JustPrep

AI mock-interview practice that actually changes how you perform. Create an interview for a specific role, level, stack, and company; take it in text or voice; get per-question feedback with evidence from your own transcript, model answers, and a concrete next drill. Every attempt is kept, so progress is visible.

Built to a world-class standard on a free-only infrastructure budget.

Status

Rebuild in progress. The engineering handbook is complete; implementation follows docs/IMPLEMENTATION_PLAN.md phase by phase. The legacy prototype (v0.1) still lives in app/, components/, and lib/ until each phase replaces it.

Read first

AGENTS.md	Operating manual for engineers and AI agents — start here
docs/IMPLEMENTATION_PLAN.md · docs/MILESTONES.md	What to build, in order — phases, then PR-level breakdown with file migration map
docs/GUARDRAILS.md	Hard rules (cost, security, architecture, design, process)
docs/RISKS.md	Risk register and per-phase watch-list
docs/ARCHITECTURE.md	Layers, folder layout, SOLID mapping, data model v2
docs/TECH_STACK.md	Approved free services and libraries; voice and LLM routing
docs/SECURITY.md	Threat model and mandatory controls
docs/DESIGN_SYSTEM.md	Tokens, components, motion, anti-AI-look checklist
docs/COMPONENT_LIBRARY.md	shadcn + 21st.dev + motion sourcing and adaptation
docs/RESPONSIVE.md	Device matrix and responsive rules
docs/CODING_STANDARDS.md · docs/QUALITY.md	Code style, tests, budgets
docs/decisions/	ADRs
docs/ANALYSIS_AND_ROADMAP.md	The audit of the legacy codebase

Stack (target)

Next.js (App Router) · React · TypeScript strict · Tailwind v4 · shadcn/ui + 21st.dev · motion · Firebase Auth + Firestore (free) · Vercel AI SDK with Gemini (primary) and Groq (fallback) · Gemini Live + Web Speech API + on-device TTS for voice · Cloudflare R2 · Upstash · Sentry · PostHog · Resend · Vitest · Playwright · pnpm · lefthook · GitHub Actions.

Local development (after Phase 0)

pnpm install
cp .env.example .env.local
pnpm dlx firebase-tools emulators:start --only auth,firestore
pnpm dev

See CONTRIBUTING.md for branching, commits, and the PR checklist. Security reports: SECURITY.md.

Licence

Private. All rights reserved.