implement-task

Implements a project task from docs/IMPLEMENTATION.md when the user says "implement task X.XX" (e.g. "implement task 1.11", "implement task 2.02"). Reads the task spec, sets up a git worktree on the correct branch, then implements the task end-to-end following project conventions. Use this skill whenever the user says "implement task", "do task", "work on task", or references a task ID like "1.07", "2.03", etc. in…