# Activity Overview

## What We Built

### 1. Basic Posting (01a-hello-world.js)
- Connects to Bluesky using app password
- Posts a simple message with #ATProtoChicago
- Shows the basics of authentication and posting

### 2. Creative Posts (01b-emoji-art.js) 
- Generates random emoji art grids
- Demonstrates creative uses of the posting API
- Fun visual output that's shareable

### 3. Rich Text Features (02-rich-text.js)
- Auto-detects links and converts them to clickable links
- Auto-detects hashtags for discoverability
- Shows how Bluesky enhances plain text

### 4. Real-time Firehose (03-feed-generator.js)
- Connects to Bluesky's Jetstream service
- Filters the entire network for #ATProtoChicago posts
- Shows posts in real-time with clean JSON format
- Demonstrates how feed generators work

### 5. Timeline Filtering (05-post-filter.js)
- Fetches your home timeline
- Filters for Chicago/ATProto mentions
- Shows engagement metrics
- Local processing example

### 6. Profile Updates (04-profile-updater.js)
- Programmatically updates your profile
- Adds timestamp to description
- Shows how to modify account data

## Key Concepts Demonstrated

- **Authentication**: Using app passwords safely
- **CRUD Operations**: Create posts, read timeline, update profile
- **Real-time Data**: Consuming the firehose
- **Data Processing**: Filtering and analyzing posts
- **Rich Content**: Links, mentions, hashtags
- **API Patterns**: Consistent error handling and async/await

## Architecture Notes

- All examples use the official `@atproto/api` SDK
- Jetstream provides JSON instead of binary CAR/CBOR
- Credentials stored in `.env` for security
- Bun runtime for fast execution and built-in TypeScript support