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25678bddedBumps [org.jetbrains.kotlin.jvm](https://github.com/JetBrains/kotlin) from 2.3.21 to 2.4.0. <details> <summary>Release notes</summary> <p><em>Sourced from <a href="https://github.com/JetBrains/kotlin/releases">org.jetbrains.kotlin.jvm's releases</a>.</em></p> <blockquote> <h2>Kotlin 2.4.0</h2> <h2>Changelog</h2> <h3>Analysis API</h3> <ul> <li><a href="https://youtrack.jetbrains.com/issue/KT-83867"><code>KT-83867</code></a> OVERLOAD_RESOLUTION_AMBIGUITY false positive with assertEquals in IJ repo</li> <li><a href="https://youtrack.jetbrains.com/issue/KT-83723"><code>KT-83723</code></a> [Analysis API] Enable experimental KDoc resolver by default</li> <li><a href="https://youtrack.jetbrains.com/issue/KT-83388"><code>KT-83388</code></a> Analysis API: properly support KMP in KotlinPackageProvider</li> <li><a href="https://youtrack.jetbrains.com/issue/KT-65683"><code>KT-65683</code></a> Analysis API: Dangling file session creation causes a <code>computeIfAbsent</code> contract violation</li> </ul> <h3>Analysis API. Code Compilation</h3> <ul> <li><a href="https://youtrack.jetbrains.com/issue/KT-78946"><code>KT-78946</code></a> Evaluation of variable with local class in type parameter leads to InventNamesForLocalClasses exception</li> </ul> <h3>Analysis API. FIR</h3> <ul> <li><a href="https://youtrack.jetbrains.com/issue/KT-68260"><code>KT-68260</code></a> K2 AA: InvalidFirElementTypeException “For CALLABLE_REFERENCE_EXPRESSION with text <code>::lam1</code>, unexpected element of type: no element found” with illegal callable reference call</li> <li><a href="https://youtrack.jetbrains.com/issue/KT-70896"><code>KT-70896</code></a> AA: False positive deprecation warning with override of built-in method in JDK mapped class</li> <li><a href="https://youtrack.jetbrains.com/issue/KT-84711"><code>KT-84711</code></a> K2 IDE sometimes loses FIR plugin-generated declarations after file changes</li> <li><a href="https://youtrack.jetbrains.com/issue/KT-84625"><code>KT-84625</code></a> Analysis API: collectDesignationPath fails for nested classes inside plugin-generated top-level classes</li> <li><a href="https://youtrack.jetbrains.com/issue/KT-84596"><code>KT-84596</code></a> Improve K2 Jooq completion performance</li> <li><a href="https://youtrack.jetbrains.com/issue/KT-84525"><code>KT-84525</code></a> KaValueParameterSymbol#getHasSynthesizedName returns false for FirDeclarationOrigin.SubstitutionOverride.DeclarationSite</li> <li><a href="https://youtrack.jetbrains.com/issue/KT-83546"><code>KT-83546</code></a> Kotlin analysis reach ClsCustomNavigationPolicy</li> <li><a href="https://youtrack.jetbrains.com/issue/KT-84259"><code>KT-84259</code></a> Move CommonDefaultImportsProvider to the frontend independent module</li> <li><a href="https://youtrack.jetbrains.com/issue/KT-82945"><code>KT-82945</code></a> Analysis API: KotlinIllegalArgumentExceptionWithAttachments: Expected FirResolvedTypeRef with ConeKotlinType but was FirUserTypeRefImpl</li> <li><a href="https://youtrack.jetbrains.com/issue/KT-71135"><code>KT-71135</code></a> AA: exception from sealed inheritors checker when <code>analyzeCopy</code></li> </ul> <h3>Analysis API. Infrastructure</h3> <h4>Fixes</h4> <ul> <li><a href="https://youtrack.jetbrains.com/issue/KT-83905"><code>KT-83905</code></a> Analysis API: Improve UX with test data</li> <li><a href="https://youtrack.jetbrains.com/issue/KT-84913"><code>KT-84913</code></a> Extract compiler classes used by the PSI & Analysis API to a separate module</li> <li><a href="https://youtrack.jetbrains.com/issue/KT-64986"><code>KT-64986</code></a> Analysis API: Implement Analysis API tests for different KMP Platforms</li> <li><a href="https://youtrack.jetbrains.com/issue/KT-84776"><code>KT-84776</code></a> The test data manager misses the redundancy check in the update mode</li> <li><a href="https://youtrack.jetbrains.com/issue/KT-84962"><code>KT-84962</code></a> The test data manager misses -ea flag</li> <li><a href="https://youtrack.jetbrains.com/issue/KT-84388"><code>KT-84388</code></a> Preserve the EOF status in the test data manager to avoid extra changes</li> <li><a href="https://youtrack.jetbrains.com/issue/KT-84362"><code>KT-84362</code></a> Analysis