What problem does it solve? After upgrading a skills collection, the artifacts a previous skill run installed into your repository — tracker descriptors at .ai/trackers/<tracker>.md and browser-provider descriptors at .ai/browsers/<provider>.md — become stale, which can degrade or skip operations they do not define. This Skill reads the collection's UPGRADE_NOTES.md, diffs installed descriptors against the shipped versions, and brings them up to date without discarding local customizations. ## Core Features & Use Cases - Descriptor diffing and sync: Compares installed tracker and browser descriptors operation-by-operation against shipped versions, classifying each difference as missing, changed, locally edited, or local-only, and applies additive updates safely. - Local customization protection: Never silently overwrites sections a team has edited; shows both versions side by side and asks the operator to keep, replace, or merge, while always preserving local-only operations. - Config and upgrade-notes verification: Walks UPGRADE_NOTES.md entries, adds missing config keys to .ai/agentic.config.json with documented defaults, checks expected artifacts, and reports custom-provider gaps instead of inventing implementations. - Use Case: After running npx skills add to upgrade your agent pipeline skills, invoke this Skill to re-sync the installed GitHub tracker descriptor with newly shipped operations like attach-image-evidence, then review the uncommitted diff and a structured report of exactly what changed. ## Quick Start Apply the skills collection's upgrade notes to this repository and re-sync my installed tracker and browser descriptors, showing me a dry-run report first.