Install and connect
Install Kast, connect your agent, and check the connection with a real query.
Find and trace code
Find a declaration, then follow its callers or implementations.
From search to source changes
Find a declaration. Start with a name or a word you remember from the source, and narrow the search to a module or directory. Check the returned signature and location, then reuse its exact reference in your next query. See Find and trace code. Trace relationships. Find callers, implementations, or references, and follow them to a chosen depth. Kast reports any work left unfinished. You can also combine retained results to compare declarations found by separate queries. Make a targeted change. Add a declaration to an existing Kotlin file or replace a supported function body. Kast uses an exact reference to identify the target and returns a receipt with the verification outcome. See the change guide for supported targets and recovery.Why the evidence matters
Finding one confirmed caller does not mean every caller was found. An empty, incomplete result does not prove that a declaration is absent. Kast reports these limits so your agent can distinguish a useful finding from a finished search. References also depend on the workspace and source state that produced them. Kast checks whether they can still be used. Read What an answer proves for coverage and reuse, or How Kast works for the request flow.Supported environment
Kast supports Kotlin Gradle projects on Apple silicon macOS with IntelliJ IDEA262.*. Connect Codex, Copilot, or Pi. Kast prepares the selected IDEA project when a query needs it and reports any setup blocker.
Check compatibility before installing. After a source change, run the build and tests your project requires; Kast’s edit verification and IDEA diagnostics cover their reported scope.