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| og:image:alt | Motivation and Context
The MCP specification evolves continuously; domain types must absorb
new fields and subtypes without breaking existing clients or servers.
On the 1.x line this is structurall... |
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| April 20, 2026 17:20 | https://github.com/modelcontextprotocol/java-sdk/pull/927#commits-pushed-4ca9935 |
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| feat!: consistent JSON forward/backward compatibility (2.0 foundation) | https://github.com/modelcontextprotocol/java-sdk/pull/927/commits/4ca9935c800c585db2d6264d94caa096b9e99bfd |
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breaking-change
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v2
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| Apr 20, 2026 | https://github.com/modelcontextprotocol/java-sdk/pull/927#event-24686285577 |
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| April 20, 2026 18:47 | https://github.com/modelcontextprotocol/java-sdk/pull/927#commits-pushed-d7de6b8 |
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| Formatting | https://github.com/modelcontextprotocol/java-sdk/pull/927/commits/d7de6b8baf5f4ea0ac33088938ad8281b59e2e6b |
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| Merge branch 'main' into json-compatibility | https://github.com/modelcontextprotocol/java-sdk/pull/927/commits/52edd371fab6c97b87d15093c48875532fd8d7b1 |
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| Update migration doc | https://github.com/modelcontextprotocol/java-sdk/pull/927/commits/d1cad256fbc2dd892213e57f152e446f42f21f44 |
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Apr 20, 2026
| https://github.com/modelcontextprotocol/java-sdk/pull/927#ref-pullrequest-4297507574 |
|
feat!: enforce required MCP spec fields in McpSchema; lenient wire deserialization
#928
| https://github.com/modelcontextprotocol/java-sdk/pull/928 |
|
| https://github.com/chemicL |
| Remove temporary file | https://github.com/modelcontextprotocol/java-sdk/pull/927/commits/12905a4d2e1b3e3a9ffb285bd995b253cec95e6f |
| 12905a4 | https://github.com/modelcontextprotocol/java-sdk/pull/927/commits/12905a4d2e1b3e3a9ffb285bd995b253cec95e6f |
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Apr 23, 2026
| https://github.com/modelcontextprotocol/java-sdk/pull/927#pullrequestreview-4161709810 |
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View reviewed changes
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| mcp-core/src/main/java/io/modelcontextprotocol/spec/McpSchema.java | https://github.com/modelcontextprotocol/java-sdk/pull/927/files/12905a4d2e1b3e3a9ffb285bd995b253cec95e6f#diff-8ac83bd9fbe0774d8d98808d03fc46fab670b2bb8e09a1acc84e543886e61d79 |
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| mcp-core/src/main/java/io/modelcontextprotocol/spec/McpSchema.java | https://github.com/modelcontextprotocol/java-sdk/pull/927/files/12905a4d2e1b3e3a9ffb285bd995b253cec95e6f#diff-8ac83bd9fbe0774d8d98808d03fc46fab670b2bb8e09a1acc84e543886e61d79 |
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| Apr 23, 2026 | https://github.com/modelcontextprotocol/java-sdk/pull/927#discussion_r3130176991 |
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| mcp-core/src/main/java/io/modelcontextprotocol/client/transport/ServerParameters.java | https://github.com/modelcontextprotocol/java-sdk/pull/927/files/12905a4d2e1b3e3a9ffb285bd995b253cec95e6f#diff-a7bc2bce936809c0c55706240e64f5a22e05658a45d4a45778f0c439ae31c054 |
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| Please reload this page | https://github.com/modelcontextprotocol/java-sdk/pull/927 |
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| Apr 24, 2026 | https://github.com/modelcontextprotocol/java-sdk/pull/927#discussion_r3136351122 |
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| 2.0.0-M1 | https://github.com/modelcontextprotocol/java-sdk/milestone/18 |
| Apr 23, 2026 | https://github.com/modelcontextprotocol/java-sdk/pull/927#event-24800802911 |
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| Apr 23, 2026 | https://github.com/modelcontextprotocol/java-sdk/pull/927#issuecomment-4305312343 |
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| Apr 24, 2026 | https://github.com/modelcontextprotocol/java-sdk/pull/927#issuecomment-4311770159 |
| spring-io/spring-javaformat#393 | https://github.com/spring-io/spring-javaformat/issues/393 |
| Please reload this page | https://github.com/modelcontextprotocol/java-sdk/pull/927 |
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May 7, 2026
| https://github.com/modelcontextprotocol/java-sdk/pull/927#ref-issue-3798815193 |
|
Handle schema validation failures gracefully
#741
| https://github.com/modelcontextprotocol/java-sdk/issues/741 |
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| chemicL | https://github.com/chemicL |
| June 11, 2026 14:40 | https://github.com/modelcontextprotocol/java-sdk/pull/927#event-26631050399 |
|
Add @JsonIgnoreProperties(ignoreUnknown = true) to capability sub-records
#852
| https://github.com/modelcontextprotocol/java-sdk/pull/852 |
|
ToolCapabilities needs to be marked with @JsonIgnoreProperties(ignoreUnknown = true) to avoid errors.
#734
| https://github.com/modelcontextprotocol/java-sdk/issues/734 |
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breaking-change
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v2
| https://github.com/modelcontextprotocol/java-sdk/issues?q=state%3Aopen%20label%3Av2 |
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2.0.0-M1
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