rtk-ai/rtk
View on GitHubFeature: support for `jar tf`, `jar xf`, and `javap` commands
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#2,158 opened on May 29, 2026
area:clienhancementhelp wantedpriority:medium
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Description
Summary
jar tf, jar xf, and javap are not intercepted by RTK. These commands produce large, verbose output when inspecting JVM class files and JAR archives — common during Android/JVM dependency debugging.
Usage data
From rtk discover on an Android monorepo project (last 30 days):
- 27 invocations of
jar xf - 13 invocations of
jar tf - 11 invocations of
javap
Example commands seen:
jar tf /tmp/classes.jar
jar xf /Users/sinan.kozak/.gradle/caches/modules-2/files-2.1/com.bumptech.glide/...
javap -p com/bumptech/glide/integration/compose/ExperimentalGlideComposeApi.class
Why it matters
jar tflists every class file in a JAR — large libraries (e.g. Glide, OkHttp) can have thousands of entriesjar xfextracts files and is often followed by inspecting extracted contentjavap -pdumps full decompiled bytecode including all method signatures
All three produce output that is largely noise for the model — it typically only needs a few specific class names or method signatures, not the full listing.
Expected behavior
rtk jar tf <jar>— truncate output, show first N entries + summary count ("showing 50 of 3,241 classes")rtk javap <args>— truncate to relevant sections, similar to how RTK handles large grep outputrtk jar xf— passthrough (extraction itself produces no stdout, follow-up reads are handled byrtk read)
Current workaround
Pipe through grep manually: jar tf foo.jar | grep SomeClass — but this requires knowing what to grep for upfront.