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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

Schema attribute enum type hint does not allow null values

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.

#270 In modelcontextprotocol/php-sdk;

· acantepie opened on Mar 19, 2026

[Server] Fix to make Symfony Finder component optional

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 267

#267 In modelcontextprotocol/php-sdk;

· bigdevlarry opened on Mar 15, 2026

[Server] feat: relax StrictOidcDiscoveryMetadataPolicy and add Dynamic Client Registration middleware (RFC 7591)

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 269

#269 In modelcontextprotocol/php-sdk;

· simonchrz opened on Mar 17, 2026

[Server] Fix to let schema attribute enum type hint allow null values

needs confirmationNeeds confirmation that the PR is actually required or needed.Needs confirmation that the PR is actually required or needed.

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

Status: Open (in progress).

modelcontextprotocol/php-sdknumber 271

#271 In modelcontextprotocol/php-sdk;

· bigdevlarry opened on Mar 19, 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