☕️ Apple opens Siri to every developer

• Apple has opened Siri AI to all third-party developers through a new preview, letting apps handle complex spoken requests like booking restaurant reservations, checking deliveries, and placing orders that were previously restricted to a narrow set of supported actions.
• Using the App Intents framework, developers can build custom actions and chain multiple steps into one "skill", such as finding a product and sharing it via Messages, while Siri taps Spotlight's semantic index to surface app content outside predefined categories.
• The iOS 27.3 beta already lets Siri organize Safari tabs, find visited places, and archive files across 15 Apple apps, but third-party integrations remain in developer testing, with customer features expected in a few months and App Store submissions in spring 2027.

• Revolut cut its AI coding inference costs by about 90% in under a year by switching its default from commercial services like Claude Code to self-hosted open-weights GLM models, now running GLM-5.3 across its own GPU fleet.
• Self-hosting GLM-5.1 cost roughly $0.30 per million tokens, about a tenth of Codex or Claude Code, and the removal of token budgets let its ~2,000 engineers hand debugging and Jira and Confluence tickets to the models, driving a 60% coding-time improvement.
• Serving GLM-5.3 on 56 Nvidia B200 GPUs, Revolut hit sub-3-second time to first token at 256K context and ~200 tokens/second by tuning hyperparameters and switching to NVFP4 quantization, but keeps routing vision and UI queries to Gemini or GPT since GLM is text-only.

• Anthropic's Frontier Red Team released FlashProve, an Apache-licensed library that cryptographically proves an API response came from a specific set of model weights without exposing those weights, using the same hash-based proofs behind Ethereum L2s like Starknet.
• The provider publishes a fingerprint of its weights once, then attaches a proof to each reply; on the 400B-parameter Llama 4 Maverick, the prover hits ~110 tokens/sec on one H100, proofs run ~19 MB, and a CPU verifies one in roughly 20 seconds.
• The catch is steep: proving costs 70-95x the GPU time of normal inference, each request waits about five minutes for batching, and context is capped at 1,024 tokens, Anthropic calls it a research prototype and won't maintain the repo.

• Apple released Xcode 27.3 beta 1 today, adding GitHub Copilot to the built-in coding assistant and expanding the roster of AI agents that developers can run directly inside the IDE.
• Copilot joins ChatGPT, Claude, and Google Gemini, which Apple has integrated across recent releases, with agentic capabilities via Codex and Claude Agent arriving back in Xcode 26.3.
• Apple frames this as a win for developers at companies standardized on Copilot, who can now use their org's preferred tool in Xcode; the stable 27.3 release is expected in December.

• Vitest 5.0 shipped from VoidZero with speed as its headline, having inline projects share a single Vite server while quietly tightening several long-standing defaults.
• Across a benchmark suite spanning a five-file package to a sizeable monolith, the team reports roughly 8-25% gains, with VM pool scenarios hitting the top end, from fewer main-to-worker round trips and reused compiled code.
• It now requires Vite 6.4 and Node.js 22.12, makes unawaited async assertions fail outright, and the dangerous migration case is suites that pass locally on Vitest 4 then go red in CI over call-count assertions leaking mock history.

• Maple rebuilt its 287,000-line, 131-route web app off React onto Foldkit, an Elm Architecture layer on Effect, with Claude doing the port in three days, verified by a custom harness proving the two apps behaved identically.
• The React version scattered state across hundreds of atom hook calls over many files; Foldkit centralizes all state in one Model mutated by a single function, though losing route-based code splitting roughly doubles the startup bundle from 703 KB gzipped.
• A Playwright harness compared both apps across 2,600+ deterministic variants on pixels, structure, request logs and ARIA; it surfaced old React bugs and let agents fix only the port, while later reviews still caught ~180 inter-screenshot defects the diffs missed.

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