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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

[Schema] Add title field to Prompt for MCP spec compliance

breaking changeBreaking the Backwards Compatibility PromiseBreaking the Backwards Compatibility Promise

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

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

Status: Open (in progress).

modelcontextprotocol/php-sdknumber 278

#278 In modelcontextprotocol/php-sdk;

· chr-hertel opened on Apr 11, 2026

Missing title and arguments fields in Prompt definition (spec compliance)

bugSomething isn't workingSomething isn't working

P2Moderate issues affecting some users, edge cases, potentially valuable featureModerate issues affecting some users, edge cases, potentially valuable feature

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

Status: Open.

Bug

#276 In modelcontextprotocol/php-sdk;

· vjik opened on Apr 5, 2026