Remove all SaaS billing code from HoldFast

[BrewingCoder]

Summary

HoldFast is self-hosted only with no SaaS model. The upstream Highlight.io billing code was partially stubbed but never fully removed. This tracking issue covers the complete removal of all billing-related code.

Principle: Remove one element at a time, trace usage up the stack to the frontend, branch per issue, and verify with passing tests before merging.

Billing Elements to Remove

Backend Model Layer (do in order)

• Remove SendBillingNotifications, BillingEmailHistory, and emailHistoryCache #26 — SendBillingNotifications + BillingEmailHistory + emailHistoryCache
• Remove AWSMarketplaceCustomer model #27 — AWSMarketplaceCustomer model
• Remove pricing package and quota checking system #28 — pricing.go types + pricing/ package + quota checking ⚠️ largest blast radius
• Remove Workspace Stripe fields #29 — Workspace Stripe fields (depends on Remove pricing package and quota checking system #28)
• Remove Workspace billing period fields #30 — Workspace billing period fields (depends on Remove pricing package and quota checking system #28)
• Remove Workspace monthly limit and max cents fields #31 — Workspace limit fields (6x Monthly*Limit, 5x *MaxCents) (depends on Remove pricing package and quota checking system #28)
• Remove Workspace trial fields and trial extension logic #32 — Workspace trial fields + frontend trial banner
• Remove AllowMeterOverage and CanShowBillingIssueBanner #33 — AllowMeterOverage + CanShowBillingIssueBanner
• Remove PromoCode field and hardcoded PromoCodes map #34 — PromoCode field + hardcoded PromoCodes map

Email / SendGrid

• Remove billing email types and SendGrid integration #35 — Billing email types + SendGrid integration (depends on Remove SendBillingNotifications, BillingEmailHistory, and emailHistoryCache #26)

Frontend (do last)

• Remove frontend billing pages and trial UI components #36 — Billing pages, trial banners, generated GraphQL billing types

Suggested Order

1. Remove SendBillingNotifications, BillingEmailHistory, and emailHistoryCache #26 (SendBillingNotifications) — standalone, low risk
2. Remove AWSMarketplaceCustomer model #27 (AWSMarketplaceCustomer) — standalone, low risk
3. Remove PromoCode field and hardcoded PromoCodes map #34 (PromoCode) — standalone, low risk
4. Remove AllowMeterOverage and CanShowBillingIssueBanner #33 (AllowMeterOverage + banner) — standalone, low risk
5. Remove pricing package and quota checking system #28 (pricing/quota) — biggest change, unblocks Remove Workspace Stripe fields #29, Remove Workspace billing period fields #30, Remove Workspace monthly limit and max cents fields #31
6. Remove Workspace Stripe fields #29 (Stripe fields) — after Remove pricing package and quota checking system #28
7. Remove Workspace billing period fields #30 (billing periods) — after Remove pricing package and quota checking system #28
8. Remove Workspace monthly limit and max cents fields #31 (limits/cents) — after Remove pricing package and quota checking system #28
9. Remove Workspace trial fields and trial extension logic #32 (trial fields) — touches frontend
10. Remove billing email types and SendGrid integration #35 (email/SendGrid) — after Remove SendBillingNotifications, BillingEmailHistory, and emailHistoryCache #26
11. Remove frontend billing pages and trial UI components #36 (frontend) — after all backend done

Related Issues

• Improve code documentation and unit testing for model package #17 — Model package tech debt (parent)

🤖 Generated with Claude Code

[github-actions]

AI Triage: Remove all unused SaaS billing code from the self-hosted HoldFast platform, including backend models, Stripe fields, pricing logic, and frontend billing pages.

Labels applied: tech-debt, billing-removal, area:backend, priority:medium, component:database