XMate

About

XMate is a memo and scheduling helper extension for X (formerly Twitter).

Key features
- Korean IME input safeguard to reduce last-syllable truncation while composing posts
- Create, edit, and delete per-user notes on profile pages
- Show saved notes inline next to user names in timeline
- userId-based storage so notes survive handle changes
- Multi-device sync with chrome.storage.sync
- View/search/delete saved notes and check storage usage in Options
- Quick schedule-time shortcuts in the scheduling modal
  - In 5m, 10m, 30m, 1h
  - +1h, -1h, +1d, -1d

Data handling
- Only user-entered notes are stored.
- Data is kept in browser sync storage and is not sent to a separate custom backend server.


v0.3.0
- Resolved the Chrome Sync Storage limitation (8KB per item quota limit) caused by storing all user records in a single aggregate key
- Compressed internal JSON payload keys to a single character during storage I/O to significantly reduce overhead.
- Result: The storage footprint per user has been slashed by over 70% allowing synchronize about 1,400 users simultaneously.