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+# TypeScript Conversion Status
+
+**Last updated:** March 9, 2026  
+**Branch:** `feature/page-prereqs-refactor`
+
+This document summarizes the Vue/Vuex → TypeScript conversion work done so far and what remains. Use it as context when resuming the conversion.
+
+---
+
+## Completed Work
+
+### 1. TypeScript Setup
+- **package.json:** Added `@vue/cli-plugin-typescript`, `@typescript-eslint/parser`, `@babel/preset-typescript`, `@popperjs/core` (Bootstrap peer dep)
+- **tsconfig.json:** Created with Vue/JS compatibility
+- **jest.config.js:** Configured to transform `.ts` files
+- **babel.config.js:** Added `@babel/preset-typescript`
+- **vue.config.js:** Entry override removed so Vue CLI uses `main.ts`
+
+### 2. Store Conversion
+- **src/store/index.js → src/store/index.ts:** Full conversion with `createStore<RootState>({...})`
+- **src/store/types.ts:** New file defining:
+  - `RootState`, `OrderState`, `VehicleState`, `DamageState`, `ServiceLocationState`, `ScheduleState`, `CustomerState`, `LineItemsState`, `PaymentState`, `ApplicationUserState`, etc.
+  - `FlexibleRecord` = `{ [key: string]: any }` — used for dynamic API responses (e.g. `updateStateWithOrderInformation`) where structure is not fully known
+  - `LineItemWithTax` and related types for line-item mapping
+
+### 3. Vue Module Augmentation
+- **src/shims-vue.d.ts:** Declares `this.$store` as `Store<RootState>` and extends `Window` for `$`/`jQuery`
+
+### 4. Main Entry
+- **src/main.js → src/main.ts:** Converted; Vue CLI entry points to `main.ts`
+
+### 5. Mutations Typed
+All mutations now use `(state: RootState, payload?: TypedPayload)`:
+- Vehicle: `updateYear`, `updateMake`, `updateModel`, `updateStyle`, `updateVehicleVin`, `updateVehicle`, `updateRegistration`, `resetVehicleState`, etc.
+- Damage: `updateIsRepair`, `updateNumberOfChips`, `updateGlassToReplace`, `updatePartQuestionAnswers`, etc.
+- Service location, customer, schedule: `updateServiceZip`, `updateServiceLocation`, `updateSchedule`, `updateCustomerDetails`, etc.
+- Line items, payment, referral, application user: `updateGlassParts`, `updateVaps`, `updatePageData`, etc.
+- RESET mutations: `resetState`, `resetVehicleState`, `resetDamageState`, `resetSchedule`, etc.
+- Misc: `updateStateWithOrderInformation`, `updateExperiments`, `updateTriggeredSiteEntry`, `updateAffiliateCookies`, `updateHasTriggeredError`
+
+### 6. Other Fixes
+- **src/global-methods.js:** `additionalSuccessEventDataHandler = undefined`, `payload = {}` as defaults for optional params
+- **store/index.ts:** Fixed `methods` → `method` in four `callHttpClient` calls
+- **store/types.ts:** `savedSessionTimeout` typed as `string | null` (matches `getDateForSavedSessionTimeout()`)
+- **store/types.ts:** `cashPriceSubTotal` added to `OrderState`
+- **store/index.ts:** `updateBillToAcctNumber` parameter typed
+- **store/index.ts:** `updateStateWithOrderInformation` uses `FlexibleRecord` for `order` and `applicationUser` from session API
+- **store/index.ts:** `resetSchedule` callback typed as `(item: { partType?: string }) => ...`
+
+### 7. Test Status
+- **Store tests:** 139 passing (`npm run test:unit:lite -- --testPathPattern=store.spec --runInBand`)
+
+---
+
+## Remaining Work
+
+### Phase 3e — Type Actions
+- Add `ActionContext<RootState, RootState>` to store actions
+- Add payload types for action parameters
+- Typed return values where applicable
+
+### Step 4 — Fix Remaining Test Failures
+- Some specs may have import issues (e.g. `base-input-button`)
+- Run full test suite and fix any failures
+
+### Build Verification
+- Confirm `npm run build` completes successfully
+- Last run was still in progress; verify no TypeScript errors
+
+### Optional / Future
+- Convert more `.js` files to `.ts` (e.g. `global-methods.js`, `constants/store-actions.js`, `constants/store-mutations.js`, mixins)
+- Add stricter typing where beneficial
+- Consider converting Vue SFCs to `<script lang="ts">` incrementally
+
+---
+
+## Key Files
+
+| File | Notes |
+|------|-------|
+| `src/store/index.ts` | Main Vuex store (converted) |
+| `src/store/types.ts` | RootState and sub-state types, FlexibleRecord |
+| `src/shims-vue.d.ts` | Vue module augmentation for $store |
+| `src/main.ts` | App entry point |
+| `tsconfig.json` | TypeScript config |
+
+---
+
+## Useful Commands
+
+```bash
+# Run store tests
+npm run test:unit:lite -- --testPathPattern=store.spec --runInBand
+
+# Full build
+npm run build
+
+# Type check only (if vue-tsc available)
+npx vue-tsc --noEmit
+```
+
+---
+
+## Gotchas
+
+1. **FlexibleRecord:** Uses `any` for nested values to allow assigning dynamic API responses to typed state. ESLint disable for `no-explicit-any` is intentional on that type.
+
+2. **Session API:** `updateStateWithOrderInformation` receives `sessionInformation.order` and `sessionInformation.applicationUser` from the Session API. Structure is dynamic; casting to `FlexibleRecord` enables property access without dozens of explicit casts.
+
+3. **PowerShell:** Use `;` not `&&` for chaining commands.
+
+4. **Store actions:** Still untyped; they use `context` and payloads without `ActionContext` or payload interfaces.