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[Server] fix: clear() wiping dynamically registered tools by tracking discovered state on references

needs more workNot ready to be merged yet, needs additional follow-up from the author(s).Not ready to be merged yet, needs additional follow-up from the author(s).

ServerIssues & PRs related to the Server componentIssues & PRs related to the Server component

Status: Open (in progress).

modelcontextprotocol/php-sdknumber 251

#251 In modelcontextprotocol/php-sdk;

· soyuka opened on Mar 4, 2026

[Server] Add configurable session garbage collection

ServerIssues & PRs related to the Server componentIssues & PRs related to the Server component

Status: Open (in progress).

modelcontextprotocol/php-sdknumber 258

#258 In modelcontextprotocol/php-sdk;

· chr-hertel opened on Mar 10, 2026

[Server] Add DNS rebinding protection feature with middleware

improves spec complianceImproves consistency with other SDKs such as TyepScriptImproves consistency with other SDKs such as TyepScript

ServerIssues & PRs related to the Server componentIssues & PRs related to the Server component

Status: Open (in progress).

modelcontextprotocol/php-sdknumber 260

#260 In modelcontextprotocol/php-sdk;

· chr-hertel opened on Mar 10, 2026

[Server] Extract CORS handling into CorsMiddleware

breaking changeBreaking the Backwards Compatibility PromiseBreaking the Backwards Compatibility Promise

ServerIssues & PRs related to the Server componentIssues & PRs related to the Server component

Status: Open (in progress).

modelcontextprotocol/php-sdknumber 277

#277 In modelcontextprotocol/php-sdk;

· chr-hertel opened on Apr 11, 2026

[Client] add client conformance test suite

bugSomething isn't workingSomething isn't working

ClientIssues & PRs related to the Client componentIssues & PRs related to the Client component

Status: Open (in progress).

modelcontextprotocol/php-sdknumber 279

#279 In modelcontextprotocol/php-sdk;

· chr-hertel opened on Apr 11, 2026

CS update after release of v3.95

Status: Open (in progress).

modelcontextprotocol/php-sdknumber 282

#282 In modelcontextprotocol/php-sdk;

· chr-hertel opened on Apr 11, 2026

[Schema][Server] Add top-level title to Tool

improves spec complianceImproves consistency with other SDKs such as TyepScriptImproves consistency with other SDKs such as TyepScript

needs more workNot ready to be merged yet, needs additional follow-up from the author(s).Not ready to be merged yet, needs additional follow-up from the author(s).

SchemaIssues & PRs related to the Schema componentIssues & PRs related to the Schema component

ServerIssues & PRs related to the Server componentIssues & PRs related to the Server component

Status: Open (in progress).

modelcontextprotocol/php-sdknumber 288

#288 In modelcontextprotocol/php-sdk;

· e0ipso opened on Apr 19, 2026

[Server] Fix case sensitivity for http header

bugSomething isn't workingSomething isn't working

ServerIssues & PRs related to the Server componentIssues & PRs related to the Server component

Status: Open (in progress).

modelcontextprotocol/php-sdknumber 283

#283 In modelcontextprotocol/php-sdk;

· chr-hertel opened on Apr 11, 2026