RescueTime

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Build me an automatic time tracker for my own machine, storing everything locally.

STACK
- A small agent per platform: on macOS use the Accessibility API, on Linux use the X11 or Wayland active-window interface
- SQLite on disk, and a local web page for reports — no server, no account

WHAT IS RECORDED
- Every five seconds: active application name, window title and idle state
- Idle after two minutes of no input; idle time is recorded as idle, never as work
- Sessions built by collapsing consecutive samples of the same application

PRIVACY, DECIDED FIRST
- Everything stays on the machine; there is no upload path in the code at all
- A deny-list of applications and title patterns that are never recorded, with password managers and banking on it by default
- A visible indicator that recording is on, and a one-key pause

CATEGORIES
- A rules file mapping application and title patterns to a category and a productivity score
- Unmatched applications collected on an "uncategorised" screen, which is the weekly review

REPORTS
- A day timeline, a week summary by category, and the longest uninterrupted focus block per day
- Compare this week against the four-week median, not against a target

DATA
- Append-only samples; categories can be re-derived without losing the raw record

Include a README on the platform permissions required and how to export or delete everything.