describe-prlisted

# Generate PR Description You are tasked with generating a comprehensive pull request description following the repository's standard template. ## Steps to follow: 1. **Read the PR description template:** - First, check if `thoughts/shared/pr_description.md` exists - If it doesn't exist, inform the user they need to create a PR description template at `thoughts/shared/pr_description.md` - Read the template carefully to understand all sections and requirements 2. **Identify the PR to describe:** - Check if the current branch has an associated PR: `gh pr view --json url,number,title,state 2>/dev/null` - If no PR exists for the current branch, or if on main/master, list open PRs: `gh pr list --limit 10 --json number,title,headRefName,author` - Ask the user which PR they want to describe 3. **Check for existing description:** - Check if `thoughts/shared/prs/{number}_description.md` already exists - If it exists, read it and inform the user you'll be updating it - Consider what has changed since the last description was written 4. **Gather comprehensive PR information:** - Get the full PR diff: `gh pr diff {number}` - If you get an error about no default remote repository, instruct the user to run `gh repo set-default` and select the appropriate repository - Get commit history: `gh pr view {number} --json commits` - Review the base branch: `gh pr view {number} --json baseRefName` - Get PR metadata: `gh pr view {number} --json url,ti