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be06a71053Bumps [org.jetbrains.kotlin.jvm](https://github.com/JetBrains/kotlin) from 2.4.10 to 2.4.20. <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 2.4.20</h2> <h2>Changelog</h2> <h3>Analysis API</h3> <ul> <li><a href="https://youtrack.jetbrains.com/issue/KT-86546"><code>KT-86546</code></a> Check suspicious when over ConeKotlinType in ConeTypeCompatibilityChecker</li> <li><a href="https://youtrack.jetbrains.com/issue/KT-85418"><code>KT-85418</code></a> Implement an API for accessing deserialized file annotations in Analysis API</li> <li><a href="https://youtrack.jetbrains.com/issue/KT-74448"><code>KT-74448</code></a> K2. False positive MISSING_DEPENDENCY_SUPERCLASS in LinkedListTest.kt, kotlinx.coroutines</li> <li><a href="https://youtrack.jetbrains.com/issue/KT-85856"><code>KT-85856</code></a> containingSymbol of constructor property differs for local and non-local classes</li> <li><a href="https://youtrack.jetbrains.com/issue/KT-65417"><code>KT-65417</code></a> K2 IDE: KTOR false positive expect-actual matching error on enum class because of implicit clone() in non-JVM source sets</li> </ul> <h3>Analysis API. Code Compilation</h3> <ul> <li><a href="https://youtrack.jetbrains.com/issue/KT-76457"><code>KT-76457</code></a> K2 IDE / KMP Debugger: KISEWA “Cannot compile a common source without a JVM counterpart” on evaluating inline fun from common module inside jvm</li> </ul> <h3>Analysis API. FIR</h3> <ul> <li><a href="https://youtrack.jetbrains.com/issue/KT-70552"><code>KT-70552</code></a> No expects for actual</li> <li><a href="https://youtrack.jetbrains.com/issue/KT-69727"><code>KT-69727</code></a> K2 IDE. Wrong error in the editor on calling <code>clone</code> function of actual enum instance in non-jvm platform</li> <li><a href="https://youtrack.jetbrains.com/issue/KT-69726"><code>KT-69726</code></a> FP errors on declaring <code>fun clone()</code> in actual enum in not-jvm source-set</li> <li><a href="https://youtrack.jetbrains.com/issue/KT-86014"><code>KT-86014</code></a> Types are broken after remove parameter through change signature</li> <li><a href="https://youtrack.jetbrains.com/issue/KT-86363"><code>KT-86363</code></a> KotlinIllegalArgumentExceptionWithAttachments: No dangling modifier found on companion blocks</li> <li><a href="https://youtrack.jetbrains.com/issue/KT-86147"><code>KT-86147</code></a> Drop <code>kotlin.parallel.resolve.under.global.lock</code> registry key</li> <li><a href="https://youtrack.jetbrains.com/issue/KT-85543"><code>KT-85543</code></a> Avoid lazy resolve for the contracts phase if no constracts might be resolved</li> </ul> <h3>Analysis API. Infrastructure</h3> <ul> <li><a href="https://youtrack.jetbrains.com/issue/KT-84914"><code>KT-84914</code></a> Do not publish analysis-api-test-framework</li> <li><a href="https://youtrack.jetbrains.com/issue/KT-86986"><code>KT-86986</code></a> <code>kotlin-compiler-common-for-ide</code> bundles unrelated Analysis API modules</li> <li><a href="https://youtrack.jetbrains.com/issue/KT-86186"><code>KT-86186</code></a> Analysis API: Codebase tests run twice in some analysis modules — pick a single JUnit runner and migrate</li> <li><a href="https://youtrack.jetbrains.com/issue/KT-85360"><code>KT-85360</code></a> Drop kotlin-compiler-testdata-for-ide artifact</li> <li><a href="https://youtrack.jetbrains.com/issue/KT-85585"><code>KT-85585</code></a> Simplify the dependencies graph for the Analysis API modules</li> <li><a href="https://youtrack.jetbrains.com/issue/KT-85381"><code>KT-85381</code></a> Remove tests for the FE10 implementation</li> </ul> <h3>Analysis API. Light Classes</h3> <h4>New Features</h4> <ul> <li><a href="https://youtrack.jetbrains.com/issue/KT-84645"><code>KT-84645</code></a> Support resolving to companion block members & extensions from Java (light classes)</li> <li><a href="https://youtrack.jetbrains.com/issue/KT-80775"><code>KT-80775</code></a> Support PsiClass#getRecordComponents in light classes</li> </ul> <h4>Fixes</h4> <ul> <li><a href="https://youtrack.jetbrains.com/issue/KT-57537"><code>KT-57537</code></a> SLC: propagate default parameter value from (<code>@JvmOverloads</code>) <code>expect</code> declarations to <code>actual</code> declarations</li> <li><a href="https://youtrack.jetbrains.com/issue/KT-85040"><code>KT-85040</code></a> [Analysis API] Improve Java / Kotlin interop in KMP projects</li> <li><a