Performs a guided fixup of a given GitHub PR. Checks out the PR branch, retrieves CI status and review comments, reruns flaky CI checks, resolves code/compilation/test/lint failures locally, addresses review comments, verifies locally using gradlew check, and presents changes to the user for approval before pushing or responding.
Helps increment code coverage in this Kotlin Multiplatform project. Guides the agent to ask the user for the number of areas to improve, establish a baseline report, plan the improvements, write Kotlin unit tests following all Detekt/formatting style rules, and commit them (including using git fixup).