chore(deps): update dependency io.modelcontextprotocol:kotlin-sdk-client to v0.12.0

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
io.modelcontextprotocol:kotlin-sdk-client	0.11.0 → 0.12.0

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Release Notes

modelcontextprotocol/kotlin-sdk (io.modelcontextprotocol:kotlin-sdk-client)

v0.12.0

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Description

Adds sampling-with-tools per SEP-1577, JSON Schema dialect declaration on tool schemas, server-side tool name validation, and capability extensions; fixes SSE reconnect on the same session and stops swallowing CancellationException.

Breaking Changes

Sampling messages can carry tool calls and results (SEP-1577) by @​devcrocod in #​718

SamplingMessage.content is now typed as a new SamplingMessageContent supertype, with MediaContent (text/image/audio), ToolUseContent, and ToolResultContent as variants. MediaContent still exists and now extends SamplingMessageContent, so most source code that constructs sampling messages compiles unchanged — but the binary signatures of SamplingMessage, CreateMessageResult, and related types have changed. ClientCapabilities.sampling is also now a typed Sampling object instead of a raw JsonObject. Recompilation is required; consumers reading sampling as JsonObject must migrate to the typed accessors.

watchosX64 and tvosX64 Kotlin/Native targets removed by @​devcrocod in #​727

These targets have been deprecated upstream. Migrate to the corresponding ARM/simulator targets (watchosArm64, watchosSimulatorArm64, tvosArm64, tvosSimulatorArm64).

Features

• Add $schema field to ToolSchema, declaring JSON Schema 2020-12 as the default dialect (SEP-1613) by @​devcrocod in #​696
• Validate tool names at registration time on the server, following the MCP tool naming standard (SEP-986) by @​devcrocod in #​695
• Add extensions field to ClientCapabilities and ServerCapabilities for advertising supported MCP extensions during the initialize handshake by @​eritscher in #​678

Fixed

• Validate the mcp-protocol-version HTTP header on initialization requests and correct DEFAULT_NEGOTIATED_PROTOCOL_VERSION to match the spec by @​devcrocod in #​697
• Propagate CancellationException instead of logging it as an error by @​devcrocod in #​706
• Evict stale GET SSE stream mapping on reconnect so a new GET on the same session is no longer silently rejected by the leftover entry from the previous stream by @​amr in #​716

Maintenance

• Add kotlinlang MCP server sample with search and get_page tools by @​devcrocod in #​713
• Migrate detekt to a buildSrc convention plugin with a fully explicit, version-locked YAML config by @​devcrocod in #​729
• Add Streamable HTTP integration tests for pagination, bad-request handling, and logging by @​jskjw157 in #​613
• Remove unused OpenAPI Generator plugin and configuration by @​devcrocod in #​683
• Remove Codecov configuration in favor of kover by @​devcrocod in #​691
• Remove redundant JUnit XML report configuration by @​devcrocod in #​728
• Remove IDEA files tied to the incompatible detekt IDE plugin by @​devcrocod in #​714
• Add Node.js setup to the release workflow so TypeScript integration tests run on macOS runners by @​devcrocod in #​684

Dependencies

• Kotlin to v2.3.21 in #​704, #​723
• kotlinx.serialization-json to v1.11.0 in #​687

New Contributors

• @​eritscher made their first contribution in #​678
• @​amr made their first contribution in #​716

Full Changelog: modelcontextprotocol/kotlin-sdk@0.11.1...0.12.0

v0.11.1

Compare Source

Description

Fixes an SSE stream crash on Netty when clients connect to the Streamable HTTP GET endpoint.

Fixed

• Fixed GET SSE stream crash on Netty in Streamable HTTP where appendSseHeaders() was called after response headers were already committed, causing UnsupportedOperationException and client retry loops by @​devcrocod in #​681

Dependencies

• mcp-kotlin to v0.11.0 in #​672, #​673, #​675, #​676
• Ktor BOM to v3.3.3 in #​650, #​653, #​656
• Kotest assertions to v6.1.11 in #​674
• anthropic-java to v2.19.0 in #​671
• @​modelcontextprotocol/sdk to v1.29.0, @​types/node update in #​677
• hono to v4.12.12 in #​680
• @​hono/node-server to v1.19.13 in #​679

Full Changelog: modelcontextprotocol/kotlin-sdk@0.11.0...0.11.1

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