killbill / killbill
Open-Source Subscription Billing & Payments Platform
github.com/killbill/killbillIndexed at 0a46fd0Up to date with upstream
About this codebase
`repo` is a Java-based billing platform codebase that ingests domain inputs (API calls, events, and call context), routes them through service and JAX-RS layers, publishes/consumes internal bus events, and produces billing artifacts such as invoices and related dispatchable outputs.
Written by gpt-5.4-nano from the index
2,762 files and 16,517 symbols in 16 modules, led by Java (1,694 files) and JavaScript (12).
Code health
This codebase scores 7.6 out of 10 for code health, which we rate good. It also scores maintainability 7.5 and static performance 9.9 out of 10. The three are scored separately and never blended into one number. Risk is concentrated, as it usually is: 27 of 2,762 files are git hotspots, and they average 3.9 — which is where the fixes pay off most.
On the leaderboards:#4 of 11 Java repos
Do next
4 things worth doing this quarter.
Worth planning
Flatten the nesting in validateExistingPlan
catalog/src/main/java/org/killbill/billing/catalog/CatalogUpdater.java:229
validateExistingPlan nests its control flow deeply; changed 1 time in 90 days.
- gain
- up to +1.0 health on this file(inferred)
- finding
- Nested complexity
- size
- CCN 25, 40 lines, nests 5 deep
- severity
- high
Medium effort, worth a checkBreak up getRolledUpUsage (CCN 28, 89 lines)
invoice/src/main/java/org/killbill/billing/invoice/usage/ContiguousIntervalUsageInArrear.java:493
getRolledUpUsage nests its control flow deeply.
- gain
- up to +1.0 health on this file(inferred)
- finding
- Nested complexity
- size
- CCN 28, 89 lines, nests 8 deep
- severity
- critical
Medium effort, worth a checkDelete 46 unused symbols and files (1,814 lines)
Nothing in the graph reaches them, across 32 files; every reader and agent pays to skip them.
- symbols
- 46
- lines
- 1,814
- safe to delete
- Yes(inferred)
Medium effort
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Go deeper
- OverviewEverything the index found, what changed this week, commits and decisions.
- DocumentationModule-by-module documentation, 1,804 pages, 362 written by a model.
- ArchitectureDependency graph, layers and third-party dependencies.
- Code healthEvery file's score, the findings behind it, tests and refactoring plans.
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[](https://repowise.dev/repo/killbill/killbill?src=badge_card)How killbill/killbill works
Open-Source Subscription Billing & Payments Platform This page is a map of the killbill/killbill repository, written primarily in Java, rebuilt from the source each time it is indexed. Repowise parses every symbol, computes a dependency graph, scores per-file code health from complexity, duplication, test coverage and churn, mines git history for hotspots and ownership, and lifts the architectural decisions into documentation you can read here or query through MCP.
The codebase has 2,762 files and 16,517 symbols in 16 modules, led by Java and JavaScript. Code health is 7.6 out of 10, rated good.
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