Browse Skills

Behavior Preservation Checker compares runtime behavior between original and migrated repositories to find regressions, semantic changes, and contract violations. Use it when validating migrations, refactors, language ports, or framework upgrades that should preserve behavior.

Behavioral Mutation Analyzer reviews surviving mutants from mutation testing to find why tests missed them. It identifies coverage gaps, weak assertions, edge cases, and equivalent mutants, then suggests test improvements and new cases.

Bisect-Aware Instrumentation creates deterministic pass/fail test scripts for git bisect runs. Use it to handle flaky tests, build failures, logging, and commit-by-commit regression checks.

Bug History Summarizer traces a bug across commits to show when it was introduced, detected, fixed, and whether it regressed. Use it for bug lifecycle reports, post-mortems, and analyzing repeated fix attempts.

Bug Localization identifies the most likely source of a bug from stack traces, failing tests, logs, and code patterns. Use it when debugging crashes, test failures, or runtime issues and you need ranked suspect locations with evidence.

Bug Reproduction Test Generator creates executable tests from issue reports and repository code to reproduce reported bugs. Use it to turn stack traces, error messages, or bug descriptions into regression tests.

Bug To Patch Generator analyzes bug reports, failing tests, stack traces, and error messages to identify root causes. It generates targeted code patches and suggests validation steps when fixing defects or security issues.

Code Completion With Constraints completes partial code while meeting type, behavior, invariant, and interface requirements. Use it when a snippet must be finished and verified against explicit constraints.

Cross-Validate Artifacts checks documentation and codebase artifacts for consistency, conflicts, and contradictions. Use it to audit docs or run a validate-and-fix pass across related files and paths.

Hexagonal Architecture helps you structure Spring Boot code with domain, application, and infrastructure layers. Use it to keep domain code free of Spring or JPA and to check ports, adapters, and package layout.

Layered Architecture enforces controller, service, repository, DTO, and configuration boundaries in Spring Boot code. Use it when creating or modifying classes so business logic, mapping, and HTTP concerns stay in the right layer.

Null Safety guides nullability annotations in Spring Boot 3 and Spring Framework 6 code. Use it for Java/Kotlin modules, repository contracts, and mixed annotation strategies without assuming Framework 7 JSpecify defaults.