June 2026 monthly summary for facebook/sapling: Implemented automerge workflow for the toolsim manifest to auto-resolve CLI-name entries, reducing merge conflicts during concurrent tool additions. This included adding a new automerge filetype 'pytoolsim', updating the automerge mapping path, and ensuring generated dict/tuple entries are sorted and merged correctly. Repointed the automerge mapping after the toolsim manifest move to preserve auto-merge behavior across repository changes. Later in the month, removed the pytoolsim automerge filetype when the host-based discovery approach eliminated the need for generated tool mappings, and cleaned up the associated dynamic_system.rs mappings and tests. Overall, these changes decreased manual merge effort, improved consistency of the toolsim CLI-name mappings, and kept the tooling pipeline resilient to manifest structure changes.