API tests produce many warnings due to "not yet loaded registry"</li> <li><a href="https://youtrack.jetbrains.com/issue/KT-84279"><code>KT-84279</code></a> Test Data Manager fails on a clean build</li> <li><a href="https://youtrack.jetbrains.com/issue/KT-83913"><code>KT-83913</code></a> Exclude compiler-based Analysis API tests from Git tracking</li> <li><a href="https://youtrack.jetbrains.com/issue/KT-80379"><code>KT-80379</code></a> Extract per-module test generators for AA tests</li> <li><a href="https://youtrack.jetbrains.com/issue/KT-84120"><code>KT-84120</code></a> Move CLI modules out of kotlin-compiler-fe10-for-ide</li> <li><a href="https://youtrack.jetbrains.com/issue/KT-83200"><code>KT-83200</code></a> Track external dependencies of the Analysis API modules</li> </ul> <h3>Analysis API. Light Classes</h3> <ul> <li><a href="https://youtrack.jetbrains.com/issue/KT-82434"><code>KT-82434</code></a> Light classes should prefer enum entries to properties</li> <li><a href="https://youtrack.jetbrains.com/issue/KT-84200"><code>KT-84200</code></a> SLC: return type is not boxed for delegated methods with generic original method</li> <li><a href="https://youtrack.jetbrains.com/issue/KT-72451"><code>KT-72451</code></a> "CCE: class PsiPrimitiveType cannot be cast to class PsiClassType" with same-named enum class and typealias</li> </ul> <!-- raw HTML omitted --> </blockquote> <p>... (truncated)</p> </details> <details> <summary>Changelog</summary> <p><em>Sourced from <a href="https://github.com/JetBrains/kotlin/blob/master/ChangeLog.md">org.jetbrains.kotlin.jvm's changelog</a>.</em></p> <blockquote> <h2>2.4.0</h2> <h3>Analysis API</h3> <ul> <li><a href="https://youtrack.jetbrains.com/issue/KT-83867"><code>KT-83867</code></a> OVERLOAD_RESOLUTION_AMBIGUITY false positive with assertEquals in IJ repo</li> <li><a href="https://youtrack.jetbrains.com/issue/KT-83723"><code>KT-83723</code></a> [Analysis API] Enable experimental KDoc resolver by default</li> <li><a href="https://youtrack.jetbrains.com/issue/KT-83388"><code>KT-83388</code></a> Analysis API: properly support KMP in KotlinPackageProvider</li> <li><a href="https://youtrack.jetbrains.com/issue/KT-65683"><code>KT-65683</code></a> Analysis API: Dangling file session creation causes a <code>computeIfAbsent</code> contract violation</li> </ul> <h3>Analysis API. Code Compilation</h3> <ul> <li><a href="https://youtrack.jetbrains.com/issue/KT-78946"><code>KT-78946</code></a> Evaluation of variable with local class in type parameter leads to InventNamesForLocalClasses exception</li> </ul> <h3>Analysis API. FIR</h3> <ul> <li><a href="https://youtrack.jetbrains.com/issue/KT-68260"><code>KT-68260</code></a> K2 AA: InvalidFirElementTypeException “For CALLABLE_REFERENCE_EXPRESSION with text <code>::lam1</code>, unexpected element of type: no element found” with illegal callable reference call</li> <li><a href="https://youtrack.jetbrains.com/issue/KT-70896"><code>KT-70896</code></a> AA: False positive deprecation warning with override of built-in method in JDK mapped class</li> <li><a href="https://youtrack.jetbrains.com/issue/KT-84711"><code>KT-84711</code></a> K2 IDE sometimes loses FIR plugin-generated declarations after file changes</li> <li><a href="https://youtrack.jetbrains.com/issue/KT-84625"><code>KT-84625</code></a> Analysis API: collectDesignationPath fails for nested classes inside plugin-generated top-level classes</li> <li><a href="https://youtrack.jetbrains.com/issue/KT-84596"><code>KT-84596</code></a> Improve K2 Jooq completion performance</li> <li><a href="https://youtrack.jetbrains.com/issue/KT-84525"><code>KT-84525</code></a> KaValueParameterSymbol#getHasSynthesizedName returns false for FirDeclarationOrigin.SubstitutionOverride.DeclarationSite</li> <li><a href="https://youtrack.jetbrains.com/issue/KT-83546"><code>KT-83546</code></a> Kotlin analysis reach ClsCustomNavigationPolicy</li> <li><a href="https://youtrack.jetbrains.com/issue/KT-84259"><code>KT-84259</code></a> Move CommonDefaultImportsProvider to the frontend independent module</li> <li><a href="https://youtrack.jetbrains.com/issue/KT-82945"><code>KT-82945</code></a> Analysis API: KotlinIllegalArgumentExceptionWithAttachments: