diff --git a/checker/generator/messages.yaml b/checker/generator/messages.yaml
deleted file mode 100644
index 79612083..00000000
--- a/checker/generator/messages.yaml
+++ /dev/null
@@ -1,225 +0,0 @@
-stability-decreased: stability was decreased from %s to %s
-api-path-removed: api path was removed without deprecation
-api-path-removed: api path was removed before sunset
-api-removed: api was removed without deprecation
-api-removed: api was removed before sunset
-endpoint-added: added endpoint
-endpoint-removed: removed endpoint
-endpoint-deprecated: deprecated endpoint
-endpoint-reactivated: reactivated endpoint
-success-response-status-added: added success response status %s
-success-response-status-removed: removed success response status %s
-non-success-response-status-added: added non-success response status %s
-non-success-response-status-removed: removed non-success response status %s
-operation-id-changed: operation id was changed from %s to %s
-operation-id-added: added operation id %s
-operation-id-removed: removed operation id %s
-tag-added: added tag %s
-tag-removed: removed tag %s
-endpoint-security-scheme-security-scope-added: added security scope %s to endpoint security scheme %s
-endpoint-security-scheme-security-scope-removed: removed security scope %s from endpoint security scheme %s
-request-body-media-type-max-set: max value of media-type %s of request body was set to %s
-request-body-media-type-max-increased: max value of media-type %s of request body was increased from %s to %s
-request-body-media-type-max-decreased: max value of media-type %s of request body was decreased from %s to %s
-request-body-media-type-max-length-set: maxLength value of media-type %s of request body was set to %s
-request-body-media-type-max-length-increased: maxLength value of media-type %s of request body was increased from %s to %s
-request-body-media-type-max-length-decreased: maxLength value of media-type %s of request body was decreased from %s to %s
-request-body-media-type-min-set: min value of media-type %s of request body was set to %s
-request-body-media-type-min-increased: min value of media-type %s of request body was increased from %s to %s
-request-body-media-type-min-decreased: min value of media-type %s of request body was decreased from %s to %s
-request-body-media-type-min-length-set: minLength value of media-type %s of request body was set to %s
-request-body-media-type-min-length-increased: minLength value of media-type %s of request body was increased from %s to %s
-request-body-media-type-min-length-decreased: minLength value of media-type %s of request body was decreased from %s to %s
-request-body-media-type-min-items-set: minItems value of media-type %s of request body was set to %s
-request-body-media-type-min-items-increased: minItems value of media-type %s of request body was increased from %s to %s
-request-body-media-type-min-items-decreased: minItems value of media-type %s of request body was decreased from %s to %s
-request-body-media-type-max-items-set: maxItems value of media-type %s of request body was set to %s
-request-body-media-type-max-items-increased: maxItems value of media-type %s of request body was increased from %s to %s
-request-body-media-type-max-items-decreased: maxItems value of media-type %s of request body was decreased from %s to %s
-request-body-media-type-type-changed: type/format of media-type %s of request body was changed from %s to %s
-request-body-media-type-type-generalized: type/format of media-type %s of request body was generalized from %s to %s
-request-body-media-type-discriminator-property-name-changed: discriminator property name of media-type %s of request body was changed from %s to %s
-request-body-media-type-pattern-changed: pattern of media-type %s of request body was changed from %s to %s
-request-body-media-type-pattern-generalized: pattern of media-type %s of request body was generalized from %s to %s
-request-body-media-type-required-property-changed: required property of media-type %s of request body was changed from %s to %s
-request-body-media-type-optional-property-changed: optional property of media-type %s of request body was changed from %s to %s
-request-body-media-type-pattern-added: added pattern %s to media-type %s of request body
-request-body-media-type-pattern-removed: removed pattern %s from media-type %s of request body
-request-body-media-type-default-value-added: added default value to media-type %s of request body
-request-body-media-type-default-value-removed: removed default value from media-type %s of request body
-request-body-media-type-any-of-list-schema-added: added schema %s to anyOf list %s of media-type %s of request body
-request-body-media-type-any-of-list-schema-removed: removed schema %s from anyOf list %s of media-type %s of request body
-request-body-media-type-any-of-list-schema-added: added schema %s to anyOf list %s of media-type %s of request body
-request-body-media-type-any-of-list-schema-removed: removed schema %s from anyOf list %s of media-type %s of request body
