Commit graph kotlin-sdk/kotlin-sdk-core
Author SHA1 Message Date
Nathaniel Lombardi
6fee82ff1a
Mark DSL functions for types as public (#472)
<!-- Provide a brief summary of your changes -->

## Motivation and Context
<!-- Why is this change needed? What problem does it solve? -->
The dsl builders in [this
commit](74c93745cd (diff-598edaa01d))
were mistakenly marked internal and are therefore unusable. I have
simply marked them as public.

## How Has This Been Tested?
<!-- Have you tested this in a real application? Which scenarios were
tested? -->

## Breaking Changes
No

## Types of changes
<!-- What types of changes does your code introduce? Put an `x` in all
the boxes that apply: -->
- [x] Bug fix (non-breaking change which fixes an issue)
- [ ] New feature (non-breaking change which adds functionality)
- [ ] Breaking change (fix or feature that would cause existing
functionality to change)
- [ ] Documentation update

## Checklist
<!-- Go over all the following points, and put an `x` in all the boxes
that apply. -->
- [ ] I have read the [MCP
Documentation](https://modelcontextprotocol.io)
- [ ] My code follows the repository's style guidelines
- [x] New and existing tests pass locally
- [ ] I have added appropriate error handling
- [ ] I have added or updated documentation as needed

## Additional context
<!-- Add any other context, implementation notes, or design decisions
-->

---------

Co-authored-by: Konstantin Pavlov <1517853+kpavlov@users.noreply.github.com>
2026-01-10 01:12:29 +02:00
Konstantin Pavlov
288d46cdde
fix: Update/Fix build workflow (#474)
# Update/Fix build workflow

- `macos-latest-xlarge` is no longer available. Switch to cheaper
runner: `macos-latest-xlarge` -> `macos-latest`
- Refactor build to run matrix job under Linux and macOS
- Tune caching GH caching
- Add junit and logger properties
- Downgrade Junit to 5.14.2
- Extract `ProcessBuilder` creation logic into helper functions
- Disable `StdioClientTransportTest` on windows temporary

## How Has This Been Tested?
CI

## Breaking Changes
Functionally - no. Outdated/broken TypeScript tests were disabled

## Types of changes
<!-- What types of changes does your code introduce? Put an `x` in all
the boxes that apply: -->
- [x] Bug fix (non-breaking change which fixes an issue)
- [x] CI Update

## Checklist
<!-- Go over all the following points, and put an `x` in all the boxes
that apply. -->
- [ ] I have read the [MCP
Documentation](https://modelcontextprotocol.io)
- [ ] My code follows the repository's style guidelines
- [ ] New and existing tests pass locally
- [ ] I have added appropriate error handling
- [ ] I have added or updated documentation as needed

## Additional context
GitHub actions workflows were blocked because the selected
"macos-latest-xlarge" runner, which is not available for the free
open-source plan. With "macos-latest" workflow works.
2026-01-09 22:48:31 +02:00
Pavel Gorgulov
10a0b67204
[WIP] StreamableHttpServerTransport implementation (#449)
# [WIP] StreamableHttpServerTransport implementation

- Implement StreamableHttpServerTransport for MCP spec
- Support both SSE streaming and direct HTTP JSON responses
- Add event store interface for resumability

> [!IMPORTANT]  
> The work is in progress. StreamableHttpServerTransport is not
production-ready yet!!!

Based on #235 

## How Has This Been Tested?
<!-- Have you tested this in a real application? Which scenarios were
tested? -->

## Breaking Changes
None

## Types of changes
- [ ] Bug fix (non-breaking change which fixes an issue)
- [x] New feature (non-breaking change which adds functionality)
- [ ] Breaking change (fix or feature that would cause existing
functionality to change)
- [ ] Documentation update

## Checklist
- [x] I have read the [MCP
Documentation](https://modelcontextprotocol.io)
- [x] My code follows the repository's style guidelines
- [x] New and existing tests pass locally
- [x] I have added appropriate error handling
- [x] I have added or updated documentation as needed
2025-12-05 19:51:19 +02:00
Konstantin Pavlov
6ec6d3c52f
Better exception handling in StdioClientTransport (#444)
# Better exception handling in StdioClientTransport

Refactor `McpException` for improved handling with convenience
constructors and enhanced exception wrapping logic in
`StdioClientTransport`. Update tests to use `kotest` matchers and add
JUnit parameterized tests for exception handling.

