment category + per-product fee override; contract gains fee/source/serial/policy/currency; fixed the dead _spawn_maintenance_contracts and wired it into the existing action_confirm (delivery-date anchor w/ fallback, two-regime serial dedup, fee resolution product->category); reminder email shows the flat fee; category form exposes the policy. Verified: trigger creates 1 priced contract (fee 149, next_due commitment+6mo, source=sale); idempotent on re-confirm; product override beats category; no contract when category not maintainable; fee renders as $149.00. v19.0.2.3.0. NOTE: mail_template_data.xml is noupdate=1 -> the fee line loads on fresh install (the prod deploy) but NOT on -u of an already-installed system. The Westin prod-config test container (workers + log_level=warn) does not run --test-enable post_install tests (a pre-existing module load issue under the test phase), so behaviour was verified by odoo shell instead. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>