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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

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