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Myra v0.1 Update Report

Date: 2026-02-18

Summary

Implemented Phase 1 foundation as a mobile-first React Native app plus an Express backend API, removed specific retailer branding from the primary web entry file, added environment/version artifacts, and completed verification + security review.

Completed

  • Implemented Phase 1 mobile app scaffold in /mobile (Expo + TypeScript strict).
  • Implemented required screens:
    • Splash: mobile/src/screens/SplashScreen.tsx
    • Home: mobile/src/screens/HomeScreen.tsx
    • Results: mobile/src/screens/ResultsScreen.tsx
    • History: mobile/src/screens/HistoryScreen.tsx
    • Settings: mobile/src/screens/SettingsScreen.tsx
  • Added free-form recommendation workflow:
    • Query input on Home screen
    • API call abstraction in mobile/src/services/api.ts
    • Top 3 structured cards in Results screen
  • Added local-only recommendation history via AsyncStorage:
    • mobile/src/services/historyStorage.ts
  • Added optional location foundation for nearby stores:
    • Permission + Google Maps handoff in mobile/src/utils/location.ts
  • Implemented backend API in /backend:
    • POST /parse-intent
    • POST /recommend
    • Input sanitization and validation (backend/src/services/intentParser.ts)
    • Deterministic scoring/recommendation engine (backend/src/services/recommendationEngine.ts)
    • Structured response format as required
  • Added deployment/runtime configuration artifacts:
    • VERSION set to v0.1
    • .env.example
  • Removed specific retailer and bottle-image references from index.html for Phase 1 neutrality.

Key implementation notes:

  • Current mobile build script is TypeScript compile validation (tsc --noEmit) due local Watchman export issues during expo export in this environment.
  • Legacy web assets/data remain in the repository but are no longer represented as the Phase 1 target architecture.

Failed to implement

Resolution status update (2026-02-18): Resolved in v0.2 by upgrading mobile from Expo SDK 52 to SDK 54 and re-validating lint/build/audit.

  • Fully remediating all mobile dependency vulnerabilities without a breaking Expo SDK upgrade.
    • What was attempted:
      • Ran npm audit and npm audit fix in /mobile.
    • What was achieved:
      • Applied non-breaking dependency updates where available.
    • What went wrong:
      • Remaining vulnerabilities are in Expo CLI dependency chain (tar via @expo/cli/cacache) and require npm audit fix --force, which upgrades Expo from SDK 52 to SDK 54 (breaking change).
    • Where preserved/disabled work is located:
      • Updated lockfile and dependency state in mobile/package-lock.json.
    • What is needed to complete it:
      • Planned Expo SDK major upgrade and compatibility pass for all mobile dependencies.

Verification

  • Lint: pass
    • cd backend && npm run lint
    • cd mobile && npm run lint
  • Tests: not configured in this repository
  • Build: pass
    • cd backend && npm run build
    • cd mobile && npm run build

Security review & vulnerability scan

  • Tools/commands used:
    • cd backend && npm audit --audit-level=high
    • cd mobile && npm audit --audit-level=high
    • cd mobile && npm audit fix
  • Findings:
    • Backend: no vulnerabilities.
    • Mobile: 4 high-severity vulnerabilities remain in transitive dependencies (tar in Expo CLI chain).
  • Fixes applied:
    • Non-breaking npm audit fix in /mobile.
  • Remaining risks:
    • Mobile transitive dependency exposure remains until Expo major SDK upgrade is completed.

Files changed (high-level)

  • New backend application and API:
    • backend/*
  • New mobile application:
    • mobile/*
  • Versioning and environment config:
    • VERSION
    • .env.example
  • Documentation/reporting:
    • README.md
    • myra-v0.1-updates.md
  • Neutrality cleanup in existing web entry:
    • index.html

Notes / follow-ups

  • Next security-focused increment should be dedicated to Expo SDK major upgrade and re-validation on iOS/Android emulators.