## Motivation and Context
#442 follow up 

## How Has This Been Tested?
<!-- Have you tested this in a real application? Which scenarios were
tested? -->

## Breaking Changes
<!-- Will users need to update their code or configurations? -->

## Types of changes
<!-- What types of changes does your code introduce? Put an `x` in all
the boxes that apply: -->
- [x] Bug fix (non-breaking change which fixes an issue)
- [ ] New feature (non-breaking change which adds functionality)
- [ ] Breaking change (fix or feature that would cause existing
functionality to change)
- [ ] Documentation update

## Checklist
<!-- Go over all the following points, and put an `x` in all the boxes
that apply. -->
- [ ] I have read the [MCP
Documentation](https://modelcontextprotocol.io)
- [ ] My code follows the repository's style guidelines
- [ ] New and existing tests pass locally
- [ ] I have added appropriate error handling
- [ ] I have added or updated documentation as needed

## Additional context
<!-- Add any other context, implementation notes, or design decisions
-->
2025-12-04 15:09:54 +02:00
Konstantin Pavlov
191b76863d
#107 Monitor STDERR and refactor StdioClientTransport to use flows (#442) 2025-12-04 09:18:32 +02:00
Konstantin Pavlov
6dd9c80335
Add convenience constructors to JSONRPCRequest (#336)
- Add convenience constructors to JSONRPCRequest
- Make UUID string a default JSONRPCRequest

## Motivation and Context
To create request objects more easily

## How Has This Been Tested?
Unit tests

## Breaking Changes
No, this is a new API

## Types of changes
<!-- What types of changes does your code introduce? Put an `x` in all
the boxes that apply: -->
- [ ] Bug fix (non-breaking change which fixes an issue)
- [x] New feature (non-breaking change which adds functionality)
- [ ] Breaking change (fix or feature that would cause existing
functionality to change)
- [ ] Documentation update

## Checklist
<!-- Go over all the following points, and put an `x` in all the boxes
that apply. -->
- [x] I have read the [MCP
Documentation](https://modelcontextprotocol.io)
- [x] My code follows the repository's style guidelines
- [ ] New and existing tests pass locally
- [ ] I have added appropriate error handling
- [ ] I have added or updated documentation as needed

## Additional context
<!-- Add any other context, implementation notes, or design decisions
-->
2025-11-20 22:06:21 +02:00
Pavel Gorgulov
2b9dfd9466
Add options in Transport.send method (#408)
Add support for `TransportSendOptions` in `Transport.send` method

## Motivation and Context
This change extends the `Transport.send` method signature to support
advanced transport features like resumption tokens and progress
callbacks. This is needed to enable:
- Long-running request resumption after reconnection
- Request-response association tracking
- Progress token handling in transport layer

needed for #235 

## How Has This Been Tested?
All transport tests passed

## Breaking Changes
Yes, it’s necessary to update the custom Transport implementations.
For users who rely on the transports provided by the sdk, there’s no
breaking change

## Types of changes
- [x] Bug fix (non-breaking change which fixes an issue)
- [x] New feature (non-breaking change which adds functionality)
- [ ] Breaking change (fix or feature that would cause existing
functionality to change)
- [ ] Documentation update

## Checklist
- [x] I have read the [MCP
Documentation](https://modelcontextprotocol.io)
- [x] My code follows the repository's style guidelines
- [x] New and existing tests pass locally
- [x] I have added appropriate error handling
- [x] I have added or updated documentation as needed
2025-11-20 20:17:15 +01:00
Pavel Gorgulov
74c93745cd
Proposal: DSL Builders for request types (#399)
This PR introduces type-safe DSL builders for all MCP request types,
making it easier to construct requests
  
  ### Current Solution
  
  All request types now have DSL builders:
  ```kotlin
  // Initialize request
  val request = initializeRequest {
      protocolVersion = "2024-11-05"
      capabilities {
          sampling(ClientCapabilities.sampling)
          roots(listChanged = true)
      }
      info("MyClient", "1.0.0")
  }

  // Create message request with conversation
  val messageRequest = createMessageRequest {
      maxTokens = 1000
      systemPrompt = "You are a helpful assistant"
      messages {
          user { "What is the capital of France?" }
          assistant { "The capital of France is Paris." }
          user { "What about Germany?" }
      }
  }

  // Call tool request
  val toolRequest = callToolRequest {
      name = "searchDatabase"
      arguments {
          put("query", "users")
          put("limit", 10)
      }
  }

  // Elicit request with schema
  val elicitRequest = elicitationRequest {
      message = "Please provide your contact information"
      requestedSchema {
          properties {
              put("email", JsonObject(mapOf(
                  "type" to JsonPrimitive("string"),
                  "description" to JsonPrimitive("Your email address")
              )))
          }
          required = listOf("email")
      }
  }
```

Each DSL builder includes:
  - Clear separation of required (but runtime) vs optional fields
  - Multiple usage examples
  - Concise error messages with examples when required fields are missing
  - Cross-references to related types

### Design Considerations

1. Function Naming Convention

The current naming convention (e.g., initializeRequest, callToolRequest) might be confusing since these functions don't send requests, they just build request objects.

Alternative approach: Add a build prefix to clarify intent:
  - `initializeRequest` → `buildInitializeRequest`
  - `callToolRequest` → `buildCallToolRequest`
  - `createMessageRequest` → `buildCreateMessageRequest`

This would make it clearer that these are builder functions.