-request-body-media-type-any-of-list-schema-added: added schema %s to anyOf list %s of media-type %s of request body
-request-body-media-type-any-of-list-schema-removed: removed schema %s from anyOf list %s of media-type %s of request body
-request-body-media-type-discriminator-added: added discriminator %s to media-type %s of request body
-request-body-media-type-discriminator-removed: removed discriminator %s from media-type %s of request body
-request-body-media-type-mapping-keys-added: added mapping keys %s to media-type %s of request body
-request-body-media-type-mapping-keys-removed: removed mapping keys %s from media-type %s of request body
-request-body-media-type-property-max-set: max value of property %s of media-type %s of request body was set to %s
-request-body-media-type-property-max-increased: max value of property %s of media-type %s of request body was increased from %s to %s
-request-body-media-type-property-max-decreased: max value of property %s of media-type %s of request body was decreased from %s to %s
-request-body-media-type-property-max-length-set: maxLength value of property %s of media-type %s of request body was set to %s
-request-body-media-type-property-max-length-increased: maxLength value of property %s of media-type %s of request body was increased from %s to %s
-request-body-media-type-property-max-length-decreased: maxLength value of property %s of media-type %s of request body was decreased from %s to %s
-request-body-media-type-property-min-set: min value of property %s of media-type %s of request body was set to %s
-request-body-media-type-property-min-increased: min value of property %s of media-type %s of request body was increased from %s to %s
-request-body-media-type-property-min-decreased: min value of property %s of media-type %s of request body was decreased from %s to %s
-request-body-media-type-property-min-length-set: minLength value of property %s of media-type %s of request body was set to %s
-request-body-media-type-property-min-length-increased: minLength value of property %s of media-type %s of request body was increased from %s to %s
-request-body-media-type-property-min-length-decreased: minLength value of property %s of media-type %s of request body was decreased from %s to %s
-request-body-media-type-property-min-items-set: minItems value of property %s of media-type %s of request body was set to %s
-request-body-media-type-property-min-items-increased: minItems value of property %s of media-type %s of request body was increased from %s to %s
-request-body-media-type-property-min-items-decreased: minItems value of property %s of media-type %s of request body was decreased from %s to %s
-request-body-media-type-property-max-items-set: maxItems value of property %s of media-type %s of request body was set to %s
-request-body-media-type-property-max-items-increased: maxItems value of property %s of media-type %s of request body was increased from %s to %s
-request-body-media-type-property-max-items-decreased: maxItems value of property %s of media-type %s of request body was decreased from %s to %s
-request-body-media-type-property-type-changed: type/format of property %s of media-type %s of request body was changed from %s to %s
-request-body-media-type-property-type-generalized: type/format of property %s of media-type %s of request body was generalized from %s to %s
-request-body-media-type-property-discriminator-property-name-changed: discriminator property name of property %s of media-type %s of request body was changed from %s to %s
-request-body-media-type-property-pattern-changed: pattern of property %s of media-type %s of request body was changed from %s to %s
-request-body-media-type-property-pattern-generalized: pattern of property %s of media-type %s of request body was generalized from %s to %s
-request-body-media-type-property-required-property-changed: required property of property %s of media-type %s of request body was changed from %s to %s
-request-body-media-type-property-optional-property-changed: optional property of property %s of media-type %s of request body was changed from %s to %s
-request-body-media-type-property-pattern-added: added pattern %s to property %s of media-type %s of request body
-request-body-media-type-property-pattern-removed: removed pattern %s from property %s of media-type %s of request body
-request-body-media-type-property-default-value-added: added default value to property %s of media-type %s of request body
-request-body-media-type-property-default-value-removed: removed default value from property %s of media-type %s of request body
-request-body-media-type-property-any-of-list-schema-added: added schema %s to anyOf list %s of property %s of media-type %s of request body
-request-body-media-type-property-any-of-list-schema-removed: removed schema %s from anyOf list %s of property %s of media-type %s of request body
