ykpythemind

                "rules": [
                    {
                        "description": "Ctrl+p/Ctrl+n to arrow up/down (slack)",
                        "manipulators": [
                            {
                                "conditions": [
                                    {
                                        "bundle_identifiers": ["com.tinyspeck.slackmacgap"],
                                        "type": "frontmost_application_if"
                                    }