# Project and Session Organization Design

**Date:** 2025-01-19
**Status:** Approved
**Author:** Claude (with user collaboration)

## Overview

Introduce persistent projects as first-class entities that contain multiple sessions, with intelligent assignment, reorganization, and soft-delete capabilities.

## Architecture

### Data Model

**Projects Collection**
```javascript
{
  _id: ObjectId,
  name: "My API Project",
  description: "REST API development",
  icon: "🚀",
  color: "#4a9eff",
  path: "/home/uroma/api",
  sessionIds: [ObjectId, ...],
  createdAt: Date,
  lastActivity: Date,
  deletedAt: Date | null  // null = active, Date = in recycle bin
}
```

**Sessions Collection (Updated)**
```javascript
{
  ...
  projectId: ObjectId | null,  // null = unassigned
  deletedAt: Date | null
}
```

### API Endpoints

| Method | Endpoint | Description |
|--------|----------|-------------|
| GET | `/api/projects` | List active projects |
| POST | `/api/projects` | Create project |
| PUT | `/api/projects/:id` | Update project |
| DELETE | `/api/projects/:id` | Soft delete (move to recycle bin) |
| POST | `/api/projects/:id/restore` | Restore from bin |
| DELETE | `/api/projects/:id/permanent` | Permanent delete |
| GET | `/api/recycle-bin` | List deleted items |
| POST | `/api/sessions/:id/move` | Move session to different project |

## UI Components

### Projects Page (`/projects`)

- **Header**: Title, "+ New Project" button, search bar
- **Project Grid**: Cards with icon, name, description, path, session count, last activity
- **Context Menu**: Edit, move to recycle bin
- **Empty State**: "No projects yet" with CTA

### Enhanced Landing Page (`/claude/`)

Projects as top-level, sessions nested inside:
- Collapsible project sections
- "Unassigned Sessions" section at bottom
- Session cards show project badge
- Right-click for context menu

### Session Context Menu

```
┌─────────────────────────┐
│ Open in IDE             │
│ ─────────────────────── │
│ Move to Project  ▶      │
│   ├── 🚀 My API (🎯 95%)│
│   ├── 📱 Mobile App     │
│   ├── ──────────────────│
│   └── Show All Projects │
│ ─────────────────────── │
│ Duplicate               │
│ Delete                  │
└─────────────────────────┘
```

### Recycle Bin

- Accessible from projects page header
- Shows deleted projects with faded sessions
- "Restore" and "Delete Permanently" buttons per item

## Smart Assignment Algorithm

### Auto-Assignment

When creating a session from the IDE project selector:
1. User selects project → `projectId` stored
2. Session added to project's `sessionIds` array
3. Project `lastActivity` updated

### Smart Suggestions

Calculated when moving sessions:

```javascript
function getSuggestions(session, allProjects) {
  const suggestions = [];

  for (const project of allProjects) {
    let score = 0;
    let reasons = [];

    // Directory matching (high weight)
    if (session.workingDir === project.path) {
      score += 90;
      reasons.push('Same directory');
    } else if (session.workingDir?.startsWith(project.path)) {
      score += 50;
      reasons.push('Subdirectory');
    }

    // Recency (medium weight)
    const daysSinceActivity = (Date.now() - project.lastActivity) / (1000 * 60 * 60 * 24);
    if (daysSinceActivity < 1) {
      score += 20;
      reasons.push('Used today');
    } else if (daysSinceActivity < 7) {
      score += 10;
      reasons.push(`Used ${Math.floor(daysSinceActivity)} days ago`);
    }

    // Name similarity (low weight)
    if (session.name?.includes(project.name) || project.name.includes(session.name)) {
      score += 15;
      reasons.push('Similar name');
    }

    if (score > 0) {
      suggestions.push({ project, score, reasons });
    }
  }

  return suggestions.sort((a, b) => b.score - a.score).slice(0, 3);
}
```

**Visual Indicators:**
- 🎯 90%+ match → Same directory
- 📂 50-89% match → Subdirectory or recent use
- 💡 10-49% match → Similar name or recently used

## Recycle Bin System

### Soft Delete Flow

**Delete:**
```javascript
// Mark project as deleted
await db.projects.updateOne(
  { _id: projectId },
  { $set: { deletedAt: new Date() } }
);

// Soft delete all sessions in project
await db.sessions.updateMany(
  { projectId },
  { $set: { deletedAt: new Date() } }
);
```

**Restore:**
```javascript
await db.projects.updateOne({ _id }, { $set: { deletedAt: null } });
await db.sessions.updateMany({ projectId }, { $set: { deletedAt: null } });
```

**Permanent Delete:**
```javascript
await db.projects.deleteOne({ _id });
await db.sessions.deleteMany({ projectId });
```

## Edge Cases

| Scenario | Behavior |
|----------|----------|
| Reassigning from deleted project | Session becomes unassigned (projectId = null) |
| Deleting last session in project | Project persists with 0 sessions |
| Two projects with same path | Both shown as suggestions with equal score |
| Local CLI sessions | Can be assigned, path read from info.json |
| Moving to deleted project | Blocked - deleted projects excluded from menu |
| Concurrent edits | Last write wins (MongoDB atomic updates) |

## Implementation

### File Structure

```
server.js (add endpoints)
public/claude-ide/
├── projects.html (new)
├── projects.js (new)
├── projects.css (new)
└── sessions-landing.js (modify)
context-menu.js (new shared component)
```

### Migration Script

```javascript
// 1. Create projects collection
db.createCollection('projects');

// 2. Find unique project names from existing sessions
const uniqueProjects = await db.sessions.distinct('metadata.project');

// 3. Create project for each unique name
for (const name of uniqueProjects) {
  const projectSessions = await db.sessions.find({ 'metadata.project': name }).toArray();
  const paths = [...new Set(projectSessions.map(s => s.workingDir).filter(Boolean))];

  await db.projects.insertOne({
    name,
    description: '',
    icon: getRandomIcon(),
    color: getRandomColor(),
    path: paths[0] || '',
    sessionIds: projectSessions.map(s => s._id),
    createdAt: projectSessions[0].createdAt,
    lastActivity: Math.max(...projectSessions.map(s => s.lastActivity)),
    deletedAt: null
  });
}

// 4. Update sessions with projectId
for (const project of await db.projects.find().toArray()) {
  await db.sessions.updateMany(
    { 'metadata.project': project.name },
    { $set: { projectId: project._id } }
  );
}
```

## Testing Checklist

- [ ] Create project via inline form
- [ ] Auto-assign session on creation
- [ ] Smart suggestions calculate correctly
- [ ] Move session via context menu
- [ ] Delete project → goes to recycle bin
- [ ] Restore project from bin
- [ ] Permanent delete works
- [ ] Unassigned sessions display correctly
- [ ] Migration backfills existing data
- [ ] Icon/color randomization works
- [ ] Path validation on project creation