Expected FirResolvedTypeRef with ConeKotlinType but was FirUserTypeRefImpl</li> <li><a href="https://youtrack.jetbrains.com/issue/KT-71135"><code>KT-71135</code></a> AA: exception from sealed inheritors checker when <code>analyzeCopy</code></li> </ul> <h3>Analysis API. Infrastructure</h3> <h4>Fixes</h4> <ul> <li><a href="https://youtrack.jetbrains.com/issue/KT-83905"><code>KT-83905</code></a> Analysis API: Improve UX with test data</li> <li><a href="https://youtrack.jetbrains.com/issue/KT-84913"><code>KT-84913</code></a> Extract compiler classes used by the PSI & Analysis API to a separate module</li> <li><a href="https://youtrack.jetbrains.com/issue/KT-64986"><code>KT-64986</code></a> Analysis API: Implement Analysis API tests for different KMP Platforms</li> <li><a href="https://youtrack.jetbrains.com/issue/KT-84776"><code>KT-84776</code></a> The test data manager misses the redundancy check in the update mode</li> <li><a href="https://youtrack.jetbrains.com/issue/KT-84962"><code>KT-84962</code></a> The test data manager misses -ea flag</li> <li><a href="https://youtrack.jetbrains.com/issue/KT-84388"><code>KT-84388</code></a> Preserve the EOF status in the test data manager to avoid extra changes</li> <li><a href="https://youtrack.jetbrains.com/issue/KT-84362"><code>KT-84362</code></a> Analysis API tests produce many warnings due to "not yet loaded registry"</li> <li><a href="https://youtrack.jetbrains.com/issue/KT-84279"><code>KT-84279</code></a> Test Data Manager fails on a clean build</li> <li><a href="https://youtrack.jetbrains.com/issue/KT-83913"><code>KT-83913</code></a> Exclude compiler-based Analysis API tests from Git tracking</li> <li><a href="https://youtrack.jetbrains.com/issue/KT-80379"><code>KT-80379</code></a> Extract per-module test generators for AA tests</li> <li><a href="https://youtrack.jetbrains.com/issue/KT-84120"><code>KT-84120</code></a> Move CLI modules out of kotlin-compiler-fe10-for-ide</li> <li><a href="https://youtrack.jetbrains.com/issue/KT-83200"><code>KT-83200</code></a> Track external dependencies of the Analysis API modules</li> </ul> <h3>Analysis API. Light Classes</h3> <ul> <li><a href="https://youtrack.jetbrains.com/issue/KT-82434"><code>KT-82434</code></a> Light classes should prefer enum entries to properties</li> <li><a href="https://youtrack.jetbrains.com/issue/KT-84200"><code>KT-84200</code></a> SLC: return type is not boxed for delegated methods with generic original method</li> <li><a href="https://youtrack.jetbrains.com/issue/KT-72451"><code>KT-72451</code></a> "CCE: class PsiPrimitiveType cannot be cast to class PsiClassType" with same-named enum class and typealias</li> </ul> <h3>Analysis API. PSI</h3> <!-- raw HTML omitted --> </blockquote> <p>... (truncated)</p> </details> <details> <summary>Commits</summary> <ul> <li><a href=" |
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Kotlin MCP Client
An interactive CLI client that connects to any MCP server over STDIO and pipes queries through Anthropic's Claude API.
Overview
This sample demonstrates a complete MCP client workflow: launching an MCP server as a subprocess, discovering its tools, converting them to Anthropic's tool format, and running an interactive chat loop where Claude can call server tools on behalf of the user.
Prerequisites
- JDK 17+
- An
ANTHROPIC_API_KEYenvironment variable set with a valid Anthropic API key - An MCP server script to connect to (
.js,.py, or.jar)
Build & Run
Run the client, passing the path to an MCP server:
# Connect to a JVM server
./gradlew run --args="path/to/server.jar"
# Connect to a Python server
./gradlew run --args="path/to/server.py"
# Connect to a Node.js server
./gradlew run --args="path/to/build/index.js"
Note
The client uses STDIO transport, so it launches the MCP server as a subprocess. Ensure the server script is executable and is a valid
.js,.py, or.jarfile.
MCP Capabilities
From the client perspective, this sample demonstrates:
- Tool discovery — lists tools from the connected server and converts them to Anthropic's tool format.
- Tool invocation — when Claude's response requests a tool call, the client invokes the corresponding MCP tool and feeds the result back into the conversation.