href="https://youtrack.jetbrains.com/issue/KT-87301"><code>KT-87301</code></a> SymbolLightAccessorMethod#isValid returns false for delegated properties</li> <li><a href="https://youtrack.jetbrains.com/issue/KT-87171"><code>KT-87171</code></a> SLC: non-mapped Kotlin collection supertype is dropped from supertype list</li> <li><a href="https://youtrack.jetbrains.com/issue/KT-87250"><code>KT-87250</code></a> JvmExposeBoxed: light classes shouldn't be autogenerated for private declarations</li> <li><a href="https://youtrack.jetbrains.com/issue/KT-70428"><code>KT-70428</code></a> AA: good code is red when a Java class extends a Kotlin class implementing MutableList by delegation</li> <li><a href="https://youtrack.jetbrains.com/issue/KT-63568"><code>KT-63568</code></a> Symbol Light Classes: KtAnnotationApplicationWithArgumentsInfo.normalizedArguments() may work incorrectly when psi is not set</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>2.4.20</h2> <h3>Analysis API</h3> <ul> <li><a href="https://youtrack.jetbrains.com/issue/KT-86546"><code>KT-86546</code></a> Check suspicious when over ConeKotlinType in ConeTypeCompatibilityChecker</li> <li><a href="https://youtrack.jetbrains.com/issue/KT-85418"><code>KT-85418</code></a> Implement an API for accessing deserialized file annotations in Analysis API</li> <li><a href="https://youtrack.jetbrains.com/issue/KT-74448"><code>KT-74448</code></a> K2. False positive MISSING_DEPENDENCY_SUPERCLASS in LinkedListTest.kt, kotlinx.coroutines</li> <li><a href="https://youtrack.jetbrains.com/issue/KT-85856"><code>KT-85856</code></a> containingSymbol of constructor property differs for local and non-local classes</li> <li><a href="https://youtrack.jetbrains.com/issue/KT-65417"><code>KT-65417</code></a> K2 IDE: KTOR false positive expect-actual matching error on enum class because of implicit clone() in non-JVM source sets</li> </ul> <h3>Analysis API. Code Compilation</h3> <ul> <li><a href="https://youtrack.jetbrains.com/issue/KT-76457"><code>KT-76457</code></a> K2 IDE / KMP Debugger: KISEWA “Cannot compile a common source without a JVM counterpart” on evaluating inline fun from common module inside jvm</li> </ul> <h3>Analysis API. FIR</h3> <ul> <li><a href="https://youtrack.jetbrains.com/issue/KT-70552"><code>KT-70552</code></a> No expects for actual</li> <li><a href="https://youtrack.jetbrains.com/issue/KT-69727"><code>KT-69727</code></a> K2 IDE. Wrong error in the editor on calling <code>clone</code> function of actual enum instance in non-jvm platform</li> <li><a href="https://youtrack.jetbrains.com/issue/KT-69726"><code>KT-69726</code></a> FP errors on declaring <code>fun clone()</code> in actual enum in not-jvm source-set</li> <li><a href="https://youtrack.jetbrains.com/issue/KT-86014"><code>KT-86014</code></a> Types are broken after remove parameter through change signature</li> <li><a href="https://youtrack.jetbrains.com/issue/KT-86363"><code>KT-86363</code></a> KotlinIllegalArgumentExceptionWithAttachments: No dangling modifier found on companion blocks</li> <li><a href="https://youtrack.jetbrains.com/issue/KT-86147"><code>KT-86147</code></a> Drop <code>kotlin.parallel.resolve.under.global.lock</code> registry key</li> <li><a href="https://youtrack.jetbrains.com/issue/KT-85543"><code>KT-85543</code></a> Avoid lazy resolve for the contracts phase if no constracts might be resolved</li> </ul> <h3>Analysis API. Infrastructure</h3> <ul> <li><a href="https://youtrack.jetbrains.com/issue/KT-84914"><code>KT-84914</code></a> Do not publish analysis-api-test-framework</li> <li><a href="https://youtrack.jetbrains.com/issue/KT-86986"><code>KT-86986</code></a> <code>kotlin-compiler-common-for-ide</code> bundles unrelated Analysis API modules</li> <li><a href="https://youtrack.jetbrains.com/issue/KT-86186"><code>KT-86186</code></a> Analysis API: Codebase tests run twice in some analysis modules — pick a single JUnit runner and migrate</li> <li><a href="https://youtrack.jetbrains.com/issue/KT-85360"><code>KT-85360</code></a> Drop kotlin-compiler-testdata-for-ide artifact</li> <li><a href="https://youtrack.jetbrains.com/issue/KT-85585"><code>KT-85585</code></a> Simplify the dependencies graph for the Analysis API modules</li> <li><a href="https://youtrack.jetbrains.com/issue/KT-85381"><code>KT-85381</code></a> Remove tests for the FE10 implementation</li> </ul> <h3>Analysis API. Light Classes</h3> <h4>New Features</h4> <ul> <li><a href="https://youtrack.jetbrains.com/issue/KT-84645"><code>KT-84645</code></a> Support