Write PR Description

Prepare a title and body from the current changes, using the repository's PR template or the default template. Show the text before publishing.

Draft-only is the default and needs neither gh nor network access. Create mode applies when the user asks to open, create or raise a PR; it includes any necessary push after text approval.

Step 1 — Check for uncommitted task files

Read git status --short, including untracked files. Identify files that belong to the task; leave unrelated changes untouched and name them briefly. Ask if their scope is unclear.

In create mode, if task files are uncommitted, show their paths and ask: "There are uncommitted task files. Commit them before preparing the PR?" Stop and wait. Approval to create a PR alone does not approve this commit.