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[Schema] Stop rejecting elicitation schemas the specification allows (#437)

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* [Schema] Stop rejecting elicitation schemas the specification allows

The specification makes `title` optional on every elicitation schema
definition. AbstractSchemaDefinition required it, so a client reading a
conformant server's elicitation/create refused the request - and a server
building one could not omit it either.

`title` is now nullable on all seven definitions, omitted from the
serialized form when absent, and rejected only when present and not a
string.

* Fix stale title docblocks; allow omitting title where safe

* Give Number's title param a default too

* Apply suggestions from code review

Co-authored-by: Christopher Hertel <mail@christopher-hertel.de>
This commit is contained in:
Christopher Hertel 2026-08-18 19:49:15 +02:00 • committed by GitHub
commit cf2c4d4ead
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1 changed files with 144 additions and 65 deletions
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16
tests/Unit/Schema/Elicitation/StringSchemaDefinitionTest.php
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@ -114,13 +114,23 @@ final class StringSchemaDefinitionTest extends TestCase
$this->assertSame(100, $schema->maxLength);
}
public function testFromArrayWithMissingTitle(): void
public function testFromArrayWithoutTitleIsAccepted(): void
{
// `title` is optional in the specification, so a server that omits it
// must still be readable.
$schema = StringSchemaDefinition::fromArray([]);
$this->assertNull($schema->title);
$this->assertArrayNotHasKey('title', $schema->jsonSerialize());
}
public function testFromArrayRejectsNonStringTitle(): void
{
$this->expectException(InvalidArgumentException::class);
$this->expectExceptionMessage('Missing or invalid "title"');
$this->expectExceptionMessage('Invalid "title" for string schema definition.');
/* @phpstan-ignore argument.type */
StringSchemaDefinition::fromArray([]);
StringSchemaDefinition::fromArray(['title' => 42]);
}
public function testJsonSerializeWithMinimalParams(): void