2. Runtime vs Compile-Time Validation

Currently, required fields are validated at runtime in the `build()` method:

```kotlin
val request = initializeRequest {
      protocolVersion = "2024-11-05"
      // Missing required fields: capabilities, info
      // Error thrown at runtime ❌
}
```

Alternative approach: Use Compose UI style where required parameters are in the function signature:

```kotlin
fun initializeRequest(
      protocolVersion: String,
      capabilities: ClientCapabilities,
      info: Implementation,
      block: InitializeRequestBuilder.() -> Unit = {}
  ): InitializeRequest
```

```kotlin
// Usage
val request = initializeRequest(
  protocolVersion = "2024-11-05",
capabilities = ClientCapabilities(sampling =
ClientCapabilities.sampling),
  info = Implementation("MyClient", "1.0.0")
 ) {
      // Optional fields only
      meta { put("key", "value") }
}
```

Pros:
- Compile-time safety for required fields ✅
- Clear which fields are required ✅
- Better IDE autocomplete ✅

Cons:
- Multiple trailing lambdas can be confusing:

```kotlin
// When required fields include lambdas
val request = elicitationRequest(
      message = "Enter info",
      requestedSchema = { /* lambda 1 */ }
) { /* lambda 2 for optional fields */ }
```

- Less consistent DSL feel
- More verbose for simple cases
2025-11-20 19:46:07 +01:00
Pavel Gorgulov
e6e38ac0a8
Fix providing progressToken with request (#405)
## Motivation and Context
fix #220 

## How Has This Been Tested?
locally

## Breaking Changes
None

## Types of changes
- [x] Bug fix (non-breaking change which fixes an issue)
- [ ] New feature (non-breaking change which adds functionality)
- [ ] Breaking change (fix or feature that would cause existing
functionality to change)
- [ ] Documentation update

## Checklist
- [x] I have read the [MCP
Documentation](https://modelcontextprotocol.io)
- [x] My code follows the repository's style guidelines
- [x] New and existing tests pass locally
- [x] I have added appropriate error handling
- [x] I have added or updated documentation as needed
2025-11-20 19:21:20 +01:00
Pavel Gorgulov
666cfd6b82
Add test with new schema types (#389)
Add tests with new schema types

## Motivation and Context
<!-- Why is this change needed? What problem does it solve? -->

## How Has This Been Tested?
The repository currently contains duplicated tests:
- tests using the new schema
- tests using the old schema for compatibility checks. they will be
removed once the deprecation level is raised

## Breaking Changes
No

## Types of changes
- [ ] Bug fix (non-breaking change which fixes an issue)
- [ ] New feature (non-breaking change which adds functionality)
- [ ] Breaking change (fix or feature that would cause existing
functionality to change)
- [ ] Documentation update
- [x] Testing

## Checklist
- [x] I have read the [MCP
Documentation](https://modelcontextprotocol.io)
- [x] My code follows the repository's style guidelines
- [x] New and existing tests pass locally
- [x] I have added appropriate error handling
- [x] I have added or updated documentation as needed

---------

Co-authored-by: Konstantin Pavlov <1517853+kpavlov@users.noreply.github.com>
2025-11-14 11:39:43 +02:00
Pavel Gorgulov
4aeed923f6
Add warning message to ExperimentalMcpApi annotation and change level (#398)
- add the warning message to `ExperimentalMcpApi` annotation
- change level from error to warning

## Types of changes
- [ ] Bug fix (non-breaking change which fixes an issue)
- [ ] New feature (non-breaking change which adds functionality)
- [ ] Breaking change (fix or feature that would cause existing
functionality to change)
- [x] Documentation update

## Checklist
- [x] I have read the [MCP
Documentation](https://modelcontextprotocol.io)
- [x] My code follows the repository's style guidelines
- [x] New and existing tests pass locally
- [ ] I have added appropriate error handling
- [x] I have added or updated documentation as needed
2025-11-13 22:05:45 +02:00
Konstantin Pavlov
93d544e618
Add experimental mcpClient(...) factory method (#396)
- Introduced `@ExperimentalMcpApi` annotation to mark experimental APIs.
- Added `mcpClient` function for initializing and connecting MCP
clients.
- Modified tests to utilize the new `mcpClient` function.
- Refactored variable naming in transport tests for improved
readability.

## Motivation and Context
To improve the creation of the MCP Client experience.

## How Has This Been Tested?
Integration test updated

## Breaking Changes
No

## Types of changes
<!-- What types of changes does your code introduce? Put an `x` in all
the boxes that apply: -->
- [ ] Bug fix (non-breaking change which fixes an issue)
- [x] New feature (non-breaking change which adds functionality)
- [ ] Breaking change (fix or feature that would cause existing
functionality to change)
- [ ] Documentation update

## Checklist
<!-- Go over all the following points, and put an `x` in all the boxes
that apply. -->
- [x] I have read the [MCP
Documentation](https://modelcontextprotocol.io)
- [x] My code follows the repository's style guidelines
- [x] New and existing tests pass locally
- [ ] I have added appropriate error handling
- [ ] I have added or updated documentation as needed

## Additional context
<!-- Add any other context, implementation notes, or design decisions
-->
2025-11-12 20:53:25 +02:00
Konstantin Pavlov
8bdbd36c32
Add backwards compatibility constructors and tests (#395)
- Updated integration tests to include assertions for `meta` being
`null` in the `listTools`, `listResources`, `readResource`, and
`callTool` results.
- Renamed test cases in `SseServerIntegrationTest` for clarity.
- Added (deprecated) synthetic constructors for various request
parameter classes.
- Enhanced naming conventions and structure in integration test cases.
- Replaced `throw Error(...)` with `error(...)` for cleaner error
handling.

