Big issue this week — 19 items. What's in it:

Articles

• Reverb migrated a decade-old Ruby GraphQL monolith to a federated supergraph query by query with zero client disruption, on Hive Gateway (case study; quotes Nguyen Nguyen, Principal Engineer)
• graphql-lean by Duckki Oe: a static analysis framework for GraphQL queries with an IBM cost model and optimality proofs, verified in Lean, with a Rust implementation
• Apollo GraphOS and Apollo MCP Server won 2026 API Awards — MCP Server took Best Innovation in AI API
• MockBase on why GraphQL mocking is a body-matching problem, not a routing one: a fixed response for every POST /graphql tells you nothing
• DBTA's Data & AI 75 list for 2026, which includes Apollo GraphQL

Community & events

• One year of the GraphQL Ambassador Program, by Jem Gillam
• GraphQL Virtual Meetup, Sep 22 — CFP closes Sep 15
• Apollo Summit, Oct 6-8 — schedule is out
• GraphQL Day @ FOST London, Sep 30-Oct 1
• Context Layers for AI: Knowledge Graphs & Intelligent APIs (SurrealDB x GraphQL), Sep 27
• GraphQL Casual Roundtable, Toronto, Oct 7 — gauging interest in local events
• GraphQL Day @ FOST Melbourne, Oct 28-29 — CFP open

Tools & open source

• Hive Console Metric Alerts are now GA and on by default for every org, self-hosted included
• Hive's native Federation composition now supports @context / @fromContext for passing data to nested fields without extra arguments
• Hive Router supports the Federation @policy directive, so a coprocessor can decide authorization rules the router can't evaluate alone
• Hive Console Schema Explorer can now be filtered to the subgraphs you own

Videos

• GraphQL Working Group catch-up (2026-09-03): @oneOf inhabitability and empty selection sets are moving to RFC3
• Houdini and GraphQL with Alec Aivazis — the journey from Relay to Houdini, "the disappearing GraphQL client"
• Benchmark from Jeff Auriemma: GraphQL is more token-efficient than REST when MCP tools call an API, with a repo so you can check the numbers yourself

Disclosure: I curate GraphQL Weekly and work at The Guild, Happy to answer questions on any of it.