Time Block

A single-user web app for time-blocking a work week. You define projects and the percentage of each work day they should get, add meetings and personal blocks that don’t count toward project hours, and the app fills in the rest.

The allocation engine

The piece I care most about. For each work day it starts from your configured hours, subtracts meetings and personal time, then water-fills the remainder with project blocks proportional to each project’s target percentage — spread across the week so the weekly totals converge on target rather than forcing every day to match.

It’s a pure function with no knowledge of the UI, which means it’s unit-tested directly instead of through the interface. Dragging a block adjusts it and locks it, and re-allocation then routes around the locked block instead of overwriting it.

Other pieces worth noting

• Recurring templates that split cleanly. Editing a single occurrence leaves the template alone; a “this and all future” edit splits the template at a week boundary rather than rewriting history.
• Per-week target overrides, so one unusual week doesn’t require changing a project’s standing target.
• Read-only past weeks, a configurable work week, and per-day available hours.

Built with the App Router on a local SQLite file via Prisma’s better-sqlite3 driver adapter — no auth, no server, no account. It runs on my machine and nowhere else. Later work migrated the whole interface onto shadcn/ui, and the visual language that came out of it is the same one this site is built on.