-request-body-media-type-property-any-of-list-schema-added: added schema %s to anyOf list %s of property %s of media-type %s of request body
-request-body-media-type-property-any-of-list-schema-removed: removed schema %s from anyOf list %s of property %s of media-type %s of request body
-request-body-media-type-property-any-of-list-schema-added: added schema %s to anyOf list %s of property %s of media-type %s of request body
-request-body-media-type-property-any-of-list-schema-removed: removed schema %s from anyOf list %s of property %s of media-type %s of request body
-request-body-media-type-property-discriminator-added: added discriminator %s to property %s of media-type %s of request body
-request-body-media-type-property-discriminator-removed: removed discriminator %s from property %s of media-type %s of request body
-request-body-media-type-property-mapping-keys-added: added mapping keys %s to property %s of media-type %s of request body
-request-body-media-type-property-mapping-keys-removed: removed mapping keys %s from property %s of media-type %s of request body
-request-parameter-max-set: max value of %s request parameter %s was set to %s
-request-parameter-max-increased: max value of %s request parameter %s was increased from %s to %s
-request-parameter-max-decreased: max value of %s request parameter %s was decreased from %s to %s
-request-parameter-max-length-set: maxLength value of %s request parameter %s was set to %s
-request-parameter-max-length-increased: maxLength value of %s request parameter %s was increased from %s to %s
-request-parameter-max-length-decreased: maxLength value of %s request parameter %s was decreased from %s to %s
-request-parameter-min-set: min value of %s request parameter %s was set to %s
-request-parameter-min-increased: min value of %s request parameter %s was increased from %s to %s
-request-parameter-min-decreased: min value of %s request parameter %s was decreased from %s to %s
-request-parameter-min-length-set: minLength value of %s request parameter %s was set to %s
-request-parameter-min-length-increased: minLength value of %s request parameter %s was increased from %s to %s
-request-parameter-min-length-decreased: minLength value of %s request parameter %s was decreased from %s to %s
-request-parameter-min-items-set: minItems value of %s request parameter %s was set to %s
-request-parameter-min-items-increased: minItems value of %s request parameter %s was increased from %s to %s
-request-parameter-min-items-decreased: minItems value of %s request parameter %s was decreased from %s to %s
-request-parameter-max-items-set: maxItems value of %s request parameter %s was set to %s
-request-parameter-max-items-increased: maxItems value of %s request parameter %s was increased from %s to %s
-request-parameter-max-items-decreased: maxItems value of %s request parameter %s was decreased from %s to %s
-request-parameter-type-changed: type/format of %s request parameter %s was changed from %s to %s
-request-parameter-type-generalized: type/format of %s request parameter %s was generalized from %s to %s
-request-parameter-discriminator-property-name-changed: discriminator property name of %s request parameter %s was changed from %s to %s
-request-parameter-pattern-changed: pattern of %s request parameter %s was changed from %s to %s
-request-parameter-pattern-generalized: pattern of %s request parameter %s was generalized from %s to %s
-request-parameter-required-property-changed: required property of %s request parameter %s was changed from %s to %s
-request-parameter-optional-property-changed: optional property of %s request parameter %s was changed from %s to %s
-request-parameter-pattern-added: added pattern %s to %s request parameter %s
-request-parameter-pattern-removed: removed pattern %s from %s request parameter %s
-request-parameter-default-value-added: added default value to %s request parameter %s
-request-parameter-default-value-removed: removed default value from %s request parameter %s
-request-parameter-any-of-list-schema-added: added schema %s to anyOf list %s of %s request parameter %s
-request-parameter-any-of-list-schema-removed: removed schema %s from anyOf list %s of %s request parameter %s
-request-parameter-any-of-list-schema-added: added schema %s to anyOf list %s of %s request parameter %s
-request-parameter-any-of-list-schema-removed: removed schema %s from anyOf list %s of %s request parameter %s
-request-parameter-any-of-list-schema-added: added schema %s to anyOf list %s of %s request parameter %s
-request-parameter-any-of-list-schema-removed: removed schema %s from anyOf list %s of %s request parameter %s
-request-parameter-discriminator-added: added discriminator %s to %s request parameter %s
-request-parameter-discriminator-removed: removed discriminator %s from %s request parameter %s
-request-parameter-mapping-keys-added: added mapping keys %s to %s request parameter %s
-request-parameter-mapping-keys-removed: removed mapping keys %s from %s request parameter %s
-required-request-body-added: added required request body