## Motivation and Context
To verify backwards-compatibility after schema change

## How Has This Been Tested?
CI, integration tests, regression tests (samples)

## Breaking Changes
<!-- Will users need to update their code or configurations? -->

## Types of changes
<!-- What types of changes does your code introduce? Put an `x` in all
the boxes that apply: -->
- [ ] Bug fix (non-breaking change which fixes an issue)
- [ ] New feature (non-breaking change which adds functionality)
- [ ] Breaking change (fix or feature that would cause existing
functionality to change)
- [ ] Documentation update
- [x] Test update

## Checklist
<!-- Go over all the following points, and put an `x` in all the boxes
that apply. -->
- [x] I have read the [MCP
Documentation](https://modelcontextprotocol.io)
- [x] My code follows the repository's style guidelines
- [ ] New and existing tests pass locally
- [ ] I have added appropriate error handling
- [ ] I have added or updated documentation as needed

## Additional context
<!-- Add any other context, implementation notes, or design decisions
-->
2025-11-12 20:18:57 +02:00
Ruslan Ibrahimau (Ibragimov)
31fd6d93da
Kotlin-MCP can't be used without ktor-bom starting from 0.7.5 (#390) (#392) 2025-11-12 15:32:54 +02:00
Konstantin Pavlov
5636faf60c
Updated ServerPromptsTest, move AbstractTransport to it's own file (#376)
# Refactor and enhance prompt handling logic and tests, update Kotest
version and modularize `AbstractTransport`

- Added more post-conditions/scenarios to ServerPromptsTest
- Extracted `AbstractTransport` to a dedicated file for modularity.
- Improved Protocol connection state validation: When disconnected, the
Protocol will throw `IllegalStateException` instead of `Error`.
- Minor Kotlin fixes and suppressions to improve code quality.

## Motivation and Context

Improve test scenarios in ServerPromptsTest 

## How Has This Been Tested?
Integration tests updated

## Breaking Changes
When disconnected, the Protocol will throw `IllegalStateException`
instead of `Error`.

## Types of changes
<!-- What types of changes does your code introduce? Put an `x` in all
the boxes that apply: -->
- [ ] Bug fix (non-breaking change which fixes an issue)
- [ ] New feature (non-breaking change which adds functionality)
- [x] Breaking change (fix or feature that would cause existing
functionality to change)
- [ ] Documentation update
- [x] Test update
- [x] Refactoring

## Checklist
<!-- Go over all the following points, and put an `x` in all the boxes
that apply. -->
- [x] I have read the [MCP
Documentation](https://modelcontextprotocol.io)
- [x] My code follows the repository's style guidelines
- [x] New and existing tests pass locally
- [ ] I have added appropriate error handling
- [ ] I have added or updated documentation as needed

## Additional context
<!-- Add any other context, implementation notes, or design decisions
-->
2025-11-12 14:40:33 +02:00
Pavel Gorgulov
01de6e6800
Raise the version of the supported specification (#391) 2025-11-12 07:54:46 +02:00
Pavel Gorgulov
13f858d5d2
Add new helper properties to request and notification types (#388)
Add properties for types of new schema

## Motivation and Context
Added getters to simplify access to properties in request and
notification types.

## How Has This Been Tested?
All tests pass 

## Breaking Changes
None

## Types of changes
- [ ] Bug fix (non-breaking change which fixes an issue)
- [x] New feature (non-breaking change which adds functionality)
- [ ] Breaking change (fix or feature that would cause existing
functionality to change)
- [ ] Documentation update

## Checklist
- [x] I have read the [MCP
Documentation](https://modelcontextprotocol.io)
- [x] My code follows the repository's style guidelines
- [x] New and existing tests pass locally
- [x] I have added appropriate error handling
- [x] I have added or updated documentation as needed
2025-11-11 15:55:58 +02:00
Pavel Gorgulov
21393e7ce3
New MCP Schema types (#386)
Implement the last version of the mcp schema and complete restructuring
of the mcp schema implementation from a monolithic `types.kt` file into
separate files.

