What problem does it solve? Upgrading a permanent downstream fork to a new upstream release is risky: custom hooks can be silently lost, mirrored code can drift, and fairness guarantees can break. This Skill executes the documented upgrade procedure with mandatory checkpoints so every merge is verified and reproducible. ## Core Features & Use Cases - Human-approved tag selection: Fetches upstream tags, filters out beta/rc releases, shows the commit delta, and stops for explicit human approval before merging. - Hook and mirror re-verification: Re-applies every documented hook after conflict resolution, re-verifies mirrored upstream method bodies against digests, and records the verified tag. - Full validation pipeline: Runs the Gradle build, harness fairness and determinism tests, regenerates the Codex, runs the rig baseline, and updates all affected docs in the same PR. - Use Case: When Shattered Pixel Dungeon publishes a new stable release, invoke this Skill to produce a reviewed upgrade PR with green CI, published rig numbers, and updated documentation. ## Quick Start Ask the assistant to upgrade upstream to the latest stable Shattered Pixel Dungeon tag and follow the documented sync procedure.