-required-request-body-removed: removed required request body
-optional-request-body-added: added optional request body
-optional-request-body-removed: removed optional request body
-request-parameter-added: added %s request parameter %s
-request-parameter-removed: removed %s request parameter %s
-response-media-type-max-set: max value of media-type %s of response %s was set to %s
-response-media-type-max-increased: max value of media-type %s of response %s was increased from %s to %s
-response-media-type-max-decreased: max value of media-type %s of response %s was decreased from %s to %s
-response-media-type-max-length-set: maxLength value of media-type %s of response %s was set to %s
-response-media-type-max-length-increased: maxLength value of media-type %s of response %s was increased from %s to %s
-response-media-type-max-length-decreased: maxLength value of media-type %s of response %s was decreased from %s to %s
-response-media-type-min-set: min value of media-type %s of response %s was set to %s
-response-media-type-min-increased: min value of media-type %s of response %s was increased from %s to %s
-response-media-type-min-decreased: min value of media-type %s of response %s was decreased from %s to %s
-response-media-type-min-length-set: minLength value of media-type %s of response %s was set to %s
-response-media-type-min-length-increased: minLength value of media-type %s of response %s was increased from %s to %s
-response-media-type-min-length-decreased: minLength value of media-type %s of response %s was decreased from %s to %s
-response-media-type-min-items-set: minItems value of media-type %s of response %s was set to %s
-response-media-type-min-items-increased: minItems value of media-type %s of response %s was increased from %s to %s
-response-media-type-min-items-decreased: minItems value of media-type %s of response %s was decreased from %s to %s
-response-media-type-max-items-set: maxItems value of media-type %s of response %s was set to %s
-response-media-type-max-items-increased: maxItems value of media-type %s of response %s was increased from %s to %s
-response-media-type-max-items-decreased: maxItems value of media-type %s of response %s was decreased from %s to %s
-response-media-type-type-changed: type/format of media-type %s of response %s was changed from %s to %s
-response-media-type-type-generalized: type/format of media-type %s of response %s was generalized from %s to %s
-response-media-type-discriminator-property-name-changed: discriminator property name of media-type %s of response %s was changed from %s to %s
-response-media-type-pattern-changed: pattern of media-type %s of response %s was changed from %s to %s
-response-media-type-pattern-generalized: pattern of media-type %s of response %s was generalized from %s to %s
-response-media-type-required-property-changed: required property of media-type %s of response %s was changed from %s to %s
-response-media-type-optional-property-changed: optional property of media-type %s of response %s was changed from %s to %s
-response-media-type-pattern-added: added pattern %s to media-type %s of response %s
-response-media-type-pattern-removed: removed pattern %s from media-type %s of response %s
-response-media-type-default-value-added: added default value to media-type %s of response %s
-response-media-type-default-value-removed: removed default value from media-type %s of response %s
-response-media-type-any-of-list-schema-added: added schema %s to anyOf list %s of media-type %s of response %s
-response-media-type-any-of-list-schema-removed: removed schema %s from anyOf list %s of media-type %s of response %s
-response-media-type-any-of-list-schema-added: added schema %s to anyOf list %s of media-type %s of response %s
-response-media-type-any-of-list-schema-removed: removed schema %s from anyOf list %s of media-type %s of response %s
-response-media-type-any-of-list-schema-added: added schema %s to anyOf list %s of media-type %s of response %s
-response-media-type-any-of-list-schema-removed: removed schema %s from anyOf list %s of media-type %s of response %s
-response-media-type-discriminator-added: added discriminator %s to media-type %s of response %s
-response-media-type-discriminator-removed: removed discriminator %s from media-type %s of response %s
-response-media-type-mapping-keys-added: added mapping keys %s to media-type %s of response %s
-response-media-type-mapping-keys-removed: removed mapping keys %s from media-type %s of response %s
-response-media-type-property-max-set: max value of property %s of media-type %s of response %s was set to %s
-response-media-type-property-max-increased: max value of property %s of media-type %s of response %s was increased from %s to %s
-response-media-type-property-max-decreased: max value of property %s of media-type %s of response %s was decreased from %s to %s
-response-media-type-property-max-length-set: maxLength value of property %s of media-type %s of response %s was set to %s