- #158 
- #185 
- #353 
- #298 
- #248 

## Motivation and Context
The previous implementation of the mcp schema was outdated and contained
several issues. In addition, it stored all mcp types in a single large
file, which made maintenance and further development more difficult

## How Has This Been Tested?
All tests passed

## Breaking Changes
Yes. The new types are now located in a separate package. Additionally,
many types have new parameters and modified constructors

## Types of changes
- [x] Bug fix (non-breaking change which fixes an issue)
- [x] New feature (non-breaking change which adds functionality)
- [x] Breaking change (fix or feature that would cause existing
functionality to change)
- [ ] Documentation update

## Checklist
- [x] I have read the [MCP
Documentation](https://modelcontextprotocol.io)
- [x] My code follows the repository's style guidelines
- [x] New and existing tests pass locally
- [x] I have added appropriate error handling
- [x] I have added or updated documentation as needed

## Additional context
to adopt the new structure:
**Before:**
```kotlin
  import io.modelcontextprotocol.kotlin.sdk.InitializeRequest
  import io.modelcontextprotocol.kotlin.sdk.Resource
```

**After:**
```kotlin
  import io.modelcontextprotocol.kotlin.sdk.types.InitializeRequest
  import io.modelcontextprotocol.kotlin.sdk.types.Resource
```
2025-11-11 12:25:23 +01:00
Konstantin Pavlov
e6432dbf26
Replace Instant with String for lastModified in Annotations (#383)
Replace `Instant` with `String` for `lastModified` in `Annotations`

## Motivation and Context
To fix serialization/kotlin library version conflicts 

## How Has This Been Tested?
Unit test

## Breaking Changes
Yes

## Types of changes
<!-- What types of changes does your code introduce? Put an `x` in all
the boxes that apply: -->
- [x] Bug fix (non-breaking change which fixes an issue)
- [ ] New feature (non-breaking change which adds functionality)
- [x] Breaking change (fix or feature that would cause existing
functionality to change)
- [ ] Documentation update

## Checklist
<!-- Go over all the following points, and put an `x` in all the boxes
that apply. -->
- [x] I have read the [MCP
Documentation](https://modelcontextprotocol.io)
- [x] My code follows the repository's style guidelines
- [ ] New and existing tests pass locally
- [ ] I have added appropriate error handling
- [ ] I have added or updated documentation as needed

## Additional context
<!-- Add any other context, implementation notes, or design decisions
-->
2025-11-10 17:56:59 +02:00
Jeff Clyne
e4bd866fdd
Adds optional _meta field to Tool (#339)
<!-- Provide a brief summary of your changes -->

## Motivation and Context
The recently released openAI [Apps SDK
](https://developers.openai.com/apps-sdk/reference/#_meta-fields-the-client-provides)adds
a '__meta_' field on the Tool Descriptor. This would be in addition to
it being available on Messages. It remains optional and defaults to an
empty json object, following existing conventions.


## How Has This Been Tested?
Unit tests for serialization added

## Breaking Changes
N/A

## Types of changes
<!-- What types of changes does your code introduce? Put an `x` in all
the boxes that apply: -->
- [ ] Bug fix (non-breaking change which fixes an issue)
- [X] New feature (non-breaking change which adds functionality)
- [ ] Breaking change (fix or feature that would cause existing
functionality to change)
- [ ] Documentation update

## Checklist
<!-- Go over all the following points, and put an `x` in all the boxes
that apply. -->
- [X] I have read the [MCP
Documentation](https://modelcontextprotocol.io)
- [X] My code follows the repository's style guidelines
- [X] New and existing tests pass locally
- [X] I have added appropriate error handling
- [X] I have added or updated documentation as needed

## Additional context
https://developers.openai.com/apps-sdk

https://developers.openai.com/apps-sdk/reference/#_meta-fields-the-client-provides

---------

Co-authored-by: Pavel Gorgulov <devcrocod@gmail.com>
2025-11-04 19:39:22 +02:00
Konstantin Pavlov
935a1eddbc
Add Ktor BOM for dependency management across all modules, run Kotlin-MCP-Server Sample (#367)
## Motivation and Context
- 📦 Unifies Ktor library versioning by introducing the Ktor BOM
dependency.
- ✅  Re-enable build of MCP Server Sample

## How Has This Been Tested?
Regression tests

## Breaking Changes
No

## Types of changes
<!-- What types of changes does your code introduce? Put an `x` in all
the boxes that apply: -->
- [ ] Bug fix (non-breaking change which fixes an issue)
- [ ] New feature (non-breaking change which adds functionality)
- [ ] Breaking change (fix or feature that would cause existing
functionality to change)
- [ ] Documentation update
- [x] Build configuration update

## Checklist
<!-- Go over all the following points, and put an `x` in all the boxes
that apply. -->
- [x] I have read the [MCP
Documentation](https://modelcontextprotocol.io)
- [x] My code follows the repository's style guidelines
- [x] New and existing tests pass locally
- [x] I have added appropriate error handling
- [x] I have added or updated documentation as needed

## Additional context
<!-- Add any other context, implementation notes, or design decisions
-->
2025-11-04 11:44:39 +02:00
dependabot[bot]
a75e7a8197
Bump org.openapi.generator from 7.16.0 to 7.17.0 (#362)
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2025-11-03 20:33:29 +02:00
Pavel Gorgulov
c5a254b83f
Refactor WebSocket dependency (#350)
Extracted WebSocket as an optional dependency of the core module
2025-10-28 11:52:07 +01:00
dependabot[bot]
3b56429126
Bump org.openapi.generator from 7.15.0 to 7.16.0 (#305)
Bumps org.openapi.generator from 7.15.0 to 7.16.0.


