modularize sdk (#208)

* Modularize SDK: migrated client and server implementations to separate modules. Removed old configuration files and reorganized the source code structure

* add support native targets and update js/wasm configurations

* Refactor sample projects: add samples as composite builds, replace hardcoded dependencies with version catalog, remove obsolete gradle wrapper files

* Update .gitignore: exclude SWE agent directories (.claude/ and .junie/)

* Refine CodeQL workflow: update Kotlin build steps to target individual modules separately instead of building all at once

buildSrc/src/main/kotlin/mcp.dokka.gradle.kts

@@ -0,0 +1,23 @@
+import org.jetbrains.dokka.gradle.engine.parameters.VisibilityModifier
+
+plugins {
+    id("org.jetbrains.dokka")
+}
+
+dokka {
+    moduleName.set("MCP Kotlin SDK - ${project.name}")
+
+    dokkaSourceSets.configureEach {
+        sourceLink {
+            localDirectory = projectDir.resolve("src")
+            remoteUrl("https://github.com/modelcontextprotocol/kotlin-sdk/tree/main/${project.name}/src")
+            remoteLineSuffix = "#L"
+        }
+
+        documentedVisibilities(VisibilityModifier.Public)
+    }
+
+    dokkaPublications.html {
+        outputDirectory = rootProject.layout.projectDirectory.dir("docs/${project.name}")
+    }
+}

buildSrc/src/main/kotlin/mcp.jreleaser.gradle.kts

@@ -0,0 +1,73 @@
+import org.jreleaser.model.Active
+
+plugins {
+    id("org.jreleaser")
+    id("mcp.publishing")
+}
+
+jreleaser {
+    gitRootSearch = true
+    strict = true
+
+    signing {
+        active = Active.ALWAYS
+        armored = true
+        artifacts = true
+        files = true
+    }
+
+    deploy {
+        active = Active.ALWAYS
+        maven {
+            active = Active.ALWAYS
+            mavenCentral.create("ossrh") {
+                active = Active.ALWAYS
+                url = "https://central.sonatype.com/api/v1/publisher"
+                applyMavenCentralRules = false
+                maxRetries = 240
+                stagingRepository(layout.buildDirectory.dir("staging-deploy").get().asFile.path)
+
+                // workaround: https://github.com/jreleaser/jreleaser/issues/1784
+                afterEvaluate {
+                    publishing.publications.forEach { publication ->
+                        if (publication is MavenPublication) {
+                            val pubName = publication.name
+
+                            if (!pubName.contains("jvm", ignoreCase = true)
+                                && !pubName.contains("metadata", ignoreCase = true)
+                                && !pubName.contains("kotlinMultiplatform", ignoreCase = true)
+                            ) {
+                                artifactOverride {
+                                    artifactId = when {
+                                        pubName.contains("wasm", ignoreCase = true) ->
+                                            "${project.name}-wasm-${pubName.lowercase().substringAfter("wasm")}"
+
+                                        else -> "${project.name}-${pubName.lowercase()}"
+                                    }
+                                    jar = false
+                                    verifyPom = false
+                                    sourceJar = false
+                                    javadocJar = false
+                                }
+                            }
+                        }
+                    }
+                }
+            }
+        }
+
+        release {
+            github {
+                enabled = false
+                skipRelease = true
+                skipTag = true
+            }
+        }
+
+        checksum {
+            individual = false
+            artifacts = false
+            files = false
+        }
+    }
+}

buildSrc/src/main/kotlin/mcp.multiplatform.gradle.kts

@@ -0,0 +1,50 @@
+@file:OptIn(ExperimentalWasmDsl::class)
+
+import org.jetbrains.kotlin.gradle.ExperimentalWasmDsl
+import org.jetbrains.kotlin.gradle.dsl.ExplicitApiMode
+import org.jetbrains.kotlin.gradle.dsl.JvmTarget
+
+plugins {
+    kotlin("multiplatform")
+    kotlin("plugin.serialization")
+    id("org.jetbrains.kotlinx.atomicfu")
+}
+
+// Generation library versions
+val generateLibVersion by tasks.registering {
+    val outputDir = layout.buildDirectory.dir("generated-sources/libVersion")
+    outputs.dir(outputDir)
+
+    doLast {
+        val sourceFile = outputDir.get().file("io/modelcontextprotocol/kotlin/sdk/LibVersion.kt").asFile
+        sourceFile.parentFile.mkdirs()
+        sourceFile.writeText(
+            """
+            package io.modelcontextprotocol.kotlin.sdk
+
+            public const val LIB_VERSION: String = "${project.version}"
+            
+            """.trimIndent()
+        )
+    }
+}
+
+kotlin {
+    jvm {
+        compilerOptions.jvmTarget = JvmTarget.JVM_1_8
+    }
+    macosX64(); macosArm64()
+    linuxX64(); linuxArm64()
+    mingwX64()
+    js { nodejs() }
+    wasmJs { nodejs() }
+
+    explicitApi = ExplicitApiMode.Strict
+    jvmToolchain(21)
+
+    sourceSets {
+        commonMain {
+            kotlin.srcDir(generateLibVersion)
+        }
+    }
+}

buildSrc/src/main/kotlin/mcp.publishing.gradle.kts

@@ -0,0 +1,66 @@
+plugins {
+    `maven-publish`
+    signing
+}
+
+val javadocJar by tasks.registering(Jar::class) {
+    archiveClassifier.set("javadoc")
+}
+
+publishing {
+    publications.withType<MavenPublication>().configureEach {
+        if (name.contains("jvm", ignoreCase = true)) {
+            artifact(javadocJar)
+        }
+
+        pom {
+            name = project.name
+            description = "Kotlin implementation of the Model Context Protocol (MCP)"
+            url = "https://github.com/modelcontextprotocol/kotlin-sdk"
+
+            licenses {
+                license {
+                    name = "MIT License"
+                    url = "https://github.com/modelcontextprotocol/kotlin-sdk/blob/main/LICENSE"
+                    distribution = "repo"
+                }
+            }
+
+            developers {
+                developer {
+                    id = "Anthropic"
+                    name = "Anthropic Team"
+                    organization = "Anthropic"
+                    organizationUrl = "https://www.anthropic.com"
+                }
+            }
+
+            scm {
+                url = "https://github.com/modelcontextprotocol/kotlin-sdk"
+                connection = "scm:git:git://github.com/modelcontextprotocol/kotlin-sdk.git"
+                developerConnection = "scm:git:git@github.com:modelcontextprotocol/kotlin-sdk.git"
+            }
+        }
+    }
+
+    repositories {
+        maven {
+            name = "staging"
+            url = uri(layout.buildDirectory.dir("staging-deploy"))
+        }
+    }
+}
+
+signing {
+    val gpgKeyName = "GPG_SIGNING_KEY"
+    val gpgPassphraseName = "SIGNING_PASSPHRASE"
+    val signingKey = providers.environmentVariable(gpgKeyName)
+        .orElse(providers.gradleProperty(gpgKeyName))
+    val signingPassphrase = providers.environmentVariable(gpgPassphraseName)
+        .orElse(providers.gradleProperty(gpgPassphraseName))
+
+    if (signingKey.isPresent) {
+        useInMemoryPgpKeys(signingKey.get(), signingPassphrase.get())
+        sign(publishing.publications)
+    }
+}