In-park merchants discharge customers' parking: a merchant user scans the
ticket on their device (/validate; validation:create + program↔user binding)
and applies their program — comp / first-N-minutes free / amount-off (capped,
typed at scan) / percent. All money stays at the booth: the quote folds live
validations in a canonical order (timeCredit → percent → fixed → comp, net
floors at 0, Σ lines ≡ gross − net), the payment records gross/discount and
CONSUMES the validation ids (an overstay's fresh period never re-applies
them), the receipt prints the gross → lines → net story, and the Z/X-report
carries discountTotalMinor leakage. Every apply/void is a signed, attributed
ledger event (refId = append-only void); program config is /setup/site master
data (Bar/Lavazh checkboxes + right-column panel, tabs when both) whose saves
sign config_change. Migration 0024 + reset-db drift-guard entries; 8 route
integration tests + priceSession fold suite.
See wiki/concepts/validation-discounts.md for the full design record.
Claude-Session: https://claude.ai/code/session_01YYkpEsLmoQPaize5ec3oUm
Both tables belonged to NO reset category and silently survived every
reset, --all included (the hand-maintained table list lagged the schema
twice). app_logs gets a new --diagnostics category; tariff_drafts joins
--config. A drift guard now compares the category union against
sqlite_master before doing anything and refuses on any uncategorized
table, so the next new table forces a deliberate one-line decision instead
of escaping by omission. Verified on a scratch DB: guard refuses a planted
table (exit 1), --all lists both new tables, --diagnostics wipes app_logs.
Claude-Session: https://claude.ai/code/session_01Xcm6ikLgGoCxxHrxtjkk5V
A site is sometimes run live to train operators/admins; afterwards the demo
data must go without an obvious self-serve button (the operator must not be
able to wipe history). Adds packages/db/scripts/reset-db.mjs, exposed as
`pnpm db:reset` (dev) and run via `docker exec ... node
node_modules/@parking/db/scripts/reset-db.mjs` on the booth (no pnpm there).
Category flags (combinable): --financial (ledger + telemetry + snapshots +
subscription instances + blocklist; keeps users/devices/config/tariffs/plans),
--config, --users, --all. Shifts/cash/payments live as event types inside the
hash-chained ledger_events, so --financial truncates the whole signed ledger
back to empty (re-seed starts a new chain under the SAME EVENT_SIGNING_KEY —
keys untouched).
Two safety gates: RESET_ALLOWED=1 env (a real booth never sets it) + typed
DB-filename confirmation (--yes skips for CI). Single transaction + VACUUM.
Verified on throwaway dev-DB copies: both gates refuse correctly; each flag
wipes/keeps the right tables; the real dev DB is never touched.
Claude-Session: https://claude.ai/code/session_01Xcm6ikLgGoCxxHrxtjkk5V
julian