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Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Konstantin Pavlov <1517853+kpavlov@users.noreply.github.com>
2025-10-13 22:47:35 +03:00
Jeff Clyne
3d82883375
Compatibility updates for gradle 9.x.x (#313)
Changes to kotlin-sdk-core/build.gradle.kts to be compatible with gradle
9.x.x

## Motivation and Context
If including this project into a composite build that uses gradle 9.x.x,
recent changes to the build.gradle.kts are not compatible.

## How Has This Been Tested?
The build still works with gradle 8.x

## Breaking Changes
N/A

## Types of changes
<!-- What types of changes does your code introduce? Put an `x` in all
the boxes that apply: -->
- [x] Bug fix (non-breaking change which fixes an issue)
- [ ] New feature (non-breaking change which adds functionality)
- [ ] Breaking change (fix or feature that would cause existing
functionality to change)
- [ ] Documentation update

## Checklist
<!-- Go over all the following points, and put an `x` in all the boxes
that apply. -->
- [x] I have read the [MCP
Documentation](https://modelcontextprotocol.io)
- [x] My code follows the repository's style guidelines
- [x] New and existing tests pass locally
- [x] I have added appropriate error handling
- [x] I have added or updated documentation as needed

## Additional context
<!-- Add any other context, implementation notes, or design decisions
-->
2025-10-11 08:25:01 +02:00
Jeff Clyne
2f1b659efd
Adds 'instructions' string to the Server and propagates to the InitializeResult (#290)
<!-- Provide a brief summary of your changes -->

## Motivation and Context
The
[schema](cca15204f6/schema/2025-03-26/schema.ts (L192))
for the InitializeResult contains an optional 'instructions' string

## Additional context
The instructions string is included in the schema for for version
"2025-03-26"

The instructions in the Server class are given as a provider function
with the result of the provider propagated to the underlying
ServerSession. As the ServerSession change is meant to allow for a
'Singleton scoped' server class, this provides the ability to
dynamically modify the instructions at the server level but have them be
immutable per session.
 
This also refactors the `serverInfo` and `instructions` properties to be
protected. This `Server` class is open and meant to be overridden, there
is no harm in having these immutable properties available to subclasses.

This adds the serverInstructions to the client as returned from the
InitializeResult. This is used to verify the response in the Server
tests.
2025-10-03 18:12:37 +02:00
Konstantin Pavlov
73c0af891b
Disable OpenAPI Generator (#301)
One may run it manually to generate classes from JSON Schema

## Motivation and Context

Most of the generated classes could not be used in the current API
today.

On the other hand, it is useful to be able to generate such classes to
simplify manual API synchronization. So, Gradle plugin configuration is
preserved, but detached from the build pipeline.
2025-10-01 18:28:22 +02:00
Konstantin Pavlov
d962e28ff7
Generate MCP classes with OpenAPI Generator (#294)
- Add OpenAPI Generator to build system to automatically generate MCP
protocol data classes from the official schema.
- Configure code quality tools to exclude generated files
- Add deserialization test

## Motivation and Context

Writing classes by hand is error-prone, when json schema exists. See
#185,
Also, autogenerating model classes ensures the SDK is in sync with the
protocol and can quickly catch up with its changes (see #218)

## How Has This Been Tested?
Regression tests

## Breaking Changes
No

## Types of changes
<!-- What types of changes does your code introduce? Put an `x` in all
the boxes that apply: -->
- [ ] Bug fix (non-breaking change which fixes an issue)
- [x] New feature (non-breaking change which adds functionality)
- [ ] Breaking change (fix or feature that would cause existing
functionality to change)
- [ ] Documentation update

## Checklist
<!-- Go over all the following points, and put an `x` in all the boxes
that apply. -->
- [x] I have read the [MCP
Documentation](https://modelcontextprotocol.io)
- [ ] My code follows the repository's style guidelines
- [ ] New and existing tests pass locally
- [ ] I have added appropriate error handling
- [ ] I have added or updated documentation as needed

## Additional context
<!-- Add any other context, implementation notes, or design decisions
-->
2025-09-29 12:34:32 +03:00
Jeff Clyne
8958f4c731
Capture version at configuration time to avoid configuration cache issue (#291)
Moves capture of the project version to execution time to avoid a gradle
configuration cache issue
2025-09-29 11:00:25 +02:00
Maria Tigina
d86813636e
Introduce server sessions (#198)
Introduce a `ServerSession` to manage multiple connections to the mcp
server. `Protocall` logic of the `Server` was moved to `ServerSession`,
while MCP resources logic remained in `Server`