-response-media-type-property-max-length-increased: maxLength value of property %s of media-type %s of response %s was increased from %s to %s
-response-media-type-property-max-length-decreased: maxLength value of property %s of media-type %s of response %s was decreased from %s to %s
-response-media-type-property-min-set: min value of property %s of media-type %s of response %s was set to %s
-response-media-type-property-min-increased: min value of property %s of media-type %s of response %s was increased from %s to %s
-response-media-type-property-min-decreased: min value of property %s of media-type %s of response %s was decreased from %s to %s
-response-media-type-property-min-length-set: minLength value of property %s of media-type %s of response %s was set to %s
-response-media-type-property-min-length-increased: minLength value of property %s of media-type %s of response %s was increased from %s to %s
-response-media-type-property-min-length-decreased: minLength value of property %s of media-type %s of response %s was decreased from %s to %s
-response-media-type-property-min-items-set: minItems value of property %s of media-type %s of response %s was set to %s
-response-media-type-property-min-items-increased: minItems value of property %s of media-type %s of response %s was increased from %s to %s
-response-media-type-property-min-items-decreased: minItems value of property %s of media-type %s of response %s was decreased from %s to %s
-response-media-type-property-max-items-set: maxItems value of property %s of media-type %s of response %s was set to %s
-response-media-type-property-max-items-increased: maxItems value of property %s of media-type %s of response %s was increased from %s to %s
-response-media-type-property-max-items-decreased: maxItems value of property %s of media-type %s of response %s was decreased from %s to %s
-response-media-type-property-type-changed: type/format of property %s of media-type %s of response %s was changed from %s to %s
-response-media-type-property-type-generalized: type/format of property %s of media-type %s of response %s was generalized from %s to %s
-response-media-type-property-discriminator-property-name-changed: discriminator property name of property %s of media-type %s of response %s was changed from %s to %s
-response-media-type-property-pattern-changed: pattern of property %s of media-type %s of response %s was changed from %s to %s
-response-media-type-property-pattern-generalized: pattern of property %s of media-type %s of response %s was generalized from %s to %s
-response-media-type-property-required-property-changed: required property of property %s of media-type %s of response %s was changed from %s to %s
-response-media-type-property-optional-property-changed: optional property of property %s of media-type %s of response %s was changed from %s to %s
-response-media-type-property-pattern-added: added pattern %s to property %s of media-type %s of response %s
-response-media-type-property-pattern-removed: removed pattern %s from property %s of media-type %s of response %s
-response-media-type-property-default-value-added: added default value to property %s of media-type %s of response %s
-response-media-type-property-default-value-removed: removed default value from property %s of media-type %s of response %s
-response-media-type-property-any-of-list-schema-added: added schema %s to anyOf list %s of property %s of media-type %s of response %s
-response-media-type-property-any-of-list-schema-removed: removed schema %s from anyOf list %s of property %s of media-type %s of response %s
-response-media-type-property-any-of-list-schema-added: added schema %s to anyOf list %s of property %s of media-type %s of response %s
-response-media-type-property-any-of-list-schema-removed: removed schema %s from anyOf list %s of property %s of media-type %s of response %s
-response-media-type-property-any-of-list-schema-added: added schema %s to anyOf list %s of property %s of media-type %s of response %s
-response-media-type-property-any-of-list-schema-removed: removed schema %s from anyOf list %s of property %s of media-type %s of response %s
-response-media-type-property-discriminator-added: added discriminator %s to property %s of media-type %s of response %s
-response-media-type-property-discriminator-removed: removed discriminator %s from property %s of media-type %s of response %s
-response-media-type-property-mapping-keys-added: added mapping keys %s to property %s of media-type %s of response %s
-response-media-type-property-mapping-keys-removed: removed mapping keys %s from property %s of media-type %s of response %s
-endpoint-scheme-security-added: added endpoint scheme security %s
-endpoint-scheme-security-removed: removed endpoint scheme security %s
-global-security-scheme-security-scope-added: added security scope %s to global security scheme %s
-global-security-scheme-security-scope-removed: removed security scope %s from global security scheme %s