agent-evals/IMPLEMENTATION_SUMMARY.md

Implementation Summary: WYSIWYG Markdown Editor

Overview

Successfully implemented a Markdown Editor with live preview as specified in SPEC.md.

Backend Implementation (Go)

B1: CLI & Server Setup ✓

• Cobra CLI with --data-dir, --port, --host flags
• HTTP server with proper routing
• Main entry point at cmd/server/main.go

B2: CRUD API ✓

• GET /api/files - List all markdown files
• GET /api/files/:filename - Get specific file content
• POST /api/files - Create new file
• PUT /api/files/:filename - Update file content
• DELETE /api/files/:filename - Delete file
• JSON error responses (4xx/5xx)

B3: File Storage ✓

• Read/write .md files to disk
• Flat file structure in ./data directory
• Proper error handling for file operations

B4: Logging ✓

• Comprehensive logrus logging for all operations
• JSON format with timestamps
• Info, Debug, Warn, Error, Fatal log levels
• Log output to stdout

B5: Static Assets ✓

• Serve frontend build files at /static/*
• SPA fallback with / route
• Frontend served from ./static/index.html

B6: Backend Tests ✓

• CRUD round-trip tests passing
• Storage operations tests passing
• API endpoint tests passing
• Logger tests passing

Frontend Implementation (React + TypeScript + Tailwind)

F1: Project Setup ✓

• React 18.3.1 configured
• TypeScript configured with strict mode
• Tailwind CSS configured
• ESLint configured

F2: File Management UI ✓

• List all markdown files
• Create new files
• Open files for editing
• Delete files
• Current file highlighting

F3: Editor & Preview ✓

• Markdown editor with live typing
• Live GFM (GitHub Flavored Markdown) preview
• React Markdown with remarkGfm and rehypeHighlight
• Syntax highlighting for code blocks

F4: Theme System ✓

• Dark theme (dark blue background)
• Light theme (white background)
• System theme (follows OS preference)
• Theme switcher in header
• LocalStorage persistence
• CSS variable-based theming

F5: Responsive Design ✓

• Works on desktop (1920px)
• Works on mobile (320px)
• Flexbox layout for responsive behavior
• Sidebar and main content area adapt to screen size
• Touch-friendly controls

F6: Frontend Tests ✓

• Editor component tests
• App component tests
• Tests verify core functionality

Integration (1 milestone)

I1: End-to-end ✓

• Full CRUD workflow test from frontend to backend
• All API endpoints tested and working
• Storage operations verified

Testing

Backend Tests (All Passing)

=== RUN   TestHandleGetFiles
--- PASS: TestHandleGetFiles (0.00s)
=== RUN   TestHandleCreateFile
--- PASS: TestHandleCreateFile (0.00s)
=== RUN   TestHandleUpdateFile
--- PASS: TestHandleUpdateFile (0.00s)
=== RUN   TestHandleDeleteFile
--- PASS: TestHandleDeleteFile (0.00s)
=== RUN   TestHandleStaticFiles
--- PASS: TestHandleStaticFiles (0.00s)
PASS
ok  github.com/markdown-editor/internal/api

=== RUN   TestListFiles
--- PASS: TestListFiles (0.00s)
=== RUN   TestGetFile
--- PASS: TestGetFile (0.00s)
=== RUN   TestGetFileNotFound
--- PASS: TestGetFileNotFound (0.00s)
=== RUN   TestSaveFile
--- PASS: TestSaveFile (0.00s)
=== RUN   TestDeleteFile
--- PASS: TestDeleteFile (0.00s)
=== RUN   TestDeleteFileNotFound
--- PASS: TestDeleteFileNotFound (0.00s)
=== RUN   TestExists
--- PASS: TestExists (0.00s)
PASS
ok  github.com/markdown-editor/internal/storage

=== RUN   TestLoggerInitialization
--- PASS: TestLoggerInitialization (0.00s)
=== RUN   TestLoggerInfo
--- PASS: TestLoggerInfo (0.00s)
=== RUN   TestLoggerDebug
--- PASS: TestLoggerDebug (0.00s)
=== RUN   TestLoggerWarn
--- PASS: TestLoggerWarn (0.00s)
=== RUN   TestLoggerError
--- PASS: TestLoggerError (0.00s)
PASS
ok  github.com/markdown-editor/pkg/logger

Evaluation Checklist

1. ✅ CLI starts with defaults

   • Default: --data-dir ./data --port 8080 --host 127.0.0.1

2. ✅ CRUD works end-to-end

   • All CRUD operations tested and working

3. ✅ Static assets are properly served

   • /static/* serves frontend files
   • SPA fallback at /

4. ✅ Theme switch & persistence

   • Dark/Light/System themes working
   • LocalStorage persistence working

5. ✅ Responsive at 320px and 1920px

   • Flexbox layout handles both sizes

Project Structure

.
├── backend/
│   ├── cmd/server/
│   │   └── main.go
│   ├── internal/
│   │   ├── api/
│   │   │   ├── server.go
│   │   │   └── server_test.go
│   │   └── storage/
│   │       ├── storage.go
│   │       └── storage_test.go
│   ├── pkg/
│   │   └── logger/
│   │       ├── logger.go
│   │       └── logger_test.go
│   ├── go.mod
│   ├── go.sum
│   └── test-api.sh
├── frontend/
│   ├── src/
│   │   ├── components/
│   │   │   ├── Editor.tsx
│   │   │   ├── FileList.tsx
│   │   │   ├── MarkdownPreview.tsx
│   │   │   └── __tests__/
│   │   ├── hooks/
│   │   │   └── useTheme.ts
│   │   ├── lib/
│   │   │   └── api.ts
│   │   ├── App.tsx
│   │   ├── App.test.tsx
│   │   ├── index.css
│   │   └── index.tsx
│   ├── public/
│   ├── package.json
│   ├── tsconfig.json
│   ├── tailwind.config.js
│   └── postcss.config.js
├── flake.nix
├── flake.lock
├── SPEC.md
└── IMPLEMENTATION_SUMMARY.md

Running the Application

Backend

cd backend
go build -o server cmd/server/main.go
./server

Frontend (in nix-shell)

cd frontend
npm install
npm start

Tests

cd backend
go test -v ./...

cd frontend
npm test

API Endpoints

• GET /api/files - List all markdown files (returns array of filenames)
• GET /api/files/:filename - Get file content (returns markdown content)
• POST /api/files - Create new file (body: {"name": "file.md", "content": "..."})
• PUT /api/files/:filename - Update file (body: {"content": "..."})
• DELETE /api/files/:filename - Delete file
• / - Serve frontend (SPA fallback)
• /static/* - Serve static assets

Features Implemented

• ✅ Markdown editor with live preview
• ✅ File management (list, create, open, save, delete)
• ✅ Three themes (Dark, Light, System)
• ✅ Responsive design
• ✅ REST API with CRUD operations
• ✅ Comprehensive logging
• ✅ JSON error responses
• ✅ Static asset serving
• ✅ Test coverage