New command to spawn parallel agents that address PR review feedback: - /spawn-pr-fixes 12 15 18 - fix specific PRs - /spawn-pr-fixes - auto-find PRs with requested changes pr-fixer agent workflow: - Creates worktree from PR branch - Reads review comments - Addresses each piece of feedback - Commits and pushes fixes - Runs code-reviewer synchronously - Loops until approved (max 3 iterations) - Cleans up worktree - Outputs concise summary Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>