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,title,number,state

4b. Gather reasoning history (if available):

• Check if reasoning files exist: ls .git/claude/commits/*/reasoning.md 2>/dev/null
• If they exist, aggregate them: bash "$CLAUDE_PROJECT_DIR/.claude/scripts/aggregate-reasoning.sh" main
• This shows what approaches were tried before the final solution
• Save the output for inclusion in the PR description