• There are 70 files with units, with 6,792 lines of code.
• 0 very complex files (McCabe index sum 251+; 0 lines of code)
• 0 complex files (McCabe index sum 126-250; 0 lines of code)
• 4 medium complex files (McCabe index sum 51-125; 1,160 lines of code)
• 8 slightly complex files (McCabe index sum 26-50; 1,333 lines of code)
• 58 simple files (McCabe index sum 1-25; 4,299 lines of code)
• 46 main files have no units (e.g. languages without unit analysis, or files without functions) and are not classified.

The McCabe index of a file grows with its size: per 100 lines tells a large but plain file from a dense one, and most complex unit whether the complexity sits in one unit or is spread over many.

File	# lines	# units	McCabe index (sum)	per 100 lines	most complex unit
NotificationHandlerHelper.scala in lambda/src/main/scala/pricemigrationengine/model	300	16	111	37	17
AmendmentEffectiveDateCalculator.scala in lambda/src/main/scala/pricemigrationengine/model	174	7	88	51	49
AmendmentHandlerHelper.scala in lambda/src/main/scala/pricemigrationengine/model	387	10	88	23	18
Newspaper2026MigrationX.scala in lambda/src/main/scala/pricemigrationengine/migrations	299	13	70	23	17
SupporterPlus2026Migration.scala in lambda/src/main/scala/pricemigrationengine/migrations	278	16	43	15	7
AmendmentHandler.scala in lambda/src/main/scala/pricemigrationengine/handlers	348	8	39	11	17
EstimationHandlerHelper.scala in lambda/src/main/scala/pricemigrationengine/model	52	3	35	67	17
SubscriptionNotificationAnalyseResult.scala in lambda/src/main/scala/pricemigrationengine/model	83	4	32	39	19
SubscriptionEstimationAnalysisResult.scala in lambda/src/main/scala/pricemigrationengine/model	76	5	28	37	17
AmendmentData.scala in lambda/src/main/scala/pricemigrationengine/model	102	3	27	26	17
NewspaperHelper.scala in lambda/src/main/scala/pricemigrationengine/model	75	7	26	35	11
ZuoraLive.scala in lambda/src/main/scala/pricemigrationengine/services	319	12	26	8	6
NotificationHandler.scala in lambda/src/main/scala/pricemigrationengine/handlers	286	10	25	9	5
EstimationHandler.scala in lambda/src/main/scala/pricemigrationengine/handlers	167	6	23	14	10
Membership2025Migration.scala in lambda/src/main/scala/pricemigrationengine/migrations	131	6	21	16	6
SubscriptionIntrospection2025.scala in lambda/src/main/scala/pricemigrationengine/model	122	12	18	15	4
MigrationType.scala in lambda/src/main/scala/pricemigrationengine/model	38	1	17	45	17
Conversions.scala in lambda/src/main/scala/pricemigrationengine/model/dynamodb	125	10	17	14	2
SalesforceLive.scala in lambda/src/main/scala/pricemigrationengine/services	217	9	17	8	3
GuardianWeekly2026MigrationX.scala in lambda/src/main/scala/pricemigrationengine/migrations	248	6	16	6	5
NewspaperFinanceAllocations.scala in lambda/src/main/scala/pricemigrationengine/model	296	2	16	5	11
DigiSubs2025Migration.scala in lambda/src/main/scala/pricemigrationengine/migrations	123	4	14	11	7
ZuoraRatePlan.scala in lambda/src/main/scala/pricemigrationengine/model	44	6	13	30	4
ZuoraOrdersApiPrimitives.scala in lambda/src/main/scala/pricemigrationengine/model	153	12	13	8	2
DynamoDBZIOLive.scala in lambda/src/main/scala/pricemigrationengine/services	108	5	13	12	4
BillingPeriod.scala in lambda/src/main/scala/pricemigrationengine/model	36	2	11	31	6
Currency.scala in lambda/src/main/scala/pricemigrationengine/model	207	5	9	4	2
SalesforcePriceRiseCreationHandler.scala in lambda/src/main/scala/pricemigrationengine/handlers	99	5	9	9	2
SalesforceNotificationDateUpdateHandler.scala in lambda/src/main/scala/pricemigrationengine/handlers	83	5	9	11	2
GuardianWeeklyHelper.scala in lambda/src/main/scala/pricemigrationengine/model	28	2	8	29	6
SubscriptionIdUploadHandler.scala in lambda/src/main/scala/pricemigrationengine/handlers	83	6	8	10	2
DynamoDBZIO.scala in lambda/src/main/scala/pricemigrationengine/services	42	8	8	19	1
TemplateMigration.scala in lambda/src/main/scala/pricemigrationengine/migrations	119	3	7	6	4
check-fixtures-anonymization.rb in tools	49	1	6	12	6
GuardianWeeklyFinanceAllocations.scala in lambda/src/main/scala/pricemigrationengine/model	74	1	6	8	6
RatePlanProbe.scala in lambda/src/main/scala/pricemigrationengine/model	30	4	6	20	3
T6xLegChargeOverride.scala in lambda/src/main/scala/pricemigrationengine/model	57	3	6	11	3
CurrencyAndLocalisation.scala in lambda/src/main/scala/pricemigrationengine/model	29	1	6	21	6
migration1.ts in android-price-rise/src	137	3	5	4	3
SubscriptionAmendmentAnalyseResult.scala in lambda/src/main/scala/pricemigrationengine/model	17	1	5	29	5
CohortSpec.scala in lambda/src/main/scala/pricemigrationengine/model	30	3	5	17	3
SalesforceAmendmentUpdateHandler.scala in lambda/src/main/scala/pricemigrationengine/handlers	69	3	5	7	2
CohortHandler.scala in lambda/src/main/scala/pricemigrationengine/handlers	60	4	5	8	2
CohortTableDdlLive.scala in lambda/src/main/scala/pricemigrationengine/services	79	3	5	6	2
EnvConfig.scala in lambda/src/main/scala/pricemigrationengine/services	66	2	4	6	2
CohortTableLive.scala in lambda/src/main/scala/pricemigrationengine/services	175	1	4	2	4
Date.scala in lambda/src/main/scala/pricemigrationengine/model	8	1	3	38	3
PriceCap.scala in lambda/src/main/scala/pricemigrationengine/model	17	1	3	18	3
CohortTableCreationHandler.scala in lambda/src/main/scala/pricemigrationengine/handlers	23	1	3	13	3
S3Live.scala in lambda/src/main/scala/pricemigrationengine/services	56	3	3	5	1

• File complexity is the sum of the McCabe indexes (conditional complexity) of the units (methods, functions...) in a file.
• Files are classified in five categories based on that sum: 1-25 (simple files), 26-50 (slightly complex files), 51-125 (medium complex files), 126-250 (complex files), 251+ (very complex files). The default bands are five times the unit complexity bands, as a file is a group of units.
• Only main code files with units are classified. Files without units (languages without unit analysis, or files without functions) have no complexity to measure and are left out rather than counted as simple.
• A very complex file holds many decisions, which often means it has too many responsibilities: a candidate to split, and a place where changes need more testing.