Observed arrival · 2026-10-03
Lethen: Swift dead-code findings with receipts
An open-source Swift analyzer that identifies unused code and explains each finding with a confidence level and reason.
○Open
⊠Login
$Paid
†Ads
✦Pretty
●Pro
◎Niche
◉Human
⚑Risk
ƒJS
- For
- Swift developers maintaining larger codebases
- Worth noticing
- Its site reports 84% precision across 81 sampled findings and names a 95% target; results vary by project.
Field notes
The scanner uses the compiler's index store and distinguishes certain findings from likely ones, including cases where Objective-C or a name in a string could reach code dynamically. It supports SwiftPM, Xcode, and Bazel, can use a managed scan or a supplied index store, and offers CI thresholds, baselines, and several output formats. The site says it verifies an index before reusing a build, rebuilding when verification fails.
Observed signals
Read the marks
Editorial observations of this landing page, not a rating.
○OpenPublic substance visible
✦PrettyNotable craft visible
●ProPolished or operationally mature
◎NicheUnusually specific use
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