## Motivation and Context
1. Fix the multiple connection issues reported for SSE transport
2. Avoid server duplications during configurations: currently every connection
creates a session, but the server stays single

## How Has This Been Tested?

Added `SseIntegrationTest` and `WebSocketIntegrationTest` integration
tests to check connection with single and multiple clients

## Breaking Changes

This change caused several depreciations:
1. The `Server` -> `Protocol` inheritance (which caused single
connection issue) should be removed in future releases, now, all the
methods inherited from `Protocall` marked as `Deprecated` with a
`Warning`
2. Websocket Ktor server initialization changes in order not to create
server instance per connection

## Types of changes

- [ ] Bug fix (non-breaking change which fixes an issue)
- [x] New feature (non-breaking change which adds functionality)
- [ ] Breaking change (fix or feature that would cause existing
functionality to change)
- [ ] Documentation update

## Checklist
<!-- Go over all the following points, and put an `x` in all the boxes
that apply. -->
- [x] I have read the [MCP
Documentation](https://modelcontextprotocol.io)
- [x] My code follows the repository's style guidelines
- [x] New and existing tests pass locally
- [x] I have added appropriate error handling
- [x] I have added or updated documentation as needed

## Additional context
<!-- Add any other context, implementation notes, or design decisions
-->

---------

Co-authored-by: devcrocod <devcrocod@gmail.com>
2025-09-29 10:10:07 +03:00
Pavel Gorgulov
d909835025
migration from jreleaser to mavenPublish plugin (#277)
#152 

## Motivation and Context
To simplify publishing, use the [recommended
plugin](https://www.jetbrains.com/help/kotlin-multiplatform-dev/multiplatform-publish-libraries.html#set-up-the-publishing-plugin)

## Breaking Changes
no

## Types of changes
- [x] Bug fix (non-breaking change which fixes an issue)
- [ ] New feature (non-breaking change which adds functionality)
- [ ] Breaking change (fix or feature that would cause existing
functionality to change)
- [ ] Documentation update

## Checklist
- [x] I have read the [MCP
Documentation](https://modelcontextprotocol.io)
- [x] My code follows the repository's style guidelines
- [x] New and existing tests pass locally
- [ ] I have added appropriate error handling
- [ ] I have added or updated documentation as needed
2025-09-17 13:07:07 +02:00
Pavel Gorgulov
41fc351cd2
Move generateLibVersion task to kotlin-sdk-core (#274)
fix #272 

## How Has This Been Tested?
Locally

## Breaking Changes
No

## Types of changes
- [x] Bug fix (non-breaking change which fixes an issue)
- [ ] New feature (non-breaking change which adds functionality)
- [ ] Breaking change (fix or feature that would cause existing
functionality to change)
- [ ] Documentation update

## Checklist
- [x] I have read the [MCP
Documentation](https://modelcontextprotocol.io)
- [x] My code follows the repository's style guidelines
- [x] New and existing tests pass locally
- [ ] I have added appropriate error handling
- [ ] I have added or updated documentation as needed
2025-09-16 17:17:36 +03:00
Konstantin Pavlov
557bc5ef6a
Add module documentation and enhance Dokka configuration (#261)
##  #252 Add module documentation and enhance Dokka configuration

## How Has This Been Tested?

`./gradlew :docs:dokkaGenerate`

## Changes

- Add workflow to build and publish API documentation with Dokka
- Introduce `.github/workflows/apidocs.yaml` to build and deploy API
docs on `main` and release events.
  - Configure Gradle for Dokka builds and update project dependencies.
  - Include `:docs` module in project settings.
- Introduce `Module.md` for `kotlin-sdk-server`, `kotlin-sdk-client`,
and `kotlin-sdk-core` modules.
- Update `.gitignore` to include `.idea/icon.png` and add placeholder
icon files
- Remove outdated documentation HTML files

## Types of changes
<!-- What types of changes does your code introduce? Put an `x` in all
the boxes that apply: -->
- [x] Bug fix (non-breaking change which fixes an issue)
- [ ] New feature (non-breaking change which adds functionality)
- [ ] Breaking change (fix or feature that would cause existing
functionality to change)
- [x] Documentation update

## Checklist
<!-- Go over all the following points, and put an `x` in all the boxes
that apply. -->
- [ ] I have read the [MCP
Documentation](https://modelcontextprotocol.io)
- [ ] My code follows the repository's style guidelines
- [ ] New and existing tests pass locally
- [ ] I have added appropriate error handling
- [x] I have added or updated documentation as needed

## Additional context
<!-- Add any other context, implementation notes, or design decisions
-->

---------

Co-authored-by: devcrocod <devcrocod@gmail.com>
2025-09-15 17:44:43 +02:00
Pavel Gorgulov
2137f6aa88
Add kotlinx-coroutines-core-wasm dependency (#255)
workaround
2025-09-11 18:49:11 +02:00
Konstantin Pavlov
7bdd6b93f6
Refactor integration tests (#256)
## Motivation and Context

Flaky integration tests

## How Has This Been Tested?

`./gradlew check`

## Changes

- Use random port for Ktor in tests
- Remove unused `TestUtils` utility class.
- Replace `runTest` with `runBlocking` in test cases.
- Adjust imports and formatting for consistency.
- Add `Awaitility` dependency for dynamic server setup.
- Update `Duration` usage from milliseconds to seconds.
- Minor configuration and code formatting updates.

