Improvements

• Config: allow 'extra' in root of single-project config files (#5030) by Sean Barag ([commit](https://github.com/facebook/relay/commit/292ae5abdfb6))
• Make schema def rendering more robust (#5036) by Jordan Eldredge ([commit](https://github.com/facebook/relay/commit/e2aaaa87ea4a))
• Add config + validation to enable enforcement of not using fields by Steven Gschwind ([commit](https://github.com/facebook/relay/commit/19c25299db67))
• Support quickfix suggestions in validation rules by Jianfeng Chen ([commit](https://github.com/facebook/relay/commit/193d6c344ed7))
• Improve missing fragment data error message to point to @alias docs. by Jordan Eldredge ([commit](https://github.com/facebook/relay/commit/f933d6c065c7))
• Make variables arg in fetchQuery NoInfer to improve errors by Sam Zhou ([commit](https://github.com/facebook/relay/commit/6314d78f67a5))
• Rust code for Hack Client LSP by Deepak Singh ([commit](https://github.com/facebook/relay/commit/c3b07efad983))
• Make variables prop in useLazyLoadQuery NoInfer to improve errors by Sam Zhou ([commit](https://github.com/facebook/relay/commit/11932da30a1b))
• Required-on-nonnull-field checking to descend into inline fragments by Gordy French ([commit](https://github.com/facebook/relay/commit/94f107a3a15e))
• Make variables prop in commitMutation param NoInfer to improve errors by Sam Zhou ([commit](https://github.com/facebook/relay/commit/333073191bb6))
• Add pass through renders type TChildren (#5021) by Jenny Chen ([commit](https://github.com/facebook/relay/commit/a6ab8e5ba0dc))
• Make MockResolvers readonly by Sam Zhou ([commit](https://github.com/facebook/relay/commit/94eaa54c733f))
• Add platform info maker fn for fragment spread by Janette Cheng ([commit](https://github.com/facebook/relay/commit/40e7b4658a83))
• Emit raw query text in artifact for @relay_test_operation operations (#4999) by Jakob Hansen ([commit](https://github.com/facebook/relay/commit/332053295031))

Documentation Improvements

• Update broken url in error message by Matthew Saunders ([commit](https://github.com/facebook/relay/commit/8839d348fa37))
• Update compiler.md to correct spelling of support (#5034) by UKEME BASSEY ([commit](https://github.com/facebook/relay/commit/4660b130fc20))

Miscellaneous

• Remove extraneous println by Gordy French ([commit](https://github.com/facebook/relay/commit/68afcf3207a8))

Experimental Changes

• Type information tool by Jan Kassens ([commit](https://github.com/facebook/relay/commit/8caf93896ae0))
• Relay type information tool by Jan Kassens ([commit](https://github.com/facebook/relay/commit/ad4b15c914dc))
• Allow ClientQuery in usePreloadedQuery by Tianyu Yao ([commit](https://github.com/facebook/relay/commit/2a079229f517))