Add problem/solution recap after task completion

Problem

After completing a task, Claude Code provides a summary of the changes made (files modified, etc.), but it lacks a textual recap of the problem that was solved. The problem definition is clearly stated at the beginning of a plan, but by the time implementation is done, that context is gone from view.

Suggestion

After completing a task, include a structured recap similar to:

Problem: [restate the original problem/goal]
Solution: [summary of what was done to solve it]
Changes: [list of files/areas modified]

This mirrors the problem definition given at the start of a plan and gives the user a clear, self-contained summary of what was accomplished and why.