## Types of changes
<!-- What types of changes does your code introduce? Put an `x` in all
the boxes that apply: -->
- [ ] Bug fix (non-breaking change which fixes an issue)
- [ ] New feature (non-breaking change which adds functionality)
- [ ] Breaking change (fix or feature that would cause existing
functionality to change)
- [ ] Documentation update
- [x] Test update

## Checklist
<!-- Go over all the following points, and put an `x` in all the boxes
that apply. -->
- [ ] I have read the [MCP
Documentation](https://modelcontextprotocol.io)
- [ ] My code follows the repository's style guidelines
- [ ] New and existing tests pass locally
- [ ] I have added appropriate error handling
- [ ] I have added or updated documentation as needed

## Additional context
<!-- Add any other context, implementation notes, or design decisions
-->
2025-09-11 19:38:09 +03:00
木葉 Scarlet
b1ba0cd371
Remove dependency on CIO engine (#223)
<!-- Provide a brief summary of your changes -->
Replace the CIO dependency with only server/client core dependency.

## Motivation and Context
<!-- Why is this change needed? What problem does it solve? -->
In order to minimize the size of package. There are probably other
existing engines like Netty/Tomcat(server) or Java/OkHttp/Apache(client)
in the classpath. So we can reuse existing infrastructure.

## How Has This Been Tested?
<!-- Have you tested this in a real application? Which scenarios were
tested? -->
I have run:
- kotlin-sdk-client: jvmTest, jsTest
- kotlin-sdk-test: jvmTest, jsTest
- kotlin-sdk-server: allTests
- All `build` of samples

I have an issue about `samples/kotlin-mcp-server`.
`io.modelcontextprotocol` is not found in `commonMain`.

## Breaking Changes
<!-- Will users need to update their code or configurations? -->
Yes. They need to `implementation` CIO engine manually if they use it in
their app.

## Types of changes
<!-- What types of changes does your code introduce? Put an `x` in all
the boxes that apply: -->
- [ ] Bug fix (non-breaking change which fixes an issue)
- [ ] New feature (non-breaking change which adds functionality)
- [x] Breaking change (fix or feature that would cause existing
functionality to change)
- [x] Documentation update

## Checklist
<!-- Go over all the following points, and put an `x` in all the boxes
that apply. -->
- [ ] I have read the [MCP
Documentation](https://modelcontextprotocol.io)
- [ ] My code follows the repository's style guidelines
- [x] New and existing tests pass locally
- [ ] I have added appropriate error handling
- [ ] I have added or updated documentation as needed

## Additional context
<!-- Add any other context, implementation notes, or design decisions
-->

closes https://github.com/modelcontextprotocol/kotlin-sdk/issues/111

---------

Co-authored-by: Konstantin Pavlov <1517853+kpavlov@users.noreply.github.com>
2025-09-11 14:30:36 +03:00
Sergey Karpov
a23856e68e
Add recovery during deserialization and upload test artifacts (#243)
* Add recovery during message deserialization, update workflow, use JUnit Platform for JVM tests
2025-08-29 12:35:01 +02:00
Maria Tigina
b37a0f62d0
Fix serializer for CreateElicitationResult (#240)
* Fix serializer for CreateElicitationResult

* Add tests
2025-08-25 18:29:11 +02:00
Maria Tigina
9bb851aba2
Fix deserialization in read buffer (#225)
* Add deserialization error processing

* Add test
2025-08-19 19:00:35 +02:00
Didier Villevalois
ad8205297e
Add missing title, size and annotation attributes on Resource/ResourceTemplate and other types (#219)
* Add missing resource and resource template title and size

* Add missing annotations

* Add serialization test for Annotations

* Dump APIs
2025-08-19 13:45:17 +02:00
zyfy29
fc02cecb79
rename ResourceReference to ResourceTemplateReference (#193)
* chore: rename ResourceReference to ResourceTemplateReference

* rename resource references in tests and update api

---------

Co-authored-by: devcrocod <devcrocod@gmail.com>
2025-08-06 10:30:05 +00:00
Pavel Gorgulov
91cf1205af
Add ktlint (#213)
* Add ktlint

* Simplify `initClient` function and clean imports in SseIntegrationTest.
2025-08-05 13:10:44 +00:00
Pavel Gorgulov
b0f075900a
Fix incorrect deserializer mapping for tool and prompt list notifications (#195) 2025-08-05 10:51:51 +00:00
Pavel Gorgulov
8698b96dd2
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
2025-08-04 11:53:38 +02:00