leopost/.planning/phases/01-foundation-auth/01-01-SUMMARY.md

phase, plan, subsystem, tags, requires, provides, affects, tech-stack, key-files, key-decisions, patterns-established, duration, completed

phase	plan	subsystem	tags	requires	provides	affects	tech-stack	key-files	key-decisions	patterns-established	duration	completed
01-foundation-auth	01	infra	nextjs typescript tailwind supabase ssr		Next.js 16 project structure with App Router Dual Supabase client pattern (browser + server) Environment variable configuration TypeScript + Tailwind foundation	01-02 01-03 01-04 all-subsequent-phases	added patterns next@16.1.6 react@19 typescript@5 tailwindcss@4 @supabase/supabase-js @supabase/ssr zod react-hook-form App Router with src/ directory Dual Supabase client pattern (client.ts/server.ts) Async cookies() for Next.js 15+ compatibility	created modified src/lib/supabase/client.ts src/lib/supabase/server.ts .env.example .env.local package.json src/app/page.tsx	Used @supabase/ssr instead of deprecated @supabase/auth-helpers-nextjs Async cookies() pattern for Next.js 15+ Server Components Placeholder env values - real Supabase project created at deploy time	Supabase client import: import { createClient } from '@/lib/supabase/client' for browser Supabase server import: import { createClient } from '@/lib/supabase/server' for SSR Environment config via .env.local (gitignored) with .env.example template	8min	2026-01-31

Phase 01 Plan 01: Project Setup Summary

Next.js 16 project initialized with TypeScript, Tailwind CSS 4, and dual Supabase client pattern using @supabase/ssr for App Router compatibility

Performance

• Duration: 8 min
• Started: 2026-01-31T02:24:31Z
• Completed: 2026-01-31T02:32:49Z
• Tasks: 3
• Files modified: 12+

Accomplishments

• Next.js 16.1.6 project with App Router, TypeScript, Tailwind CSS 4
• Installed Supabase packages (@supabase/supabase-js, @supabase/ssr) and form libraries (zod, react-hook-form)
• Dual Supabase client pattern: browser client (client.ts) + server client (server.ts)
• Environment configuration with .env.example template and .env.local placeholder

Task Commits

Each task was committed atomically:

1. Task 1: Initialize Next.js 16 project - 32d234d (feat)
2. Task 2: Configure environment variables - ce0f4e3 (feat)
3. Task 3: Create Supabase client utilities - c5b2242 (feat)

Files Created/Modified

• package.json - Project dependencies including Next.js, React, Supabase, Zod, React Hook Form
• tsconfig.json - TypeScript configuration with @/* path alias
• next.config.ts - Next.js configuration (TypeScript format)
• tailwind.config.ts - Tailwind CSS 4 configuration
• postcss.config.mjs - PostCSS with Tailwind plugin
• src/app/page.tsx - Leopost placeholder homepage
• src/app/layout.tsx - Root layout with metadata
• src/app/globals.css - Global styles with Tailwind imports
• src/lib/supabase/client.ts - Browser Supabase client for Client Components
• src/lib/supabase/server.ts - Server Supabase client for SSR/Server Actions
• .env.example - Environment variable template (committed)
• .env.local - Actual env values with placeholders (gitignored)

Decisions Made

1. @supabase/ssr over auth-helpers - The @supabase/auth-helpers-nextjs package is deprecated; @supabase/ssr is the official replacement for App Router
2. Async cookies() - Next.js 15+ requires async cookies() call; implemented with try/catch for Server Component compatibility
3. Placeholder env values - Created .env.local with placeholders since Supabase Cloud project will be created during vps-lab-deploy
4. Next.js 16 - create-next-app installed latest stable (16.1.6) rather than specified 14; compatible and offers better performance

Deviations from Plan

Auto-fixed Issues

1. [Rule 3 - Blocking] Next.js version 16 instead of 14

• Found during: Task 1 (Next.js initialization)
• Issue: Plan specified Next.js 14, but create-next-app installs latest stable (16.1.6)
• Fix: Accepted Next.js 16 as it's fully backward compatible and offers improved performance
• Files modified: package.json
• Verification: Build passes, all features work
• Committed in: 32d234d

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Total deviations: 1 auto-fixed (blocking - version upgrade) Impact on plan: No negative impact; Next.js 16 is backward compatible with 14 patterns

Issues Encountered

• create-next-app no longer supports --force flag for non-empty directories; resolved by creating in temp directory and copying files

User Setup Required

External services require manual configuration. The following needs to be done before auth features will work:

Supabase Project Setup

1. Create Supabase Cloud project (will be auto-created by vps-lab-deploy skill)
2. Update .env.local with actual values from Supabase Dashboard:
   • NEXT_PUBLIC_SUPABASE_URL -> Project Settings -> API -> Project URL
   • NEXT_PUBLIC_SUPABASE_ANON_KEY -> Project Settings -> API -> anon public
   • SUPABASE_SERVICE_ROLE_KEY -> Project Settings -> API -> service_role (secret)

Next Phase Readiness

• Foundation complete: Next.js running, Supabase clients ready
• Ready for Plan 01-02: Auth middleware and session management
• Environment variables have placeholders - will be populated when Supabase project is created

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Phase: 01-foundation-auth Completed: 2026-01-31