Start working on a Marshroom cart issue in the current repository. Critical Requirements - state.json update is MANDATORY . After creating the branch, you MUST update the issue status to in . If this fails, stop and report the error — do NOT silently continue. - Use if available; otherwise fall back to direct atomic write (see step 10). Steps 1. Read and parse the JSON 2. Extract the array. If the cart is empty, tell the user to add issues in the Marshroom app 3. Run to get the current repo's remote URL 4. Extract from the remote URL (handle both HTTPS and SSH formats) 5. Filter cart entries…