resolving to companion block members & extensions from Java (light classes)</li> <li><a href="https://youtrack.jetbrains.com/issue/KT-80775"><code>KT-80775</code></a> Support PsiClass#getRecordComponents in light classes</li> </ul> <h4>Fixes</h4> <ul> <li><a href="https://youtrack.jetbrains.com/issue/KT-57537"><code>KT-57537</code></a> SLC: propagate default parameter value from (<code>@JvmOverloads</code>) <code>expect</code> declarations to <code>actual</code> declarations</li> <li><a href="https://youtrack.jetbrains.com/issue/KT-85040"><code>KT-85040</code></a> [Analysis API] Improve Java / Kotlin interop in KMP projects</li> <li><a href="https://youtrack.jetbrains.com/issue/KT-87301"><code>KT-87301</code></a> SymbolLightAccessorMethod#isValid returns false for delegated properties</li> <li><a href="https://youtrack.jetbrains.com/issue/KT-87171"><code>KT-87171</code></a> SLC: non-mapped Kotlin collection supertype is dropped from supertype list</li> <li><a href="https://youtrack.jetbrains.com/issue/KT-87250"><code>KT-87250</code></a> JvmExposeBoxed: light classes shouldn't be autogenerated for private declarations</li> <li><a href="https://youtrack.jetbrains.com/issue/KT-70428"><code>KT-70428</code></a> AA: good code is red when a Java class extends a Kotlin class implementing MutableList by delegation</li> <li><a href="https://youtrack.jetbrains.com/issue/KT-63568"><code>KT-63568</code></a> Symbol Light Classes: KtAnnotationApplicationWithArgumentsInfo.normalizedArguments() may work incorrectly when psi is not set</li> <li><a href="https://youtrack.jetbrains.com/issue/KT-36740"><code>KT-36740</code></a> MPP: False-positive incompatible types in .java when using expect-class returned by non-expect member from common when actual is actual typealias</li> </ul> <!-- raw HTML omitted --> </blockquote> <p>... (truncated)</p> </details> <details> <summary>Commits</summary> <ul> <li><a href=" |
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| .. | ||
| kotlin-mcp-client | ||
| kotlin-mcp-server | ||
| kotlinlang-mcp-server | ||
| notebooks | ||
| simple-streamable-server | ||
| weather-stdio-server | ||
| README.md | ||
Kotlin MCP SDK Samples
Runnable projects demonstrating MCP server and client implementations with the Kotlin MCP SDK. For background on the protocol itself, see the MCP documentation.
Overview
| Sample | Type | Transport | MCP Features |
|---|---|---|---|
| simple-streamable-server | Server | Streamable HTTP | Tools, Resources, Prompts, Logging |
| kotlinlang-mcp-server | Server | Streamable HTTP | Tools |
| kotlin-mcp-server | Server | STDIO, SSE | Tools, Resources, Prompts |
| weather-stdio-server | Server | STDIO | Tools |
| kotlin-mcp-client | Client | STDIO | Tool discovery & invocation |
| notebooks | Client (Notebook) | Streamable HTTP | Tool discovery & invocation |
Getting Started
- Building a server? Start with simple-streamable-server — it uses the recommended Streamable HTTP transport and covers tools, resources, prompts, and logging.
- Building a client? Open the notebooks sample for a step-by-step walkthrough, or see kotlin-mcp-client for a full CLI client with Anthropic API integration.
Samples
Simple Streamable HTTP Server
A minimal Streamable HTTP server with optional Bearer token authentication. Demonstrates tools
(greet, multi-greet), a prompt template, a resource, and server-to-client logging notifications.
Read more →
Kotlinlang MCP Server
A Streamable HTTP server that exposes the official Kotlin documentation (kotlinlang.org) to LLM clients — full-text search via Algolia and page retrieval in markdown. Demonstrates wrapping a real external API in an MCP server with in-memory caching. Read more →
Kotlin MCP Server
A multi-transport server supporting STDIO, SSE (plain), and SSE (Ktor plugin). Useful for exploring different transport modes side by side. Read more →
Weather STDIO Server
A focused STDIO server that exposes weather forecast and alert tools backed by the weather.gov API. Includes Claude Desktop integration instructions. Read more →
Kotlin MCP Client
An interactive CLI client that connects to any MCP server over STDIO and routes queries through Anthropic's Claude API, bridging MCP tools with LLM conversations. Read more →
MCP Client Notebook
A Kotlin notebook that connects to a remote MCP server via Streamable HTTP and demonstrates ping, tool listing, and tool invocation — all in an interactive cell-by-cell format. Read more →